著者

岸本 浩和

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:18847374)

巻号頁・発行日

vol.21, no.2, pp.101-107, 1974

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In May 11th, 1973, 399 specimens of <I>Stethojulis</I> were collected in Suruga Bay, ofwhich 33 showed color phase of <I>S.interrupta</I> and 366 that of <I>S.kalosoma</I>.In anaquarium, 312 specimens with"kalosoma"pattern were kept at the water temperature18.3-25.1°C.Some of them changed their color pattern to"<I>interrupta</I>"phase, within10 days.Among 312 specimens, 54 (42 died, 12 alive) changed to <I>S.interrupta</I> phaseand 258 remained in"<I>kalosoma</I>"phase (187 died, 71 alive), by July 31, 1973.Duringthe color change, certain specimens took on color patterns resembling <I>S."trossula"</I>.It was found that individuals of"<I>kalosoma</I>"phase included female, male and indeterminables, whereas those of"<I>interrupta</I>"phase were all males.On the basis ofmorphological characters and color patterns, it was concluded that <I>S.kalosoma</I> and<I>S.trossula</I> are junior synonyms of <I>S.interrupta</I>, and represent different color phasein the course of the sex reversal from female to male.