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Natural systems can undergo critical transitions, leading to substantial socioeconomic and ecological outcomes. ‘Ecological resilience’ has been proposed to describe the capacity of natural systems to absorb external perturbation and reorganize while undergoing change so as to still retain essentially the same function, structure, identity, and feedbacks. However, the mere application of ecological resilience in theoretical research and the lack of quantitative approaches present considerable obstacles for predicting critical transitions and understanding their mechanisms. Large marine ecosystems (LMEs) in the Northwestern Pacific are characterized by great biodiversity and productivity, as well as remarkable warming in recent decades. However, no information is available on the critical transitions and ecological resilience of LMEs in response to warming. Therefore, we applied an integrated resilience assessment framework to fisheries catch data from seven LMEs covering a wide range of regions, from tropical to subarctic, in the Northwestern Pacific to identify critical transitions, assess ecological resilience, and reconstruct folded stability landscapes, with a specific focus on the effects of warming. The results provide evidence of the occurrence of critical transitions, with fold bifurcation and hysteresis in response to increasing sea surface temperatures (SST) in the seven LMEs. In addition, these LMEs show similarities and synchronies in structure variations and critical transitions forced by warming. Both dramatic increases in SST and small fluctuations at the corresponding thresholds may trigger critical transitions. Ecological resilience decreases when approaching the tipping points and is repainted as the LMEs shift to alternative stable states with different resilient dynamics. Folded stability landscapes indicate that the responses of LMEs to warming are discontinuous, which may be caused by the reorganization of LMEs as their sensitivity to warming changes. Our study clarifies the nonlinear responses of LMEs to anthropogenic warming and provides examples of quantifying ecological resilience in empirical systems at unprecedented spatial and temporal scales.
Shuyang Ma; Dan Liu; Yongjun Tian; Caihong Fu; Jianchao Li; Peilong Ju; Peng Sun; Zhenjiang Ye; Yang Liu; Yoshiro Watanabe. Critical transitions and ecological resilience of large marine ecosystems in the Northwestern Pacific in response to global warming. Global Change Biology 2021, 1 .
AMA StyleShuyang Ma, Dan Liu, Yongjun Tian, Caihong Fu, Jianchao Li, Peilong Ju, Peng Sun, Zhenjiang Ye, Yang Liu, Yoshiro Watanabe. Critical transitions and ecological resilience of large marine ecosystems in the Northwestern Pacific in response to global warming. Global Change Biology. 2021; ():1.
Chicago/Turabian StyleShuyang Ma; Dan Liu; Yongjun Tian; Caihong Fu; Jianchao Li; Peilong Ju; Peng Sun; Zhenjiang Ye; Yang Liu; Yoshiro Watanabe. 2021. "Critical transitions and ecological resilience of large marine ecosystems in the Northwestern Pacific in response to global warming." Global Change Biology , no. : 1.
The Yellow Sea is the southern limit of the distribution of Pacific cod (Gadus microcephalus), and the Yellow Sea Cold Water Mass (YSCWM) provides an appropriate over-summering habitat for this species. Tidal current is the major component of the Yellow Sea hydrodynamic system, and its periodic variations influence the local ecological conditions and related ecosystems, particularly in the YSCWM, which is stratified in summer. To investigate the influence of tidal currents on Pacific cod growth, otolith daily increment in young-of-the-year (YOY) Pacific cod in the Yellow Sea was analyzed in 2017. These data were integrated with a simulated tidal current using a multi-scenario time-delay analysis. This showed that: (1) the otolith daily increment exhibited a strong signal similar to the fortnightly tidal variation; (2) there was a lag of ∼8 days between the highest growth rate induced by the tidal current variation and monthly spring tide; and (3) the influence of the tidal current on otolith daily growth was stronger after migration of the cod into the YSCWM, particularly during the settlement stage. Given the stratified ocean structure during the over-summering period, enhanced tidal mixing during the fortnightly spring tide would improve the exchange of nutrients and oxygen within the YSCWM, and lead to a delayed response of otolith growth due to feeding/digestion and subsequent growth. Therefore, variations in the tidal current have a marked positive ecological effect on the growth of YOY Pacific cod, and ultimately on the YSCWM ecosystem.
Jianchao Li; Feng Jiang; Rui Wu; Chi Zhang; Yongjun Tian; Peng Sun; Haiqing Yu; Yang Liu; Zhenjiang Ye; Shuyang Ma; Shude Liu; Xiuqiang Dong. Tidally Induced Temporal Variations in Growth of Young‐of‐the‐Year Pacific Cod in the Yellow Sea. Journal of Geophysical Research: Oceans 2021, 126, 1 .
AMA StyleJianchao Li, Feng Jiang, Rui Wu, Chi Zhang, Yongjun Tian, Peng Sun, Haiqing Yu, Yang Liu, Zhenjiang Ye, Shuyang Ma, Shude Liu, Xiuqiang Dong. Tidally Induced Temporal Variations in Growth of Young‐of‐the‐Year Pacific Cod in the Yellow Sea. Journal of Geophysical Research: Oceans. 2021; 126 (6):1.
Chicago/Turabian StyleJianchao Li; Feng Jiang; Rui Wu; Chi Zhang; Yongjun Tian; Peng Sun; Haiqing Yu; Yang Liu; Zhenjiang Ye; Shuyang Ma; Shude Liu; Xiuqiang Dong. 2021. "Tidally Induced Temporal Variations in Growth of Young‐of‐the‐Year Pacific Cod in the Yellow Sea." Journal of Geophysical Research: Oceans 126, no. 6: 1.
Hypoxia is reduced levels of oxygen. Especially in water, due to the complex environment, hypoxic situations often occur. Although fish can survive in low-oxygen waters, this survival ability depends on a complete set of coping mechanisms such as oxygen perception and gene-protein interaction regulation. The research on this mechanism is very meaningful. The present study was undertaken to examine the short-term effects of hypoxia on the brain in Takifugu rubripes. We sequenced the transcriptomes of the brain in T. rubripes to studied their response mechanism to acute hypoxia. Total 167 genes with adjusted P values<0.05 were differentially expressed in the brain of T. rubripes exposed to acute hypoxia. However, hif1a, the master transcriptional regulator of the adaptive response to hypoxia, was not significantly regulated, which indicated that the T. rubripes brain might prevent the HIF-1 signaling pathway. Then Gene Ontology and KEGG Enrichment Analysis were carried out. The results indicated that hypoxia could cause metabolic and neurological changes, showing the clues of their adaptation to acute hypoxia. Overall, the sequenced transcriptomes of the brain in T. rubripes showed small changes under acute hypoxia. As the most complex and important organ, the brain of T. rubripes might be able to create a self-protection mechanism to resist or reduce damage caused by acute hypoxia stress.
