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Reproductive biology and endocrinology of greenback flounder Rhombosolea tapirina (Gunther 1862)


Poortenaar, CW and Pankhurst, NW, Reproductive biology and endocrinology of greenback flounder Rhombosolea tapirina (Gunther 1862), Marine and Freshwater Research, 50, (1) pp. 35-42. ISSN 1323-1650 (1999) [Refereed Article]

DOI: doi:10.1071/MF97103


The relationship between patterns of gonadal development and endocrine changes during reproductive development was examined in the greenback flounder (Rhombosolea tapirina). Oocyte size-frequency distributions showed that female greenback flounder have group synchronous oocyte development, and that there are multiple ovulations. Plasma and ovarian concentrations of testosterone (T) and 17β-oestradiol (E2) were elevated in association with vitellogenesis. Plasma concentrations of 17,20β-dihydroxy-4-pregnen-3-one (17,20βP) were significantly elevated in ovulated females, whereas ovarian concentrations of 17,20βP were elevated in association with final oocyte maturation (FOM) and ovulation. Plasma concentrations of 17,20βP-sulfate but not 17,20βP-glucuronide were elevated in association with FOM and ovulation. Changes in macroscopic testis stage were not accompanied by significant changes in proportions of gamete types in the testis. Plasma concentrations of T were elevated in spermatogenic and partially spermiated males. No significant changes in plasma 11-ketotestosterone (11KT), 17,20βP, 17,20βP-sulfate and 17,20βP-glucuronide were detected with change in testis stage.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Comparative physiology
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Poortenaar, CW (Dr Carolyn Wendy Poortenaar)
UTAS Author:Pankhurst, NW (Professor Ned Pankhurst)
ID Code:16566
Year Published:1999
Web of Science® Times Cited:29
Deposited By:TAFI - Aquaculture
Deposited On:1999-08-01
Last Modified:2011-11-18

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