scholarly journals Persistent organic pollutants (POPs) in fish from two coastal lagoons of the central Mexican Pacific

2021 ◽  
Vol 49 (4) ◽  
pp. 663-670
Author(s):  
Eduardo Ramírez-Ayala ◽  
Miguel A. Arguello-Pérez ◽  
Adrián Tintos-Gómez ◽  
Jesús H. Hernández-Anguiano ◽  
Rebeca Y. Pérez-Rodríguez ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Potential Risk ◽  
Aquatic Ecosystems ◽  
Polyaromatic Hydrocarbons ◽  
Coastal Lagoons ◽  
Total Concentration ◽  
Carcinogenic Risk ◽  
Fishing Communities ◽  
Coastal Zones ◽  
Mexican Pacific

Mexico has a great variety of aquatic ecosystems; however, most of them present significant contamination levels. Despite the efforts to monitor toxic and bioaccumulative persistent pollutants, they are still insufficient and outdated data from Mexican coasts, especially in polychlorinated biphenyls (PCBs) and polyaromatic hydrocarbons (PAHs), due to the number of aquatic bodies that have received little or no attention. In this regard, the Mexican Pacific's coastal zones and their aquatic ecosystems monitoring PCBs and PAHs in biota is critical because it allows us to estimate the potential risk to human health. This work aimed to determine the total concentration of polychlorinated biphenyls (ΣPCBs) and total polyaromatic hydrocarbons (ΣPAHs) in the muscle of fish collected in two coastal lagoons of the central Mexican Pacific and to determine the non-carcinogenic risk ratio (HQ) based on the monthly per capita consumption of national fish and the consumption of fish associated with fishing communities in Mexico. It was found that the potential risk for fishing communities is considerably higher and correlates to the rate of fish consumption, highlighting their vulnerability to these contaminants.

scholarly journals Determination of the Bioaccumulative Potential Risk of Emerging Contaminants in Fish Muscle as an Environmental Quality Indicator in Coastal Lagoons of the Central Mexican Pacific

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2721
Author(s):  
Miguel Ángel Arguello-Pérez ◽  
Eduardo Ramírez-Ayala ◽  
Jorge Alberto Mendoza-Pérez ◽  
María Magdalena Monroy-Mendieta ◽  
Miguel Vázquez-Guevara ◽  
...  
Keyword(s):  
Human Health ◽  
Environmental Quality ◽  
Potential Risk ◽  
Quality Indicator ◽  
Emerging Contaminants ◽  
Coastal Lagoons ◽  
Fish Muscle ◽  
Rural Settlements ◽  
Mexican Pacific ◽  
Muscle Tissues

This research proposes an environmental quality indicator to detect, predict and scientifically evaluate the environmental impact generated by chemical substances within the pollutant group of nonsteroidal anti-inflammatory drugs (NSAIDs) that are categorized as emerging contaminants (ECs) with endocrine disruptive action. The present study was carried out in two coastal lagoons affected by wastewater produced by urban and rural settlements in the states of Colima and Jalisco. Four pharmaceutical compounds were analyzed: diclofenac, ibuprofen, ketorolac and naproxen. The muscle tissues of 14 fish species were analyzed; all had measurable concentrations of the four contaminants. The presence of the ECs was confirmed in all the samples collected. The bioaccumulative potential risk (BPR) of the ECs is estimated by calculating the environmental risk factors and the potential risks to human health, evaluating the concentration and assessing the risk involved in the incorporation of the pollutants into the environment. The BPR indicates the potential impact of NSAIDs on the ecology of these coastal lagoons, and predicts whether a contaminant is likely to act and persist in the environment and bioaccumulate in organisms. Additionally, it estimates the possibility of contamination and risks to human health caused by residues of the chemical contaminants.

