지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1998.11
- 수록면
- 529 - 546 (18page)
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Gonadal part that developed by indifferentiation period for 6 months after hatching is made as gonad and fat body. These gonad are thin semi-transparant and undevelopment with undistinguished germ cell. Germinal epithelium is distinguished by development of gonad epithelial tissue from 7 months after hatching. Sex differentiation is begun by oogonia development at 8 months after hatching. Primary oocytes grow over germinal epithelium of gonadal cavity, at 9 months after hatching, gonadal cavity become ovarian cavity as they are increasing. As soon as oocytes at 13 months after hatching are filled with the whole part of gonad, degeneration of oocyte is begun. And then, gonad has cavity tissue, a small number of oocyte are located in gonadal cavity. At 15 months after hatching, new primary oocyte develop and consist of ovarian tissue in the central of ovarian cavity. Spermatogonia multiplicate and cavity tissue consist of testicular tissue. These gonad become hermaphrodite and then determine the sex of female and male. These results show the red sea bream is juvenile hermaphrodite and undifferentiated gonochoristic teleost. Male and female differentiation type of gonad is divided in undifferentiation stage, oogonia-like stage, ovary-like stage, ovary development stage, hermaphroditic testis stage, hermaphroditic ovary stage, and testis development stage. Undifferentiation stage is continued total length 18㎝ at 13 months after hatching. Oogonia-like stage is continued total length 11~18㎝ at 7~13 months after hatching. Ovary-like stage is continued total length 14~26㎝ at 10~14 months after hatching. Ovary development stage begins from total length 20㎝, 14 months after hatching. At 20 months after hatching, 44 percent of total sampled individuals had ovary. Hermaphroditic ovary stage first begins total length 19~20㎝ at 15 months after hatching, but it is not observed total length 28~29㎝ at 20 months after hatching. Hermaphroditic testis stage first begins total length 21~22㎝ at 20 months after hatching and is continued for 20 months. Testis development stage first begins total length 20~21㎝ at 20 months after hatching, and is occupied 33 percent total length 28~29㎝, 39 percent of 20 months. The beginning of sex differentiation more than 50 percent is from total length 16㎝ at 11 months after hatching. Sex determination begins total length 20㎝, 14months after hatching in female and total length 20㎝, 15months after hatching in male.
Sex determination more than 50 percent begins total length 23㎝, 17months after hatching. Undifferentiated gonadal part of red sea bream consist gonad and fat body. As differentiation is going on and gonad is growing, fat body shrinks. This appearence is showed the same tendency in 3-year old red sea bream. 1.9mm larvae after hatching grow about 19mm larvae for 47 days. The relationship between the total length and body weight of larvae and juveniles is BW=4.45×10^(-6)TL^(3.4718), r=0.9820. Fishes in cage culture grow to maximum total length 28.4㎝.
The relationship between the total length and body weight of these fishes is BW= 2.36×10^(-2)TL^(2.9180), r=0.9971. Undifferentiated gonadal part of red sea bream consist gonad and fat body. As differentiation is going on and gonad is growing, fat body shrinks.
Sex determination more than 50 percent begins total length 23㎝, 17months after hatching. Undifferentiated gonadal part of red sea bream consist gonad and fat body. As differentiation is going on and gonad is growing, fat body shrinks. This appearence is showed the same tendency in 3-year old red sea bream. 1.9mm larvae after hatching grow about 19mm larvae for 47 days. The relationship between the total length and body weight of larvae and juveniles is BW=4.45×10^(-6)TL^(3.4718), r=0.9820. Fishes in cage culture grow to maximum total length 28.4㎝.
The relationship between the total length and body weight of these fishes is BW= 2.36×10^(-2)TL^(2.9180), r=0.9971. Undifferentiated gonadal part of red sea bream consist gonad and fat body. As differentiation is going on and gonad is growing, fat body shrinks.
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UCI(KEPA) : I410-ECN-0101-2009-529-015350286