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In the Gulf of California; mineral deposits have contributed to high metal contents in coastal environments. This study examined cadmium; lead; copper; zinc; and iron contents in three fish species; Kyphosus vaigiensis (herbivore), Stegastes rectifraenum (omnivore), and Balistes polylepis (carnivore) at two mining sites. Metal concentrations were analyzed by atomic absorption spectrophotometry and stable nitrogen and carbon isotopes were estimated using mass spectrophotometry. Also, we assessed the risk to human health from the consumption of these three species based on permissible limits; although only two of them (Kyphosus and Balistes) are consumed as food. Metal concentrations differed among fish species; except for iron. The highest concentrations of metals were not always recorded in the species at the highest trophic level; i.e., Balistes. The highest concentrations (dry weight) recorded were cadmium (0.21 ± 0.03 µg g−1) and lead (1.67 ± 0.26 µg g−1), in S. rectifraenum; copper (1.60 ± 0.49 µg g−1) and zinc (67.30 ± 8.79 µg g−1), in B. polylepis; and iron (27.06 ± 2.58 µg g−1), in K. vaigiensis. Our findings show that each element accumulates differently in particular marine organisms; depending on the physiology of the species and the biogeochemistry of its habitat; which in turn is affected by the anthropogenic activities in adjacent areas. No risk of heavy metals toxicity is expected from the human consumption of the species and sites studied
Elisa Serviere-Zaragoza; Salvador Lluch-Cota; Alejandra Mazariegos-Villarreal; Eduardo Balart; Hugo Valencia-Valdez; Lia Méndez-Rodríguez. Cadmium, Lead, Copper, Zinc, and Iron Concentration Patterns in Three Marine Fish Species from Two Different Mining Sites inside the Gulf of California, Mexico. International Journal of Environmental Research and Public Health 2021, 18, 844 .
AMA StyleElisa Serviere-Zaragoza, Salvador Lluch-Cota, Alejandra Mazariegos-Villarreal, Eduardo Balart, Hugo Valencia-Valdez, Lia Méndez-Rodríguez. Cadmium, Lead, Copper, Zinc, and Iron Concentration Patterns in Three Marine Fish Species from Two Different Mining Sites inside the Gulf of California, Mexico. International Journal of Environmental Research and Public Health. 2021; 18 (2):844.
Chicago/Turabian StyleElisa Serviere-Zaragoza; Salvador Lluch-Cota; Alejandra Mazariegos-Villarreal; Eduardo Balart; Hugo Valencia-Valdez; Lia Méndez-Rodríguez. 2021. "Cadmium, Lead, Copper, Zinc, and Iron Concentration Patterns in Three Marine Fish Species from Two Different Mining Sites inside the Gulf of California, Mexico." International Journal of Environmental Research and Public Health 18, no. 2: 844.
In coastal systems, concentrations of trace metals in filter feeders such as shellfish may be affected by anthropogenic activities, including agriculture and aquaculture. Shellfish are a good source of iron, but can also be a potential source of toxic elements, such as cadmium and lead, when consumed by humans. The objective of this study was to determine the differences in iron, zinc, copper, manganese, nickel, lead, and cadmium levels in tissue of the clam Chione gnidia collected from a coastal lagoon influenced by agriculture (Lobos) or aquaculture (Tobari), using an atomic absorption spectrophotometer. The relationship of iron with all other trace elements in these organisms was explored using a generalized linear model (GLM). Iron, copper, manganese, and cadmium concentrations were significantly higher in shellfish collected from the coastal lagoon influenced by agriculture, while nickel was significantly higher in shellfish from the lagoon influenced by aquaculture. In these shellfish, cadmium and lead levels were the factors limiting the weekly intake of clam flesh. The GLM model explained 59% of the iron concentration in the Venus clam, suggesting that this element is directly related to zinc and manganese levels, but inversely related to cadmium content in shellfish.
Héctor Hugo Vargas-González; Jose Alfredo Arreola Lizárraga; Lia Mendez-Rodriguez; Ramon Gaxiola Robles; Jaqueline Garcia Hernández; Sergio Ticul Alvarez Castañeda. Effect of aquaculture-agriculture sewage on the relation between iron and other trace elements content in Venus clam. Maritime Technology and Research 2020, 2, 1 .
AMA StyleHéctor Hugo Vargas-González, Jose Alfredo Arreola Lizárraga, Lia Mendez-Rodriguez, Ramon Gaxiola Robles, Jaqueline Garcia Hernández, Sergio Ticul Alvarez Castañeda. Effect of aquaculture-agriculture sewage on the relation between iron and other trace elements content in Venus clam. Maritime Technology and Research. 2020; 2 (4):1.
Chicago/Turabian StyleHéctor Hugo Vargas-González; Jose Alfredo Arreola Lizárraga; Lia Mendez-Rodriguez; Ramon Gaxiola Robles; Jaqueline Garcia Hernández; Sergio Ticul Alvarez Castañeda. 2020. "Effect of aquaculture-agriculture sewage on the relation between iron and other trace elements content in Venus clam." Maritime Technology and Research 2, no. 4: 1.
