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Steindachneridion melanodermatum, an endemic and endangered species, is the largest catfish in the Lower Iguaçu River basin. Currently, the wild population of this species no longer exists in most of this basin, probably due to the loss of habitat by successive hydroelectric dams. This study evaluated the spatial distribution and abundance of S. melanodermatum in the last free-flowing river stretch of approximately 190 km downstream from the Salto Caxias Dam, upstream of the Iguaçu Falls, as well as some tributaries. Hydroacoustic and fishing campaigns were performed between September 2010 to December 2016 to characterize the preferred habitat. A total of 180 specimens was sampled with higher abundances in a protected area near Iguaçu Falls in the Iguaçu National Park. Twenty-four deep pools were identified with maximum depths ranging from 5 to 25 m: 21 pools were along the main channel of the Iguaçu River, and three pools were in tributaries. Deep pools are preferential habitats for this species, especially the deep pool called Poço Preto (P23) and its surroundings. Conservation strategies are required to protect these habitats and prevent S. melanodermatum from becoming extinct, such as establishing deep pools as ecological sanctuaries, intensifying the inspection of illegal fishing, and maintaining dam-free tributaries.
Lucileine Assumpção; Maristela Makrakis; Jhony Silva; Karane Moraes; Suelen Pini; Patrícia Silva; Elaine Kashiwaqui; Eduardo Gentil; Lenice Souza-Shibatta; Oscar Shibatta; Sergio Makrakis. Deep Pools: Ecological Sanctuaries for Steindachneridion melanodermatum, a Large Endemic and Endangered Pimelodid of the Iguaçu River. Water 2021, 13, 1700 .
AMA StyleLucileine Assumpção, Maristela Makrakis, Jhony Silva, Karane Moraes, Suelen Pini, Patrícia Silva, Elaine Kashiwaqui, Eduardo Gentil, Lenice Souza-Shibatta, Oscar Shibatta, Sergio Makrakis. Deep Pools: Ecological Sanctuaries for Steindachneridion melanodermatum, a Large Endemic and Endangered Pimelodid of the Iguaçu River. Water. 2021; 13 (12):1700.
Chicago/Turabian StyleLucileine Assumpção; Maristela Makrakis; Jhony Silva; Karane Moraes; Suelen Pini; Patrícia Silva; Elaine Kashiwaqui; Eduardo Gentil; Lenice Souza-Shibatta; Oscar Shibatta; Sergio Makrakis. 2021. "Deep Pools: Ecological Sanctuaries for Steindachneridion melanodermatum, a Large Endemic and Endangered Pimelodid of the Iguaçu River." Water 13, no. 12: 1700.
The catch and selectivity effectiveness of two artificial attractors-AA (bright gray curly ribbon and green lightsticks) in gillnets was evaluated in order to increase the productivity and income of small scale fishermen. Five expeditions were carried on the Araguaia River, where the two AA treatments were applied to two thirds of the area of gillnets, leaving the remaining third without the use of attractors (control). For a better comparison, the catches were subdivided into ecological groups (carnivores, detritivores, herbivores and omnivores). 541 fish were caught, 197 in the curly ribbon, 177 lightstick and 167 in the control. Carnivorous fishes were predominant in all treatments (p = 0.025 for Kruskal Wallis test and p = 0.03 for Mann-Whitney test). The use of the ribbon and lighstick provided an increase in the catch of carnivorous teleost fish, providing a better gross profit margin. Due the low incomes and fragile economic situation of the fishing communities of Araguaia, the best technological choice in this study is the curly ribbon, as in addition to presenting better productivity, it is accessible low cost and easy to handle.
Eduardo Gentil; Adriano Prysthon; Carolyne Ribeiro Gomes Dias; Fernando Borges Silva; Manoel Xavier Pedroza Filho. Artificial attractors in small scale fisheries gillnets on Araguaia river, Brazil. Research, Society and Development 2020, 9, e913986364 -e913986364.
AMA StyleEduardo Gentil, Adriano Prysthon, Carolyne Ribeiro Gomes Dias, Fernando Borges Silva, Manoel Xavier Pedroza Filho. Artificial attractors in small scale fisheries gillnets on Araguaia river, Brazil. Research, Society and Development. 2020; 9 (8):e913986364-e913986364.
