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Thyroxine injection of female rabbitfish (Siganus guttatus) broodstock: changes in thyroid hormone levels in plasma, eggs, and yolk-sac larvae, and its effect on larval growth and survival

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Date
1993
Author
Ayson, Felix G.
Lam, Tom J.
Page views
1,650
Subject
developmental stages ASFA
fish larvae ASFA
growth ASFA
hormones ASFA
larval stage ASFA
survival ASFA
thyroid gland ASFA
thyroxine AGROVOC
Siganus guttatus AGROVOC
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Abstract
The thyroid hormone levels in female rabbitfish, Siganus guttatus, plasma, eggs, and yolk-sac larvae were measured before and after thyroxine (T4) injection in female spawners at doses of 1, 10, and 100 μg T4/g body weight (BW) fish. T4 and triiodothyronine (T3) levels in maternal plasma, eggs, and yolk-sac larvae were elevated following T4 administration. Apparently, there is conversion of T4 into T3 in the broodfish which suggests the presence of the enzyme, 5′-monodeiodinase, in rabbitfish. T4 and T3 in maternal circulation were easily transferred into the oocytes and subsequently into the larvae. Larvae from spawners treated with 10 and 100 μg T4/g BW tended to be longer and showed sornewhat better survival compared to the control and those injected with 1 μg T4/g BW 7 days after hatching. These findings suggest that thyroid hormones may play an important role during early larval development of rabbitfish.
URI
http://hdl.handle.net/10862/1404
Suggested Citation
Ayson, F. G., & Lam, T. J. (1993). Thyroxine injection of female rabbitfish (Siganus guttatus) broodstock: changes in thyroid hormone levels in plasma, eggs, and yolk-sac larvae, and its effect on larval growth and survival. Aquaculture, 109(1), 83-93. https://doi.org/10.1016/0044-8486(93)90488-K 
DOI
10.1016/0044-8486(93)90488-K
Type
Article
ISSN
0044-8486
Collections
  • Journal Articles [1162]


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