Some rodents of the family Heteromyidae can survive without drinking water, as they obtain it from food. All these species have in common that they eat seeds and fruits. The content of trace metals in food varies depending on the local geology and anthropogenic activities. Baja California Sur has mineral deposits that have been exploited; thus, the metals released may be incorporated into seeds and fruits that are consumed by Heteromyidae. Therefore, metal content in the liver is expected to reflect the presence of mining in soil where these rodents thrive. Individuals from different species of Heteromyidae were collected at sites with mineral deposits; these were divided into two groups: rodents captured in sites with a history of mining operations (Santa Rosalia, San Juan de la Costa, and El Triunfo), and rodents captured in areas with no mining activities (El Vizcaíno, Punta Abreojos, Magdalena Island, and Santiago). The liver of these rodents was excised and its manganese, copper, cadmium, lead, zinc, nickel, and iron contents were determined using atomic absorption spectrophotometry. Manganese was the element that showed the highest significant differences between species, followed by zinc and copper. Iron and cadmium showed the lowest differences. Nickel and lead showed no differences. Chaetodipus arenarius showed significant differences between sites in copper and lead content; C. spinatus did not show significant differences for manganese, copper, nickel, and iron, but it did for cadmium and lead content. Differential accumulation of metals occurs across species. These results indicate that the same species could be used for comparative purposes in pollution monitoring. The comparison of different heteromid species, despite their sharing similar feeding habits and belonging to the same family, can lead to misinterpretation due to the variability of the results. This is probably due to the requirements and tolerances regarding essential elements, such as manganese and zinc, to or tolerance to non-essential elements such as cadmium and lead, which may vary across species.
Lia Méndez-Rodríguez; Sergio Ticul Álvarez-Castañeda. Differences in metal content in liver of Heteromyids from deposits with and without previous mining operations. Therya 2019, 10, 235 -242.
AMA StyleLia Méndez-Rodríguez, Sergio Ticul Álvarez-Castañeda. Differences in metal content in liver of Heteromyids from deposits with and without previous mining operations. Therya. 2019; 10 (3):235-242.
Chicago/Turabian StyleLia Méndez-Rodríguez; Sergio Ticul Álvarez-Castañeda. 2019. "Differences in metal content in liver of Heteromyids from deposits with and without previous mining operations." Therya 10, no. 3: 235-242.
Previous studies of mercury (Hg) in pregnant women in the area of La Paz, Baja California Sur (BCS), Mexico found a proportion of individuals had concentrations of total Hg ([THg]) above some thresholds of concern set by health agencies. The [THg] were associated with fish and seafood consumption as well as other factors; although it was unclear which marine diet items could potentially be contributing to the concentrations observed. We examined [THg] and monomethylmercury concentration ([MeHg+]) in the archived hair of 70 pregnant women from BCS as well as in diet items including fish, shellfish, and staple items (rice, beans, corn, and flour). We measured stable isotopes of carbon and nitrogen and employed a Bayesian stable isotope mixing model to investigate the proportion of fish and seafood in the isotopic profiles of archived hair samples. Concentrations of Hg species were low in staple foods and ranged from below detection limit to 5.71 parts per billion (ppb) wet weight. In hair, geometric mean [THg] was 658 ppb and [MeHg+] was 395 ppb, which were lower than previous reports. Percent MeHg+ was positively correlated with higher δ15N values. The largest carbon contributors to the diet of the study participants were corn and rice, and our analysis of fish contribution to diet varyingly agreed with the self-reported fish consumption. This report highlights the ability to discriminate potential sources of Hg from a diverse diet and the limitations of dietary recall studies.
John Harley; Ramón Gaxiola-Robles; Tania Zenteno-Savín; Lía Celina Méndez-Rodríguez; Alfonso Enrique Bencomo-Alvarez; Alisa Thiede; Todd M. O’Hara. Using carbon and nitrogen stable isotope modelling to assess dietary mercury exposure for pregnant women in Baja California Sur, Mexico. Chemosphere 2019, 234, 702 -714.
AMA StyleJohn Harley, Ramón Gaxiola-Robles, Tania Zenteno-Savín, Lía Celina Méndez-Rodríguez, Alfonso Enrique Bencomo-Alvarez, Alisa Thiede, Todd M. O’Hara. Using carbon and nitrogen stable isotope modelling to assess dietary mercury exposure for pregnant women in Baja California Sur, Mexico. Chemosphere. 2019; 234 ():702-714.
Chicago/Turabian StyleJohn Harley; Ramón Gaxiola-Robles; Tania Zenteno-Savín; Lía Celina Méndez-Rodríguez; Alfonso Enrique Bencomo-Alvarez; Alisa Thiede; Todd M. O’Hara. 2019. "Using carbon and nitrogen stable isotope modelling to assess dietary mercury exposure for pregnant women in Baja California Sur, Mexico." Chemosphere 234, no. : 702-714.
Carmen Rodríguez-Jaramillo; Miguel Victor Cordoba-Matson; Tania Zenteno-Savin; Eduardo F. Balart; Lia Mendez-Rodriguez; Juan Antonio De-Anda-Montañez. Reproductive Biology of the Red Crab Pleuroncodes planipes (Anomuran, Galatheid) on the West Coast of the Baja California Peninsula, Mexico. Journal of Shellfish Research 2018, 37, 1093 -1102.
AMA StyleCarmen Rodríguez-Jaramillo, Miguel Victor Cordoba-Matson, Tania Zenteno-Savin, Eduardo F. Balart, Lia Mendez-Rodriguez, Juan Antonio De-Anda-Montañez. Reproductive Biology of the Red Crab Pleuroncodes planipes (Anomuran, Galatheid) on the West Coast of the Baja California Peninsula, Mexico. Journal of Shellfish Research. 2018; 37 (5):1093-1102.
Chicago/Turabian StyleCarmen Rodríguez-Jaramillo; Miguel Victor Cordoba-Matson; Tania Zenteno-Savin; Eduardo F. Balart; Lia Mendez-Rodriguez; Juan Antonio De-Anda-Montañez. 2018. "Reproductive Biology of the Red Crab Pleuroncodes planipes (Anomuran, Galatheid) on the West Coast of the Baja California Peninsula, Mexico." Journal of Shellfish Research 37, no. 5: 1093-1102.
