頁籤選單縮合
題名 | Influence of Turning over Pond Soil on Growth of the Hard Clam, Meretrix Iusoria=翻掘池底對文蛤成長(Meretrix Iusoria)的影響 |
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作者 | 鍾國仁; 何雲達; 郭仁杰; | 書刊名 | 臺灣水產學會刊 |
卷期 | 27:3 2000.09[民89.09] |
頁次 | 頁233-239 |
分類號 | 439.61 |
關鍵詞 | 文蛤; 養殖; 底質; Meretrix lusoria; Culture; Pond soil; |
語文 | 英文(English) |
中文摘要 | 本報告探討定期翻掘養殖池的底土是否能維持良好的底質,使文蛤有較佳的活存率與成長,試驗結果顯示翻土可將底質維持在較佳的狀況,對成長皆有正面的效果,翻土可能會造成少數的文蛤倉促閉殼咬傷斧足,但沒有明顯地提高死亡率。翻土除了直接改善底質之外,亦促使文蛤潛藏在較深的底土中,除了有利於成長之外,文蛤的上下移動對底質的改良應有正面的影響。 |
英文摘要 | In this experiment the soil in which clams were reared was turned over periodically to see whether the treatment benefited the growth of the clams. After having been reared for 126 days, the growth of clams in the group treated every half a month did no differ significantly from that of the group treated every month. Further the results of both groups were better than that of the untreated group. It was inferred from observations of three large collections of the clams that a few of the clams might have injured their own foot by suddenly closing their shells when frightened by the turning over of the pond soil. However, no significant increase in mortality occurred in the treated groups. The clams of the treated groups burrowed more deeply into the soil than did those of the untreated group. Vertical crawls of the clams might improve the condition of the substratum. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。