Biological observations on the common guitarfish Rhinobatos rhinobatos from Iskenderun Bay (Turkey, Eastern Mediterranean)

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dc.authoridBasusta, Nuri/0000-0002-4260-4772
dc.contributor.authorCek, Sehriban
dc.contributor.authorBasusta, Nuri
dc.contributor.authorDemirhan, Sefa Ayhan
dc.contributor.authorKaralar, Murat
dc.date.accessioned2024-09-18T20:55:49Z
dc.date.available2024-09-18T20:55:49Z
dc.date.issued2009
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractHistological examination of the gonads showed that spermatogenesis occurs in every male R. rhinobatos collected in autumn and winter months of the year. The testis was composed of lobes having numerous spermatocysts in a dorsoventral zonated arrangement. Present results suggest that since R. rhinobatos have a cystic mode of spermatogenesis it can be used as a model for biomedical and toxicological studies. Eight stages of maturation for females and seven stages of maturation for males were identified. Moreover, vitellogenic oocytes were consistently found in every female collected during the summer months. In vitellogenic oocytes, yolk is present as pleomorphic droplets and very often; small yolk droplets have a crystalline configuration. These data suggest that both sexes are reproductively active at different times of the year. Both, the right ovary/testis and the left ovary/testis were functional. Ripe oocytes in the ovaries were usually symmetrically distributed. The population consisted of aplacental viviparous individuals with lecithotrophic embryo development. Although, sex ratios of R. rhinobatos were not significantly different from the expected 1:1 ratio (p>0.05), slightly female biased sex ration were recorded. (C) Koninklijke Brill NV, Leiden, 2009en_US
dc.identifier.doi10.1163/157075609X437727
dc.identifier.endpage230en_US
dc.identifier.issn1570-7555
dc.identifier.issn1570-7563
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-72449170087en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage211en_US
dc.identifier.urihttps://doi.org/10.1163/157075609X437727
dc.identifier.urihttps://hdl.handle.net/20.500.12483/12064
dc.identifier.volume59en_US
dc.identifier.wosWOS:000267565100006en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherBrillen_US
dc.relation.ispartofAnimal Biologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectRhinobatos rhinobatosen_US
dc.subjectgametogenesisen_US
dc.subjectreproductive cycleen_US
dc.subjectsex ratioen_US
dc.subjectTurkeyen_US
dc.subjectEastern Mediterraneanen_US
dc.titleBiological observations on the common guitarfish Rhinobatos rhinobatos from Iskenderun Bay (Turkey, Eastern Mediterranean)en_US
dc.typeArticleen_US

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