Chicago/Turabian StyleEduardo Gentil; Adriano Prysthon; Carolyne Ribeiro Gomes Dias; Fernando Borges Silva; Manoel Xavier Pedroza Filho. 2020. "Artificial attractors in small scale fisheries gillnets on Araguaia river, Brazil." Research, Society and Development 9, no. 8: e913986364-e913986364.
This study describes a new recreational fishing method focused on marine catfish, Genidens barbus (Endangered‐EN), through the adoption of its eggs as a natural bait during its reproductive period in southern Brazilian ecosystems. Male G. barbus perform parental care, collecting eggs released by females after the fertilization process. Owing to this male behavioural pattern during the reproductive period, these individuals are easily caught in recreational fisheries that use eggs of the same species as a natural bait. The current adoption of G. barbus eggs as bait may intensify the fishing pressure on its populations. This article is protected by copyright. All rights reserved.
Rodrigo Machado; Eduardo Gentil; Jorge Luiz Rodrigues‐Filho. When an advantageous reproductive trait turns bad: Eggs of the threatened fish Genidens barbus as a natural bait in recreational fisheries. Journal of Fish Biology 2020, 97, 1 .
AMA StyleRodrigo Machado, Eduardo Gentil, Jorge Luiz Rodrigues‐Filho. When an advantageous reproductive trait turns bad: Eggs of the threatened fish Genidens barbus as a natural bait in recreational fisheries. Journal of Fish Biology. 2020; 97 (3):1.
Chicago/Turabian StyleRodrigo Machado; Eduardo Gentil; Jorge Luiz Rodrigues‐Filho. 2020. "When an advantageous reproductive trait turns bad: Eggs of the threatened fish Genidens barbus as a natural bait in recreational fisheries." Journal of Fish Biology 97, no. 3: 1.
Increasing continental suspended sediment influx to coral reefs is an example of land-sea coupling that requires the identification of sources, magnitude of transport, and controlling processes. In Brazil, a small coastal basin (Macaé River) was identified as a source of suspended sediment to a coral reef on the coast of Cape Armação dos Búzios. Biannual suspended sediment loads were measured at the basin as were fluxes within the estuary and towards the coast during eight tidal cycles. Particle load and yield from this basin were typical of small coastal basins, showing high to moderate slopes and transitional land management. However, the magnitude of the river loads was lower than the sediment transport within the estuary, indicating that the estuary amplifies river fluxes and sustains the transference of suspended sediment alongshore to the coral reef. Nonetheless, the estuary displays both suspended particle retention and export capacity and, therefore, fluxes to the coast and the coral reef occur as episodic events.
Paula Sagilião Isacksson; Eduardo Guilherme Gentil de Farias; Francisco José Dias; Roberto Nascimento de Farias; Anandra Machado; Francisco De Assis Esteves; Mauricio Mussi Molisani. Small river basin and estuarine sediment fluxes: The magnitude necessary for coastal dispersion and siltation effects on a coral reef. International Journal of Sediment Research 2019, 34, 591 -599.
AMA StylePaula Sagilião Isacksson, Eduardo Guilherme Gentil de Farias, Francisco José Dias, Roberto Nascimento de Farias, Anandra Machado, Francisco De Assis Esteves, Mauricio Mussi Molisani. Small river basin and estuarine sediment fluxes: The magnitude necessary for coastal dispersion and siltation effects on a coral reef. International Journal of Sediment Research. 2019; 34 (6):591-599.
Chicago/Turabian StylePaula Sagilião Isacksson; Eduardo Guilherme Gentil de Farias; Francisco José Dias; Roberto Nascimento de Farias; Anandra Machado; Francisco De Assis Esteves; Mauricio Mussi Molisani. 2019. "Small river basin and estuarine sediment fluxes: The magnitude necessary for coastal dispersion and siltation effects on a coral reef." International Journal of Sediment Research 34, no. 6: 591-599.
Eduardo Farias; Antônio Pereira-Júnior; Marcelo Domingos; David Dantas. Proposed bycatch-reduction modifications of shrimp fyke nets used in South American lagoons. Acta Ichthyologica et Piscatoria 2019, 49, 1 -7.
AMA StyleEduardo Farias, Antônio Pereira-Júnior, Marcelo Domingos, David Dantas. Proposed bycatch-reduction modifications of shrimp fyke nets used in South American lagoons. Acta Ichthyologica et Piscatoria. 2019; 49 (1):1-7.
Chicago/Turabian StyleEduardo Farias; Antônio Pereira-Júnior; Marcelo Domingos; David Dantas. 2019. "Proposed bycatch-reduction modifications of shrimp fyke nets used in South American lagoons." Acta Ichthyologica et Piscatoria 49, no. 1: 1-7.
