Effects of maternal exposure to estrogen and PCB on different life stages of zebrafish Danio rerio

PCBs have been found to impair both reproduction and development in fish. We have investigated the effects of 3 PCB congeners and the estrogenic hormone 17 beta -estradiol on fecundity, early life-stage mortality, gross morphology and histology of zebrafish (Danio rerio). While none of the studied s...

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Veröffentlicht in:Ambio 1999-01, Vol.28 (1), p.100-106
Hauptverfasser: Olsson, P-E, Westerlund, L, Teh, S J, Billsson, K, Berg, AH, Tysklind, M, Nilsson, J, Eriksson, L-O, Hinton, DE
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container_end_page 106
container_issue 1
container_start_page 100
container_title Ambio
container_volume 28
creator Olsson, P-E
Westerlund, L
Teh, S J
Billsson, K
Berg, AH
Tysklind, M
Nilsson, J
Eriksson, L-O
Hinton, DE
description PCBs have been found to impair both reproduction and development in fish. We have investigated the effects of 3 PCB congeners and the estrogenic hormone 17 beta -estradiol on fecundity, early life-stage mortality, gross morphology and histology of zebrafish (Danio rerio). While none of the studied substances reduced fecundity, they increased embryo and larval mortality. The most severe effects on viability were observed following treatment with 17 beta -estradiol or the weakly estrogenic PCB-104. Following 17 beta -estradiol or PCB-104 exposure, mortality continued through the yolksac absorption phase. PCB-60, on the other hand, resulted in mortality between the 30% epiboly stage and 75% epiboly stage. At the same time as embryos started to die, embryo development and hatching were delayed. PCB-1 90 showed only moderate effects on early-life stage mortality. The fish were reared until sexual maturation whereafter they were subjected to gross morphological and histological analyses. While all studied substances resulted in effects on offspring, the observation that estrogenic substances are highly embryotoxic, raises concern that endocrine disrupting substances may severely reduce fish populations in polluted areas.
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subjects Danio rerio
Freshwater
title Effects of maternal exposure to estrogen and PCB on different life stages of zebrafish Danio rerio
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