Some biological aspects of thornback Ray (Raja clavata L., 1758) in the Southeastern Black Sea

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dc.contributor.authorDemirhan, Sefa Ayhan
dc.contributor.authorEngin, Semih
dc.contributor.authorSeyhan, Kadir
dc.contributor.authorAkamca, Erhan
dc.date.accessioned2019-07-16T15:47:50Z
dc.date.available2019-07-16T15:47:50Z
dc.date.issued2005
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractFeeding, reproduction and growth of thornback ray {Raja clavata L., 1758) were studied from the South-eastern Black Sea near the Georgian border. Females made up 56% and males 44% of the individuals. The total length (TL) of females ranged from 34.3 to 88.2 cm (21.5-62.7 cm disc width (DW)), and males from 48.0 to 95.0 cm (35.5-61.0 cm DW)). The total length-weight (TL-W), disc width-weight (DW-W) and total length-disc width (TL-DW) relationships were $W=0.001TL^{3.42}$ ( $r^2$ =0.91), $W=0.008DW^{3.21}$ ( $r^2$ =0.94) and DW=0.65TL+2.47 ( $r^2$ =0.88), respectively, for the sexes combined. The total length at 50% maturity (TL50) was about 64.03 cm (44.24 cm DW) for males and about 66.72 cm (47.27 cm DW) for females. Out of 50 stomachs examined, 70% of them were empty. The prey items found in the stomachs were anchovy (Engraulis encrasicolus), horse mackerel (Trachurus trachurus), whiting (Merlangus merlangus euxinus), goby (Gobius sp.), shrimps (Upogobia pusilla, Crangon crangon) and unidentified crab.en_US
dc.description.abstractFeeding, reproduction and growth of thornback ray {Raja clavata L., 1758) were studied from the South-eastern Black Sea near the Georgian border. Females made up 56% and males 44% of the individuals. The total length (TL) of females ranged from 34.3 to 88.2 cm (21.5-62.7 cm disc width (DW)), and males from 48.0 to 95.0 cm (35.5-61.0 cm DW)). The total length-weight (TL-W), disc width-weight (DW-W) and total length-disc width (TL-DW) relationships were $W=0.001TL^{3.42}$ ( $r^2$ =0.91), $W=0.008DW^{3.21}$ ( $r^2$ =0.94) and DW=0.65TL+2.47 ( $r^2$ =0.88), respectively, for the sexes combined. The total length at 50% maturity (TL50) was about 64.03 cm (44.24 cm DW) for males and about 66.72 cm (47.27 cm DW) for females. Out of 50 stomachs examined, 70% of them were empty. The prey items found in the stomachs were anchovy (Engraulis encrasicolus), horse mackerel (Trachurus trachurus), whiting (Merlangus merlangus euxinus), goby (Gobius sp.), shrimps (Upogobia pusilla, Crangon crangon) and unidentified crab.en_US
dc.identifier.endpage83en_US
dc.identifier.issn1303-2712
dc.identifier.issue2en_US
dc.identifier.startpage75en_US
dc.identifier.urihttps://trdizin.gov.tr/publication/paper/detail/TlRrMk16QXc=
dc.identifier.urihttps://hdl.handle.net/20.500.12483/804
dc.identifier.volume5en_US
dc.indekslendigikaynakTR-Dizinen_US
dc.language.isoenen_US
dc.relation.ispartofTurkish Journal of Fisheries and Aquatic Sciencesen_US
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanıen_US]
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectZoolojien_US
dc.subjectBalıkçılıken_US
dc.titleSome biological aspects of thornback Ray (Raja clavata L., 1758) in the Southeastern Black Seaen_US
dc.typeArticleen_US

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