Mingxiu Bao; Fengqin Shang; Fujun Liu; Ziwen Hu; Shengnan Wang; Xiao Yang; Yundeng Yu; HongBin Zhang; Chihang Jiang; Jielan Jiang; Yang Liu; Xiuli Wang. Comparative Transcriptomic Analysis of the Brain in Takifugu Rubripes Shows Its Tolerance to Acute Hypoxia. 2021, 1 .
AMA StyleMingxiu Bao, Fengqin Shang, Fujun Liu, Ziwen Hu, Shengnan Wang, Xiao Yang, Yundeng Yu, HongBin Zhang, Chihang Jiang, Jielan Jiang, Yang Liu, Xiuli Wang. Comparative Transcriptomic Analysis of the Brain in Takifugu Rubripes Shows Its Tolerance to Acute Hypoxia. . 2021; ():1.
Chicago/Turabian StyleMingxiu Bao; Fengqin Shang; Fujun Liu; Ziwen Hu; Shengnan Wang; Xiao Yang; Yundeng Yu; HongBin Zhang; Chihang Jiang; Jielan Jiang; Yang Liu; Xiuli Wang. 2021. "Comparative Transcriptomic Analysis of the Brain in Takifugu Rubripes Shows Its Tolerance to Acute Hypoxia." , no. : 1.
Fish community structure (FCS) of the Yellow Sea (YS) is affected by multiple pressures. Quantifying the responses of indicators of FCS (IFCSs) to pressures is a key aspect of ecosystem-based fisheries management. Quantitative methodology has hitherto been rarely applied to evaluate the performance of ecological indicators in response to physical and anthropogenic pressures and management actions. In this study, we adopted a quantitative and flexible framework to quantify the performance of IFCSs in the YS as well as to identify a suite of operational IFCSs to evaluate the status of the FCS via two state-space approaches. A total of 22 IFCSs were tested for their responses to three types of pressures including anthropogenic activities (fishing), large-scale climate change, and regional environmental variables. Our results indicate that the majority of IFCSs have good performance in terms of sensitivity in their responses to pressures, but weak performance in terms of robustness. The IFCSs tend to respond stronger to fishing than to large-scale climatic indices and regional environmental indices both in terms of sensitivity and robustness. A final indicator suite of five best-performing IFCSs was identified. The five IFCSs include total catch (ToC), mean trophic level (MTL), the ratio of catch of large predatory groups to total catch (LPC/ToC), mean temperature of catch (MTC) [or alternatively catch of small pelagic groups (SPC)], and functional evenness based on thermal groups (T-J′FD), all of which show regime shift patterns consistent with climate change. Compared to a reference period (1960–1964), the status of the current FCS has been obviously changed, and the long-term trajectories of the final indicator suite is consistent with that of fishing pressure. This study demonstrates the applicability of the indicator-testing framework in appraising the status of FCS, and facilitates moving towards ecosystem-based fisheries management in the YS.
Yuru Li; Shuyang Ma; Caihong Fu; Yongjun Tian; Jianchao Li; Peng Sun; Zhenjiang Ye; Yang Liu. Appraising the Status of Fish Community Structure in the Yellow Sea Based on an Indicator-Testing Framework. Frontiers in Marine Science 2021, 8, 1 .
AMA StyleYuru Li, Shuyang Ma, Caihong Fu, Yongjun Tian, Jianchao Li, Peng Sun, Zhenjiang Ye, Yang Liu. Appraising the Status of Fish Community Structure in the Yellow Sea Based on an Indicator-Testing Framework. Frontiers in Marine Science. 2021; 8 ():1.
Chicago/Turabian StyleYuru Li; Shuyang Ma; Caihong Fu; Yongjun Tian; Jianchao Li; Peng Sun; Zhenjiang Ye; Yang Liu. 2021. "Appraising the Status of Fish Community Structure in the Yellow Sea Based on an Indicator-Testing Framework." Frontiers in Marine Science 8, no. : 1.
The green mussel (Perna viridis) is one of the most commercially-important cultured species along the coast of Thailand. In this study, a suitable aquaculture site-selection model (SASSM) was developed to identify the most suitable areas in the inner part of the Gulf of Thailand (InnerGoT) for green mussel culture. Satellite-derived chlorophyll-a (Chl-a) and hydrodynamic model outputs for sea surface temperature (SST), salinity, maximum water current (MWC), and bathymetry between 2018 and 2019 were used as input to the SASSM. The results show that suitability scores in mussel aquaculture areas were lowest (1–3) during the Southwest (SW) monsoon, rainy season (July–August), and highest (6–7) during the Northeast (NE) monsoon, cold season (November–December). Moderate suitability scores (4–5) were obtained during the monsoon transition from the NE monsoon to the SW monsoon, summer (April–May). The study area was further divided into three zones: the western, central, and eastern regions. The western and eastern parts showed high suitability scores (5–7) while the central zone exhibited low suitability scores (2–4). The model results show a similar pattern to the actual mussel production in the study area. Seasonal events (i.e., flood and dry seasons) were incorporated into the model to examine the seasonal effects on the suitable mussel aquaculture areas. The suitability scores during the SW monsoon in 2018 were more sensitive to changes in SST and salinity relative to 2019. The higher freshwater discharge and lower temperature in 2018 relative to 2019 resulted in the accrual of suitable aquaculture areas. This pattern is consistent with the productions of the green mussel, where higher production was recorded in 2018 (2002.5 t) than in 2019 (410.8 t). However, correlations among atmospheric (air temperature, rainfall, and wind) and oceanographic factors (SST and MWC) were significant in the western and central regions, suggesting that the suitability of green mussel aquaculture in these regions is vulnerable to environmental disturbances. Thus, the SASSM can be a powerful tool in providing useful information on spatial management for marine aquaculture in environmentally-dynamic coastal systems.
Hathaichanok Kumgumpol; Yang Liu; Tanuspong Pokavanich; Irene Alabia; Zixu Yin; Sei-Ichi Saitoh; Yongjun Tian. Environmental Habitat Mapping of Green Mussel: A GIS-Based Approach for Sustainable Aquaculture in the Inner Gulf of Thailand. Sustainability 2020, 12, 10643 .
AMA StyleHathaichanok Kumgumpol, Yang Liu, Tanuspong Pokavanich, Irene Alabia, Zixu Yin, Sei-Ichi Saitoh, Yongjun Tian. Environmental Habitat Mapping of Green Mussel: A GIS-Based Approach for Sustainable Aquaculture in the Inner Gulf of Thailand. Sustainability. 2020; 12 (24):10643.
