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Comparison of Nitrofen Uptake via Water and Food and its Distribution in Tissue of Common Carp, Cyprinus carpio L Texte intégral
2011
Inoue, Yoshiyuki | Hashizume, Naoki | Kikushima, Erina | Otsuka, Masanori
Carp (Cyprinus carpio L.) were exposed to nitrofen (NIP) by different routes (via water or food) to compare bioaccumulation parameters and tissue distribution. The bioconcentration factor of NIP was 5,100, and the lipid-corrected biomagnification factor was 0.137. Growth-corrected elimination half lives were 2.1–3.0 days via aqueous exposure and 2.7–2.9 days via dietary exposure. From either uptake route, the tissue distribution of NIP was highest in the head, followed by muscle, viscera, dermis, digestive tract and hepatopancreas, which was highly correlated with the tissue lipid content. We conclude that the uptake route has no influence on tissue distribution of NIP and that the accumulation potential in tissues depends on the lipid content.
Afficher plus [+] Moins [-]Vitellogenin as biomarker for estrogenicity in flounder Platichthys flesus in the field and exposed to 17α-ethinylestradiol via food and water in the laboratory Texte intégral
2013
Madsen, Louise Leonharder | Korsgaard, Bodil | Pedersen, Knud Ladegaard | Bjerregaard, Lisette Bachmann | Aagaard, Thomas | Bjerregaard, Poul
The ability of 17α-ethinylestradiol (EE2) to elevate vitellogenin levels were investigated in male flounder Platichthys flesus and vitellogenin concentrations in flounders from the Danish coastal environment were determined. Male flounders were exposed to 17α-ethinylestradiol (EE2) via food or water. Average vitellogenin concentrations in the control fish ranged between 25 and 100 ng mL−1. Exposure to 5.1, 8.1 and 16.8 ng EE2 L−1 in water and 500 and 5000 ng EE2 kg−1 body weight (bw) every second day in the food increased the plasma vitellogenin concentration in a concentration and time dependent manner, whereas exposure to 2.7 ng EE2 L−1 in water for 21 d and 5 and 50 ng EE2 kg−1 bw for 12 days in the food did not. EE2 could be detected in liver and testes (but not in muscle) after exposure to 8.1 and 16.8 ng EE2 L−1 in the water and 5000 ng EE2 kg−1 bw in the food; the highest concentration was 6 ng g−1 wet weight in liver. The majority of the male flounders collected from nine coastal Danish sites from 1999 to 2004 had vitellogenin concentrations below 100 ng mL−1, and only at two sites moderate estrogenic inputs were indicated.
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