One of the most recognized anthropogenic impacts in marine environments is solid waste pollution, especially plastic, which can be ingested by fish, thus interfering with their health. In this context, the aim of this study is to describe the ingestion of plastic fragments and to identify the possible effect of this contamination in the condition factor of Genidens genidens in the Laguna Estuarine System. The stomach contents of 92 G. genidens (26 juveniles and 66 adults) were analyzed. The Index of Relative Importance was performed to identify the contribution of each prey item. Condition factor (CF) was used to analyze the effect of plastic ingestion on the fish's body condition (by comparing individuals in the same ontogenetic phase). For the juveniles, eight items were observed, the most important of which were Penaeidae, followed by Portunidae and plastic. For the adults, 12 items were observed, the most important of which were Penaeidae, Portunidae, Polychaeta, and plastic. The analysis of CF demonstrated higher values for individuals without plastic in the stomach, which indicated a better health condition. The CF of a fish may be affected by variations in the physiological condition, environmental stresses, and nutritional and biological variations, and could be used to compare the body condition or health of a fish species. The ingestion of plastic could significantly influence the worst body condition of the individuals that were analyzed in the present study. The plastic pollution in marine coastal waters is associated with the appropriate waste management levels.
David V. Dantas; Cristian I. R. Ribeiro; Catarina De C. A. Frischknecht; Rodrigo Machado; Eduardo G. G. Farias. Ingestion of plastic fragments by the Guri sea catfish Genidens genidens (Cuvier, 1829) in a subtropical coastal estuarine system. Environmental Science and Pollution Research 2019, 26, 8344 -8351.
AMA StyleDavid V. Dantas, Cristian I. R. Ribeiro, Catarina De C. A. Frischknecht, Rodrigo Machado, Eduardo G. G. Farias. Ingestion of plastic fragments by the Guri sea catfish Genidens genidens (Cuvier, 1829) in a subtropical coastal estuarine system. Environmental Science and Pollution Research. 2019; 26 (8):8344-8351.
Chicago/Turabian StyleDavid V. Dantas; Cristian I. R. Ribeiro; Catarina De C. A. Frischknecht; Rodrigo Machado; Eduardo G. G. Farias. 2019. "Ingestion of plastic fragments by the Guri sea catfish Genidens genidens (Cuvier, 1829) in a subtropical coastal estuarine system." Environmental Science and Pollution Research 26, no. 8: 8344-8351.
Blue crabs (Callinectes spp.) are widely distributed around coastal regions being usually exploited by artisanal fishing through specific fishing gears, like as crab traps. Notably, two crab traps types are adopted in Brazil: (I) rectangular crab traps and (II) circular crab traps. Empirically, fishermen suggest that the geometry of these fishing gears amongst the wind regimes in shallow waters are directly related to the catch success, that is, the blue crabs capture into the crab traps. However, these empirical observations have not been proven by academy. Thus, the present study analysed the performance of circular and rectangular traps during twenty campaigns in a coastal lagoon located in Laguna, Santa Catarina–Brazil. The results showed that circular crab traps obtained the highest catches of Callinectes spp. than rectangular crab traps. We observed that wind direction can influence the catch performance in both fishing gears and the best catch performance in our study region were during NE and SO wind quadrants.
Thayna M Biehl; David Valença Dantas; Eduardo Guilherme Gentil De Farias. Influence of Crab Trap Geometry and Wind Direction over the Catch Fluctuations in a Neotropical Coastal Lagoon. Journal of FisheriesSciences.com 2019, 13, 1 .
AMA StyleThayna M Biehl, David Valença Dantas, Eduardo Guilherme Gentil De Farias. Influence of Crab Trap Geometry and Wind Direction over the Catch Fluctuations in a Neotropical Coastal Lagoon. Journal of FisheriesSciences.com. 2019; 13 (1):1.
Chicago/Turabian StyleThayna M Biehl; David Valença Dantas; Eduardo Guilherme Gentil De Farias. 2019. "Influence of Crab Trap Geometry and Wind Direction over the Catch Fluctuations in a Neotropical Coastal Lagoon." Journal of FisheriesSciences.com 13, no. 1: 1.