Chicago/Turabian StyleHathaichanok Kumgumpol; Yang Liu; Tanuspong Pokavanich; Irene Alabia; Zixu Yin; Sei-Ichi Saitoh; Yongjun Tian. 2020. "Environmental Habitat Mapping of Green Mussel: A GIS-Based Approach for Sustainable Aquaculture in the Inner Gulf of Thailand." Sustainability 12, no. 24: 10643.
Climate‐induced nonlinearity in biological variability and non‐stationary relationships with physical drivers are crucial to understand responses of marine organisms to climate variability. These phenomena have raised concerns in the northeastern North Pacific, but are out of the spotlight in the northwestern North Pacific in spite of potential implications for this productive system under increased climate variability. Pelagic communities in the Kuroshio ecosystem have both ecological and economic importance. However, patterns of climate‐induced nonlinearity in pelagic communities are not well understood, and existence of non‐stationarity in their relationships with physical drivers remains obscure. Here, we compile large numbers of climatic, oceanic and biological long‐term time‐series data and employ diverse statistical techniques to reveal such climate‐induced nonlinearity and non‐stationarity. Results show that pelagic communities in the Tsushima and Pacific areas (major areas in the Kuroshio ecosystem) had regime shifts in the late 1990s and late 1980s, respectively. Winter sea surface temperatures in the Kuroshio Current path and in the eastern part of East China Sea, which are respectively affected by the Kuroshio Current and Siberian High, correlate with dominant variability patterns in their pelagic communities. Furthermore, non‐stationarity was identified with threshold years in the 1990s in the Tsushima area and in the 1980s in the Pacific area as a possible result of the declined variances in the Siberian High and Aleutian Low, respectively. Our findings provide insights on spatial differentiation of climate‐induced nonlinearity and non‐stationarity, which are valuable for the management of pelagic communities in the northwestern North Pacific under changing climatic conditions.
Shuyang Ma; Yongjun Tian; Caihong Fu; Haiqing Yu; Jianchao Li; Yang Liu; Jiahua Cheng; Rong Wan; Yoshiro Watanabe. Climate‐induced nonlinearity in pelagic communities and non‐stationary relationships with physical drivers in the Kuroshio ecosystem. Fish and Fisheries 2020, 22, 1 -17.
AMA StyleShuyang Ma, Yongjun Tian, Caihong Fu, Haiqing Yu, Jianchao Li, Yang Liu, Jiahua Cheng, Rong Wan, Yoshiro Watanabe. Climate‐induced nonlinearity in pelagic communities and non‐stationary relationships with physical drivers in the Kuroshio ecosystem. Fish and Fisheries. 2020; 22 (1):1-17.
Chicago/Turabian StyleShuyang Ma; Yongjun Tian; Caihong Fu; Haiqing Yu; Jianchao Li; Yang Liu; Jiahua Cheng; Rong Wan; Yoshiro Watanabe. 2020. "Climate‐induced nonlinearity in pelagic communities and non‐stationary relationships with physical drivers in the Kuroshio ecosystem." Fish and Fisheries 22, no. 1: 1-17.
Water temperature and food availability are two environmental factors that are widely considered to be likely determinants of recruitment success of fish stocks. However, marine environmental data are commonly of limited availability. Moreover, the mechanisms by which environmental variations may act to regulate fish recruitment remain incompletely understood, especially from the point of view of prey availability. Here we report a test of the feasibility of using simulated long-term hindcast of marine environmental data based on a physical and lower-trophic-level ecosystem data-assimilative model to investigate the impacts of water temperature and prey availability on recruitment fluctuations of the Japanese anchovy (Engraulis japonicus) in the Yellow Sea. Although observational data available for model validation were limited, the model reasonably reproduced inter-annual fluctuations of phytoplankton abundance. The model results for a 15-year period (1987–2001) indicated Japanese anchovy recruitment to have been negatively correlated with July sea surface temperature in the traditional spawning ground south of the Shandong Peninsula, while being positively correlated with near-surface biomass of small zooplankton (the predominant prey for anchovy larvae) in the central Yellow Sea during the summer period. These findings imply that the Japanese anchovy recruitment in the Yellow Sea is likely regulated during its early life stages by both water temperature and food availability. The negative temperature-recruitment relationship could be explained by the “spawning temperature optima” and “optimal growth temperature” hypotheses. Furthermore, model results indicated that inter-annual variation in the near-surface biomass of small zooplankton in the central Yellow Sea during summer is mainly regulated by nutrient supply, to which both vertical stratification and horizontal advection may make contributions.
Haiqing Yu; Huaming Yu; Shin-Ichi Ito; Yongjun Tian; Hui Wang; Yang Liu; Qinwang Xing; Andrew Bakun; Ryan M. Kelly. Potential environmental drivers of Japanese anchovy (Engraulis japonicus) recruitment in the Yellow Sea. Journal of Marine Systems 2020, 212, 103431 .
AMA StyleHaiqing Yu, Huaming Yu, Shin-Ichi Ito, Yongjun Tian, Hui Wang, Yang Liu, Qinwang Xing, Andrew Bakun, Ryan M. Kelly. Potential environmental drivers of Japanese anchovy (Engraulis japonicus) recruitment in the Yellow Sea. Journal of Marine Systems. 2020; 212 ():103431.
Chicago/Turabian StyleHaiqing Yu; Huaming Yu; Shin-Ichi Ito; Yongjun Tian; Hui Wang; Yang Liu; Qinwang Xing; Andrew Bakun; Ryan M. Kelly. 2020. "Potential environmental drivers of Japanese anchovy (Engraulis japonicus) recruitment in the Yellow Sea." Journal of Marine Systems 212, no. : 103431.
Largehead hairtail (Trichiurus japonicus ) in the China Seas shows an increasing catch trend, despite continued overexploitation, which could be attributed to improved recruitment as a result of strengthened early growth. To understand the early growth variability of largehead hairtail, we examined the linkages between early growth, as revealed by otolith microstructure, and the associated environmental variables over both spatial and temporal scales. Young‐of‐the‐Year largehead hairtail were collected from three regions in the Bohai, Yellow and East China Seas between 29° and 39° N. Daily increment widths of sagittal otoliths were measured and used as a proxy for somatic growth. We found two spawning cohorts, Spring‐ and Summer‐spawned cohorts, that showed latitudinal differences in both mean growth and growth pattern. The transition time from larval to juvenile stage was identified at around 40 days. Daily increment widths of two cohorts showed similar growth pattern in the first 40 days, while location had a marked effect on daily growth over 41–110 days. This suggests physiologically constrained growth pattern in larval stage, but more plastic growth subject to habitat‐specific influences in juvenile stage. The gradient forest analysis identified sea bottom temperature, vertical temperature gradient, and sea surface salinity, as the most important variables in determining early growth. Latitudinal differences in early growth pattern and their response to environmental variables suggest adaptive plasticity of early growth, which has notable implication for the management and sustainable utilization of this important but heavily exploited resource in the China Seas.
