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頁籤選單縮合
題 名 | Age Structure of Spotted Mackerel, Scomber australasicus, in the Coastal Waters of Taiwan as Estimated From polymodal Length-Frequency Analysis=以多型量體長頻度解析法分析臺灣近海花腹鯖族群年齡結構 |
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作 者 | 谷瑞峰; 曾萬年; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 21:2 1994.06[民83.06] |
頁 次 | 頁121-137 |
分類號 | 439.23 |
關鍵詞 | 花腹鯖; 體長組成; Bhattacharya多型量頻度解析法; 年齡結構; 臺灣; Scomber australasicus; Length composition; Bhattacharya's polymodal frequency analysis; Age structure; Taiwan; |
語 文 | 英文(English) |
中文摘要 | 本文以Bhattecharya多型量解析法,配合年齡判讀結果所建立的Age-length key,分析漁獲物的體長組成,來推算1981~1983年臺灣近海產花腹鯖的年齡結構。臺灣近海花腹鯖的年齡組成隨季節及漁場而改變。臺灣東北部澎佳嶼~釣魚臺海域的花腹鯖,在漁獲盛期的秋冬季,以1+至3+歲魚為主,漁獲淡季的春夏期間,2+至4+歲魚較多。臺灣西南部東沙群仚附近海域產者,則以3+及4+歲魚為主(漁期僅於春季)。除高齡魚外,Bhattacharya多型量頻度解析法在年齡組成解析的應用上,具有相當的可靠性。 |
英文摘要 | The age structure of spotted mackerel, Somber australasicus Cuvier & Valenciennes, in the coastal waters of Taiwan in 1981~1983 was estimated from length frequency distribution using Bhattacharya's polymodal analysis. The age composition of spotted mackerel varied with area a season. In the waters off Pengchiahsu and Fishing Islands northeastern Taiwan, the mackerels were consisited of 1+ to 3+ year old fish during the poor good fishing seasons (autumn and winter), and 2+ and 4+ year old fish during the poor fishing seasons (spring and summer). In the waters off northern Pratas Islands southwestern Taiwan, the mackerels consisted of 2+ to 5+ year old fish in spring, but dominant with 3+ and 4+ year old fish. Except for the old fish, the mean length and proportion of mixture of age groups estimated both from polymodal length-frequency analysis as well as from scale reading was corresponding each other. Therefore, Bhattachzarya's polymodal analysis was considered to be a reliable method for estimating age composition of the spotted mackerel. |
本系統中英文摘要資訊取自各篇刊載內容。