Maquetes físicas podem auxiliar o ensino acerca da confecção e dimensionamento dos petrechos de pesca, possibilitando levantar questões, comunicar ideias e suscitar hipóteses sobre o comportamento destes dispositivos no ambiente aquático, fornecendo um viés alternativo às metodologias tradicionais de ensino da tecnologia pesqueira que, muitas vezes incitam a falta de estímulo por parte dos discentes. Deste modo, o presente trabalho oferta uma perspectiva ainda inédita para o ensino da tecnologia pesqueira no país: a proposta de planos técnicos destinados à confecção de miniaturas de redes de arrasto com portas. Assim, foram dimensionados quatro planos técnicos miniaturizados da modalidade arrasto, contemplando uma ampla diversidade de planos construtivos para esta modalidade de captura. Os planos técnicos sugeridos permitem a obtenção de maquetes com o mesmo formato geométrico dos planos tradicionais. As frações de corte calculadas consideraram o uso de panagens de poliamida multifilamento com abertura de malha 25 mm. Esperamos que a presente proposta possa fomentar novas metodologias didáticas dedicadas ao ensino de projetos de pesca a partir de um processo reflexivo, promovendo a qualificação de recursos humanos capazes de gerar alternativas tecnológicas viáveis para o setor pesqueiro.
Natálya De Souza Bernardelli; Eduardo Guilherme Gentil de Farias. PLANOS TÉCNICOS DE MAQUETES DE REDES DE ARRASTOS COM PORTAS PARA O ENSINO DA TECNOLOGIA PESQUEIRA. Arquivos de Ciências do Mar 2018, 50, 125 -132.
AMA StyleNatálya De Souza Bernardelli, Eduardo Guilherme Gentil de Farias. PLANOS TÉCNICOS DE MAQUETES DE REDES DE ARRASTOS COM PORTAS PARA O ENSINO DA TECNOLOGIA PESQUEIRA. Arquivos de Ciências do Mar. 2018; 50 (2):125-132.
Chicago/Turabian StyleNatálya De Souza Bernardelli; Eduardo Guilherme Gentil de Farias. 2018. "PLANOS TÉCNICOS DE MAQUETES DE REDES DE ARRASTOS COM PORTAS PARA O ENSINO DA TECNOLOGIA PESQUEIRA." Arquivos de Ciências do Mar 50, no. 2: 125-132.
Atlantic Bigeye (Priacanthus arenatus) is a demersal species from the Priacanthidae family with little literature relating to its biology and catch aspects. Due to this lack of research, the focus of this effort was to describe the feeding preferences of Atlantic Bigeye and to evaluate the influence of plastic debris derived from the local fisheries activities on its diet. The most important items were Corophiidae, Penaeidae, Actinopterygii, Isopoda, Cephalopoda, Policheta and plastic. Plastic was present in 49.17% of the stomachs analyzed. A total of 210 plastic fragments were found, and 63% were derived from fishing. Of those, 55% were derived from paint fragments from vessels and 8% from synthetic fibers (PA). The results suggest that plastic fragments found in stomachs are related to the species' natural diet and that this debris is locally deposited in the coastal environment. Fishing resources appear to have been affected by this local marine pollution.
Ana Lúcia Paz Cardozo; Eduardo Guilherme Gentil de Farias; Jorge L. Rodrigues-Filho; Isabel B. Moteiro; Tatianny M. Scandolo; David V. Dantas. Feeding ecology and ingestion of plastic fragments by Priacanthus arenatus: What's the fisheries contribution to the problem? Marine Pollution Bulletin 2018, 130, 19 -27.
AMA StyleAna Lúcia Paz Cardozo, Eduardo Guilherme Gentil de Farias, Jorge L. Rodrigues-Filho, Isabel B. Moteiro, Tatianny M. Scandolo, David V. Dantas. Feeding ecology and ingestion of plastic fragments by Priacanthus arenatus: What's the fisheries contribution to the problem? Marine Pollution Bulletin. 2018; 130 ():19-27.
Chicago/Turabian StyleAna Lúcia Paz Cardozo; Eduardo Guilherme Gentil de Farias; Jorge L. Rodrigues-Filho; Isabel B. Moteiro; Tatianny M. Scandolo; David V. Dantas. 2018. "Feeding ecology and ingestion of plastic fragments by Priacanthus arenatus: What's the fisheries contribution to the problem?" Marine Pollution Bulletin 130, no. : 19-27.