Particulate light absorption and the prediction of phytoplankton biomass and planktonic metabolism in northeastern Spanish aquatic ecosystems

2000 ◽  
Vol 57 (1) ◽  
pp. 25-33 ◽  
Author(s):  
C M Duarte ◽  
S Agustí ◽  
J Kalff
Keyword(s):  
Absorption Coefficient ◽  
Light Absorption ◽  
Aquatic Ecosystems ◽  
Coastal Lagoons ◽  
Strong Relationship ◽  
Community Respiration ◽  
Chl A ◽  
Light Absorption Coefficient ◽  
Alpine Rivers ◽  
Detrital Particles

Examination of particulate light absorption and microplankton metabolism in 36 northeastern Spanish aquatic ecosystems, ranging from alpine rivers to inland saline lakes and the open Mediterranean Sea, revealed the existence of general relationships between particulate light absorption and the biomass of phytoplankton and microplankton metabolism. The particulate absorption spectra reflected a dominance of nonphotosynthetic, likely detrital, particles in rivers and a dominance of phytoplankton in coastal lagoons. There was a strong relationship between the light absorbed by phytoplankton and the chlorophyll a (Chl a) concentration of the systems, which indicated an average (±SE) Chl a specific absorption coefficient of 0.0233 ± 0.0020 m2·mg Chl a-1 for these widely diverse systems. Chl a concentration was a weaker predictor of the total particulate light absorption coefficient, pointing to an important role of nonphytoplanktonic particles in light absorption. Gross production was very closely related to the light absorption coefficient of phytoplankton, whereas community respiration was strongly correlated with the total particulate light absorption coefficient, indicating the optical signatures of sestonic particles to be reliable predictors of planktonic biomass and metabolism in aquatic ecosystems.

PCBs and PAHs Restrain the Use of Sludge as a Renewable Resource

2014 ◽  
Vol 1001 ◽  
pp. 162-170
Author(s):  
Radmila Kučerová ◽  
Tomáš Sezima ◽  
Eugen Sikora ◽  
Ivana Truxová ◽  
Lucie Kučerová ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Polychlorinated Biphenyls ◽  
Laboratory Experiment ◽  
Pseudomonas Putida ◽  
Polyaromatic Hydrocarbons ◽  
Renewable Resource ◽  
Bacterial Cultures ◽  
Pure Bacterial Cultures

The aim of this research is to reduce the quantities of polyaromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in the samples of non-hygienized sewage sludge via laboratory biodegradation. Pure bacterial cultures of Pseudomonas putida, Rhodococcus sp. and their mixture in 1:1 proportion have been used. The laboratory experiment lasted for 28 days and the acquired values were compared with Decree 294/2005 Coll. The obtained results imply that biodegradation of such contaminated samples is practicable. Using the bacterial mixture, over 85 % Σ of PCBs were degraded, and applying Rhodococcus sp. as much as 95.86 % of the original concentration of PAHs were removed.

Distribution patterns of the warrior swimming crab, Callinectes bellicosus, fishery in Bahía Magdalena, Baja California Sur, Mexico

Crustaceana ◽  
2019 ◽  
Vol 92 (11-12) ◽  
pp. 1279-1293 ◽  
Author(s):  
Juan C. Castro-Salgado ◽  
Mauricio Ramírez-Rodríguez ◽  
Gustavo-De la Cruz-Agüero ◽  
Verónica Castañeda-Fernández-de-Lara
Keyword(s):  
Gulf Of California ◽  
Coastal Lagoons ◽  
Warm Season ◽  
Distribution Patterns ◽  
Cold Season ◽  
Swimming Crab ◽  
Mexican Pacific ◽  
Temporal Behaviour ◽  
Average Size ◽  
Bahia Magdalena

Abstract Spatial and temporal distribution patterns of the warrior swimming crab Callinectes bellicosus fishery in the Mexican Pacific were investigated. Geo-referenced commercial trap capture data derived from 44 trips in the Bahia Magdalena were analysed. Three fishing zones (Z1, inner; Z2, middle; Z3, mouth of the bay) and two climate seasons (warm, July-December; and cold, January-June) were defined previously. There were 1099 traps in Z1, 715 in Z2 and 2111 in Z3; in the warm season, 2091 traps were checked, whereas 1834 were checked in the cold season. The average number of individuals per trap (CPUE) varied by sex, zone and season, however, male crabs always predominated. During the warm season, large males (CW > 115 mm) exhibited the greatest value of CPUE. On average, the males represented 77% during the warm season and 84% during the cold season. The average size of the males (125 ± 0.843 mm CW) was significantly higher than the average size of females (121 ± 1.140 mm CW). The catch was composed of large mature males but females were absent in Z1; in comparison, both large mature males and females, in addition to ovigerous females, composed the catch at the mouth of the bay (Z3). Crab abundance was notably reduced in the cold season, especially for female crabs. The temporal behaviour of the warrior swimming crab in Bahia Magdalena is similar to that reported from the coastal lagoons of the Gulf of California; however, the low presence of females throughout the year could be related to their preferred environmental conditions, which include deeper areas with more current circulation, like those that occur at the mouth of the bay. These data corroborate the necessity to interpret with caution the crab population dynamics solely based on results derived from fishing with traps in coastal lagoons.

