medigraphic.com

1998, Number 1

<< Back Next >>

Vet Mex 1998; 29 (1)

Mercury distribution and concentration in tissues of Rhizoprionodon terraenovae shark from the Gulf of Mexico

Núñez NG, Bautista OJ, Rosiles MR

Language: English/Spanish
References: 25
Page: 15-21
PDF size: 534.66 Kb.


ABSTRACT

In this study mean mercury concentrations were measured in gills (0.66 mg/kg), brain (0.45 mg/kg), liver (0.16 mg/kg), pancreas (0.51 mg/kg), muscle (0.63 mg/kg) and kidney (0.42 mg/kg) dry weight bases from 44 sharks (Rhizoprionodon tewaenovae) captured at the seashore from the Gulf of Mexico (Veracruz and Tabasco states). Mercury concentration was measured using both the atomic absorption spectrophotometric and bohidride generation methodologies. A comparison was made between mean mercury concentration in males (0.57 mg/kg) and females (0.75 mg/kg). As well as gills 0.47, muscle 0.64, brain 0.51, kidney -0.81, liver -0.61 and pancreas 0.91 concentration, between length and age of individuals. In order to assess the risk due to consumption of meat from these sharks, the maximum acceptable value of mercury as established by the Joint Committee FAO/WHO was taken into account and compared to the amount of Hg ingested when shark meat was consumed. With this analysis, it was established that 280 g of shark meat contaminated with this mean concentration of mercury are needed to be consumed every day for some period in order to suffer from harmful mercury exposure.


REFERENCES

  1. Caputi N, Edmons JS, Heals DI. Mercury contents of sharks from south-western Australian waters. Mar Pollu Bull 1979; 10:337-340.

  2. Núñez NG. Concentración de As, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se y Zn en dos especies de tiburones del Golfo de México (Rhizoprionodon terraenovae y Carcharhinus limbatus) con importancia comercial (tesis de licenciatura). México (DF) México: Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México. UNAM. 1996.

  3. Shultz CD, Crear D. The distribution of total and organic mercury in seven tissues of the Pacific blue marlin, Makaira nigricans. Pacif Sci 1976;300: 101-107.

  4. Heat GA. Water pollution and fish physiology. Boston (MA):CRC Press, 1987.

  5. Jacob PG, Zarba MA, Salem, AD. Results of toxicity test with marine organisms of Kuwait coast. Indian J Fish 1980;27: 111-122.

  6. Sinderman CJ. Principal diseases of marine fish and shellfish. San Diego (CA): Academic Press, 1989.

  7. Walker, TI. Effects of the species, sex, length, and locality on the mercury content of school shark Galeorhinus australis (Macleay) and gummy shark Mustelus antarticus (Guenther) from south-eastern Australian waters. Austr J Mar Freshwater Res 1976;270:603-616.

  8. Applegate SP, Sotelo FM, Espinoza LA. An overview of Mexican sharks fisheries with suggestion for shark conservation in Mexico. Elasmobranchs as living resources: advances in the biology, ecology, systematics, and the status of the fisheries. NOAA Tech Rep 1991;NMFS-91:31-37.

  9. Castillo JL. Shark fisheries and research in Mexico. CHONDROS 1990;2: 1-2.

  10. Castro JI. The sharks of North American waters. College Station (TX): Texas A & M University Press, 1993.

  11. Hyde W, Kesey J, Ross PF, Stahr HM. Analytical toxicology methods manual. Ames (IA): Iowa State University Press, 1977.

  12. Perkin-Elmer Co. Analytical methods for atomic absorption spectrophotometry. Northwalk (CO): The Perkin-Elmer Co., 1982.

  13. Rosner B. Fundamentals of biostatistics. Belmont (CA): Duxbury Press, 1990.

  14. Siegel S. Estadística no paramétrica. México (DF):Trillas, 1990.

  15. Spiegel, H. Estadística. México (DF): McGraw-Hill, 1970.

  16. Branstetter S. Age and grow validation of new born shark held in laboratory aquaria, with comments on the life history of the Atlantic sharpnose shark, Rhizoprionodon terraenovae. COPEIA 1979;20:291-300.

  17. Marin OR. Clave para la determinación de los tiburones del Golfo de México. Veracruz, Veracruz, México: Universidad Veracruzana, 1992.

  18. Organización Mundial de la Salud. Criterios de salud ambiental 1 y 3. Mercurio y plomo. Publicación Científica No. 362 Y 388. Washington (DC): OMS 1976:148-169.

  19. Taguchi M, Yasuda K, Toda S, Shimizu M. Study of metal contents of elasmobranch fishes: Part I-metal concentra tion in the muscle tissues of a dogfish. Squalus mitsukurii. Mar Environ Res 1979;20:239-249.

  20. Lyle JM. Mercury concentrations in four carcharhinid and three hammerhead sharks from coastal waters of the northern territory. Austr J Mar Freshwater Res 1984; 350: 441-451.

  21. Barber RJ, Whaling PJ. Mercury in the marlin and sailfish. Mar Pollu Bull 1983;4:395-396.

  22. Bonswick GA,Vas P, Fielden PR, Gordon J DM. Metallothionein- like proteins in the livers of squaloid and carcharhinid sharks. Mar Pollu Bull 1990;21:567-570.

  23. Vas P, Gordon JM, Fielden PR, Overnell J. The trace metal ecology of the icthyofauna in the Rockall Trough northeastern Atlantic. Mar Pollu Bull 1993;260:607-612.

  24. Desache R. Toxicología y seguridad de los alimentos. Madrid, España: Omega, 1990.

  25. Greig AR, Wenzloff DR. Trace metals in finfish from the New York Bight and Loney Island Sand. Mar Pollu Bull 1977;8:200-204.




2020     |     www.medigraphic.com