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- Age and Growth of Two Co-occurred Anchovy Species (Encrasicholina puntifer and E. heteroloba) during Autumn Larval Anchovy Fishing Season in I-lan Bay, NE Taiwan
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題 名 | Age and Growth of Two Co-occurred Anchovy Species (Encrasicholina puntifer and E. heteroloba) during Autumn Larval Anchovy Fishing Season in I-lan Bay, NE Taiwan=宜蘭灣兩同出現鯷魚(E.puntifer and E. heteroloba)之成長--兼論視同單一系群之合適性 |
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作 者 | 丘臺生; 陳璋玲; 楊樹森; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 26:4 1999.12[民88.12] |
頁 次 | 頁183-190 |
分類號 | 388.5 |
關鍵詞 | 系群; 矢耳石成長; 成長曲線; 成長率; Stock; Sagittae growth; Gompertz equation; Growth rate; |
語 文 | 英文(English) |
中文摘要 | 秋季宜蘭灣之�等J魚資源係由兩同屬異種之鯷魚-剌鯷(Encrasicholina puntifer ) 及異葉公鯷 (E.heteroloba) 所組成。 曾有一時提議,技術性地將此一資源以單 " 系群 " 加以處理,以達漁業管理上之間便性。為檢驗此舉之合適性,本研究分別估計兩魚種之矢 石 (sagitta) 成長及體長 (standard length) 曲線,然後據之計算其相對及絕對成長率, 並加以比較。比較剌公鯷和異葉公鯷之差異,發現在矢石成長,以及各日齡之體長相對和絕 對成長率,在統計上都有顯著之不同。在特定之日齡上,剌公鯷之體長皆大於異葉公鯷。兩 魚種在不同年間亦有些微差異,但不若種間之效應明顯。因此,技術性地以單一系群處理秋 季�等J魚資源,尚有可議之處。 |
英文摘要 | The commercial larval anchovy fishery in the l-lan Bay is mainly composed of two cogeneric anchovy species, Encrasicholina puntifer and Encrasicholina heteroloba, during autumn. A single technical "stock" has been proposed applying to the larval anchovy resource for the simplicity of management purpose. In this study, the sagitta growth and the growth curves are estimated separately, and the rates of specific and absolute growth are egaluated accordingly. The comparison of E. puntifer with E. heteroloba indicates that there are differences on the sagitta growth, specific and absoulute growth of standard length at age. E. puntifer are significantly larger at comparable ages. There is a slight interannual difference, though the effect is not as significant as the specific effect. It is premature yet to conclude that a single technical"stock" management on the autumn anchovy resources might be reasonable. |
本系統中英文摘要資訊取自各篇刊載內容。