We have examined enterococci concentrations in water and sand (dry and wet) at three semi-arid subtropical recreational beaches to assess public health risks. To determine the concentration of enterococci, water and sand samples were collected before, during and after the Easter Week (when the largest influx of users occurs), and in the wintertime. The lowest concentrations (< 100 MPN 100 ml-1) were recorded before the Easter Week, the highest concentrations (> 1500 MPN 100 ml-1) during and after the Easter Week, and concentrations < 500 MPN 100 ml-1 in the wintertime. Enterococci concentrations in sand were generally < 200 MPN 100 ml-1. Variability in enterococci concentrations can be explained by the influx of users during the Easter Week, rainfall runoff and the increase in water temperature after the Easter Week, as well as by winds and the presence of dogs and birds in the wintertime. The highest health risks occur during and after the Easter Week.
Claudia Esmeralda León-López; José Alfredo Arreola-Lizárraga; Gustavo Padilla-Arredondo; Jorge Eduardo Chávez-Villalba; Renato Arturo Mendoza-Salgado; Lía Celina Méndez-Rodríguez; Jaqueline García-Hernández. Temporal variability of enterococci and associated sources at three subtropical recreational beaches. Oceanological and Hydrobiological Studies 2018, 47, 327 -336.
AMA StyleClaudia Esmeralda León-López, José Alfredo Arreola-Lizárraga, Gustavo Padilla-Arredondo, Jorge Eduardo Chávez-Villalba, Renato Arturo Mendoza-Salgado, Lía Celina Méndez-Rodríguez, Jaqueline García-Hernández. Temporal variability of enterococci and associated sources at three subtropical recreational beaches. Oceanological and Hydrobiological Studies. 2018; 47 (4):327-336.
Chicago/Turabian StyleClaudia Esmeralda León-López; José Alfredo Arreola-Lizárraga; Gustavo Padilla-Arredondo; Jorge Eduardo Chávez-Villalba; Renato Arturo Mendoza-Salgado; Lía Celina Méndez-Rodríguez; Jaqueline García-Hernández. 2018. "Temporal variability of enterococci and associated sources at three subtropical recreational beaches." Oceanological and Hydrobiological Studies 47, no. 4: 327-336.
Breast milk contains micronutrients that function as cofactors of antioxidant enzymes. High concentrations of iron (Fe) and copper (Cu) can increase the production of reactive oxygen species (ROS). This study aimed to assess the relationship between the activity of antioxidant enzymes (superoxide dismutase (SOD), catalase, glutathione peroxidase (GPx), glutathione reductase (GR) and glutathione S-transferase (GST)) and the concentration of the micronutrients Fe, Cu and zinc (Zn) in breast milk. Breast milk samples were collected from 108 mothers (7-10 days postpartum, transitional milk). The samples were grouped into three groups according to the number of pregnancies (one, two and three or more pregnancies), also grouped according to the body mass index (BMI) suggested by the World Health Organization (WHO) in underweight, normal weight, overweight and obese. Breast milk Fe, Cu and Zn concentrations were determined by atomic absorption spectrophotometry and the activity of the antioxidant enzymes was determined by spectrophotometry. An increase in GPx, SOD and GST activities in relation to the number of pregnancies was found (p = 0.05, p = 0.04 and p < 0.01, respectively). An inverse relationship between GST activity and BMI was found (p = 0.05). A positive correlation was observed between Cu and Zn concentrations (r = 0.52, p < 0.05). A negative correlation was found between Cu concentration and catalase activity (r = - 0.22, p < 0.05); Fe content was negatively correlated with GPx and GST activities (r = - 0.32, r = - 0.22, respectively, p < 0.05). The activities of antioxidant enzymes (GPx, SOD and GST) may be affected by the number of pregnancies and contribute to prevent oxidation of nutritional molecules in breast milk.
Patricia Carolina Castillo-Castañeda; Adolfo García-González; Alfonso Enrique Bencomo-Alvarez; Patricio Barros-Nuñez; Ramón Gaxiola-Robles; Lía Celina Méndez-Rodríguez; Tania Zenteno-Savín. Micronutrient content and antioxidant enzyme activities in human breast milk. Journal of Trace Elements in Medicine and Biology 2018, 51, 36 -41.
AMA StylePatricia Carolina Castillo-Castañeda, Adolfo García-González, Alfonso Enrique Bencomo-Alvarez, Patricio Barros-Nuñez, Ramón Gaxiola-Robles, Lía Celina Méndez-Rodríguez, Tania Zenteno-Savín. Micronutrient content and antioxidant enzyme activities in human breast milk. Journal of Trace Elements in Medicine and Biology. 2018; 51 ():36-41.
Chicago/Turabian StylePatricia Carolina Castillo-Castañeda; Adolfo García-González; Alfonso Enrique Bencomo-Alvarez; Patricio Barros-Nuñez; Ramón Gaxiola-Robles; Lía Celina Méndez-Rodríguez; Tania Zenteno-Savín. 2018. "Micronutrient content and antioxidant enzyme activities in human breast milk." Journal of Trace Elements in Medicine and Biology 51, no. : 36-41.
The Mexican coastal area is made up of a mosaic of scenes along a coastline of ~11,200 km where estuaries and coastal lagoons represent an integral and important part with ~15,673 km2 of surface area. This contribution summarizes and integrates information from these ecosystems on the factors that explain its diversity, knowledge of environmental condition in terms of eutrophication and contamination by trace elements, and conservation efforts considering protected areas decreed and presents opportunities and challenges for research, conservation, and management. Diversity estuaries and coastal lagoons are explained by the influence of different climatic regions, geologic origins, tide conditions, precipitation rates, rates of evaporation, wind patterns, and water masses. These systems exhibit a spectrum of environmental conditions from pristine to eutrophication and pollution problems. The challenge is to establish a national program of estuaries and coastal lagoons that allows to integrate and systematize the knowledge gained as well as an agenda of research, monitoring, and management of selected and representative systems of all regions of the country, where the coastal lagoons that are already part of natural protected areas can be part of this selection.
