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Association of annual hormonal profile with gonad maturity of mahseer (Tor tambroides) in captivity.


Ismail, Fadhil Syukril and Siraj, Siti Shapor and Daud , Siti Khalijah and Harmin, Sharr Azni (2011) Association of annual hormonal profile with gonad maturity of mahseer (Tor tambroides) in captivity. General and Comparative Endocrinology, 170 (1). pp. 125-130. ISSN 0016-6480


Annual gonad hormonal profile of wild, matured mahseer (29 males and 23 female) averaging in weight between 0.95 ± 0.26 and 1.19 ± 0.23 kg for males and females, respectively, were investigated from November 2007 to November 2008 using enzyme-linked immunosorbent assay (ELISA) technique. Blood was collected from caudal vein, monthly and plasma separation by centrifugation was done to measure reproductive hormones: 17β-estradiol (E2), testosterone (T), and 11-keto-testosterone (11KT). Gonads were sampled for histology processing to observe their maturity. Highest T level in females and males was recorded at 0.22 ± 0.016 and 0.88 ± 0.014 ng/ml, respectively. The 11KT showed several peaks and the highest value was noted at 0.7 ± 0.018 ng/ml in November 2008. The female E2 initially was at 1.48 ± 0.16 ng/ml and significantly increased (P < 0.05) to 1.53 ± 0.39 ng/ml in November 2008. Ovaries were laden with oocytes in several stages in all the samples while testes gonad showed a high level of spermatids throughout the year. Changes in plasma level of the gonadal hormones were correlated with the ovarian and testes maturities. In conclusion, the study suggests that mahseer can be categorized as asynchronized and multiple spawner. The information gathered is important for appropriate breeding and conservation programs of the Malaysian mahseer.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
DOI Number: https://doi.org/10.1016/j.ygcen.2010.09.021
Publisher: Elsevier
Keywords: Mahseer; Gonadal hormone profile; 17β-Estradiol; 11-Keto-testosterone; Testosterone; Gonad maturity.
Depositing User: Nur Farahin Ramli
Date Deposited: 29 Nov 2013 08:15
Last Modified: 23 Sep 2015 00:57
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.ygcen.2010.09.021
URI: http://psasir.upm.edu.my/id/eprint/23652
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