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dc.contributor.authorKajiura, Stephen
dc.contributor.authorTricas, Timothy C.
dc.date.accessioned2017-11-01T19:13:59Z
dc.date.available2017-11-01T19:13:59Z
dc.date.issued1996-10
dc.identifier.citationKajiura, S. M., & Tricas, T. C. (1996). Seasonal dynamics of dental sexual dimorphism in the atlantic stingray dasyatis sabina. Journal of Experimental Biology, 199(10), 2297-2306.en_US
dc.identifier.issn00220949
dc.identifier.urihttp://hdl.handle.net/11141/2161
dc.descriptionDasyatidae, Dasyatis sabina, dentition, elasmobranch, phenotypic plasticity, seasona,l sexual dimorphism, stingray, tooth morphology, Chondrichthyes, Dasyatidae, Dasyatis sabina, Pisces, Sabina, Vertebrataen_US
dc.description.abstractCartilaginous fishes continuously replace their teeth throughout their life (polyphyodonty) and often show a sexually dimorphic dentition that was previously thought to he an invariant sex character. Radial vector analysis of tooth shape in the polyphyodontic stingray Dasyatis sabina across a consecutive 24 month period shows a stable molariform morphology for females but a periodic shift in male dentition from a female-like molariform to a recurved cuspidate form during the reproductive season. The grip tenacity of the male dentition is greater for the cuspidate form that occurs during the mating season than for the molariform dentition that occurs during the non- mating season. Dental sexual dimorphism and its sex-dependent temporal plasticity probably evolved via polyphyodontic preadaptation under selective pressures on both sexes for increased feeding efficiency and sexual selection in males to maximize mating success. These phenomena are important considerations for the identification and classification of cartilaginous fishes and possibly other polyphyodontic vertebrates in the fossil record.en_US
dc.language.isoen_USen_US
dc.rightsCopyright © 1996 the authorsen_US
dc.rights.urihttp://jcs.biologists.org/content/rights-permissionsen_US
dc.titleSeasonal dynamics of dental sexual dimorphism in the Atlantic stingray Dasyatis sabinaen_US
dc.typeArticleen_US


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