Data/hora: 05/06/2024 10:45:05

Provedor de dados: | 37
País: | Colombia
Título: | Mercury Levels in Eggs, Embryos, and Neonates of Trachemys callirostris (Testudines, Emydidae)
Autores: | RENDÓN-VALENCIA,BEATRIZ; ZAPATA,LINA M; C. BOCK,BRIAN; PÁEZ,VIVIAN P.; PALACIO,JAIME A.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Bioaccumulation; Colombian slider; Heavy metals; Mercury; Yolk.
Resumo: | We quantified total mercury concentrations in eggshells, egg yolks, and embryos from 16 nests of the Colombian Slider (Trachemys callirostris). Nests were collected in different stages of development, but estimated time of incubation in natural substrates was not correlated with mercury levels in the eggs, suggesting that mercury was not absorbed from the substrate, but more likely passed on to the embryos during folliculogenesis by the reproductive females who had bioaccumulated the mercury from environmental sources. Mean mercury concentrations were higher in embryos than in eggshells or egg yolks, indicating that embryos also bioaccumulate mercury present in other egg tissues. Intra-clutch variation in egg yolk mercury concentrations was relatively high. Egg yolk mercury concentrations were not associated with any of the fitness proxies we quantified for the nests (hatching success rates, initial neonate sizes and first-month juvenile growth rates). After five months of captive rearing in a mercury-free laboratory environment, 86 % of the juveniles had eliminated the mercury from their tissues.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2014000300016
Editor: | Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Biología
Relação: | 10.15446/abc.v19n3.42382
Formato: | text/html
Fonte: | Acta Biológica Colombiana  v.19 n.3 2014
Fonte: | info:eu-repo/semantics/openAccess