José Alfredo Arreola-Lizárraga; Gustavo Padilla-Arredondo; Thelma Michelle Ruiz-Ruiz; Luz María Cruz-García; Lia Mendez-Rodriguez; Pablo Hernández-Almaraz; Héctor Hugo Vargas-González. Estuaries and Coastal Lagoons of Mexico: Challenges for Science, Management, and Conservation. Mexican Natural Resources Management and Biodiversity Conservation 2018, 251 -283.
AMA StyleJosé Alfredo Arreola-Lizárraga, Gustavo Padilla-Arredondo, Thelma Michelle Ruiz-Ruiz, Luz María Cruz-García, Lia Mendez-Rodriguez, Pablo Hernández-Almaraz, Héctor Hugo Vargas-González. Estuaries and Coastal Lagoons of Mexico: Challenges for Science, Management, and Conservation. Mexican Natural Resources Management and Biodiversity Conservation. 2018; ():251-283.
Chicago/Turabian StyleJosé Alfredo Arreola-Lizárraga; Gustavo Padilla-Arredondo; Thelma Michelle Ruiz-Ruiz; Luz María Cruz-García; Lia Mendez-Rodriguez; Pablo Hernández-Almaraz; Héctor Hugo Vargas-González. 2018. "Estuaries and Coastal Lagoons of Mexico: Challenges for Science, Management, and Conservation." Mexican Natural Resources Management and Biodiversity Conservation , no. : 251-283.
The mining activity in the San Antonio-El Triunfo district, located in a mountainous region at 60 km southeast of La Paz, occured for more than 250 years and left behind severe contamination of soils and riverbed sediments which led to elevated concentrations of arsenic and other trace elements in the surface- and groundwater of the region. Although the main mining activity ended around 1911, contamination is still beeing distributed, especially from left behind tailings and mine waste piles. The contamination levels in the groundwater have been reported in several studies, but there is little information available on the surface water quality, and especially the temporal variation. In this study, we analyzed the surface water of the La Junta creek, in the southern part of the San Antonio-El Triunfo mining district. The working hypothesis was that by means of a spatial analysis of surface water and shallow groundwater, in combination with the temporal observation of the concentrations in runoff water, the effects of different sources of arsenic (natural geogene anomalies, due to historic mining activity, and hydrothermal related impact) in the La Junta creek can be recognized. This present study revealed that historic mining activity caused a mojor impact of arsenic but less contamination was observed than in the northern part of the district and elevated arsenic concentrations in stream water generally occurred during times of low streamflow.
Jobst Wurl; Miguel Imaz Lamadrid; Lía Mendez-Rodriguez; Baudilio Acosta Vargas. Arsenic Concentration in the Surface Water of a Former Mining Area: The La Junta Creek, Baja California Sur, Mexico. International Journal of Environmental Research and Public Health 2018, 15, 437 .
AMA StyleJobst Wurl, Miguel Imaz Lamadrid, Lía Mendez-Rodriguez, Baudilio Acosta Vargas. Arsenic Concentration in the Surface Water of a Former Mining Area: The La Junta Creek, Baja California Sur, Mexico. International Journal of Environmental Research and Public Health. 2018; 15 (3):437.
Chicago/Turabian StyleJobst Wurl; Miguel Imaz Lamadrid; Lía Mendez-Rodriguez; Baudilio Acosta Vargas. 2018. "Arsenic Concentration in the Surface Water of a Former Mining Area: The La Junta Creek, Baja California Sur, Mexico." International Journal of Environmental Research and Public Health 15, no. 3: 437.
Excess supply of nutrients of anthropogenic origin is one of the main drivers of global change that is affecting the ecological function and provision of ecosystem services by coastal wetlands. This study examines the response of a subtropical semi-arid coastal lagoon to anthropogenic nutrient input, through the use and comparison of eutrophication indices and models, and compares the usefulness of such methods to identify eutrophication symptoms. The Lobos Lagoon is located on the eastern coast of the Gulf of California and receives agricultural and urban wastewater discharges. To identify potential eutrophication symptoms, the Trophic IndeX (TRIX), the Arid Zone Coastal Water Quality Index (AZCI) along with the Assessment of Estuarine Trophic Status (ASSETS) model were used. Lobos Lagoon was found to have good environmental condition; however eutrophication symptoms were identified in the zone where untreated urban and agricultural wastewaters are discharged. Results obtained using the three methods were consistent and, thus, their performance can be considered as good and complementary, and can be used to evaluate the extent of eutrophication in subtropical semi-arid coastal lagoons.
Thelma M. Ruiz-Ruiz; José A. Arreola-Lizárraga; Lourdes Morquecho; Lia Mendez-Rodriguez; Aída Martínez-López; Renato A. Mendoza-Salgado. Detecting Eutrophication Symptoms in a Subtropical Semi-Arid Coastal Lagoon by Means of Three Different Methods. Wetlands 2017, 37, 1105 -1118.
AMA StyleThelma M. Ruiz-Ruiz, José A. Arreola-Lizárraga, Lourdes Morquecho, Lia Mendez-Rodriguez, Aída Martínez-López, Renato A. Mendoza-Salgado. Detecting Eutrophication Symptoms in a Subtropical Semi-Arid Coastal Lagoon by Means of Three Different Methods. Wetlands. 2017; 37 (6):1105-1118.
Chicago/Turabian StyleThelma M. Ruiz-Ruiz; José A. Arreola-Lizárraga; Lourdes Morquecho; Lia Mendez-Rodriguez; Aída Martínez-López; Renato A. Mendoza-Salgado. 2017. "Detecting Eutrophication Symptoms in a Subtropical Semi-Arid Coastal Lagoon by Means of Three Different Methods." Wetlands 37, no. 6: 1105-1118.
