Skip Navigation

American Zoologist 1997 37(6):470-481; doi:10.1093/icb/37.6.470
© 1997 by The Society for Integrative and Comparative Biology
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Request Permissions
Google Scholar
Right arrow Articles by KIM, B. G.
Right arrow Articles by BROWN, C. L.
Right arrow Search for Related Content
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Interaction of Cortisoi and Thyroid Hormone in the Larval Development of Pacific Threadfin1

BONG G. KIM and CHRISTOPHER L. BROWN2
Hawaii Institute of Marine Biology, School of Ocean and Earth Science and Technology, University of Hawaii Box 1346 Coconut Island, Kaneohe, Hawaii 96744 USA

Correspondence: 2 E-mail: cbrown{at}iniki.soest.hawaii.edu

We have conducted three hatchery-scale experiments designed to examine the actions and interactions of cortisoi and thyroid hormones in the development of a larval marine fish. Survival among controls varied significantly between the 3 replicate experiments. The threadfin (Polydactylus sexfilis) consistently responds to 1 hr posthatch immersion in a combination of triiodothyronine and cortisoi (T3 + F) with accelerated gut development and increased survival compared with untreated controls (C). Survival among larvae treated with T3 or F separately was significantly improved over controls in one of the three experiments. The frequency of spinal deformities was reduced by cortisoi treatment, alone or in combination with T3. Growth did not vary with treatment, except that variance in larval length was reduced in (T3 + F) vs. C in all 3 experiments. A hormoneinduced increase in uniformity could lead to reduced cannibalism, which is a problem in the culture of threadnns. These results suggest interactive hormonal regulation of developmental processes, working within the context of other biological variables


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.