Evaluation in a Shrimp Aquaculture System Using Mangroves, Oysters, and Seaweed as Biofilters Based on the Concentrations of Nutrients and Chlorophyll a
ISSN | 00213551 |
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書誌レコードID(総合目録DB) | AA0068709X |
Water from shrimp aquaculture ponds was circulated through a mangrove woodlot, oyster beds, and seaweed ponds in biofilter experiments designed to reduce environmental loads. Though the nutrient concentrations in the shrimp culture ponds were lower than those in the other ponds in many cases, the Chl. α concentration increased explosively in shrimp ponds and exceeded 160 μg/L. These results suggested that nutrients were used for the growth of phytoplankton. The Chl. α concentration was very low in the oyster pond, and it was suggested that oyster feed actively on phytoplankton. Ammonia was always lower in the seaweed ponds than in the oyster ponds, which suggested that seaweed took up ammonia. From the nitrogen budget, 27% of nitrogen in supplied feed was incorporated into shrimp, 32% was flowed to mangrove, oyster and seaweed ponds and removed with these biofilters, and 9% was added in the aquaculture system as dissolved inorganic and particulate nitrogen. Therefore, this aquaculture system using mangroves, oyster and seaweed as biofilters was thought to be effective to reduce the environmental load.
刊行年月日 | |
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作成者 | SHIMODA Toru SURYATI Emma AHMAD Taufic |
著者キーワード |
budget environment nitrogen phosphorus phytoplankton |
公開者 | Japan International Research Center for Agricultural Sciences |
オンライン掲載日 | |
国立情報学研究所メタデータ主題語彙集(資源タイプ) | Journal Article |
巻 | 40 |
号 | 2 |
開始ページ | 189 |
終了ページ | 193 |
DOI | 10.6090/jarq.40.189 |
権利 | Japan International Research Center for Agricultural Sciences |
言語 | eng |