Peng Sun; Qi Chen; Caihong Fu; Yi Xu; Runlong Sun; Jianchao Li; Haiqing Yu; Chi Zhang; Yang Liu; Zhenjiang Ye; Yongjun Tian; Mikko Heino. Latitudinal differences in early growth of largehead hairtail ( Trichiurus japonicus ) in relation to environmental variables. Fisheries Oceanography 2020, 29, 470 -483.
AMA StylePeng Sun, Qi Chen, Caihong Fu, Yi Xu, Runlong Sun, Jianchao Li, Haiqing Yu, Chi Zhang, Yang Liu, Zhenjiang Ye, Yongjun Tian, Mikko Heino. Latitudinal differences in early growth of largehead hairtail ( Trichiurus japonicus ) in relation to environmental variables. Fisheries Oceanography. 2020; 29 (6):470-483.
Chicago/Turabian StylePeng Sun; Qi Chen; Caihong Fu; Yi Xu; Runlong Sun; Jianchao Li; Haiqing Yu; Chi Zhang; Yang Liu; Zhenjiang Ye; Yongjun Tian; Mikko Heino. 2020. "Latitudinal differences in early growth of largehead hairtail ( Trichiurus japonicus ) in relation to environmental variables." Fisheries Oceanography 29, no. 6: 470-483.
The distribution and fluctuations in abundance of small pelagic species such as anchovy are largely affected by climate change. We hypothesized that the future projected rise in temperature will result to a northward shift of Japanese anchovy (Engraulis japonicus) habitat and a subsequent increase in relative abundance. To test this hypothesis, we explored the link between Japanese anchovy abundance and environmental conditions using machine-learning and statistical models. The models were fitted with catch per unit effort (CPUE) as the response variable and remotely sensed data of sea surface temperature (SST), sea surface chlorophyll-a (Chl-a), assimilated information of sea surface salinity (SSS), meridional and zonal ocean currents, and depth as environmental covariates. Our results showed that the abundance of E. japonicus was significantly influenced by environmental factors. In particular, salinity front and SST highlight strong relationships with winter CPUE distribution. Based on these models, the results reinforced our hypothesis and showed that the warming ocean will drive a substantial shift in Japanese anchovy habitat in the China seas. SST and CPUE showed negative correlations with the El Niño Southern Oscillation (ENSO) index. These findings underpin ramifications of the climate-driven habitat shift of small pelagic fish species on the regional marine ecosystem in the China seas.
Shuhao Liu; Yang Liu; Irene D. Alabia; Yongjun Tian; Zhenjiang Ye; Haiqing Yu; Jianchao Li; Jiahua Cheng. Impact of Climate Change on Wintering Ground of Japanese Anchovy (Engraulis japonicus) Using Marine Geospatial Statistics. Frontiers in Marine Science 2020, 7, 1 .
AMA StyleShuhao Liu, Yang Liu, Irene D. Alabia, Yongjun Tian, Zhenjiang Ye, Haiqing Yu, Jianchao Li, Jiahua Cheng. Impact of Climate Change on Wintering Ground of Japanese Anchovy (Engraulis japonicus) Using Marine Geospatial Statistics. Frontiers in Marine Science. 2020; 7 ():1.
Chicago/Turabian StyleShuhao Liu; Yang Liu; Irene D. Alabia; Yongjun Tian; Zhenjiang Ye; Haiqing Yu; Jianchao Li; Jiahua Cheng. 2020. "Impact of Climate Change on Wintering Ground of Japanese Anchovy (Engraulis japonicus) Using Marine Geospatial Statistics." Frontiers in Marine Science 7, no. : 1.
The waters around Taiwan are impacted by the Kuroshio and coastal currents, resulting in a high productivity and a high diversity of marine life. As a consequence, there are a multitude of fisheries around Taiwan, conducted by a fleet that has grown enormously in the last four decades. Here, we investigate the effect of the resulting fishing pressure on 16 commercial fish stocks including demersal and pelagic species in the coastal and offshore waters of Taiwan using the Monte Carlo Catch-Maximum Sustainable Yield (CMSY) and Bayesian Schaefer Model (BSM) methods. Both of these methods required principally catch time series, with the BSM methods also requiring catch-per-unit-of-effort data. The results show that of the 16 assessed stocks, 10 stocks have collapsed, 2 are severely overfished, 2 are overfished, 1 is slightly overfished, and only 1 stock remains in a healthy status; these troubling results are attributed to excessive fishing pressure. However, climate-driven environmental variability may be another factor affecting the fishery resources around Taiwan, as evidenced by chub mackerel Scomber japonicus, the one stock deemed healthy, which is here attributed to favorable environmental condition. Using the fisheries reference points provided here, rebuilding plans could be provided for the other 15 species; however, such plans are not likely to be successful without reducing the size of the Taiwanese fishing fleet.
Peilong Ju; Yongjun Tian; Mingru Chen; Shengyun Yang; Yang Liu; Qinwang Xing; Peng Sun. Evaluating Stock Status of 16 Commercial Fish Species in the Coastal and Offshore Waters of Taiwan Using the CMSY and BSM Methods. Frontiers in Marine Science 2020, 7, 1 .
AMA StylePeilong Ju, Yongjun Tian, Mingru Chen, Shengyun Yang, Yang Liu, Qinwang Xing, Peng Sun. Evaluating Stock Status of 16 Commercial Fish Species in the Coastal and Offshore Waters of Taiwan Using the CMSY and BSM Methods. Frontiers in Marine Science. 2020; 7 ():1.
Chicago/Turabian StylePeilong Ju; Yongjun Tian; Mingru Chen; Shengyun Yang; Yang Liu; Qinwang Xing; Peng Sun. 2020. "Evaluating Stock Status of 16 Commercial Fish Species in the Coastal and Offshore Waters of Taiwan Using the CMSY and BSM Methods." Frontiers in Marine Science 7, no. : 1.
