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タイトル: | Effects of time and duration of rearing with bottom sand on the occurrence and expansion of staining-type hypermelanosis in the Japanese flounder Paralichthys olivaceus |
著者: | Isojima, Toshinori Makino, Naoshi Miyama, Yoshifumi Tagawa, Masatomo ![]() ![]() ![]() |
著者名の別形: | 田川, 正朋 |
キーワード: | Bottom sand Color anomaly Hatchery production Hypermelanosis Individual identification Japanese flounder Staining Time limitation |
発行日: | 22-May-2014 |
出版者: | Springer Japan |
誌名: | Fisheries Science |
巻: | 80 |
号: | 4 |
開始ページ: | 785 |
終了ページ: | 794 |
抄録: | We previously reported that the progression of staining-type hypermelanosis spontaneously ceased at a specific time and area in Japanese flounder Paralichthys olivaceus. To examine whether time is a limiting factor in the spontaneous cessation of staining, we experimentally controlled the initiation and duration of staining by manipulating the bottom substrate condition in the fish tanks. At 151 days post hatching (DPH; 11 weeks), spontaneous cessation of staining was observed in fish reared in tanks without a sandy substrate. However, staining resumed (or was initiated) in tanks where sand was removed from 11 weeks, indicating a strong but temporary effect of bottom sand and the absence of time limitation in the staining progression by 151 DPH. Extended duration of the inhibitory period of hypermelanosis expansion (9 weeks or more) aided in only a 20 % reduction of the final staining area because of the increased rate of staining expansion. The bottom sandy substrate decreased the visibility of the staining area in individuals, but this was observed only before the completion of the staining expansion. These findings are discussed in relation to possible presence of area limitation of future staining, as well as the fundamental nature of staining. |
著作権等: | The final publication is available at Springer via http://dx.doi.org/10.1007/s12562-013-0655-0. 許諾条件により本文は2015-05-22に公開. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/193691 |
DOI(出版社版): | 10.1007/s12562-014-0755-5 |
出現コレクション: | 学術雑誌掲載論文等 |
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