Worldwide, the marine debris emissions have been provoking impacts in ecosystems, generating massive mortality of different species with commercial interest. In South America, we have a lack of studies to verify the marine debris composition in transitional environments such as adjacent regions of coastal jetties. These are hydraulic engineering constructions used to maintain the navigation channel access between the sea-estuarine interface and are also used by teleost fishes, crustaceans, and mollusks like artificial shelters (reefs), being excellent fishing grounds. Therefore, the present study was devoted to qualitatively evaluate the composition of marine debris in an internal jetty portion of a Laguna Estuarine System (LES) located in South America (Brazil). Six hundred freediving were conducted to collect marine debris in the study region. The in situ campaigns were performed in 2016 during all spring season (sand substrata) in four distinct zones with 26,400 m2 each one covering almost all adjacent jetty extension, to evaluate possible spatial changes in the marine debris composition. All material obtained was identified, measured, weighed, and ordered in eight groups, with six groups being related to the fishing activity and two groups related to the tourism/community in the study region. So, it was possible to observe possible relations between the marine debris distribution to artisanal and recreational local fishing. After 600 freediving sampling efforts, 2142 marine debris items were obtained, totaling close to 100 kg of solid waste removed from the inner portion of the coastal jetty. Notably, 1752 units (50 kg) of fishing leads were collected being this item the main marine debris residue found in the four sampled areas, corresponding to nearly 50% of the total weight of the collected waste. Ninety-eight percent of marine debris were derived from the local fishing activities, and just 2% were derived from tourism/community. Considering the total contribution related to fishing, 83% of the marine debris were composed by lead (sinkers) adopted by recreational and artisanal fishing. Notably, the catch activity in this region has a close influence over the marine debris composition. Reductions of marine debris emissions derived from the fishing activities have been a global challenge, once this problem is occurring in practically all marine and estuarine environments under the anthropic action. The presence of marine debris changes the local landscape and can provoke serious environmental problems, such as ghost fishing that affects a wide variability of marine mammals, birds, and fishes. Most of marine debris collected came from recreational and artisanal fishing, being the fishing leads the most prominent material, especially in sector 4. This fact is possibly related to the intense mullet fishing using cast nets, usual in this sample area. In the other sectors, there was a great predominance of grapnel fishing leads, widely adopted by recreational fishermen in open water environments. The “fingernails” present in these fishing leads ensure the sinking of the line for a specific location independently of possible flow oscillations of the tidal current and/or currents generated by winds. The massive quantity of fishing leads into the sectors is a dangerous fact. Notably, lead is a heavy, non-biodegradable, and extremely toxic metal that, due to the anthropogenic activities, has been increasing around the world. Future efforts in our study region should evaluate the seasonal marine debris composition to observe possible changes along the different seasons of the year. In this way, it would be possible to infer quantitatively the emission of marine debris derived from the fishing activity, assessing its impacts and enabling the adoption of environmental management strategies. This effort adopted a qualitative analysis, serving to show the current situation of this region that we now know to be vulnerable to the presence of marine debris derived from the fishing activity.
Eduardo G. G. Farias; Paulo R. Preichardt; David Valença Dantas. Influence of fishing activity over the marine debris composition close to coastal jetty. Environmental Science and Pollution Research 2018, 25, 16246 -16253.
AMA StyleEduardo G. G. Farias, Paulo R. Preichardt, David Valença Dantas. Influence of fishing activity over the marine debris composition close to coastal jetty. Environmental Science and Pollution Research. 2018; 25 (16):16246-16253.
Chicago/Turabian StyleEduardo G. G. Farias; Paulo R. Preichardt; David Valença Dantas. 2018. "Influence of fishing activity over the marine debris composition close to coastal jetty." Environmental Science and Pollution Research 25, no. 16: 16246-16253.
