Heavy Metals in the Edible Muscle of Shrimp from Coastal Lagoons Located in Northwest Mexico

The fishing effort of a Sinaloa crab fishery in the Gulf of California in 2014 was analysed based on fishermen’s interviews, official catches and permits, and information from a sample of fishing logbooks from five fishery cooperatives operating in four coastal lagoons that contained the daily catch from individual fishing trips. Unauthorized gear, a double-ring net (DR), was used most frequently (>70% of the fishers) for crab fishing, although authorized single-ring nets and Chesapeake traps (CT) were also used with low frequency. The estimated fishing effort was 641 boats/day in the four coastal lagoons, which was 34% more than authorized, and 818 boats/day were employed in all of Sinaloa. A total of 57 479 fishing gears were estimated for the study area, which was 49.9% greater than the maximum authorized number, and 80 822 nominal fishing gears were estimated for the entire Sinaloa crab fishery, 14.15% more than the total gear limit (70 800). The size of the mesh used in the gear was smaller than the authorized limit of 76 mm, and >50% of the catches included crabs of unlawful size. It is argued that the effort must be regulated in terms of the number of vessels, per unit time, and not the number of gears. The information from this study demonstrates a failure to monitor compliance with current regulations and thus means that other strategies for the sustainable management of the fishery, such as co-management, should be tested.

Download Full-text

Bioavailability of heavy metals in sediments of two coastal lagoons in Rio de Janeiro, Brazil

Hydrobiologia ◽

10.1007/bf00006477 ◽

1992 ◽

Vol 228 (1) ◽

pp. 65-70 ◽

Cited By ~ 48

Author(s):

L. D. Lacerda ◽

M. A. Fernandez ◽

C. F. Calazans ◽

K. F. Tanizaki

Keyword(s):

Heavy Metals ◽

Rio De Janeiro ◽

Coastal Lagoons

Download Full-text

Heavy metals in the benthic foraminifera from the coastal lagoons, Red Sea, Egypt: indicators of anthropogenic impact on environment (case study)

Environmental Geology ◽

10.1007/s00254-008-1529-0 ◽

2008 ◽

Vol 58 (3) ◽

pp. 543-553 ◽

Cited By ~ 17

Author(s):

Hashem Abbas Madkour ◽

Mohamed Youssef Ali

Keyword(s):

Heavy Metals ◽

Red Sea ◽

Benthic Foraminifera ◽

Anthropogenic Impact ◽

Coastal Lagoons

Download Full-text

Dissolved and particulate heavy metals distribution in coastal lagoons. A case study from Mar Chiquita Lagoon, Argentina

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2009.04.027 ◽

2009 ◽

Vol 85 (1) ◽

pp. 45-56 ◽

Cited By ~ 41

Author(s):

María Ornela Beltrame ◽

Silvia G. De Marco ◽

Jorge E. Marcovecchio

Keyword(s):

Heavy Metals ◽

Coastal Lagoons

Download Full-text

Mercury and selenium concentrations in the oysters Saccostrea palmula and Crassostrea corteziensis from four coastal lagoons of NW Mexico: health risk assessment

10.21203/rs.3.rs-1062204/v1 ◽

2021 ◽

Author(s):

Carlos Humberto Sepúlveda ◽

Maria Isabel Sotelo-Gonzalez ◽

Carmen Cristina Osuna-Martínez ◽

Manuel García-Ulloa ◽

Andrés Martín Góngora-Gómez ◽

...

Keyword(s):

