Enhanced survival in striped bass fingerlings after maternal triiodothyronine treatment |
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| Authors: | Christopher L Brown Serge I Doroshov Michael D Cochran Howard A Bern |
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| Institution: | (1) Department of Zoology and Cancer Research Laboratory, University of California, Berkeley, CA 94720, USA;(2) Department of Animal Sciences, University of California, Davis, CA 95616, USA;(3) California Department of Fish & Game, Central Valley Hatchery, 9300 Elk Grove-Florin Road, Elk Grove, CA 95624, USA;(4) Department of Zoology, University of California, Berkeley, CA 94720, USA |
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| Abstract: | Elevation of the triiodothyronine (T3) content of striped bass (Morone saxatilis) eggs by maternal T3 injection confirms the uptake of T3 by oocytes. The resulting offspring were influenced favorably by the T3, as seen in quantitative indices of development. As reported previously, larvae from T3-supplemented eggs raised under laboratory conditions exhibited increased body area, length, dry weight, and rates of swimbladder
inflation and survival, compared to controls. Also, the T3 content of unfertilized oocytes correlated positively and highly significantly with survival to two weeks of age within individual
cohorts (Brownet al., 1988). In the present study, the survival of experimental and control striped bass was monitored through the fingerling
stage, under hatchery production conditions. The rate of recovery of maternally T3-treated cohorts from pond-culture was approximately fourfold that of controls. The striking effects of T3 enrichment of eggs on offspring indicate the potential contribution of maternal hormones in striped bass development, and
suggest possible applications in aquaculture. |
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| Keywords: | maternal hormone thyroid hormone hormone supplement triiodothyronine survival striped bass |
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