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題名 | Age and Growth of the Bombay-duck (Harpadon microchir) in the Waters off Southwestern Taiwan=臺灣西南海域小鰭鐮齒魚之年齡成長研究 |
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作者 | 廖翊雅; 林玉婷; | 書刊名 | 臺灣水產學會刊 |
卷期 | 37:2 2010.06[民99.06] |
頁次 | 頁121-134 |
分類號 | 387.103 |
關鍵詞 | 年齡成長; 小鰭鐮齒魚; 耳石; 臺灣西南海域; Age and growth; Harpadon microchir; Otolith; Southwestern Taiwan waters; |
語文 | 英文(English) |
中文摘要 | 本研究以西南海域之小鰭鐮齒魚(Harpadon microchir)為研究對象,利用耳石來進行年齡成長之判定。採樣時間為2007年9月至2008年9月,總計共採得799尾樣本魚,其中年齡判讀之耳石樣本數有513個,尾叉長範圍為53~509mm FL。取對數後尾叉長(FL)與體重(BW)之迴歸關係經共變異分析(ANCOVA)檢定結果顯示雌、雄間並無顯著差異(p>0.05),故將雌雄魚體長體重之資料合併為:BW=2×10^(-7)FL^3.5259(n=513, r^2=0.98)。尾叉長與耳石半徑(OR)的迴歸關係,雌雄魚分別表示如下:雌魚為FL=246.09 OR-75.056(n=236, r^2=0.88);雄魚為FL=210.69 OR-36.373(n=168, r^2=0.89)。本研究發現,小鰭鐮齒魚耳石輪紋並非日輪,目前將輪紋形成週期假設為7天形成一輪,以非線性迴歸分別估得雌雄魚之von Bertalanffy成長參數並利用最大概似比率法檢定顯示,雌雄魚成長有顯著差異:雌魚L(下標 ∞)=789.4mm,k=0.111/yr,t(下標 o)=0.4267/yr;雄魚L(下標 ∞)=622.4mm,k=0.143/yr,t(下標 o)=0.390/yr。 |
英文摘要 | The bombay-duck, Harpadon microchir, is the by-catch species of trawl fishery in southwestern Taiwan waters but it has been regarded as noticed fish due to its increasing economic value in recent years. Age and growth of the bombay-duck was examined using specimens collected from the waters off southwestern Taiwan, from September 2007 to September 2008. Age was determined by sagittae otolith ring counting. No significant difference on the relationship between body weight (BW) and fork length (FL) between sexes was found, and the sexes combined BW-FL relationship was BW=2×10^(-7) FL^3.5259 (n=513, r^2=0.98). The relationship between fork length and centrum radius (R) was estimated as FL=246.09 R-75.056 (n=236, r^2=0.88, p<0.05) for females, and FL=210.69 R-36.373 (n=168, r^2=0.89, p<0.05) for males. An existing hypothesis of the ring marks suggested the ring forms once a week. The von Bertalanffy growth parameters are L(subscript ∞)=789.4 mm, k=0.111/yr, t(subscript o)=0.4267 yr for females; L(subscript ∞)=622.4 mm, k=0.143/yr, t(subscript o)=0.3901 yr for males. |
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