Risk Assessment ◽

Coastal Lagoons ◽

Hazard Quotient ◽

Health Benefit ◽

Molar Ratio ◽

Northwest Mexico ◽

Drug Agency ◽

High Molar Ratio ◽

Wet Weight ◽

Crassostrea Corteziensis

Abstract Mercury (Hg) and selenium (Se) concentrations in the soft tissue of the oysters Saccostrea palmula and Crassostrea corteziensis from four coastal lagoons (Altata, Macapule, Navachiste, El Colorado) of Northwest Mexico were determined. A total of 2520 specimens of S. palmula and 3780 of C. corteziensis (72.15 ± 4.95 and 73.57 ± 5.31 mm, respectively) were sampled seasonally from summer 2019 to spring 2020. The higher Hg concentration (wet weight) for S. palmula (0.13 ± 0.03–0.11 ± 0.02 µg g−1) and C. corteziensis (0.12 ± 0.02–0.11 ± 0.03 µg g−1) were obtained in summer−autumn 2019; Hg level was similar among the coastal lagoons and did not exceed the limit established by Mexican legislation and by the Food and Drug Agency. The higher Se concentration occurred in spring 2020 for both oyster species in El Colorado lagoon (4.55 ± 0.02 and 4.08 ± 0.05 µg g−1, respectively). The Se/Hg molar ratio of S. palmula and C. corteziensis ranged from 48.76–149.59 and 31.72–155.37, respectively; while the Se health benefit value was 19.23–42.28 and 17.82–35.30, respectively. The hazard quotient for Hg -estimated as methylmercury- and Se in both species of oyster was below 1. The high molar ratio obtained (Se/Hg > 1) indicates that the concentration of Se was sufficient to neutralize the possible toxicity of the Hg, therefore, the consumption of S. palmula and C. corteziensis from the four coastal lagoons studied does not represent a risk.

Download Full-text

Chapter 8 Biogeochemistry of heavy Metals in Coastal Lagoons

Coastal Lagoon Processes - Elsevier Oceanography Series ◽

10.1016/s0422-9894(08)70013-8 ◽

1994 ◽

pp. 221-241 ◽

Cited By ~ 6

Author(s):

Luiz Drude De Lacerda

Keyword(s):

Heavy Metals ◽

Coastal Lagoons

Download Full-text

Metales pesados en agua y sedimentos de dos lagunas costeras de Tabasco, México / Heavy metals in water and sediments of two coastal lagoons of Tabasco, Mexico

Brazilian Journal of Animal and Environmental Research ◽

10.34188/bjaerv4n4-092 ◽

2021 ◽

Vol 4 (4) ◽

pp. 5993-6002

Author(s):

Cecilia Guadalupe Vázquez Jiménez ◽

Nancy Patricia Brito Manzano ◽

Perla Montserrat Vargas Falcón ◽

Martha Alicia Perera García ◽

José Bernat-Rodríguez

Keyword(s):

Heavy Metals ◽

Coastal Lagoons

constituyen un peligro para la biota acuática y el ser humano y un factor de deterioro de la calidad hídrica y ambiental. Los sedimentos ribereños, uno de los principales reservorios de estos elementos, actúan como fuentes secundarias de contaminación de los cuerpos de agua, por lo que resulta importante evaluar la concentración de metales como una herramienta que permita rastrear el origen de los contaminantes en el medio y predecir los impactos que pueden producir en los ecosistemas acuáticos. En el presente trabajo se analizó por cuadruplicado por espectrofotometría de absorción atómica la concentración de Cd, Cr, Cu, Pb y Zn en agua superficial y en sedimentos de dos lagunas costeras durante un año. Las muestras fueron colectadas mensualmente, a partir de tres estaciones de muestreo por cada una de las lagunas, El Carmen y Machona. Las concentraciones detectadas de Cd, Cr, Cu, Pb y Zn fueron mínimas y no sobrepasaron los LMP en la norma mexicana; en ninguna de las dos lagunas estudiadas.Se encontró que se presentan niveles significativamente superiores (p 0.05) de metales pesados en sedimento comparado con los observados en agua. El contenido de Cd y Cr en sedimentos no presentó diferencias significativas (p0.05) entre los bancos ostrícolas de ambas lagunas. La distribución de metales no fue homogénea, ni presentó un patrón geográfico marcadamente definido, pudiéndose encontrar altos niveles distribuidos a lo largo de los bancos estudiados.

Download Full-text

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100157000 ◽

1989 ◽

Vol 47 ◽

pp. 1004-1005

Author(s):

Randall W. Smith ◽

John Dash

Keyword(s):

Heavy Metals ◽

Surface Microlayer ◽

Surface Films ◽

Water Interface ◽

Physical Processes ◽

Infrared Spectroscopic Analysis ◽

Eds Analysis ◽

Air Water Interface ◽

Significant Area ◽

Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

Download Full-text