Larval retention has been recognized as a key factor/process affecting the recruitment of many pelagic fish species and detection of the larval retention areas (LRAs) is thus of crucial importance for studies of both recruitment dynamics and of fisheries management. However, most studies in relation to larval retention have adopted either retention rate or time to represent retention level. In this study, a newly developed approach based on a Lagrangian particle-tracking algorithm coupled with a hydrodynamic model, thereby jointly considering both retention rate and time to quantify larvae retention level, was introduced and used to identify the prominent LRAs for Japanese anchovy Engraulis japonicus in the Yellow Sea. Four prominent LRAs were identified, two of which locating in the Southern Yellow Sea match well with the aggregation of Japanese anchovy larvae found in previous field surveys. The spatial–temporal variation of instantaneous retention rate was further analyzed and the contribution rates of spawning grounds to LRAs as well as sensitivity of pelagic larval duration to the LRAs were investigated. Meanwhile, the LRAs defined in this study can be also used to explain the aggregations of microzooplankton and green algae in the southern part of the Yellow Sea. This approach can be widely applied to other pelagic species during their planktonic stages, which may further provide implications for studies on recruitment dynamics and on marine protected areas (MPAs) in the Yellow Sea as well as in other continental shelf regions containing abundant fishery resources.
Qinwang Xing; Huaming Yu; Haiqing Yu; Peng Sun; Yang Liu; Zhenjiang Ye; Jianchao Li; Yongjun Tian. A comprehensive model-based index for identification of larval retention areas: A case study for Japanese anchovy Engraulis japonicus in the Yellow Sea. Ecological Indicators 2020, 116, 106479 .
AMA StyleQinwang Xing, Huaming Yu, Haiqing Yu, Peng Sun, Yang Liu, Zhenjiang Ye, Jianchao Li, Yongjun Tian. A comprehensive model-based index for identification of larval retention areas: A case study for Japanese anchovy Engraulis japonicus in the Yellow Sea. Ecological Indicators. 2020; 116 ():106479.
Chicago/Turabian StyleQinwang Xing; Huaming Yu; Haiqing Yu; Peng Sun; Yang Liu; Zhenjiang Ye; Jianchao Li; Yongjun Tian. 2020. "A comprehensive model-based index for identification of larval retention areas: A case study for Japanese anchovy Engraulis japonicus in the Yellow Sea." Ecological Indicators 116, no. : 106479.
The assessment of extreme weather events on suitable sites for aquaculture could help in establishing sustainable coastal environmental resource management. Japanese scallop culture is an economically important marine farming activity in the coastal communities of Shandong, China and Funka Bay, Japan. In this study, we improved the suitable aquaculture site-selection model (SASSM) by using Geostationary Ocean Color Imager (GOCI) data instead of Moderate Resolution Imaging Spectroradiometer (MODIS) data, as a complementary source for higher temporal and spatial resolution data that are useful for monitoring fine-scale coastal and oceanic processes. We also applied the newly developed SASSM to the Japanese scallop production site along the Shandong coast. Finally, we analyzed the correlations between environmental factors (chlorophyll a concentration, sea surface temperature (SST), and total suspended sediment), meteorological factors (precipitation, temperature, and wind), and climatic events (winter East Asian monsoon (EAM) and El Niño/La Niña Southern Oscillation), and the impacts of climate events on suitable zones for scallop aquaculture. The new SASSM maps show that GOCI products have the potential for oceanographic investigations in Shandong, China and Funka Bay, Japan. Our results highlighted higher aquaculture site suitability for scallop in Funka Bay than in Shandong coast. During the winter with a strong EAM (2011), the suitable area for Japanese scallop aquaculture increased. Conversely, in the winter during a strong El Niño (2016), we found fewer areas that were highly suitable for scallop aquaculture in Funka Bay. SST was extremely low in Funka Bay during spring and summer 2017, which caused fewer highly suitable areas (scores of 7 and 8) for scallop aquaculture relative to other years. These findings suggest that extreme climatic events significantly impact the availability of suitable sites for marine farming and thus, should be considered in the development and design of coastal aquaculture sites.
Yang Liu; Yongjun Tian; Sei-Ichi Saitoh; Irene D. Alabia; Kan-Ichiro Mochizuki. Impact of Climate Extremes on Suitability Dynamics for Japanese Scallop Aquaculture in Shandong, China and Funka Bay, Japan. Sustainability 2020, 12, 833 .
AMA StyleYang Liu, Yongjun Tian, Sei-Ichi Saitoh, Irene D. Alabia, Kan-Ichiro Mochizuki. Impact of Climate Extremes on Suitability Dynamics for Japanese Scallop Aquaculture in Shandong, China and Funka Bay, Japan. Sustainability. 2020; 12 (3):833.
Chicago/Turabian StyleYang Liu; Yongjun Tian; Sei-Ichi Saitoh; Irene D. Alabia; Kan-Ichiro Mochizuki. 2020. "Impact of Climate Extremes on Suitability Dynamics for Japanese Scallop Aquaculture in Shandong, China and Funka Bay, Japan." Sustainability 12, no. 3: 833.
Euryhaline teleosts can survive in a wide salinity range via alteration of the molecular mechanisms to maintain internal ionic and osmotic balance in osmoregulatory organs such as gill,kidney and intestine. Na+/K+-ATPase (NKA), plays a crucial role in sustaining intracellular homeostasis and is characterized by association of multiple isoforms of α- and β-subunits. To gain insight into the potential function of nka genes in salinity adaptation, 5 nkaα genes (nkaα1a, nkaα1b, nkaα2, nkaα3a, nkaα3b) and 7 nkaβ genes (nkaβ1a, nkaβ1b, nkaβ2a, nkaβ2b, nkaβ3a, nkaβ3b and nkaβ4) were identified from transcriptomic and genomic databases of Lateolabrax maculatus. The annotation and evolutionary footprint of these nka genes was revealed via the analysis of phylogenetic tree, gene synteny, copy numbers, exon-intron structures and motif compositions. The expressions of 12 nka genes in spotted sea bass was tested in ten tissues (kidney, gonad, stomach, intestine, gill, muscle, heart, spleen, liver and brain) and 6 genes (nkaα1a, nkaα1b, nkaα3a, nkaα3b, nkaβ1b and nkaβ2a) showed high expression in osmoregulatory organs. Furthermore, the responses of NKA and potential salinity-sensitive nka genes were examined under different salinity treatment (0 ppt, 12 ppt, 30 ppt, 45 ppt). Results showed that the enzyme activity of NKA was highest in gill and exhibited salinity dependent variation, with the highest activity identified in 45 ppt. Different nkaα/β-isoforms showed their diverse responses to salinity changes and the expression of nka genes including nkaα1a, nkaα3b, nkaβ1b in gill, nkaα3a in kidney and nkaβ2a in intestine were transcriptionally regulated by altered salinity. Notably, the expression patterns of nkaα1a and nkaβ1b in gill showed similar variation trend with NKA activity, suggesting that nkaα1a/β1b could be the major function isoforms involved in primary ion transport during salinity adaptation. Our results provided insights into the roles of nkas in osmotic regulation and a theoretical basis for future studies that focus on detailed molecular mechanisms in salinity adaptation of euryhaline teleosts.
