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Reproductive success in rainbow trout following parental transfer of 2,3,4,7,8‐pentachlorodibenzofuran
Author(s) -
Delorme Peter D.,
Brown Scott B.,
Muir Derek C.G.,
Evans Robert E.,
Lockhart W. Lyle,
Ward Frederick J.
Publication year - 1998
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620170522
Subject(s) - fecundity , rainbow trout , biology , human fertilization , zoology , reproduction , sperm , endocrinology , fish <actinopterygii> , fishery , anatomy , ecology , population , botany , demography , sociology
Broods stock rainbow trout were intraperitoneally injected with corn oil containing a nominal dose of 0 or 3 μg [ 14 C]2,3,4,7,8‐pentachlorodibenzofuran (P 5 CDF)/kg (8.8 nmol/kg). The fish were held on a light cycle designed to induce spawning 10 months later. Eggs were expressed from individual ripe females and divided into two lots. One lot from each control female (F c ) and treated female (F t ) was fertilized by a treated male (M t ) and the other by a control male (M c ). Radioactivity levels were determined in parental muscle, gonads, eggs, embryos, and fry. Mean concentrations in dorsal muscle tissue were 604 pg/g (1.77 pmol/g) in treated females (F t ) and 868 pg/g (2.54 pmol/g) in treated males. No differences were found between treated and control fish, in fecundity, or in fertilization rates between any of the crosses. Concentrations of P 5 CDF in eggs at the time of spawning ranged from 68 to 443 pg/g wet weight with a mean concentration ( N = 7) of 232 pg/g (0.68 pmol/g). Average prehatch mortalities, posthatch survival, or survival through swim‐up, and the first 21 d of feeding were not different between the cross groups. Within the F t × M t cross group, fertilization mortality, prehatch mortality, and total mortality were significantly correlated with egg concentrations of P 5 CDF. Marginal but significant increases in the incidence of blue‐sac‐like disease occurred in the groups from treated females.