ສະແດງບັນທຶກທີ່ງ່າຍດາຍສໍາລັບລາຍການ
Effect of season on oocyte development and serum steroid hormones in LHRHa and pimozide-injected catfish Clarias macrocephalus (Günther)
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dc.contributor.author | Tan-Fermin, Josefa D. | |
dc.contributor.author | Marte, Clarissa L. | |
dc.contributor.author | Ueda, Hiroshi | |
dc.contributor.author | Adachi, Shinji | |
dc.contributor.author | Yamauchi, Kohei | |
dc.date.accessioned | 2012-07-23T06:50:37Z | |
dc.date.available | 2012-07-23T06:50:37Z | |
dc.date.issued | 1999 | |
dc.identifier.citation | Tan-Fermin, J. D., Marte, C. L., Ueda, H., Adachi, S., & Yamauchi, K. (1999). Effect of season on oocyte development and serum steroid hormones in LHRHa and pimozide-injected catfish Clarias macrocephalus (Günther). Fisheries Science, 65(6), 865–870. | en |
dc.identifier.issn | 0919-9268 | |
dc.identifier.uri | http://hdl.handle.net/10862/1002 | |
dc.description.abstract | Oocyte and blood samples were taken from gravid female catfish Clarias macrocephalus at 4-h intervals to monitor the stage of oocyte development and serum steroid hormone profiles after injection of luteinizing hormone-releasing hormone analogue (LHRHa) and pimozide (PIM) during the off-season (February) and the peak of the natural breeding period (August). Results showed that the onset of final oocyte maturation (12h) and ovulation (16h), and levels of serum estradiol-17β (E2) did not vary with season in LHRHa+PIM-injected fish. In February, ovulated eggs were stripped from three and two hormone-treated fish at 16h and 20h post-injection, respectively. In August, ovulation was observed in all hormone-treated females (n=5) at 16h post-injection but stripping of the eggs was possible only 4h thereafter. Serum E2 levels were significantly different only with varying time post-injection; a marked increase occurred at 12h, but the elevation was higher in fish induced to ovulate during the peak (16.8ng/ml) than off-season (7.7ng/ml). Hormone-treated fish showed higher serum testosterone (T) levels during the peak season (17-23ng/ml) than those injected during the off-season (10-20ng/ml) at 4-12h post-injection. Serum 17α, 20β-dihydroxy-4-pregnene-3-one (DHP) levels of hormone-treated fish during the off-season were only about half the level (0.29 and 0.52 ng/ml) of those treated with the same hormones during the peak season (0.54 and 0.9ng/ml) at 8 and 12h postinjection, respectively. Development of oocytes and serum steroid hormone profiles after LHRHa+PIM-induced ovulation provide basic understanding of the processes that mediate final oocyte maturation and ovulation in captive C. macrocephalus. | en |
dc.language.iso | en | en |
dc.publisher | Japanese Society of Fisheries Science | en |
dc.relation.uri | https://www.jstage.jst.go.jp/article/fishsci1994/65/6/65_6_865/_pdf | |
dc.subject | Clarias macrocephalus | en |
dc.subject | steroid hormones | en |
dc.subject | freshwater catfish | en |
dc.subject | LH | en |
dc.title | Effect of season on oocyte development and serum steroid hormones in LHRHa and pimozide-injected catfish Clarias macrocephalus (Günther) | en |
dc.type | Article | en |
dc.citation.volume | 65 | |
dc.citation.issue | 6 | |
dc.citation.spage | 865 | |
dc.citation.epage | 870 | |
dc.citation.journalTitle | Fisheries Science | en |
dc.subject.asfa | fish culture | en |
dc.subject.asfa | seasons | en |
dc.subject.asfa | freshwater aquaculture | en |
dc.subject.asfa | induced ovulation | en |
dc.subject.asfa | oocytes | en |
dc.subject.asfa | oogenesis | en |
dc.subject.asfa | ovulation | en |
dc.subject.asfa | sex hormones | en |
dc.subject.asfa | spawning seasons | en |
dc.subject.asfa | steroids | en |
ໄຟລ໌ສໍາລັບລາຍການນີ້
ໄຟລ໌ | ຂະໜາດ | ຮູບແບບ | ຊອກຫາ |
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AQD Journal Articles [1222]
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