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Article: Forehead morphology of the humphead wrasse cheilinus undulatus (Perciformes: Labridae) in relation to body size

TitleForehead morphology of the humphead wrasse cheilinus undulatus (Perciformes: Labridae) in relation to body size
Authors
Issue Date2011
Citation
Copeia, 2011 n. 2, p. 315-318 How to Cite?
AbstractThe distinctive hump on the forehead of large individuals of the Humphead Wrasse, Cheilinus undulatus, a protogynous hermaphroditic reef fish, is often assumed to be a male-associated secondary sexual characteristic, but this has never been evaluated. A unique opportunity arose to obtain confiscated specimens, 161 females and 17 males, ranging in body sizes from 20.8 to 129.0 cm total length (TL), making this evaluation possible for the first time. The hump was quantified in terms of its maximum angle of elevation, and its development was determined to be size-associated. A notable hump was recorded in 16 females and all 17 males, becoming visible around 37.0 cm TL, and all specimens ≥ 75.0 cm TL exhibited a distinctive hump, irrespective of sex. There was a linear and positive correlation between body size and maximum angle of hump elevation for both sexes; males tended to have larger humps because they were larger in body size rather than because of sexual dimorphism for hump development. The development of a cephalic hump or a horn on the forehead has been documented in several groups of reef fishes, and its possible adaptive significance in different groups is discussed. © 2011 by the American Society of Ichthyologists and Herpetologists.
Persistent Identifierhttp://hdl.handle.net/10722/165988
ISSN
2015 Impact Factor: 1.144
2015 SCImago Journal Rankings: 0.555
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, Men_HK
dc.contributor.authorSadovy De Mitcheson, Yen_HK
dc.date.accessioned2012-09-20T08:26:02Z-
dc.date.available2012-09-20T08:26:02Z-
dc.date.issued2011en_HK
dc.identifier.citationCopeia, 2011 n. 2, p. 315-318en_HK
dc.identifier.issn0045-8511en_HK
dc.identifier.urihttp://hdl.handle.net/10722/165988-
dc.description.abstractThe distinctive hump on the forehead of large individuals of the Humphead Wrasse, Cheilinus undulatus, a protogynous hermaphroditic reef fish, is often assumed to be a male-associated secondary sexual characteristic, but this has never been evaluated. A unique opportunity arose to obtain confiscated specimens, 161 females and 17 males, ranging in body sizes from 20.8 to 129.0 cm total length (TL), making this evaluation possible for the first time. The hump was quantified in terms of its maximum angle of elevation, and its development was determined to be size-associated. A notable hump was recorded in 16 females and all 17 males, becoming visible around 37.0 cm TL, and all specimens ≥ 75.0 cm TL exhibited a distinctive hump, irrespective of sex. There was a linear and positive correlation between body size and maximum angle of hump elevation for both sexes; males tended to have larger humps because they were larger in body size rather than because of sexual dimorphism for hump development. The development of a cephalic hump or a horn on the forehead has been documented in several groups of reef fishes, and its possible adaptive significance in different groups is discussed. © 2011 by the American Society of Ichthyologists and Herpetologists.en_HK
dc.languageengen_US
dc.relation.ispartofCopeiaen_HK
dc.titleForehead morphology of the humphead wrasse cheilinus undulatus (Perciformes: Labridae) in relation to body sizeen_HK
dc.typeArticleen_HK
dc.identifier.emailSadovy De Mitcheson, Y: yjsadovy@hkucc.hku.hken_HK
dc.identifier.authoritySadovy De Mitcheson, Y=rp00773en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1643/CI-10-105en_HK
dc.identifier.scopuseid_2-s2.0-79959968794en_HK
dc.identifier.hkuros211182en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79959968794&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume2011en_US
dc.identifier.issue2en_HK
dc.identifier.spage315en_HK
dc.identifier.epage318en_HK
dc.identifier.isiWOS:000292584000015-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLiu, M=55458219300en_HK
dc.identifier.scopusauthoridSadovy De Mitcheson, Y=6603830002en_HK

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