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Resumen del producto
Murillo-Cisneros, D.A., T.M., O'Hara, J., Margaret Castellini, A., Sánchez-González, F.R., Elorriaga-Verplancken, E., Marín-Enríquez, A.J., Marmolejo Rodríguez & F., Galván-Magaña
(2018).
Mercury concentrations in three ray species from the Pacific coast of Baja California Sur, Mexico: Variations by tissue type, sex and length.
Marine Pollution Bulletin.
126(2018): 77-85.
DOI: 10.1016/j.marpolbul.2017.10.060.
Mercury concentrations in three ray species from the Pacific coast of Baja California Sur, Mexico: Variations by tissue type, sex and length
Daniela A. Murillo-Cisneros, Todd M. O'Hara, J. Margaret Castellini, Alberto Sánchez-González 1, Fernando Ricardo Elorriaga-Verplancken 1, Emigdio Marín-Enríquez, Ana Judith Marmolejo Rodríguez 1 y Felipe Galván-Magaña 1
1 Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas
Total mercury concentrations ([THg]) were determined in muscle and liver of the bat ray (Myliobatis californica),shovelnose guitarfish (Pseudobatos productus) and banded guitarfish (Zapteryx exasperata). Generalized linearmodels (GLM) were used to determine the effects of size and sex in [THg] and showed that both are determinantsof [THg] in these species. The [THg] in both tissues significantly increased with length especially in sexuallymature organisms with a steeper slope for mature male than mature female. This may relate to elasmobranchssexual dimorphism driven variation in growth rates. Median muscle [THg] was significantly greater than liver ineach ray species but there were some individuals with higher liver [THg] than muscle. There were individualswith muscle [THg] higher than the advisory thresholds of 0.2 and 0.5 mg kg-1 ww (2.4 and 11% of the bat ray;2.1 and 10% of the shovelnose guitarfish; 12.6 and 45% of the banded guitarfish, respectively).
Palabras clave: Mercury; rays; muscle; Liver; Safety limit
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