scholarly journals Mortality in Yusho patients exposed to polychlorinated biphenyls and polychlorinated dibenzofurans: a 50-year retrospective cohort study

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Daisuke Onozuka ◽  
Yuko Nakamura ◽  
Gaku Tsuji ◽  
Masutaka Furue
Keyword(s):  
General Population ◽  
Polychlorinated Biphenyls ◽  
Carcinogenic Risk ◽  
Polychlorinated Dibenzofurans ◽  
Risk Of Mortality ◽  
Standardized Mortality Ratios ◽  
Optimum Management ◽  
Related Compounds ◽  
Related Mortality

Abstract Background In 1968, the Yusho incident resulted in accidental exposure to polychlorinated biphenyls (PCBs), polychlorinated dibenzofurans (PCDFs), and related compounds in Japan. This study updated the risk of mortality in Yusho patients. Methods We obtained updated cohort data for all Yusho patients for the period 1968–2017. We calculated standardized mortality ratios (SMRs) for all-cause and cause-specific mortality over a 50-year follow-up period compared with the general population in Japan. Results A total of 1664 Yusho patients with 63,566 person-years of follow up were included in the analysis. Among males, excess mortality was observed for all cancers (SMR: 1.22, 95% confidence interval [CI]: 1.02 to 1.45) and lung cancer (SMR: 1.59, 95% CI: 1.12 to 2.19). Among females, increased mortality was observed for liver cancer (SMR: 2.05, 95% CI: 1.02 to 3.67). No significant increase was seen in non-cancer-related mortality compared with the general population. Conclusions Carcinogenic risk in humans after exposure to PCBs and PCDFs remains higher among Yusho patients. Our findings suggest the importance of care engagement and optimum management to deal with the burden of Yusho disease.

Pesticides and Polychlorinated Biphenyls as Potential Risk Factors for Erectile Dysfunction

2006 ◽  
Vol 28 (1) ◽  
pp. 28-37 ◽  
Author(s):  
J. Y. Polsky ◽  
K. J. Aronson ◽  
J. P. W. Heaton ◽  
M. A. Adams
Keyword(s):  
Risk Factors ◽  
Erectile Dysfunction ◽  
Polychlorinated Biphenyls ◽  
Potential Risk ◽  
Potential Risk Factors

Laeonereis watsoni (Annelida, Nereididae), a new species from western Mexico

2017 ◽  
Vol 98 (6) ◽  
pp. 1347-1353 ◽  
Author(s):  
J. A. de León-González ◽  
N. Méndez ◽  
J. G. Navedo
Keyword(s):  
New Species ◽  
Coastal Lagoon ◽  
Anterior Margin ◽  
Pacific Coast ◽  
Coastal Lagoons ◽  
Relative Size ◽  
Mexican Pacific ◽  
Shrimp Farm ◽  
Western Mexico ◽  
A New Species

A new species of Laeonereis from a shrimp farm associated with a subtropical coastal lagoon on the Mexican Pacific coast is described. The new species is characterized by a deep anterior groove on the prostomium, which is shared only with L. culveri. However, longer tentacular cirri extending back to the anterior margin of chaetiger two, the number of papillae of each group on the maxillary ring of the pharynx, and the relative size of the homogomph falcigers in the new species, allow us to separate the two species. Although the species has not been previously detected in the coastal lagoon surrounding the shrimp farm, we postulate that L. watsoni n. sp. is likely to be part of the invertebrate communities of the upper parts of similar coastal lagoons that are common along the tropical coasts of Mexico.

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