Northwest Fisheries Science Center

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Document Type: Chapter or Section
Center: NWFSC
Document ID: 7781
Type of Book: Technical
Section or Chapter Title: Effect of crude oil on trout reproduction
Book Title: Fate and effects of petroleum hydrocarbons in marine ecosystems and organisms
Series Title: Proceedings of a symposium 10-12 November 1976, Seattle, Washington.
Author: Harold O. Hodgins, William D. Gronlund, James L. Mighell, Joyce W. Hawkes, P. A. Robisch
Editor: Douglas A. Wolfe (Ed.)
Publication Year: 1977
Publisher: Pergamon Press. New York
Pages: 143-150

Prudhoe Bay crude oil was incorporated into the diet (1 g oil/kg food) of adult rainbow trout during sexual maturation to assess the effects of long-term petroleum exposure on salmonid fish reproductive success.  Parallel control fish received identical rations, except without added petroleum.  When the fish reached maturity, six to seven months after initiation of petroleum exposure, a total of 31 test and 10 control crosses were made.  Mean survival through hatching was 86% and 90% for test and control eggs, respectively; the difference was non-significant (P = 0.10).  Test and control males were virtually identical in fertility.  Mean survival from hatching to swim-up fry stage of development was 76% for test and 91% for control fish; again the difference was not significant (P = 0.10).  In addition, no gross morphological or histological abnormalities were observed in offspring of petroleum-fed fish.  The results of these studies were, therefore, that there was no significant impairment of reproductive success detected from this type of dietary exposure to petroleum.