Juveniles of two sillaginids,Sillago aeolus andS. sihama,occurring in a surf zone in the Philippines |
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| Authors: | Mitsuhiro Kato Hiroshi Kohno Yasuhiko Taki |
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| Institution: | (1) Laboratory of Ichthyology, Tokyo University of Fisheries, 4-5-7 Konan, Minato-ku, 108 Tokyo, Japan;(2) Present address: Fisheries Research Institute of Kanagawa Prefecture, Jogashima, Miura, 238-02 Kanagawa, Japan |
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| Abstract: | Sillaginid juveniles collected from the surf zone at Tigbauan, Iloilo, Philippines, between May 1986 and September 1987 were
identified asSillago aeolus (n=702, 8.9–26.0 mm SL) andS. sihama (n=3414, 8.6–22.9 mm SL), based on the numbers of dorsal and anal soft fin rays and vertebrae. The two species were easily distinguishable
by the pattern of melanophores distributed on the caudal fin base,S. aeolus having a triangular-shaped cluster, whereas the melanophores formed a vertical line inS. sihama. The ratios of pre-anal and caudal peduncle lengths to SL also differed between the species, both being higher inS. aeolus. The occurrence ofS. aeolus was limited to the dry season, from January to March. On the other hand,S. sihama occurred year-round, although a peak was observed in the dry season, from November to April. |
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| Keywords: | Sillago aeolus Sillago sihama juvenile morphology surf zone seasonal occurrence |
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