Fisheries in Brazil, the country with most territory in South America, is not comprehensive at all. The lack of precise historical data is the main concern faced by perspectives of fishery management. The majority of data are simplistic records of extrapolated biomass published by federal entities regardless the habitat from where fish resources were harvested, how they were captured and lengths of capture. Little attention was given to the social, economic and cultural aspects of traditional communities and their livelihood. Worst is the case of estuarine systems of the Western Atlantic, where artisanal fishery rules the landings and the absence of proper monitoring, control and surveillance leads to poor managerial actions. As a result, fishery studies conclude that most fish stocks of Western Atlantic estuaries show signs of over-exploitation. Palliative measures such as closed periods for capture of common resources has emerged as urgent option aiming to reduce the impacts of overfishing. Bycatch reduction devices are examples of emerging options. Fishery management of Brazilian estuaries urges accelerated actions: introduce rights and duties-based fishery management to guarantee the declaration of every fisherman activities; enable fishers to organize themselves through the idea of ecological sustainability and economic efficiency; and acquiring daily reports of fish landings through stakeholder approach and co-management. Fishery pressure is not the unique responsible for reduced estuarine production. Bycatch due to small-mesh nets, oxygen-consuming effluents, emerging pollutants, solid wastes, deforestation of mangrove forest for human purposes and human-driven changes in river flow and estuarine morphology are rapidly changing the nature of a nursery environment. Co-management, long-term data and daily reports on production can help to design stock assessment models, understand variations in biomass over time, detect problems of uncontrolled fishing effort, point periods of seasonal habits for each fishery resource, and, most importantly, guarantee that enough juveniles of each living resource can be recruited to adult stocks. The compliance of ecological data and biological research, robust data for landing stats and the social profile of the fishery community seems to be the ideal approach to build proper rules of co-management in Western Atlantic estuaries.
Mário Barletta; André R. A. Lima; David V. Dantas; Igor M. Oliveira; Jurandyr Reis Neto; Cezar Fernandes; Eduardo G. G. Farias; Jorge L. R. Filho; Monica F. Costa. How Can Accurate Landing Stats Help in Designing Better Fisheries and Environmental Management for Western Atlantic Estuaries? Coastal Wetlands: Alteration and Remediation 2017, 21, 631 -703.
AMA StyleMário Barletta, André R. A. Lima, David V. Dantas, Igor M. Oliveira, Jurandyr Reis Neto, Cezar Fernandes, Eduardo G. G. Farias, Jorge L. R. Filho, Monica F. Costa. How Can Accurate Landing Stats Help in Designing Better Fisheries and Environmental Management for Western Atlantic Estuaries? Coastal Wetlands: Alteration and Remediation. 2017; 21 ():631-703.
Chicago/Turabian StyleMário Barletta; André R. A. Lima; David V. Dantas; Igor M. Oliveira; Jurandyr Reis Neto; Cezar Fernandes; Eduardo G. G. Farias; Jorge L. R. Filho; Monica F. Costa. 2017. "How Can Accurate Landing Stats Help in Designing Better Fisheries and Environmental Management for Western Atlantic Estuaries?" Coastal Wetlands: Alteration and Remediation 21, no. : 631-703.
Shrimp trawls are one of the main bycatch generators in artisanal fisheries. Our work evaluated the adoption of low cost devices for artisanal bottom trawling to reduce bycatch assimilation and improve shrimp catches. To evaluate the proposed changes, we evaluated the performance of four different trawl gears from May to July 2015 in Pinheira Beach, Brazil. The hauls were divided into four treatments as follows: (1) hauls with unmodified control gear, (2) hauls with gear that included the kite escape device (KED), (3) hauls with gear that included long sweeps, and (4) hauls with gear that included both the KED and long sweeps. The second trawling group (2) showed the highest reduction in bycatch for all trawl gears. Additionally, all hauls that included the KED and/or long sweeps had improved shrimp catches during the study compared with trawl nets without the KED. During the hauls with KEDs we got the best shrimp‐to‐bycatch proportion (1:8.9). The modifications proposed can improve trawl gear selectivity while maintaining the shrimp catches.
Wagner João Vieira; Marcelo Manoel Domingos; Jorge Luiz Rodrigues-Filho; Eduardo Guilherme Gentil De Farias. Kite Escape Device: a New Approach to Reduce Bycatch in Shrimp Trawls. Marine and Coastal Fisheries 2017, 9, 396 -403.
AMA StyleWagner João Vieira, Marcelo Manoel Domingos, Jorge Luiz Rodrigues-Filho, Eduardo Guilherme Gentil De Farias. Kite Escape Device: a New Approach to Reduce Bycatch in Shrimp Trawls. Marine and Coastal Fisheries. 2017; 9 (1):396-403.
Chicago/Turabian StyleWagner João Vieira; Marcelo Manoel Domingos; Jorge Luiz Rodrigues-Filho; Eduardo Guilherme Gentil De Farias. 2017. "Kite Escape Device: a New Approach to Reduce Bycatch in Shrimp Trawls." Marine and Coastal Fisheries 9, no. 1: 396-403.
