Cytopathology of the brain and retina of embryonic surf smelt ( Hypomesus pretiosus) exposed to crude oil

In laboratory experiments, surf smelt ( Hypomesus pretiosus) embryos were exposed to 54 or 113 ppb of the seawater-accommodated fraction (SWAF) of Cook Inlet crude oil (CICO) for 3 hr per day, beginning 6 days after fertilization. Embryos 21 and 27 days old (just prior to hatching) exposed to CICO w...

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Bibliographic Details
Published in:Environmental research 1982-01, Vol.27 (1), p.164-178
Main Authors: Hawkes, Joyce W., Stehr, Carla M.
Format: Article
Language:English
Subjects:
Animals
Brain - embryology
Brain - ultrastructure
Fishes - embryology
Hypomesus pretiosus
Marine Biology
Petroleum - toxicity
Retina - embryology
Retina - ultrastructure
Water Pollutants - toxicity
Water Pollutants, Chemical - toxicity
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Summary:In laboratory experiments, surf smelt ( Hypomesus pretiosus) embryos were exposed to 54 or 113 ppb of the seawater-accommodated fraction (SWAF) of Cook Inlet crude oil (CICO) for 3 hr per day, beginning 6 days after fertilization. Embryos 21 and 27 days old (just prior to hatching) exposed to CICO were examined for morphological abnormalities. The only tissues that showed morphological changes in both the 21- and 27-day-old CICO-exposed smelt were the forebrain and the neuronal layer of the retina: both contained numerous necrotic neurons. The retinal receptor cells appeared normal in 21-day-old exposed smelt; in contrast, in 27-day-old treated embryos the ellipsoid and myoid regions of the receptor cell inner segments were severely damaged. Further impact from the SWAF of CICO on developing smelt was indicated by a lower hatching success: approximately 10% in the exposed groups as compared to 50% in the controls.
ISSN:0013-9351
1096-0953
DOI:10.1016/0013-9351(82)90067-6