Mercury maternal transfer in two placental sharks and a yolk-sac ray from Baja California Sur, Mexico.

Autor: Baró-Camarasa I; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur C.P. 23096, Mexico., Marmolejo-Rodríguez AJ; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur C.P. 23096, Mexico., O'Hara TM; Bilingual Laboratory of Toxicology, Dept. of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, C.P. 4461, TX, USA; Department of Veterinary Medicine, University of Alaska Fairbanks, C.P. 99775, AK, USA., Castellini JM; Department of Veterinary Medicine, University of Alaska Fairbanks, C.P. 99775, AK, USA., Murillo-Cisneros DA; Centro de Investigaciones Biológicas del Noroeste, S.C. Planeación Ambiental y Conservación, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur C.P. 23096, Mexico., Martínez-Rincón RO; CONACYT-Centro de Investigaciones Biológicas del Noroeste, S.C. La Paz, Baja California Sur C.P. 23096, Mexico., Elorriaga-Verplancken FR; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur C.P. 23096, Mexico., Galván-Magaña F; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur C.P. 23096, Mexico. Electronic address: galvan.felipe@gmail.com.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2022 Jun; Vol. 179, pp. 113672. Date of Electronic Publication: 2022 May 02.
DOI: 10.1016/j.marpolbul.2022.113672
Abstrakt: Total mercury (THg) concentrations were measured in muscle and liver of two placental viviparous sharks, the Pacific sharpnose shark (Rhizoprionodon longurio) and the brown smooth-hound (Mustelus henlei); as well as in the muscle, liver, and yolk of the yolk-sac viviparous speckled guitarfish (Pseudobatos glaucostigmus) in Baja California Sur. The aim was to determine which factors could be involved in maternal transfer and resultant maternal and embryonic THg concentration. Higher THg concentrations were found in pregnant females compared to embryos paired tissues. THg concentrations of embryo tissues decreased with total length (T L ), except for the muscle of the Pacific sharpnose shark. THg concentrations of embryo muscle was positively related to THg concentration in the muscle of pregnant females. Embryos T L , muscle THg concentration of pregnant females, percentage of THg concentration in embryos, along with the reproductive strategy are relevant factors required to improve our understanding of THg concentration in embryo tissues.
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Databáze: MEDLINE
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