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練習船長崎丸の採集物報告-1 : トラフザメの卵


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Title: 練習船長崎丸の採集物報告-1 : トラフザメの卵
Other Titles: Collection of the T.S. Nagasaki Maru of Nagasaki University―I Eggs of the Tiger Shark, Stegostoma fasciatum
Authors: 道津, 喜衛
Authors (alternative): Dotsu, Yoshie
Issue Date: Aug-1972
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.33, pp.1-6; 1972
Abstract: Four shark eggs of the same form and size were obtained by operations of the trawl net of the Nagasaki Maru (141ft., 563t.) in the South China Sea off Kuching, North Borneo in 1967 and 1971 (Figs. 1, 2 and Table 1). In the two eggs obtained in August 1971, the embryo, being 166mm and 188mm in total length respectively, had already developed the form and markings of the young of the tiger shark, Stegostoma fasciatum (Hermann), a synonym for S. tigrinum (Gemelin), which had been reported by Day (1876). The eggs are shaped like a flat pillow, measuring 17 to 17.5mm in length, 9 to 10cm in width and 4 to 5cm in thickness, and chocolate in color. They are similar in form and size to the eggs of the tiger shark collected from the Java Sea and the Singapore Fish Market and reported by Smedley (1926), but different from the latter to the effect that they have a mass of adhesive filaments along the long margin of the egg capsule. The eggs are attached with the filaments to a species of Gorgonacea growing on the sea bottom, but the mass of the filaments easily comes off from the egg capsule (Fig. 3)
URI: http://hdl.handle.net/10069/31068
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第33号

Citable URI : http://hdl.handle.net/10069/31068

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