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Withdrawal of exogenous 17-alpha methyltestosterone causes reversal of sex-inversed male grouper Epinephelus suillus (Valenciennes)

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日付
1992
著者
Tan-Fermin, Josefa D.
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38
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抄録
The protogynous hermaphrodite groupers Epinephelus suillus were given bi-weekly injections of 17 alpha-methyltestosterone (MT) intramuscularly for three to six months. Spermatogenesis occurred after three months of MT treatment while spermiation was observed after five to six months of MT treatment in larger fish. Neither cannulated tissue nor milt was obtained when the remaining fish were sampled four months after withdrawal of exogenous MT. However, vitellogenic eggs (size range = 0.34 to 0.56 mm) were cannulated eight months after termination of MT treatment. Presence of eggs in fish which previously had expressible or cannulated milt indicates that the sex-inversed male E. suillus reverted back to the female condition upon withdrawal of exogenous MT. This information is useful in the line production of functional males which is the limiting factor in induced breeding of groupers.
URI
http://hdl.handle.net/10862/1400
Suggested Citation
Tan-Fermin, J. D. (1992). Withdrawal of exogenous 17-alpha methyltestosterone causes reversal of sex-inversed male grouper Epinephelus suillus (Valenciennes). The Philippine Scientist, 29, 33-39.
主題
Biological fertilization; fish culture ASFA; hermaphroditism ASFA; marine fish ASFA; sex hormones ASFA; sex reversal ASFA; spermatogenesis ASFA; Serranidae; Epinephelus suillus
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  • AQD Journal Articles [1158]

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    Induction of sex inversion in juvenile grouper, Epinephelus suillus, (Valenciennes) by injections of 17α-Methyltestosterone 

    Tan-Fermin, Josefa D.; Garcia, LM; Castillo Jr., Antonio R. (The Ichthyological Society of Japan, 1994)
    Four groups of two-year old juvenile groupers (Epinephelus suillus), each with 8-9 individuals of mean body weight (BW) 1.2 kg, were treated with 17α-methyltestosterone (MT). MT was injected intramuscularly within the range ...
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    Possible application of mibolerone for induced sex inversion of grouper Epinephelus coioides 

    Quinitio, Gerald F.; Tan-Fermin, Josefa D.; Nagai, Akimasa (Japanese Society of Fisheries Science, 2001)
    Thirty immature juvenile grouper Epinephelus coioides (19-168 g bodyweight, BW) were randomly stocked in four units 6 t tanks to determine if mibolerone can be used to induce sex inversion in groupers. After acclimatization ...
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    Mohamed, Asaad H.; Traifalgar, Rex Ferdinand M.; Serrano Jr., Augusto E.; Peralta, Jose P.; Pedroso, Fiona L. (Academic Journals, New York, 2012)
    Effects of a steroid hormone Dehydroepiandrosterone (DHEA) on sex differentiation of hybrid red Tilapia Oreochromis niloticus x O. mossambicus larvae were investigated. Three day-old tilapia larvae were fed diets supplemented ...

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