養殖マダイPagrus majorにおける消化管内容物の変化と残餌・糞に基づく炭素および窒素負荷
書誌事項
- タイトル別名
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- Postprandial Changes in Digesta, Leftovers and Feces, and Their Carbon and Nitrogen contents in Cultured Red Sea Breams, Pagrus major
- ヨウショク マダイ Pagrus major ニ オケル ショウカカン ナイヨウブツ ノ ヘンカ ト ザンジ フン ニ モトズク タンソ オヨビ チッソ フカ
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抄録
For establishing a sustainable aquaculture for red sea bream, we examined postprandial changes in digesta and suspending matter discharged as leftovers and feces. Gastral digestion for extruded pellet (EP) needed 24 h in the fish weighing 158 g at water temperature rage of 20.3 - 26.6°C. Enteral digestion for EP almost ceased at about 72 h after feeding. The C/N ratio of suspending matter was similar to EP until 3h after feeding, and rapidly rose after then. This suggested that suspending matter until 3h after feeding and after then was originated from leftovers and feces, respectively. EP given was discharged as leftovers and feces ranges of 3.6-15.4 and 4.1-14.7%, respectively. Moist pellet (MP) given was also discharged as leftovers and feces ranges of 10.1-19.2 and 2.6 -10.8%, respectively. Feed intake, leftovers and feces of MP were 1.9, 3.5 and 1.5 times greater than those of EP, respectively. Until 3h after feeding EP, N in leftovers was at the range of 48.3-57.4% of total N discharged. Therefore, it is intensely recommended that preferable feeding restriction with EP is effective for conducting nitrogen load reduction and sustainable aquaculture for red sea bream.
収録刊行物
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- 水産増殖
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水産増殖 55 (3), 409-415, 2007
日本水産増殖学会
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詳細情報 詳細情報について
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- CRID
- 1390001204716356352
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- NII論文ID
- 10019951456
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- NII書誌ID
- AN00124667
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- ISSN
- 21850194
- 03714217
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- NDL書誌ID
- 8970897
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
- CiNii Articles
- Crossref
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- 抄録ライセンスフラグ
- 使用不可