Geographic Variation of Maturity Size of the Cloudy Catshark, Scyliorhinus torazame, in Japan.
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Accession number;02A0361576
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| Title;Geographic Variation of Maturity Size of the Cloudy Catshark, Scyliorhinus torazame, in Japan. |
| Author;
HORIE T
(Tokai Univ.)
TANAKA S
(Tokai Univ.)
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Journal Title;Journal of the Faculty of Marine Science and Technology, Tokai University
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Journal Code:Z0956A
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ISSN:0375-3271
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VOL.;NO.53;PAGE.111-124(2002)
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| Figure&Table&Reference;FIG.6, TBL.3, REF.24 |
| Pub. Country;Japan |
| Language;English |
| Abstract;The present study provides information on the geographic variation in maturity size of the cloudy catshark, Scyliorhinus torazame, in Japan. A total of 133 from Aomori Prefecture, 114 from Fukushima Prefecture, 88 from Ibaraki Prefecture and 87 from Tsushima Island were used for the present research. Size at sexual maturity in females was considered to be over 370mm TL in Aomori, range of 330-390mm TL in Fukushima, over 350mm TL in Ibaraki and over 330mm TL in Tsushima specimens. Size at sexual maturity in males was considered to be over 390mm TL in Aomori, over 350mm TL in Fukushima and under 330mm TL in Tsushima specimens. Size at sexual maturity of the cloudy catshark tended to become larger with the decline of water temperature. Size difference of egg capsules in the cloudy catshark was not observed by location. (author abst.) |
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