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Article: Gonad development during sexual differentiation in hatchery-produced orange-spotted grouper (Epinephelus coioides) and humpback grouper (Cromileptes altivelis) (Pisces: Serranidae, Epinephelinae)

TitleGonad development during sexual differentiation in hatchery-produced orange-spotted grouper (Epinephelus coioides) and humpback grouper (Cromileptes altivelis) (Pisces: Serranidae, Epinephelinae)
Authors
KeywordsGrouper mariculture
Primary male
Protogynous hermaphroditism
Sex-change
Sexual differentiation
Issue Date2009
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/aquaculture
Citation
Aquaculture, 2009, v. 287 n. 1-2, p. 191-202 How to Cite?
AbstractJuvenile sexual differentiation of two commercially important epinephelines, orange-spotted grouper (Epinephelus coioides) and humpback grouper (Cromileptes altivelis) (Serranidae, Epinephelinae), produced in hatcheries, was studied until first sexual maturation using gonadal histology. Diandric, protogynous hermaphroditism is confirmed for E. coioides with evidence of primary male differentiation directly from the juvenile phase as well as of secondary male development through the sex-change of functional females. All juveniles developed first an ovarian-phase then entered a bisexual-phase gonad. Sexual differentiation occurred in bisexual gonads at around 105 weeks after hatching (wah), with the growth of oocytes beyond the primary-growth stage for females, and the appearance of sperm sinuses and proliferation of spermatogenic cysts in primary males. The minimum size and age of first sexual maturation for females were 355 mm standard length (SL) and 113 wah. No mature males were found by 141 wah, suggesting that first maturation in males takes longer than in females, at least under mariculture conditions. For C. altivelis, all juveniles developed an ovarian-phase gonad. Minimum body size and age of first sexual maturation for females were 155 mm SL and 83 wah. In contrast to E. coioides, there was no sign of spermatogenic cysts in juvenile gonads and any indication of primary male differentiation in C. altivelis. This study reveals the variation in early gonad development in the epinephelines and highlights the importance of studying juvenile sexual differentiation for fully understanding sexual pattern in this fish subfamily. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/60703
ISSN
2015 Impact Factor: 1.893
2015 SCImago Journal Rankings: 1.110
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, Men_HK
dc.contributor.authorde Mitcheson, YSen_HK
dc.date.accessioned2010-05-31T04:16:49Z-
dc.date.available2010-05-31T04:16:49Z-
dc.date.issued2009en_HK
dc.identifier.citationAquaculture, 2009, v. 287 n. 1-2, p. 191-202en_HK
dc.identifier.issn0044-8486en_HK
dc.identifier.urihttp://hdl.handle.net/10722/60703-
dc.description.abstractJuvenile sexual differentiation of two commercially important epinephelines, orange-spotted grouper (Epinephelus coioides) and humpback grouper (Cromileptes altivelis) (Serranidae, Epinephelinae), produced in hatcheries, was studied until first sexual maturation using gonadal histology. Diandric, protogynous hermaphroditism is confirmed for E. coioides with evidence of primary male differentiation directly from the juvenile phase as well as of secondary male development through the sex-change of functional females. All juveniles developed first an ovarian-phase then entered a bisexual-phase gonad. Sexual differentiation occurred in bisexual gonads at around 105 weeks after hatching (wah), with the growth of oocytes beyond the primary-growth stage for females, and the appearance of sperm sinuses and proliferation of spermatogenic cysts in primary males. The minimum size and age of first sexual maturation for females were 355 mm standard length (SL) and 113 wah. No mature males were found by 141 wah, suggesting that first maturation in males takes longer than in females, at least under mariculture conditions. For C. altivelis, all juveniles developed an ovarian-phase gonad. Minimum body size and age of first sexual maturation for females were 155 mm SL and 83 wah. In contrast to E. coioides, there was no sign of spermatogenic cysts in juvenile gonads and any indication of primary male differentiation in C. altivelis. This study reveals the variation in early gonad development in the epinephelines and highlights the importance of studying juvenile sexual differentiation for fully understanding sexual pattern in this fish subfamily. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/aquacultureen_HK
dc.relation.ispartofAquacultureen_HK
dc.subjectGrouper maricultureen_HK
dc.subjectPrimary maleen_HK
dc.subjectProtogynous hermaphroditismen_HK
dc.subjectSex-changeen_HK
dc.subjectSexual differentiationen_HK
dc.titleGonad development during sexual differentiation in hatchery-produced orange-spotted grouper (Epinephelus coioides) and humpback grouper (Cromileptes altivelis) (Pisces: Serranidae, Epinephelinae)en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0044-8486&volume=287&issue=1-2&spage=191&epage=202&date=2009&atitle=Gonad+development+during+sexual+differentiation+in+hatchery-produced+orange-spotted+grouper+(Epinephelus+coioides)+and+humpback+grouper+(Cromileptes+altivelis)+(Pisces:+Serranidae,+Epinephelinae)en_HK
dc.identifier.emailde Mitcheson, YS: yjsadovy@hkucc.hku.hken_HK
dc.identifier.authorityde Mitcheson, YS=rp00773en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.aquaculture.2008.10.027en_HK
dc.identifier.scopuseid_2-s2.0-58049194047en_HK
dc.identifier.hkuros164856en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-58049194047&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume287en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage191en_HK
dc.identifier.epage202en_HK
dc.identifier.isiWOS:000263024200028-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridLiu, M=55458204000en_HK
dc.identifier.scopusauthoridde Mitcheson, YS=6603830002en_HK
dc.identifier.citeulike10689857-

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