Héctor Hugo Vargas González; José Alfredo Arreola Lizárraga; Jaqueline García Hernández; Renato Arturo Mendoza Salgado; Tania Zenteno Savín; Lía Celina Méndez Rodríguez. CALIDAD DE SEDIMENTOS ASOCIADA A ACTIVIDADES ANTR?PICAS EN LAGUNAS COSTERAS SEMI?RIDAS SUBTROPICALES DE LA COSTA CENTRAL ESTE DEL GOLFO DE CALIFORNIA. Revista Internacional de Contaminación Ambiental 2017, 33, 7 -22.
AMA StyleHéctor Hugo Vargas González, José Alfredo Arreola Lizárraga, Jaqueline García Hernández, Renato Arturo Mendoza Salgado, Tania Zenteno Savín, Lía Celina Méndez Rodríguez. CALIDAD DE SEDIMENTOS ASOCIADA A ACTIVIDADES ANTR?PICAS EN LAGUNAS COSTERAS SEMI?RIDAS SUBTROPICALES DE LA COSTA CENTRAL ESTE DEL GOLFO DE CALIFORNIA. Revista Internacional de Contaminación Ambiental. 2017; 33 (esp02):7-22.
Chicago/Turabian StyleHéctor Hugo Vargas González; José Alfredo Arreola Lizárraga; Jaqueline García Hernández; Renato Arturo Mendoza Salgado; Tania Zenteno Savín; Lía Celina Méndez Rodríguez. 2017. "CALIDAD DE SEDIMENTOS ASOCIADA A ACTIVIDADES ANTR?PICAS EN LAGUNAS COSTERAS SEMI?RIDAS SUBTROPICALES DE LA COSTA CENTRAL ESTE DEL GOLFO DE CALIFORNIA." Revista Internacional de Contaminación Ambiental 33, no. esp02: 7-22.
Resumen Introduction: Breast milk contains molecules needed for the development of children; the integrity and function of these molecules is affected by the presence of pro-oxidants. Protein carbonyls are mainly produced as a result of the interaction of metals with reactive oxygen species (ROS), which may initiate a chain reaction that promotes molecular oxidation. Objective: This study aimed to determine the association between the concentration of protein carbonyls with the concentration of trace elements (lead [Pb], cadmium [Cd] and selenium [Se]), superoxide radical (O2•-) production, and glutathione (GSH) content, as well with the activity of the main antioxidant enzymes (superoxide dismutase [SOD], catalase [CAT], glutathione peroxidase [GPx], glutathione reductase [GR] and glutathione S-transferase [GST]) in breast milk.Methods :In this study 108 transitional milk samples (7-10 days) were analyzed. Antioxidant enzyme activities, O2•-production, protein carbonyl and GSH concentrations were analyzed by spectrophotometry. Trace element concentration was quantified by atomic absorption spectrophotometry. Generalized linear modelling was used to assess the relationship between protein carbonyls concentration with oxidative stress indicators and trace elements concentration.Results: Cd and Pb were detected in 21.3 and 55.6% of breast milk samples, respectively. The median concentration of Cd was 0.01 µg L-1 (0.01-3.52 µg L-1) and Pb concentration was 2.61 µg L-1 (0.08-195.20 µg L-1). According to the best-fit model, the main factors contributing to protein carbonyl concentrations were the activity of GPx, GR, and concentration of GSH, Se, Pb and Cd.Conclusions: According to the generalized linear model, the activity of GPx and GR, could help explain protein oxidation induced by Pb and Cd in breast milk.
Patricia Carolina Castillo-Castañeda; Ramón Gaxiola-Robles; Vanessa Labrada-Martagón; Baudilio Acosta Vargas; Lía Celina Méndez-Rodríguez; Tania Zenteno-Savín. Oxidative damage to proteins related to metals and antioxidant defenses in breastmilk. Nutrición Hospitalaria 2017, 34, 59 .
AMA StylePatricia Carolina Castillo-Castañeda, Ramón Gaxiola-Robles, Vanessa Labrada-Martagón, Baudilio Acosta Vargas, Lía Celina Méndez-Rodríguez, Tania Zenteno-Savín. Oxidative damage to proteins related to metals and antioxidant defenses in breastmilk. Nutrición Hospitalaria. 2017; 34 (1):59.
Chicago/Turabian StylePatricia Carolina Castillo-Castañeda; Ramón Gaxiola-Robles; Vanessa Labrada-Martagón; Baudilio Acosta Vargas; Lía Celina Méndez-Rodríguez; Tania Zenteno-Savín. 2017. "Oxidative damage to proteins related to metals and antioxidant defenses in breastmilk." Nutrición Hospitalaria 34, no. 1: 59.
Several characteristics of Totoaba macdonaldi Perciformes: Sciaenidae, including migratory movements along temperature gradients make it vulnerable to oxidative stress. Oxidative stress can also be associated with reproduction. The objectives of the present study were to examine oxidative stress indicators in liver of totoaba throughout the seasons (spring, autumn and winter), and the associated fluctuations in superficial sea temperature (SST, °C), as well as to evaluate possible variations between sexes and reproductive maturity stages. A total of 173 liver samples from totoaba captured in the Gulf of California, Mexico, were obtained from April 2010 to February 2013. Superoxide radical production (O2•−), lipid peroxidation (TBARS) levels, and activity of antioxidant enzymes; superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR) and glutathione S-transferase (GST) were quantified spectrophotometrically. Generalized linear models (GLM) were used to determine which factors contribute to explain O2•− production and TBARS levels. The significant predictive variables were the seasons, which were significant in all applied models, as well as SOD and CAT activities. In general, enzyme activity was higher in immature totoaba; this was not seasonally modified. Low temperatures in winter were associated with high O2•− production and TBARS levels, particularly in totoaba that are not yet reproductively mature. Seasonal changes in sea surface temperature did not affect the oxidative stress indicators in mature totoaba (both males and females); this suggests that mature totoaba are less sensitive to temperature changes from an oxidative stress perspective.
