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Aquaculture and Fisheries Commons

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1994

Retrospective Theses and Dissertations

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A Study Of Thyroid Hormones In Eggs And Larvae Of Walleye, Stizostedion Vitreum, And Rainbow Trout, Oncorhynchus Mykiss , Jane Pires Hey Jan 1994

A Study Of Thyroid Hormones In Eggs And Larvae Of Walleye, Stizostedion Vitreum, And Rainbow Trout, Oncorhynchus Mykiss , Jane Pires Hey

Retrospective Theses and Dissertations

Eggs from many species of marine teleosts contain the thyroid hormones (THs), thyroxine (T[subscript]4) and 3,5,3[superscript]' triiodothyronine (T[subscript]3). Elevating striped bass egg T[subscript]3 concentration by maternal injection increases larval growth and survival; T[subscript]3 may act during the critical period when larvae begin feeding. We investigated egg T[subscript]3 levels in walleye, whose life history is similar to striped bass, and compared walleye egg TH developmental changes with rainbow trout, a species with larger eggs, slower development and no critical period. Samples of eggs and larvae were frozen for ...