Evaluation of Starvation Status of Laboratory-Reared Japanese Flounder Paralichthys olivaceus Larvae and Juveniles Based on Morphological and Histological Characteristics
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- Gwak Woo-Seok
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
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- Seikai Tadahisa
- Fisheries Research Station, Graduate School of Agriculture, Kyoto University
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- Tanaka Masaru
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
書誌事項
- タイトル別名
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- Evaluation of Starvation Status of Laboratory-Reared Japanese Flounder <i>Paralichthys olivaceus</i> Larvae and Juveniles Based on Morphological and Histological Characteristics
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抄録
Japanese flounder Paralichthys olivaceus larvae and early juveniles were reared for 43 days after hatching in order to observe the effects of starvation during development and metamorphosis. Morphological and histological measurements were made to assess the nutritional status during growth and starvation from prematamorphic through postmetamorphic phases. Two groups of fish were compared; one with sufficient food supply and one under continuous starvation until death. The activity changes of fish during starvation were also observed.<br> Among morphometric analyses, both ratios of body height at anus/head height and pre-/postanal lengths appeared to be sensitive to starvation during which substantial reduction was observed within a day of food deprivation. Starved fish gradually decreased swimming speed as starvation proceeded and finally stayed motionlessly on the tank bottom. Histological variables as intestinal and rectal epithelial heights and gall bladder volume changed significantly with onset of starvation. The gut epithelial heights of starving fish decreased with advances in starvation, although they fluctuated during the mid-metamorphic phase. In contrast, gall bladder volume increased remarkably soon after starvation. Ontogenetic changes in both gut epithelial height and gall bladder volume were evident, those associated with settlement and/or completion of metamorphosis. These findings suggest that a combination of morphologically and histologically sensitive characteristics could be utilized as a reliable measures to evaluate the nutritional status related to starvation in wild Jaoanese flounder larvae.
収録刊行物
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- Fisheries science
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Fisheries science 65 (3), 339-346, 1999
公益社団法人 日本水産学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390282679406888832
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- NII論文ID
- 130003903379
- 10004878695
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- NII書誌ID
- AA10993718
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- NDL書誌ID
- 4767266
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- ISSN
- 09199268
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可