Sandra Berenice Hernández-Aguilar; Tania Zenteno-Savin; Juan Antonio De-Anda-Montañez; Lia Celina Méndez-Rodríguez. Temporal variation in oxidative stress indicators in liver of totoaba (Totoaba macdonaldi) Perciformes: Sciaenidae. Journal of the Marine Biological Association of the United Kingdom 2017, 98, 833 -844.
AMA StyleSandra Berenice Hernández-Aguilar, Tania Zenteno-Savin, Juan Antonio De-Anda-Montañez, Lia Celina Méndez-Rodríguez. Temporal variation in oxidative stress indicators in liver of totoaba (Totoaba macdonaldi) Perciformes: Sciaenidae. Journal of the Marine Biological Association of the United Kingdom. 2017; 98 (4):833-844.
Chicago/Turabian StyleSandra Berenice Hernández-Aguilar; Tania Zenteno-Savin; Juan Antonio De-Anda-Montañez; Lia Celina Méndez-Rodríguez. 2017. "Temporal variation in oxidative stress indicators in liver of totoaba (Totoaba macdonaldi) Perciformes: Sciaenidae." Journal of the Marine Biological Association of the United Kingdom 98, no. 4: 833-844.
Understanding the susceptibility of coastal ecosystems to nutrient loads from anthropogenic sources and the extent of eutrophication in subtropical and tropical estuaries is still a challenge. This study assessed eutrophication in Guaymas Bay, a subtropical lagoon that receives nutrient-rich urban wastewater discharges. Eutrophication was evaluated by means of the Assessment of Estuarine Trophic Status model. Our results showed that the trophic status of Guaymas Bay was “good.” It is important to consider that: (1) the dissolved oxygen and chlorophyll a levels observed are indicative of a healthy ecosystem, and (2) the key factors explaining this finding are the high susceptibility to eutrophication of the lagoon and the dominance of macroalgae species that respond to nutrient enrichment. This implies that the Overall Eutrophic Condition Index of the Assessment of Estuarine Trophic Status model is a valuable tool for use as an eutrophication indicator based on the abundance of primary producers (macroalgae and phytoplankton). One source of uncertainty in the application of the model to this semi-arid coastal lagoon deals with estimating its susceptibility to eutrophication. The model showed that the lagoon is a highly sensitive ecosystem; however, significant factors are in place, such as an adequate water exchange, that reduce its susceptibility to eutrophication. In conclusion, the trophic status observed at Guaymas Bay is acceptable; however, an environmental management plan is necessary to prevent any adverse effects of eutrophication.
Thelma M. Ruiz-Ruiz; José A. Arreola-Lizárraga; Lourdes Morquecho; Renato A. Mendoza-Salgado; Aída Martínez-López; Lia Mendez-Rodriguez; Javier Enríquez-Flores. Assessment of eutrophication in a subtropical lagoon in the Gulf of California. Aquatic Ecosystem Health & Management 2016, 19, 382 -392.
AMA StyleThelma M. Ruiz-Ruiz, José A. Arreola-Lizárraga, Lourdes Morquecho, Renato A. Mendoza-Salgado, Aída Martínez-López, Lia Mendez-Rodriguez, Javier Enríquez-Flores. Assessment of eutrophication in a subtropical lagoon in the Gulf of California. Aquatic Ecosystem Health & Management. 2016; 19 (4):382-392.
Chicago/Turabian StyleThelma M. Ruiz-Ruiz; José A. Arreola-Lizárraga; Lourdes Morquecho; Renato A. Mendoza-Salgado; Aída Martínez-López; Lia Mendez-Rodriguez; Javier Enríquez-Flores. 2016. "Assessment of eutrophication in a subtropical lagoon in the Gulf of California." Aquatic Ecosystem Health & Management 19, no. 4: 382-392.
The aim of the study was to evaluate the dynamic of cadmium, lead, copper, zinc, and iron among lower trophic levels, sea urchins and macroalgae. Diets and isotopic values were used in combination to explore trophic positions and potential transference of metals from primary producers to consumers. Concentrations of trace elements were measured in two species of sea urchin (Tripneustes depressus and Eucidaris thouarsii) and nine macroalgae that are usually used as food in four Sargassum beds, one of which is close to a phosphorite mine. Specimens were collected when Sargassum fronds were at their greatest (winter) and lowest (summer) abundance. Highest concentrations of Cd, and Cu in both urchin species were recorded in winter at the site near the phosphorite mine. Concentrations of Pb in T. depressus were below the detectable limit, whereas E. thouarsii, which in addition to a high concentration of Pb, had high amounts of Cu and Zn. Gut content analysis, indicates that the diet of both sea urchins at the four sites and two collection dates is mainly macroalgae. The δ15N isotopic values in sea urchins in a typical Sargassum bed were in good agreement with a diet dominated by macroalgae, with T. depressus having herbivorous habits and E. thouarsii having omnivorous habits in this environment. We found macroalgae important in the dynamics of metals in food webs, potentially contributing to transferring Cd, Cu, and Zn to key invertebrate species, such as sea urchins, indicating connectivity of food webs and ecological structuring of marine environments.
Pablo Hernández-Almaraz; Lia Mendez-Rodriguez; Tania Zenteno-Savín; Todd M. O’Hara; John R. Harley; Elisa Serviere-Zaragoza. Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer. Ecological Research 2016, 31, 785 -798.
AMA StylePablo Hernández-Almaraz, Lia Mendez-Rodriguez, Tania Zenteno-Savín, Todd M. O’Hara, John R. Harley, Elisa Serviere-Zaragoza. Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer. Ecological Research. 2016; 31 (6):785-798.
