SEAFDECINSTITUTIONAL REPOSITORY
    • English
    • ไทย
    • 日本語
    • Bahasa Indonesia
    • Bahasa Melayu
    • Burmese
    • Filipino
    • Khmer
    • Lao
    • Tiếng Việt
  • Tiếng Việt 
    • English
    • ไทย
    • 日本語
    • Bahasa Indonesia
    • Bahasa Melayu
    • Burmese
    • Filipino
    • Khmer
    • Lao
    • Tiếng Việt
  • Đăng nhập
Xem mặt hàng 
  •   Trang chủ DSpace
  • 03 SEAFDEC External Publications
  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Journal Articles
  • AQD Journal Articles
  • Xem mặt hàng
  •   Trang chủ DSpace
  • 03 SEAFDEC External Publications
  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Journal Articles
  • AQD Journal Articles
  • Xem mặt hàng
JavaScript is disabled for your browser. Some features of this site may not work without it.

Reproductive development of the threatened giant grouper Epinephelus lanceolatus

Thumbnail
Quan điểm/Open
Request this document
Ngày
2019-05-02
Tác giả
Palma, Peter
Takemura, Akihiro
Libunao, Gardel Xyza
Superio, Joshua
de Jesus-Ayson, Evelyn Grace
Ayson, Felix
Nocillado, Josephine
Dennis, Lachlan
Chan, Josielou
Thai, Truong Quoc
Ninh, Nguyen Huu
Elizur, Abigail
Page views
124
metadata
Hiển thị bản ghi đầy đủ mặt hàng

Cited times in Scopus



Share 
 
trừu tượng
The giant grouper is presumed to follow the reproductive pattern of most Epinephelus species, characterized by protogynous hermaphroditism wherein male maturation is attained through sex reversal of a functional female. This hypothesis, however, has not been verified due to lack of biological data. The present study addresses this gap by investigating the reproductive development of giant groupers from juvenile stage through sexual maturity. Gonad histological analysis of hatchery-bred juvenile giant grouper from Queensland, Australia (0.8–5.2 kg, n = 43) have shown earliest occurrence of primary oocytes (i.e. ovarian differentiation) in 47.8 cm and 2.5 kg fish. Monitoring of sexual maturity by gonadal biopsy was performed in a stock of wild-caught giant groupers (2–52 kg) held in sea cages in the Philippines and Vietnam from 2015 to 2017. Onset of female sexual maturity was at 96.9 ± 1.6 cm and 23.5 ± 1.5 kg in the Philippines, and 103.0 ± 4.1 cm and 33.5 ± 2.5 kg in Vietnam. In both locations, development of primary males was observed wherein fish produced milt (or spermiated) without passing through a functional female phase. The ratio of primary males to females in both locations was about 1:2. Size at maturity of primary males is 86.5 ± 4.8 cm and 17.1 ± 2.1 kg in the Philippines, and 97.3 ± 1.3 cm and 34.3 ± 0.9 kg in Vietnam. To aid in the monitoring of female maturation, we developed a non-invasive method based on immunoassay of vitellogenin in skin mucus and this was shown to be effective in detecting female maturation 9 ± 2 months prior to first observation of oocytes through gonadal biopsy. Our findings suggest that giant grouper is a diandric protogynous hermaphrodite. This study provides novel information on the reproductive biology of giant grouper, an economically important and vulnerable species.
URI
http://hdl.handle.net/10862/3449
Suggested Citation
Palma, P., Takemura, A., Libunao, G. X., Superio, J., de Jesus-Ayson, E. G., Ayson, F., ... & Elizur, A. (2019). Reproductive development of the threatened giant grouper Epinephelus lanceolatus. Aquaculture, 509, 1-7.
DOI
10.1016/j.aquaculture.2019.05.001
Chủ thể
sexual maturity ASFA; vitellogenesis ASFA; ELISA ASFA; groupers AGROVOC; Epinephelus lanceolatus AGROVOC
Bộ sưu tập
  • AQD Journal Articles [1175]

© SEAFDEC 2023
Liên hệ chúng tôi
 

 

Duyệt qua

Tất cả DSpaceCộng đồng & Bộ sưu tậpTheo ngày phát hànhCác tác giảTiêu đềĐối tượngBộ sưu tập nàyTheo ngày phát hànhCác tác giảTiêu đềĐối tượng

Tài khoản của tôi

Đăng nhậpĐăng ký

Statistics

View Usage Statistics
Related Links
SEAFDEC/TD IRSEAFDEC/AQD IRSEAFDEC/MFRDMD IRSEAFDEC/IFRDMD IR

© SEAFDEC 2023
Liên hệ chúng tôi