Distribution of organochlorine contaminants in double-crested cormorant eggs and sibling embryos

Double-crested cormorant (Phalacrocorax auritus) fresh eggs and sibling embryos at pipping were collected from a polychlorinated biphenyl (PCB)-contaminated colony in Green Bay, Wisconsin, USA. Egg contents were analyzed for organochlorine (OC) contaminants, including 15 arylhydrocarbon-active PCB c...

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Bibliographic Details
Published in:Environmental toxicology and chemistry 1997-08, Vol.16 (8), p.1646-1649
Main Authors: Custer, T.W. (National Biological Service, LaCrosse, WI.), Custer, C.M, Stromborg, K.L
Format: Article
Language:English
Subjects:
ANIMAL SALVAJE
ANIMAL SAUVAGE
Animal, plant and microbial ecology
Applied ecology
Aves
Biological and medical sciences
BIRDS
COMPOSE ORGANOCHLORE
COMPUESTO ORGANICO DEL CLORO
CONTAMINANTES
Contaminants
DISTRIBUCION ESPACIAL
DISTRIBUTION SPATIALE
Double-crested cormorant
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on vertebrates
Freshwater
Fundamental and applied biological sciences. Psychology
OISEAU
ORGANOCHLORINE COMPOUNDS
Organochlorines
OVA
OVULE
OVULO
PAJAROS
PCB congeners
PELECANIFORMES
PHALACROCORAX
Phalacrocorax auritus
POLLUANT
POLLUTANTS
Sample egg method
SPATIAL DISTRIBUTION
TISSUE DISTRIBUTION
WILD ANIMALS
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Summary:Double-crested cormorant (Phalacrocorax auritus) fresh eggs and sibling embryos at pipping were collected from a polychlorinated biphenyl (PCB)-contaminated colony in Green Bay, Wisconsin, USA. Egg contents were analyzed for organochlorine (OC) contaminants, including 15 arylhydrocarbon-active PCB congeners. In order to determine the significance of tissue removal on the subsequent estimate of contaminant burden, embryos were decapitated and the heads, yolk sac, liver, fecal sac (allantois), and carcass remainder were analyzed separately. The distribution of contaminant concentration in the embryos was yolk sac liver carcass head fecal sac. The distribution of contaminant mass in the embryos was yolk sac carcass liver head fecal sac. For example, mass of total PCBs (TPCB) was yolk sac = 58%, carcass = 31%, liver 5%, head 3%, and fecal sac 1%. Eighteen additional OCs, including 13 PCB congeners, had distribution patterns similar to that of TPCB concentration and mass. Excluding the head of the embryo from the chemical analysis overestimated TPCB concentrations by 15% (16 vs 14 micrograms). In contrast, excluding the liver from the chemical analysis underestimated TPCB concentration by only 4% (13.5 vs 14 micrograms/g). Mean concentrations of OCs were not significantly different between fresh eggs and sibling embryos
ISSN:0730-7268
1552-8618
DOI:10.1002/etc.5620160812