Chicago/Turabian StylePablo Hernández-Almaraz; Lia Mendez-Rodriguez; Tania Zenteno-Savín; Todd M. O’Hara; John R. Harley; Elisa Serviere-Zaragoza. 2016. "Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer." Ecological Research 31, no. 6: 785-798.
The coyote (Canis latrans) is one of the most widely distributed and opportunistic carnivores in North America. It feeds on a variety of different species, ranging from small- (rodents) to medium-sized mammals (Lagomorpha), reptiles, and birds. Among sea turtles, the main species nesting on the coasts of Baja California is Lepidochelys olivacea. Solitary turtles arrive to beaches in low numbers. The aim of this study was to assess the effect of coyote predation on sea turtle nests on pristine beaches of Baja California Sur, Mexico. Of a total of 43 nests observed, 34 (79.1%) were considered as recent, and 9 (20.9%) as old nests; of these, 35 (81.4%) and 8 (18.6%) showed evidence of digging/not digging by predators, respectively. Eggshells were observed around and inside all preyed upon nest holes. Coyotes should be considered an important predator of turtle nests in the Baja California Peninsula
Lia Mendez-Rodriguez; Sergio Ticul Álvarez-Castañeda. Predation on turtle nests in the southwestern coast of the Baja California Peninsula. Revista Mexicana de Biodiversidad 2016, 87, 483 -488.
AMA StyleLia Mendez-Rodriguez, Sergio Ticul Álvarez-Castañeda. Predation on turtle nests in the southwestern coast of the Baja California Peninsula. Revista Mexicana de Biodiversidad. 2016; 87 (2):483-488.
Chicago/Turabian StyleLia Mendez-Rodriguez; Sergio Ticul Álvarez-Castañeda. 2016. "Predation on turtle nests in the southwestern coast of the Baja California Peninsula." Revista Mexicana de Biodiversidad 87, no. 2: 483-488.
Areas where abandoned metal-extraction mines are located contain large quantities of mineral wastes derived from environmentally unsafe mining practices. These wastes contain many pollutants, such as heavy metals, which could be released to the environment through weathering and leaching, hence becoming an important source of environmental metal pollution. This study evaluates differences in the levels of lead, iron, nickel, manganese, copper and cadmium in rodents sharing the same type of diet under different microhabitat use in arid areas with past mining activities. Samples of soil, roots, branches and seeds of () and specimens of two rodent species ( and ) were collected in areas with impact from past metal mining activities as well as from areas with no mining impact. Both rodent species mirrored nickel and iron levels in soil and seeds, as well as lead levels in soil; however, accumulated higher levels of manganese, copper and cadmium.
Lia Mendez-Rodriguez; Sergio Ticul Álvarez-Castañeda. Assessment of Trace Metals in Soil, Vegetation and Rodents in Relation to Metal Mining Activities in an Arid Environment. Bulletin of Environmental Contamination and Toxicology 2016, 97, 44 -49.
AMA StyleLia Mendez-Rodriguez, Sergio Ticul Álvarez-Castañeda. Assessment of Trace Metals in Soil, Vegetation and Rodents in Relation to Metal Mining Activities in an Arid Environment. Bulletin of Environmental Contamination and Toxicology. 2016; 97 (1):44-49.
Chicago/Turabian StyleLia Mendez-Rodriguez; Sergio Ticul Álvarez-Castañeda. 2016. "Assessment of Trace Metals in Soil, Vegetation and Rodents in Relation to Metal Mining Activities in an Arid Environment." Bulletin of Environmental Contamination and Toxicology 97, no. 1: 44-49.
This study examines the potential public health risk due to the massive use of organochlorine pesticides (OCs) in agriculture in the Gulf of California. Specimens of the clam Chione californiensis were collected from three coastal lagoons (Yavaros, Altata and Reforma). Sites were classified as polluted/nonpolluted based on the presence/absence of OCs as an indicator of the persistence of these pollutants; in polluted sites, the time elapsed since pesticide application (past or recent) was estimated. Screening values (SV) for protecting human health as per the U.S. Environmental Protection Agency (EPA) were used for risk assessment. OCs detected were ranked according to frequency of occurrence as follows: γ-chlordane (75%) > endrin (54%) > aldrin (48%) > heptachlor, and dichlorodiphenyl-trichloroethane (DDE) (37%) > β-heptachlor epoxide (30%) > lindane (α-BHC, δ-BHC) and endosulphan I (≤ 6%). Specifically, OCs detected at the highest concentration were heptachlor in Yavaros (0.0168 µgg(-1)) and Altata (0.0046 µgg(-1)), and aldrin in Reforma (0.0019 µgg(-1)). β-Heptachlor epoxide in Altata and Reforma was the only OC with a concentration exceeding the EPA Screening Value. From our results and based on the monthly consumption limit set forth by EPA, the maximum safe consumption of clams to avoid a carcinogenic risk derived from β-heptachlor epoxide in the fishing villages of Yavaros and Altata is 4 servings per month (1 serving = 0.227 kg) by a 70-kg person. These findings suggest that concentrations of OCs and their isomers in C. californiensis populations reflect environmental persistence as well as recent inputs of OCs into coastal lagoons in the Gulf of California.
Héctor H. Vargas-González; Lia Mendez-Rodriguez; Jaqueline García-Hernández; Renato A. Mendoza-Salgado; Tania Zenteno-Savín; José A. Arreola-Lizárraga. Persistent organic pollutants (POPs) in populations of the clam C hione californiensis in coastal lagoons of the Gulf of California. Journal of Environmental Science and Health, Part B 2016, 51, 1 -11.
AMA StyleHéctor H. Vargas-González, Lia Mendez-Rodriguez, Jaqueline García-Hernández, Renato A. Mendoza-Salgado, Tania Zenteno-Savín, José A. Arreola-Lizárraga. Persistent organic pollutants (POPs) in populations of the clam C hione californiensis in coastal lagoons of the Gulf of California. Journal of Environmental Science and Health, Part B. 2016; 51 (7):1-11.