Xiaoyan Zhang; Haishen Wen; Xin Qi; Kaiqiang Zhang; Yang Liu; Hongying Fan; Peng Yu; Yuan Tian; Yun Li. Na+-K+-ATPase and nka genes in spotted sea bass (Lateolabrax maculatus) and their involvement in salinity adaptation. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 2019, 235, 69 -81.
AMA StyleXiaoyan Zhang, Haishen Wen, Xin Qi, Kaiqiang Zhang, Yang Liu, Hongying Fan, Peng Yu, Yuan Tian, Yun Li. Na+-K+-ATPase and nka genes in spotted sea bass (Lateolabrax maculatus) and their involvement in salinity adaptation. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology. 2019; 235 ():69-81.
Chicago/Turabian StyleXiaoyan Zhang; Haishen Wen; Xin Qi; Kaiqiang Zhang; Yang Liu; Hongying Fan; Peng Yu; Yuan Tian; Yun Li. 2019. "Na+-K+-ATPase and nka genes in spotted sea bass (Lateolabrax maculatus) and their involvement in salinity adaptation." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 235, no. : 69-81.
The distribution, putative function and polymorphism characteristics of simple sequence repeats (SSRs) in P. yezoensis transcriptome were analyzed in this study. In tota., 307. SSRs were detected among 2681 unigenes. Trinucleotide types were dominant, constituting 91.87% of all the microsatellites. The most abundant SSR was CCG (71.03%) and the second abundant one was AGC (234, 7.61%). A total of 111 (3.61%) dinucleotide types were found and the most abundant one was AC (51, 1.66%) which was followed by CG (34, 1.11%). SSRs identified showed a GC bases preference; GC bases constituted 89.73% of all the SSR bases. SSRs occurrence number decreased as repetitions increased. Annotation results exhibited that the majority of SSRs-containing unigenes have the functions of ‘metabolic process’, ‘binding’ and ‘catalytic activity’ and existed as the forms of ‘cell’, ‘cell component’ and ‘organelle’. The dominant amino acids that SSRs coded were Ala (28.59%), Arg (26.02%), Gly (14.35%) and Pro (13.65%). Amplification results showed that 3 out 23 SSRs from transcriptome (13.04%) and 8 out 77 SSRs from genome (10.39%) were polymorphic.
Yang Liu; Xue Pan; Kuipeng Xu; Yunxiang Mao. Distribution, Function and Polymorphism Characteristics of Microsatellites in Pyropia yezoensis Transcriptome. Journal of Ocean University of China 2019, 18, 693 -700.
AMA StyleYang Liu, Xue Pan, Kuipeng Xu, Yunxiang Mao. Distribution, Function and Polymorphism Characteristics of Microsatellites in Pyropia yezoensis Transcriptome. Journal of Ocean University of China. 2019; 18 (3):693-700.
Chicago/Turabian StyleYang Liu; Xue Pan; Kuipeng Xu; Yunxiang Mao. 2019. "Distribution, Function and Polymorphism Characteristics of Microsatellites in Pyropia yezoensis Transcriptome." Journal of Ocean University of China 18, no. 3: 693-700.
The tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation (14-3-3) proteins are a group of highly conserved homologous and heterologous proteins involved in a wild range of physiological processes, including the regulation of many molecular phenomena under different environmental salinities. In this study, we identified eleven 14-3-3 genes from the spotted sea bass (Lateolabrax maculatus) genome and transcriptomic databases and verified their identities by conducting phylogenetic, syntenic and gene structure analyses. The spotted sea bass 14-3-3 genes are highly conserved based on sequence alignment, conserved domains and motifs, and tertiary structural feature. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis of 14-3-3 genes in gill of spotted sea bass under normal physiological conditions indicated that the expression level of 14-3-3 zeta was the highest among tested genes, followed by 14-3-3 theta. Furthermore, expression profiles of 14-3-3 genes in gill tissue (in vivo and in vitro) indicated that the 14-3-3 zeta and 14-3-3 theta genes were significantly induced by different environmental salinities in spotted sea bass, suggesting their potential involvement in response to salinity challenge. Our findings may lay the foundation for future functional studies on the 14-3-3 gene family in euryhaline teleosts.
Kai-Qiang Zhang; Hai-Shen Wen; Ji-Fang Li; Xin Qi; Hong-Ying Fan; Xiao-Yan Zhang; Yuan Tian; Yang Liu; Hao-Long Wang; Yun Li. 14-3-3 gene family in spotted sea bass (Lateolabrax maculatus): Genome-wide identification, phylogenetic analysis and expression profiles after salinity stress. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 2019, 235, 1 -11.
AMA StyleKai-Qiang Zhang, Hai-Shen Wen, Ji-Fang Li, Xin Qi, Hong-Ying Fan, Xiao-Yan Zhang, Yuan Tian, Yang Liu, Hao-Long Wang, Yun Li. 14-3-3 gene family in spotted sea bass (Lateolabrax maculatus): Genome-wide identification, phylogenetic analysis and expression profiles after salinity stress. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology. 2019; 235 ():1-11.
Chicago/Turabian StyleKai-Qiang Zhang; Hai-Shen Wen; Ji-Fang Li; Xin Qi; Hong-Ying Fan; Xiao-Yan Zhang; Yuan Tian; Yang Liu; Hao-Long Wang; Yun Li. 2019. "14-3-3 gene family in spotted sea bass (Lateolabrax maculatus): Genome-wide identification, phylogenetic analysis and expression profiles after salinity stress." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 235, no. : 1-11.
Located at the margin of the Northwest Pacific Ocean, the Yellow Sea (YS) and East China Sea (ECS) marine ecosystems are mainly influenced by the Kuroshio and its branches. In addition to decadal changes in their marine environments, the YS and ECS have been impacted by intensive fishing at both the species- and community-levels, leading to over-exploitation of commercial species and changes in species composition and trophic structure. The dual effects of overfishing and climate change on the variability and processes of the YS and ECS ecosystem structure and functions are not well understood. In this study, we have compiled biological and physical time series, including 147 taxa catches, 7 local-scale environmental variables and 8 large-scale climate indices, to explore variations in ecosystem structure, and to elucidate the effects of climate change on the two regions during the period 1950-2014. Aside from fishing impacts, results show that decadal variations occurred in both the YS and ECS, with step-like changes around the mid-1960s, mid-1970s, late 1980s and late 1990s. These changes correspond well with contemporaneous climatic regime shifts in the Pacific. Climate-induced changing patterns are also evident in different fish communities, with diverse sensitivities in response to these patterns. Increasing water temperature exhibits greater effects on cold-water group than on temperate- and warm-water groups. Functional and thermal groups both show pronounced linkages with fishing effort and physical drivers, particularly with local-scale environmental variables, which highlights the importance of fishing and the validity of biological grouping in future investigation of environmental impacts on marine organisms. Our results provide evidences for climate-induced variations in over-exploited marine ecosystems and coupled “Atmosphere-Ocean-Ecosystem” influencing processes, which have important implications for ecosystem-based fisheries management in the YS and ECS.
