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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.12
- 수록면
- 437 - 445 (9page)
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초록· 키워드
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Roughscale sole (Clidoderma asperrimum) is only wild caught because basic reproductive research on this species is lacking and gamete production in an artificial setting has not been successful. Exogenous hormone treatment has been used to induce gonadal maturation and final spermiation in wild-caught individuals. In this study, the effects of an exogenous hormone on spermiation in roughscale sole was investigated by implanting different concentrations of a salmon gonadotrophin-releasing hormone analog (sGnRH; 0, 25, 50, and 100 μg/kg body weight) into male fishes. The control group did not produce sperm after 21 days post-implantation, and the duration of spermiation was shorter compared to the other groups. The spermiation period and milt amount differed among the hormone-treated groups according to the hormone concentration used. Milt volumes in the groups treated with 25 and 100 μg/kg sGnRH increased compared to the control group, whereas exogenous hormone treatment had no effect on the movable sperm ratio. The spermatocrit was high at the beginning of spermiation in all groups and then tended to decrease gradually over time except in the experimental group treated with 100 μg/kg sGnRH. Plasma levels of testosterone, 11-ketotestosterone, 17α, 20β-dihydroxy-4-pregnen-3-one were not significantly affected by the sGnRH treatments.
Our results demonstrate that it is possible to prolong the spermiation period and increase milt volume by treating male roughscale soles with an exogenous hormone. In addition, the artificial hormone treatment did not affect sperm motility.
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등록된 정보가 없습니다.
참고문헌 (26)
참고문헌 신청
Canario AVM / 1991 / Levels of 17α, 20α-dihydroxy-4-pregnen-3-one, 3β, 17α, 20α-trihydroxy-5β-pregnane, and other sex steroids, in blood plasma of male dab, Limanda limanda (marine flatfish) injected with human chorionic gonadotrophin / Gen Comp Endocrinol 83:258~264
Carolsfeld J / 1988 / Induced sexual maturation of herring using GnRH ‘quick-release’cholesterol pellets / Aquaculture 70:169~181
Clearwater SJ / 1998 / Gonadotropin releasing hormone-analogue treatment increases sperm motility, seminal plasma pH and sperm production in yellowtail flounder Pleuronectes ferrugineus / Fish Physiol Biochem 19:349~357
Harmin SA / 1993 / Influence of gonadotropic hormone-releasing hormone analog(GnRH-A)on plasma sex steroid profiles and milt production in male winter flounder, Pseudopleuronectes americanus(Walbaum) / Fish Physiol Biochem 10:399~407
Hunter GA / 1983 / 5 Hormonal sex control, and its application to fish culture / Fish Physiol 9:223~303
Carolsfeld J / 1988 / Induced sexual maturation of herring using GnRH ‘quick-release’cholesterol pellets / Aquaculture 70:169~181
Clearwater SJ / 1998 / Gonadotropin releasing hormone-analogue treatment increases sperm motility, seminal plasma pH and sperm production in yellowtail flounder Pleuronectes ferrugineus / Fish Physiol Biochem 19:349~357
Harmin SA / 1993 / Influence of gonadotropic hormone-releasing hormone analog(GnRH-A)on plasma sex steroid profiles and milt production in male winter flounder, Pseudopleuronectes americanus(Walbaum) / Fish Physiol Biochem 10:399~407
Hunter GA / 1983 / 5 Hormonal sex control, and its application to fish culture / Fish Physiol 9:223~303
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