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題名 | Some Aspects on the Fishery Biology of Big Eye Priacanthus Macrasanthus in the Tungkand Waters, Southwestern Taiwan=臺灣東港附近海域大眼鯛之漁業生物學研究 |
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作者 | 劉光明; 陳哲聰; 莊守正; |
期刊 | 臺灣水產學會刊 |
出版日期 | 19921200 |
卷期 | 19:4 1992.12[民81.12] |
頁次 | 頁251-262 |
分類號 | 387.104 |
語文 | eng |
關鍵詞 | 大眼鯛; 東港; 海域; 漁業生物學; 臺灣; 形態; 生殖; 年齡與成長; Morphology; Reproduction; Age and growth; Priacanthus macracanthus; |
中文摘要 | 本篇記述東港附近大眼睛(Pricanthus macracanthus)之漁業生物學特性和其與龜山島產大眼鯛比較之結果。計數形質均甚穩定且各計量形質與體長均有顯著的直線迴歸關係存在。生殖期為五月至九月,成熟雌魚之抱卵數為110,000至320,000(粒/尾)。最小性成熟體長為170 mm。年齡查定以鱗片為形質,輪紋一年形成兩輪,一次在十二月至一月間;另一次在六至七月間。雌、雄之成長不同,以von Bertalanffy方程式表示分別為: 雌 Lt=441.07 (1-e-0.136(t+2.90)), 雄 Lt=401.68 (1-e-0.128(t+2.632)). 經變積分析比較結果顯示,計數形質在兩海域間無明顯差異,但兩海域間計量形質和體長之關係有明顯差異,兩海域大眼鯛的成長有明顯差異,東港產者成長較快,可能為兩不同系?。 |
英文摘要 | This paper presents some aspects of the fishery biology of big eye, Priacanthus macracanthus, caught in Tungkang waters southwestern Taiwan during the period from November 1981 to November 1982. The results obtained are compared with that of Guei-Shan Island waters. The meristic characters are steady. The morphometric character shows a significant linear relation with fork length. Spawning season of the big eye is from May to September. Fecundity is from 110,000 eggs/fish to 320,000 eggs/fish. The size at first maturity is approximately 170 mm in fork length. The age of the fish was estimated by scale reading. Two resting zones were formed every year, one is from December to January and the other from June to July. There is a significant difference of growth between sexes. The von Bertalanffy growth equations are estimated as: Lt=444.07 (1-e-0.136(t+2.90)) for females, and Lt=401.68 (1-e-0.128(t+2.632))for males, respectively. There are no significant differences in meristic characters for big eye between Tungkang and Guei-Shan waters, while the regression of morphometric characters on fork length are different between these two waters. The adjusted mean of the regression line in Tungkang waters is larger than that in Guei-Shan Island waters. This indicated that the growth of this species in the two waters are significantly different, the fish in Tungkang waters grow faster than those in Guei-Shan Island waters. It is suggested that the big eye in the northeastern and the southwestern waters of Taiwan might be originated from two different stocks. |
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