Shuyang Ma; Yang Liu; Jianchao Li; Caihong Fu; Zhenjiang Ye; Peng Sun; Haiqing Yu; Jiahua Cheng; Yongjun Tian. Climate-induced long-term variations in ecosystem structure and atmosphere-ocean-ecosystem processes in the Yellow Sea and East China Sea. Progress in Oceanography 2019, 175, 183 -197.
AMA StyleShuyang Ma, Yang Liu, Jianchao Li, Caihong Fu, Zhenjiang Ye, Peng Sun, Haiqing Yu, Jiahua Cheng, Yongjun Tian. Climate-induced long-term variations in ecosystem structure and atmosphere-ocean-ecosystem processes in the Yellow Sea and East China Sea. Progress in Oceanography. 2019; 175 ():183-197.
Chicago/Turabian StyleShuyang Ma; Yang Liu; Jianchao Li; Caihong Fu; Zhenjiang Ye; Peng Sun; Haiqing Yu; Jiahua Cheng; Yongjun Tian. 2019. "Climate-induced long-term variations in ecosystem structure and atmosphere-ocean-ecosystem processes in the Yellow Sea and East China Sea." Progress in Oceanography 175, no. : 183-197.
Sex determination mechanisms in teleost fish broadly differ from mammals and birds, with sex chromosomes that are far less differentiated and recombination often occurring along the length of the X and Y chromosomes, posing major challenges for the identification of specific sex determination genes. Here, we take an innovative approach of comparative genome analysis of the genomic sequences of the X chromosome and newly sequenced Y chromosome in the channel catfish. Using a YY channel catfish as the sequencing template, we generated, assembled, and annotated the Y genome sequence of channel catfish. The genome sequence assembly had a contig N50 size of 2.7 Mb and a scaffold N50 size of 26.7 Mb. Genetic linkage and GWAS analyses placed the sex determination locus within a genetic distance less than 0.5 cM and physical distance of 8.9 Mb. However, comparison of the channel catfish X and Y chromosome sequences showed no sex-specific genes. Instead, comparative RNA-Seq analysis between females and males revealed exclusive sex-specific expression of an isoform of the breast cancer anti-resistance 1 (BCAR1) gene in the male during early sex differentiation. Experimental knockout of BCAR1 gene converted genetic males (XY) to phenotypic females, suggesting BCAR1 as a putative sex determination gene. We present the first Y chromosome sequence among teleost fish, and one of the few whole Y chromosome sequences among vertebrate species. Comparative analyses suggest that sex-specific isoform expression through alternative splicing may underlie sex determination processes in the channel catfish, and we identify BCAR1 as a potential sex determination gene.
Lisui Bao; Changxu Tian; Shikai Liu; Yu Zhang; Ahmed Elaswad; Zihao Yuan; Karim Khalil; Fanyue Sun; Yujia Yang; Tao Zhou; Ning Li; Suxu Tan; Qifan Zeng; Yang Liu; Yueru Li; Yun Li; Dongya Gao; Rex Dunham; Kenneth Davis; Geoffrey Waldbieser; Zhanjiang Liu. The Y chromosome sequence of the channel catfish suggests novel sex determination mechanisms in teleost fish. BMC Biology 2019, 17, 1 -16.
AMA StyleLisui Bao, Changxu Tian, Shikai Liu, Yu Zhang, Ahmed Elaswad, Zihao Yuan, Karim Khalil, Fanyue Sun, Yujia Yang, Tao Zhou, Ning Li, Suxu Tan, Qifan Zeng, Yang Liu, Yueru Li, Yun Li, Dongya Gao, Rex Dunham, Kenneth Davis, Geoffrey Waldbieser, Zhanjiang Liu. The Y chromosome sequence of the channel catfish suggests novel sex determination mechanisms in teleost fish. BMC Biology. 2019; 17 (1):1-16.
Chicago/Turabian StyleLisui Bao; Changxu Tian; Shikai Liu; Yu Zhang; Ahmed Elaswad; Zihao Yuan; Karim Khalil; Fanyue Sun; Yujia Yang; Tao Zhou; Ning Li; Suxu Tan; Qifan Zeng; Yang Liu; Yueru Li; Yun Li; Dongya Gao; Rex Dunham; Kenneth Davis; Geoffrey Waldbieser; Zhanjiang Liu. 2019. "The Y chromosome sequence of the channel catfish suggests novel sex determination mechanisms in teleost fish." BMC Biology 17, no. 1: 1-16.
A full-length cDNA encoding phosphatidylinositol 3-kinase regulatory subunit gamma b gene in Nile tilapia (Oreochromis niloticus), termed as On-pik3r3b, was identified and characterized in this study. The sequence analysis demonstrated that the full-length cDNA of On-pik3r3b was 2018 bp, containing a 5′ untranslated region (UTR) of 171 bp, an open reading frame (ORF) of 1422 bp and a 3’ UTR of 425 bp. Its protein sequence displayed a high degree of identity with other fish. Using qPCR, the expression patterns of On-pik3r3b were investigated. In healthy Nile tilapia, the transcripts of On-pik3r3b were detected in all examined tissues, except the skin. Upon the stimulation with Streptococcus agalactiae, the On-pik3r3b expression level in liver, spleen, kidney and gill were significantly increased at 12 h after infection. The recombinant On-pik3r3b showed wide spectrum of antibacterial activity in vitro, especially against S. agalactiae. Our observation strongly indicates that On-pik3r3b is involved in the innate immune response in Nile tilapia.
Liang Meng; Wen-Teng Xu; Ya-Dong Chen; Min Wei; Zhong-Kai Cui; Yang Liu; Hua Guo; Xi Gan; Jia-Jie Zhu; Lin-Na Wang; Song-Lin Chen. pik3r3b, a novel immune-related gene in Nile tilapia (Oreochromis niloticus): Identification, expression and analysis of antibacterial activity. Fish & Shellfish Immunology 2019, 87, 705 -713.
AMA StyleLiang Meng, Wen-Teng Xu, Ya-Dong Chen, Min Wei, Zhong-Kai Cui, Yang Liu, Hua Guo, Xi Gan, Jia-Jie Zhu, Lin-Na Wang, Song-Lin Chen. pik3r3b, a novel immune-related gene in Nile tilapia (Oreochromis niloticus): Identification, expression and analysis of antibacterial activity. Fish & Shellfish Immunology. 2019; 87 ():705-713.