The effects of cage aquaculture on freshwater ecosystems are determined by multiple farming and environmental variables, and thus, the assessment of a wide range of abiotic and biotic variables enables better understanding of the impacts generated by this nutrient source. This study was carried out at Castanhão reservoir located in the State of Ceará, which is the largest Brazilian producer of Nile tilapia in cage systems, wherein about 8000 reservoirs provide a vast area to expand not only this important socio-economic but also pollution-prone activity. Nutrient mass budget, water quality monitoring, hydrodynamic characterization, and elemental/stable isotopic composition of end-member products were measured in cage aquaculture and other reservoir areas in order to determine the relative effects on reservoir conditions. Nutrient budgets showed that 34% of the artificial feed was lost to the water column but water quality monitoring and isotopic composition analysis suggested that the cages were not extensively impacting the water quality probably because of the physiographic and hydrodynamic features of the cage site.
Mauricio Mussi Molisani; Thiago Maia Do Monte; George Harrison Vasconcellos; Hortência De Souza Barroso; Maria Odete Parente Moreira; Helena Becker; Carlos Eduardo De Rezende; Marcos Alberto Lima Franco; Eduardo Guilherme Gentil De Farias; Plinio Barbosa de Camargo. Relative effects of nutrient emission from intensive cage aquaculture on the semiarid reservoir water quality. Environmental Monitoring and Assessment 2015, 187, 1 .
AMA StyleMauricio Mussi Molisani, Thiago Maia Do Monte, George Harrison Vasconcellos, Hortência De Souza Barroso, Maria Odete Parente Moreira, Helena Becker, Carlos Eduardo De Rezende, Marcos Alberto Lima Franco, Eduardo Guilherme Gentil De Farias, Plinio Barbosa de Camargo. Relative effects of nutrient emission from intensive cage aquaculture on the semiarid reservoir water quality. Environmental Monitoring and Assessment. 2015; 187 (11):1.
Chicago/Turabian StyleMauricio Mussi Molisani; Thiago Maia Do Monte; George Harrison Vasconcellos; Hortência De Souza Barroso; Maria Odete Parente Moreira; Helena Becker; Carlos Eduardo De Rezende; Marcos Alberto Lima Franco; Eduardo Guilherme Gentil De Farias; Plinio Barbosa de Camargo. 2015. "Relative effects of nutrient emission from intensive cage aquaculture on the semiarid reservoir water quality." Environmental Monitoring and Assessment 187, no. 11: 1.
The biogeochemical dynamics of carbon in the ocean is a subject of fundamental interest to environmental studies. In this context, we have implemented a ten year run of the Brazilian Earth System Coupled Ocean-Atmosphere Model (BESM-OA2.3) integrated with TOPAZ biogeochemical model for the Atlantic basin. The modeled ΔpCO2 for the tropical Atlantic shows very clearly a high dominance of positive fluxes, that is, the CO2 fluxes are sea-to-air throughout the tropical region and for both winter and summer periods. In the mid-latitudes regions negatives fluxes (air-to-sea) were observed for both seasons. An exception to this pattern is an extensive negative tongue on the latitude 10N. The occurrence of this negative ΔpCO2 tongue region in the Tropical Atlantic is highly correlated to negative Evaporation-Precipitation values during this season. In the northern hemisphere (NH) summer the negative values of ΔpCO2 in the tropical Atlantic region are concentrated in the adjacent zone of the Amazon river mouth due to the North Equatorial Counter Current intensification. This process favors the formation of a carbon sink in the adjacent region of the Amazon river mouth. Model results show lowest values of dissolved inorganic carbon (DIC) in a surface layer (100 - 150 m). Highest DIC values are observed in deeper layers and concentrated in an equatorial band. The chlorophyll bloom in equatorial zones was well represented by the model. These blooms are the result of equatorial upwelling that brings the high concentration tongues of DIC present in the equatorial band towards the euphotic zone. This is the first published paper about the BESM-OA2.3 integrated with TOPAZ. The presented results suggest that this modeling system is able to reproduce the main regional carbon dynamics features of the mid-latitude/tropical Atlantic.
Eduardo G. G. de Farias; Paulo Nobre; Jo~Ao A. Lorenzzetti; Roberto A. F. de Almeida; Luiz C. I. Júnior. Variability of Air-Sea CO2 Fluxes and Dissolved Inorganic Carbon Distribution in the Atlantic Basin: A Coupled Model Analysis. International Journal of Geosciences 2013, 04, 249 -258.
