ISSN:1064-1262    

DOI:10.1080/10641269609388588

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

In the 6 years following theExxon Valdezoil spill in March 1989, a number of field and laboratory studies have been conducted to assess spill‐related effects on all critical life stages of the Prince William Sound pink salmon population. In many cases, the results of these studies are in close agreement, but in others they are not. The conclusions arrived at by various investigators must be resolved because both an understanding of oil‐spill effects in the marine environment and the response of the pink salmon population to such spills are critical to comprehending and responding to spills in the future.

ISSN:1064-1262    

DOI:10.1080/10641269609388589

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

This report explores and interprets statistical associations ofPleuronectes americanusegg contaminants with reproductive success. Winter flounder, a candidate for aquaculture, is at historically low abundance levels and has high prevalences of liver tumors. Pesticide and PCB concentrations of flounder eggs generally exceed those of more commonly analyzed marine samples, some being higher, others lower than egg concentrations linked to diminished reproduction of other resource species. Associations of individual contaminants of all chemical groups were mostly consistent with their uptake, metabolism, cumulation, toxicity, and egg concentration. Pesticides (20% of the mean total organic contaminant load of 3.2 μg/g dry weight) most strongly and significantly associated with increased mortality and defect of flounder embryos, followed by PAHs (10% of the organic contaminant load) and then metals. Total PCBs (70% of the egg organic contaminant load) had the weakest association with increased embryo mortality and defect, mostly accounted for by large concentrations of congeners with high potential toxicity. Other PCBs of low and high chlorine number and little or no known toxicity may act as toxin antagonists. Eggs of smaller flounder have increased concentrations of diverse contaminants. Eggs of older winter flounder have higher concentrations of cumulative compounds associated with detrimental reproductive effects.

ISSN:1064-1262    

DOI:10.1080/10641269609388590

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor