Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/106884
Title: Retardation of ovarian growth and depression of serum steroid levels in the tilapia, Oreochromis mossambicus, by cortisol implantation
Authors: FOO TET WEI,JOHN 
Lam, T.J. 
Issue Date: 15-Aug-1993
Citation: FOO TET WEI,JOHN, Lam, T.J. (1993-08-15). Retardation of ovarian growth and depression of serum steroid levels in the tilapia, Oreochromis mossambicus, by cortisol implantation. Aquaculture 115 (1-2) : 133-143. ScholarBank@NUS Repository.
Abstract: Female Oreochromis mossambicus were implanted with cortisol suspended in cocoa-butter for the evaluation of the chronic effects of cortisol on reproduction. Implant doses of 1.5 and 3.0 mg/g body weight, mimicking the effects of long-term chronic stress, suppressed various reproductive parameters over the 18-day treatment period. Most fish treated with cortisol showed reductions in body weight. Oocyte size and gonadosomatic index of treated fish became significantly lower than the control after 9 and 12 days of treatment, respectively. The retardation of oocyte growth was accompanied by depression of serum testosterone and oestradiol-17β levels. © 1993.
Source Title: Aquaculture
URI: http://scholarbank.nus.edu.sg/handle/10635/106884
ISSN: 00448486
Appears in Collections:Staff Publications

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