AMA StyleEduardo G. G. de Farias, Paulo Nobre, Jo~Ao A. Lorenzzetti, Roberto A. F. de Almeida, Luiz C. I. Júnior. Variability of Air-Sea CO2 Fluxes and Dissolved Inorganic Carbon Distribution in the Atlantic Basin: A Coupled Model Analysis. International Journal of Geosciences. 2013; 04 (01):249-258.
Chicago/Turabian StyleEduardo G. G. de Farias; Paulo Nobre; Jo~Ao A. Lorenzzetti; Roberto A. F. de Almeida; Luiz C. I. Júnior. 2013. "Variability of Air-Sea CO2 Fluxes and Dissolved Inorganic Carbon Distribution in the Atlantic Basin: A Coupled Model Analysis." International Journal of Geosciences 04, no. 01: 249-258.
Eduardo G. Gentil De Farias; Luís Parente Maia. ANÁLISE DA INCERTEZA DO MAPEAMENTO BATIMÉTRICO DO CANAL DE NAVEGAÇÃO DO PORTO DO MUCURIPE (CE) – BRASIL. Mercator 2012, 11, 169 -177.
AMA StyleEduardo G. Gentil De Farias, Luís Parente Maia. ANÁLISE DA INCERTEZA DO MAPEAMENTO BATIMÉTRICO DO CANAL DE NAVEGAÇÃO DO PORTO DO MUCURIPE (CE) – BRASIL. Mercator. 2012; 11 (25):169-177.
Chicago/Turabian StyleEduardo G. Gentil De Farias; Luís Parente Maia. 2012. "ANÁLISE DA INCERTEZA DO MAPEAMENTO BATIMÉTRICO DO CANAL DE NAVEGAÇÃO DO PORTO DO MUCURIPE (CE) – BRASIL." Mercator 11, no. 25: 169-177.
Recently, with the availability of a great number of synthetic aperture radar (SAR) wave mode spectra, it has been possible to derive a set of great circle lines of swell propagation whose intersection points indicate the position of the storm generating the observed swell field. However, due to the inherent limitations of SAR spectra, the locus of convergence of great circle of swell propagation can be sometimes diffuse or contain multiple convergence regions. In this letter, we adapted the fuzzy cluster logic method to identify the regions of convergence of SAR wave field rays. The analysis of the results of the fuzzy algorithm clearly indicates the ability of this statistical method to identify the cluster center region of swell fields observed in SAR wave mode images. The measure of success of the method was how well the generation center of the swell could be traced back to an existing strong storm system.
Eduardo G. G. De Farias; Joao A. Lorenzzetti; Abderrahim Bentamy; Bertrand Chapron; Romain Husson. Fuzzy Logic Applied to Track Generation Areas of Swell Systems Observed by SAR. IEEE Geoscience and Remote Sensing Letters 2012, 9, 841 -845.
AMA StyleEduardo G. G. De Farias, Joao A. Lorenzzetti, Abderrahim Bentamy, Bertrand Chapron, Romain Husson. Fuzzy Logic Applied to Track Generation Areas of Swell Systems Observed by SAR. IEEE Geoscience and Remote Sensing Letters. 2012; 9 (5):841-845.
Chicago/Turabian StyleEduardo G. G. De Farias; Joao A. Lorenzzetti; Abderrahim Bentamy; Bertrand Chapron; Romain Husson. 2012. "Fuzzy Logic Applied to Track Generation Areas of Swell Systems Observed by SAR." IEEE Geoscience and Remote Sensing Letters 9, no. 5: 841-845.
Eduardo Guilherme Gentil de Farias; Luís Parente Maia. Uso de Técnicas de Geoprocessamento para a Análise da Evolução da Linha de Costa em Ambientes Litorâneos do Estado do Ceará, Brasil. Revista de Gestão Costeira Integrada 2010, 10, 521 -544.
AMA StyleEduardo Guilherme Gentil de Farias, Luís Parente Maia. Uso de Técnicas de Geoprocessamento para a Análise da Evolução da Linha de Costa em Ambientes Litorâneos do Estado do Ceará, Brasil. Revista de Gestão Costeira Integrada. 2010; 10 (4):521-544.
Chicago/Turabian StyleEduardo Guilherme Gentil de Farias; Luís Parente Maia. 2010. "Uso de Técnicas de Geoprocessamento para a Análise da Evolução da Linha de Costa em Ambientes Litorâneos do Estado do Ceará, Brasil." Revista de Gestão Costeira Integrada 10, no. 4: 521-544.