Chicago/Turabian StyleHéctor H. Vargas-González; Lia Mendez-Rodriguez; Jaqueline García-Hernández; Renato A. Mendoza-Salgado; Tania Zenteno-Savín; José A. Arreola-Lizárraga. 2016. "Persistent organic pollutants (POPs) in populations of the clam C hione californiensis in coastal lagoons of the Gulf of California." Journal of Environmental Science and Health, Part B 51, no. 7: 1-11.
Resumen Introducción: los plaguicidas organoclorados (POC) pueden incrementar la producción de especies reactivas de oxígeno (ERO). Tales efectos pueden ser contrarrestados por el sistema antioxidante, el cual se encuentra también en la leche materna. Objetivo: evaluar los indicadores de estrés oxidativo en leche materna asociados a la presencia de POC y su relación con la ingesta de alimentos marinos. Métodos: la leche materna fue colectada de 108 mujeres lactantes. Los indicadores de estrés oxidativo (actividad enzimática antioxidante, concentración de glutatión, producción de radical superóxido [O 2•- ], concentración de peroxidación de lípidos y carbonilos proteicos) se analizaron por espectrofotometría. Las concentraciones de POC se midieron por cromatografía de gases. Resultados y discusión: la producción de O 2•- no presentó relación significativa con las concentraciones de POC. Se encontraron correlaciones significativas entre las concentraciones de POC y la actividad de las enzimas antioxidantes (actividad de glutatión reductasa [GR] y concentración de aldrín [r = - 0,5], actividad de superóxido dismutasa [SOD] y concentración de α-HCH [r = 0,45]). El daño oxidativo mostró baja correlación con el contenido de POC (r < 0,30, p < 0,05). Es posible que los niveles de POC no sean suficientes para incrementar la producción de O 2•- , ya sea que el incremento en la producción de ERO se deba a especies reactivas diferentes a O 2•- o debido a que la capacidad antioxidante es suficiente para evitar el daño oxidativo en leche materna. Conclusión: los resultados de este estudio sugieren que la dieta marina no es un factor determinante en el nivel de contaminación por POC, ni en el daño oxidativo presente en leche materna.
Patricia Carolina Castillo-Castañeda; Ramón Gaxiola-Robles; Lía Celina Méndez-Rodríguez; Vanessa Labrada-Martagón; Tania Zenteno-Savín. Antioxidantes, especies reactivas de oxígeno y daño oxidativo asociado a la presencia de plaguicidas organoclorados en la leche materna. Nutrición Hospitalaria 2016, 33, 1 .
AMA StylePatricia Carolina Castillo-Castañeda, Ramón Gaxiola-Robles, Lía Celina Méndez-Rodríguez, Vanessa Labrada-Martagón, Tania Zenteno-Savín. Antioxidantes, especies reactivas de oxígeno y daño oxidativo asociado a la presencia de plaguicidas organoclorados en la leche materna. Nutrición Hospitalaria. 2016; 33 (2):1.
Chicago/Turabian StylePatricia Carolina Castillo-Castañeda; Ramón Gaxiola-Robles; Lía Celina Méndez-Rodríguez; Vanessa Labrada-Martagón; Tania Zenteno-Savín. 2016. "Antioxidantes, especies reactivas de oxígeno y daño oxidativo asociado a la presencia de plaguicidas organoclorados en la leche materna." Nutrición Hospitalaria 33, no. 2: 1.
The hydrological characteristics and the rate of organic matter supply from coastal lagoons help to understand their responses to nutrient input by anthropogenic and natural sources. The aim of this study was to determine the hydrologic and trophic status of the El Rancho-Empalme lagoon system in a semiarid region in the Gulf of California, Mexico. This lagoon system consists of two geomorphological subsystems which are affected by nutrient inputs from shrimp farm effluents and coastal upwelling. Sampling was conducted over the course of one year and included measurements of temperature, salinity, and dissolved oxygen, surface water grab samples to analyze nitrite, nitrate, ammonia, orthophosphate, and chlorophyll a. The trophic status was assessed using the TRophic IndeX (TRIX). The subsystems El Rancho and Empalme had a similar hydrological behavior throughout the year, reflecting a good exchange of water, materials and energy. The TRIX index showed oligotrophic state during spring, summer and autumn, and a mesotrophic state in winter. Nutrient inputs from shrimp farm effluents were not responsible for trophic status increases, however, coastal upwelling in the region plays an important role in the growing rate of seasonal supply of organic matter to these coastal lagoons.
José Alfredo Arreola-Lizárraga; Gustavo Padilla-Arredondo; Julio Medina-Galván; Lía Méndez-Rodríguez; Renato Mendoza-Salgado; Miguel V. Cordoba-Matson. Analysis of hydrobiological responses to anthropogenic and natural influences in a lagoon system in the Gulf of California. Oceanological and Hydrobiological Studies 2016, 45, 112 -120.
AMA StyleJosé Alfredo Arreola-Lizárraga, Gustavo Padilla-Arredondo, Julio Medina-Galván, Lía Méndez-Rodríguez, Renato Mendoza-Salgado, Miguel V. Cordoba-Matson. Analysis of hydrobiological responses to anthropogenic and natural influences in a lagoon system in the Gulf of California. Oceanological and Hydrobiological Studies. 2016; 45 (1):112-120.
Chicago/Turabian StyleJosé Alfredo Arreola-Lizárraga; Gustavo Padilla-Arredondo; Julio Medina-Galván; Lía Méndez-Rodríguez; Renato Mendoza-Salgado; Miguel V. Cordoba-Matson. 2016. "Analysis of hydrobiological responses to anthropogenic and natural influences in a lagoon system in the Gulf of California." Oceanological and Hydrobiological Studies 45, no. 1: 112-120.