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題 名 | 體長對點帶石斑Epinephelus coioides殘食之影響=The Effect of Body Length on Cannibalism in Grouper Epinephelus Coioides |
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作 者 | 葉信利; 陳炯宏; 朱永桐; 許晉榮; 丁雲源; 莫顯喬; | 書刊名 | 水產研究 |
卷 期 | 4:2 1996.12[民85.12] |
頁 次 | 頁143-150 |
分類號 | 439.5 |
關鍵詞 | 殘食; 點帶石斑; Cannibalism; Epinephelus coioides; |
語 文 | 中文(Chinese) |
中文摘要 | 石斑魚的培育過程中,經常發生殘食 (Cannibalism) 現象,即石斑魚 互相吞食的情形,易造成育苗上很大損失。為瞭解石斑魚的殘食行為,乃以點 帶石斑 Epinephelus coioides為材料,進行體長差異實驗,來探討因魚體大小對 石斑魚殘食性之影響。經由結果發現,體長 (全長) 6公分以下的魚苗,較容易 發生殘食。在沒有體長差異的實驗組中,體長由26.19 mm至57.89 mm間,只 有一組發生殘食現象,其殘食率為0.022。在有體長差異的實驗組裡,有一組體 長相差4.13 mm,沒有發生殘食現象,其餘體長有差異的各組均有殘食現象發 生。發生殘食行為,其捕食者體長(x)跟被捕食者體長(y)的關係為 y=23.65 Ln(x) - 59.99,r=0.912,沒有發生殘食行為時則為 y= 24.71Ln(x) - 60.54,r=0.926。 殘食機率值(p)的關係則為單位為mm,e=2.7182,而且體長差異大,殘食機 率值有增高之趨勢。同時,顯示捕食者與被捕食者間是否發生殘食行為與兩者 之間體長差距有相對的關係。 |
英文摘要 | Cannibalism often happens in culture procedure of groupers' fries. They are ease eat up each other to increase costs of aquaculture. In order to understand how cannibalistic behavior effect on groupers, we try to study the effect of body length on cannibalistic rate in grouper Epinephelus coioides. The result was found that the fish body length less than 6 cm had more tendencies on cannibalism. Cannibalistic rates of grouper tests less 0.022 were no body length differences between predator and prey. In different distance experiments of body length cannibalistic rate, only one test was zero and the other tests more than 0.2 were varied distance between predator's and prey's length. Relationship between body lengths of predator (x) and prey (y) for cannibalistic behavior were y=23.65 Ln (x) - 59.99 r=0.912, and no cannibalistic behavior y= 24.71 Ln (x) - 60.54 r=0.926 in body length equation was also calculated. The relationship of cannibalistic probability predict (p) between predator (x) and prey (y) body length in grouper equation were calculated: , and body length unit was mm, e=2.7182. It showed that whether cannibalism happens or not depended upon the body length of predator and prey. |
本系統中英文摘要資訊取自各篇刊載內容。