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Article: Functional hermaphroditism in teleosts

TitleFunctional hermaphroditism in teleosts
Authors
KeywordsAdaptive significance
Gonadal morphology
Gonadal ontogeny
Phylogeny
Sex change
Sexual pattern
Issue Date2008
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FAF
Citation
Fish And Fisheries, 2008, v. 9 n. 1, p. 1-43 How to Cite?
AbstractTeleost fishes are characterized by a diversity of sexual patterns. Hermaphroditism, the expression of both male and female reproductive function in a single individual, generates the most curiosity and controversy. Yet diagnosis of this form of sexuality continues to challenge workers, in particular the distinction between functional and non-functional hermaphroditism. This distinction, reflected as it is in the relationships between gonad form and function, is important if we wish to improve our understanding of the origin of hermaphroditism in the teleosts and of its highly sporadic expression today. Although structure can indicate phylogenetic affinities, it does not always reflect reproductive function, and function is important for understanding adaptation. With resurgent interest in hermaphroditism comes the recognition that understanding sexual pattern is not only important for better knowledge of reproductive biology and ecology but may also elucidate phylogenetic relationships. On the basis of a conservative and clearly defined set of diagnostic criteria, which incorporate new accounts of hermaphroditic species, and by applying an improved understanding of gonadal ontogeny, a comprehensive review and careful re-examination of all primary literature was conducted. This overview documents the incidence of hermaphroditism in teleosts and explores its phylogenetic distribution, possible origin and range of expression. The review confirms functional hermaphroditism in 27 teleost families in seven orders, predominantly among tropical, marine perciforms in which its diversity of expression is greatest. In families with functional hermaphrodites, the sexual pattern is widespread and often highly variable in expression, even within a single genus or between populations. Based on our understanding of gonadal ontogeny in teleosts and on known phylogenetic interrelationships, the origin of functional hermaphroditism is most parsimoniously explained by a proto-hermaphroditic condition in teleosts and cyclostomes, constituting a hermaphroditic potential for these groups. Exploitation and expression of this potential appear to be a response to a suite of environmental and biological factors, opportunities and constraints that result in the independent appearance of the hermaphroditic option in many different fish lineages. © 2008 The Authors.
Persistent Identifierhttp://hdl.handle.net/10722/89331
ISSN
2015 Impact Factor: 8.521
2015 SCImago Journal Rankings: 3.751
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDe Mitcheson, YSen_HK
dc.contributor.authorLiu, Men_HK
dc.date.accessioned2010-09-06T09:55:30Z-
dc.date.available2010-09-06T09:55:30Z-
dc.date.issued2008en_HK
dc.identifier.citationFish And Fisheries, 2008, v. 9 n. 1, p. 1-43en_HK
dc.identifier.issn1467-2960en_HK
dc.identifier.urihttp://hdl.handle.net/10722/89331-
dc.description.abstractTeleost fishes are characterized by a diversity of sexual patterns. Hermaphroditism, the expression of both male and female reproductive function in a single individual, generates the most curiosity and controversy. Yet diagnosis of this form of sexuality continues to challenge workers, in particular the distinction between functional and non-functional hermaphroditism. This distinction, reflected as it is in the relationships between gonad form and function, is important if we wish to improve our understanding of the origin of hermaphroditism in the teleosts and of its highly sporadic expression today. Although structure can indicate phylogenetic affinities, it does not always reflect reproductive function, and function is important for understanding adaptation. With resurgent interest in hermaphroditism comes the recognition that understanding sexual pattern is not only important for better knowledge of reproductive biology and ecology but may also elucidate phylogenetic relationships. On the basis of a conservative and clearly defined set of diagnostic criteria, which incorporate new accounts of hermaphroditic species, and by applying an improved understanding of gonadal ontogeny, a comprehensive review and careful re-examination of all primary literature was conducted. This overview documents the incidence of hermaphroditism in teleosts and explores its phylogenetic distribution, possible origin and range of expression. The review confirms functional hermaphroditism in 27 teleost families in seven orders, predominantly among tropical, marine perciforms in which its diversity of expression is greatest. In families with functional hermaphrodites, the sexual pattern is widespread and often highly variable in expression, even within a single genus or between populations. Based on our understanding of gonadal ontogeny in teleosts and on known phylogenetic interrelationships, the origin of functional hermaphroditism is most parsimoniously explained by a proto-hermaphroditic condition in teleosts and cyclostomes, constituting a hermaphroditic potential for these groups. Exploitation and expression of this potential appear to be a response to a suite of environmental and biological factors, opportunities and constraints that result in the independent appearance of the hermaphroditic option in many different fish lineages. © 2008 The Authors.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FAFen_HK
dc.relation.ispartofFish and Fisheriesen_HK
dc.subjectAdaptive significanceen_HK
dc.subjectGonadal morphologyen_HK
dc.subjectGonadal ontogenyen_HK
dc.subjectPhylogenyen_HK
dc.subjectSex changeen_HK
dc.subjectSexual patternen_HK
dc.titleFunctional hermaphroditism in teleostsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1367-8396&volume=9&spage=1&epage=43&date=2008&atitle=Functional+hermaphroditism+in+teleostsen_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.doi10.1111/j.1467-2979.2007.00266.xen_HK
dc.identifier.scopuseid_2-s2.0-39049090580en_HK
dc.identifier.hkuros150389en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-39049090580&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume9en_HK
dc.identifier.issue1en_HK
dc.identifier.spage1en_HK
dc.identifier.epage43en_HK
dc.identifier.eissn1467-2979-
dc.identifier.isiWOS:000253041800001-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridDe Mitcheson, YS=6603830002en_HK
dc.identifier.scopusauthoridLiu, M=55458147300en_HK
dc.identifier.citeulike2360584-

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