Chicago/Turabian StyleLiang Meng; Wen-Teng Xu; Ya-Dong Chen; Min Wei; Zhong-Kai Cui; Yang Liu; Hua Guo; Xi Gan; Jia-Jie Zhu; Lin-Na Wang; Song-Lin Chen. 2019. "pik3r3b, a novel immune-related gene in Nile tilapia (Oreochromis niloticus): Identification, expression and analysis of antibacterial activity." Fish & Shellfish Immunology 87, no. : 705-713.
Walking catfish (Clarias batrachus) is a freshwater fish capable of air-breathing and locomotion on land. It usually inhabits various low-oxygen habitats, burrows inside the mudflat, and sometimes “walks” to search for suitable environments during summer. It has evolved accessory air-breathing organs for respiring air and corresponding mechanisms to survive in such challenging environments. Thereby, it serves as a great model for understanding adaptations to terrestrial life. Comparative genomics with channel catfish (Ictalurus punctatus) revealed specific adaptations of C. batrachus in DNA repair, enzyme activator activity, and small GTPase regulator activity. Comparative analysis with 11 non-air-breathing fish species suggested adaptive evolution in gene expression and nitrogenous waste metabolic processes. Further, myoglobin, olfactory receptor related to class A G protein-coupled receptor 1, and sulfotransferase 6b1 genes were found to be expanded in the air-breathing walking catfish genome, with 15, 15, and 12 copies, respectively, compared to non-air-breathing fishes that possess only 1–2 copies of these genes. Additionally, we sequenced and compared the transcriptomes of the gill and the air-breathing organ to characterize the mechanism of aerial respiration involved in elastic fiber formation, oxygen binding and transport, angiogenesis, ion homeostasis and acid-base balance. The hemoglobin genes were expressed dramatically higher in the air-breathing organ than in the gill of walking catfish. This study provides an important genomic resource for understanding the adaptive mechanisms of walking catfish to terrestrial environments. It is possible that the coupling of enhanced abilities for oxygen storage and oxygen transport through genomic expansion of myoglobin genes and transcriptomic up-regulation of hemoglobin and angiogenesis-related genes are important components of the molecular basis for adaptation of this aquatic species to terrestrial life. The online version of this article (10.1186/s12864-018-5355-9) contains supplementary material, which is available to authorized users.
Ning Li; Lisui Bao; Tao Zhou; Zihao Yuan; Shikai Liu; Rex Dunham; Yuanning Li; Kun Wang; Xiaoyan Xu; Yulin Jin; Qifan Zeng; Sen Gao; Qiang Fu; Yang Liu; Yujia Yang; Qi Li; Axel Meyer; Dongya Gao; Zhanjiang Liu. Genome sequence of walking catfish (Clarias batrachus) provides insights into terrestrial adaptation. BMC Genomics 2018, 19, 952 .
AMA StyleNing Li, Lisui Bao, Tao Zhou, Zihao Yuan, Shikai Liu, Rex Dunham, Yuanning Li, Kun Wang, Xiaoyan Xu, Yulin Jin, Qifan Zeng, Sen Gao, Qiang Fu, Yang Liu, Yujia Yang, Qi Li, Axel Meyer, Dongya Gao, Zhanjiang Liu. Genome sequence of walking catfish (Clarias batrachus) provides insights into terrestrial adaptation. BMC Genomics. 2018; 19 (1):952.
Chicago/Turabian StyleNing Li; Lisui Bao; Tao Zhou; Zihao Yuan; Shikai Liu; Rex Dunham; Yuanning Li; Kun Wang; Xiaoyan Xu; Yulin Jin; Qifan Zeng; Sen Gao; Qiang Fu; Yang Liu; Yujia Yang; Qi Li; Axel Meyer; Dongya Gao; Zhanjiang Liu. 2018. "Genome sequence of walking catfish (Clarias batrachus) provides insights into terrestrial adaptation." BMC Genomics 19, no. 1: 952.
Pacific saury (Cololabis saira) are widely distributed in northwestern Pacific, migrating from their spawning ground in subtropical Kuroshio waters south of Japan to feeding grounds in Oyashio waters northeast of Japan. The abundance of Pacific saury is expected to be affected not only by environmental conditions in the fishing grounds of the Oyashio region, but also by recruitment processes influenced by environmental conditions in the Kuroshio region. In this study, we focus on the effects of environmental variations in the spawning ground on Pacific saury abundance, approximated by catch and CPUE data. To examine interannual-decadal variability in the spawning ground, we developed a suite of spawning ground indices, including (1) average winter sea surface temperature (WSST), (2) the meridional position of 19 °C sea surface temperature (SST) isoline (MP19), and (3) SST-suitability-weighted size of spawning ground (WSSG), in the Kuroshio region. These spawning ground indices exhibited interannual-decadal variation patterns with regime shifts in 1962/63, 1976/77, 1987/88, 1997/98, and likely in the early 2010s, which corresponded well to data on catch and CPUE of Pacific saury. Large scale climatic indices such as Southern Oscillation Index (SOI) and Asian Monsoon Index (MOI) were negatively correlated with winter SST in most of the Kuroshio region, suggesting that large-scale climatic influences played important roles in the variability of SST within the Kuroshio region. Gradient forest analyses were used to quantify the importance of these spawning ground indices for explaining the variations of Pacific saury abundance and to identify shifts in catch and CPUE along the gradients of the spawning ground indices. MP19 with a 2-year lag (MP19_Lag2) was identified as the most important predictor of Pacific saury abundance in terms of CPUE, followed by WSST_Lag2, WSST, WSSG_Lag1, and WSSG. Spawning ground indices, particularly MP19_Lag2, were useful for rationalizing the dynamics of Pacific saury abundance, matching well the striking declines of catch both in the early 1960s and also in the most recent years.
Shigang Liu; Yang Liu; Caihong Fu; Luxin Yan; Yi Xu; Rong Wan; Jianchao Li; Yongjun Tian. Using novel spawning ground indices to analyze the effects of climate change on Pacific saury abundance. Journal of Marine Systems 2018, 191, 13 -23.
AMA StyleShigang Liu, Yang Liu, Caihong Fu, Luxin Yan, Yi Xu, Rong Wan, Jianchao Li, Yongjun Tian. Using novel spawning ground indices to analyze the effects of climate change on Pacific saury abundance. Journal of Marine Systems. 2018; 191 ():13-23.
Chicago/Turabian StyleShigang Liu; Yang Liu; Caihong Fu; Luxin Yan; Yi Xu; Rong Wan; Jianchao Li; Yongjun Tian. 2018. "Using novel spawning ground indices to analyze the effects of climate change on Pacific saury abundance." Journal of Marine Systems 191, no. : 13-23.