@article{oai:u-ryukyu.repo.nii.ac.jp:02019596, author = {是枝, 伶旺 and 本村, 浩之}, journal = {Fauna Ryukyuana}, month = {Jan}, note = {コブキカイウツボを沖縄島から 5 個体 ( 全長 173.1–301.6 mm), ホシキカイウツボを沖縄島と石垣島から 4 個体 ( 全長 92.6–187.1 mm) 採集した . 両種は奄美群島と台湾からの記録があるが , その中間に位置する沖縄県は分布の空白域であった . したがって , 今回得られた標本は両種の沖縄県初記録となる . 本研究においてコブキカイウツボとホシキカイウツボを得た環境は , 主に干潮時には完全に干出する岩礁性海岸の岩陰に堆積した砂礫中である . 同様の環境からは , 稀種シズクキカイウツボをはじめにアミキカイウツボとクモウツボも採集された . 干潮時には完全に干出する様な潮間帯の転石帯や砂礫が , 多様な大きさのホシキカイウツボやアミキカイウツボに利用され , コブキカイウツボ , シズクキカイウツボ , およびクモウツボの小型の個体に利用されていること , ホシキカイウツボがコブキカイウツボ同様に恐らく摂餌を目的として河口域に出現することがあること , コブキカイウツボとホシキカイウツボは波当たりの強い岩礁性海岸に出現し , アミキカイウツボは比較的波穏やかな環境に出現すること , コブキカイウツボとホシキカイウツボの差異である体高と体幅は傾向的なもので重複すること , シズクキカイウツボ , アミキカイウツボ , クモウツボは稚魚期に無斑または斑紋が不明瞭である可能性があること ( 少なくともアミキカイウツボの稚魚は無斑 ) が明らかとされた . これらのうち , 特に茶色で無斑のアミキカイウツボの稚魚はコゲウツボと似るが , 下顎感覚管の開孔数が 5 であることで異なる ( 奄美大島産のコゲウツボでは 6)., Five specimens (173.1–301.6 mm total length) of Uropterygius oligospondylus Chen, Randall and Loh, in Loh et al., 2008 were collected from Okinawa-jima Island, and four specimens (92.6–187.1 mm total length) of Uropterygius sp. sensu Hatooka, 2000 were collected from Okinawa-jima and Ishigaki-jima islands. Although the two species have been recorded from Amami-oshima Island (Kagoshima Prefecture) and Taiwan, they have at not been reported from Okinawa Prefecture located between Amami and Taiwan. Thus, the current specimens represent the first records of U. oligospondylus and Uropterygius sp. sensu Hatooka, 2000 from Okinawa Prefecture. Most specimens were collected from gaps under stones or deposited gravels on reef shores exposed at low tide. In addition, some specimens of Echidna nebulosa, U. marmoratus, and U. micropterus were also collected from similar environments to where U. oligospondylus was found. Our study showed that various sized individuals of Uropterygius sp. sensu Hatooka, 2000 and U. micropterus and young individuals of E. nebulosa, U. marmoratus, and U. oligospondylus inhabit environments such as under gravel and/or stones exposed during lower tides. Uropterygius oligospondylus and Uropterygius sp. sensu Hatooka, 2000 occur on rough-rocky beaches. Uropterygius micropterus lives in relatively calm areas, and Uropterygius sp. sensu Hatooka, 2000 sometimes appears in estuaries and probably feeds on bait as does U. oligospondylus. Differences in body depth and width between O. oligospondylus and Uropterygius sp. sensu Hatooka, 2000, previously regarded as diagnostic, are not distinct, but tendentious. Color patterns of E. nebulosa, U. marmoratus, and U. micropterus change with growth and their juveniles have no distinct color patterns (completely plain body color at least in juveniles of U. micropterus). Although juveniles of U. micropterus with plain body color are similar to U. concolor, the former differs from the latter in having five mandibular pores (6 in U. conclor).}, pages = {15--27}, title = {沖縄県初記録のコブキカイウツボとホシキカイウツボ, および潮間帯の礫中から得られるウツボ科魚類の記録}, volume = {66}, year = {2023} }