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題 名 | Estimates of Biological Parameters of Sword Prawn (Parapenaeopsis hardwickii) in the Adjacent Waters off Taichung Harbor=臺中港附近海域產劍蝦(Parapenaeopsis hardwickii)之生物學參數 |
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作 者 | 曾宗德; 葉顯椏; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 27:4 2000.12[民89.12] |
頁 次 | 頁241-251 |
分類號 | 387.13 |
關鍵詞 | 成長參數; 死亡係數; 加入型態; Parapenaeopsis hardwickii; Growth parameters; Mortality; Recruitment pattern; |
語 文 | 英文(English) |
中文摘要 | 利用1992年2至7月間,連續6個之之月別體長頻度資料及ELEFAN之方法,來估 計台中港附近海域產劍蝦(Parapenaeopsis hardwickii)之季節性成長參數、死亡率及加型態。本 研究中只使用雌蝦之體長頻度資料加以分析。應用體長頻度分佐擬合季節性本托蘭裴成長方 程式(von Bertalanffy growth equation),其結果如下:極限頭胸甲長L∞=39.0mm,成長參數 K=1.1(1/year),C=0.95 and WP=0.94。利用季節化體長轉換漁獲量曲線估計其全死亡係數Z為 6.37(1/year)。利用兩種經驗式,估計其平均之自然死亡係數M為2.07(1/year);漁獲死亡係數F 利字Z=F+M之關係求得為4.30(1/year)。開發率E為0.67 (F/Z),顯示本蝦種已有過度開發之情 形。加入型態分析結果顯示,劍蝦每年具有兩個強度不等之加入群。劍蝦之最大年齡 估計為 2.74年。 |
英文摘要 | Seasonal growth parameters, mortality rates and recruitment pattern of female sword prawn (Parapenaeopsis hardwickii) were estimated from a length-frequency data set with ELEFAN methods. The 6-month data set was collected from the adjacent waters off Taichung harbor between February and July 1992. Parameters of the von bertalanffy growth equation with seasonal fluctuations obtained were:L∞=39.0 mm carapace length, k=1.1 (1/year), C=0.95 and WP=0.94 of year. The total mortality coefficient Z was 6.37 (1/year) estimated by seasonalized length-converted catch curve procedure. The average natural mortality coefficient M of 2.07 (1/year) was obtained from the empirical methods of Pauly (1980) and Srinath (1991). The fishing mortality coefficient F was 4.30(1/year)(F=Z-M). The exploited rate E of 0.67 (F/Z) showed that the sword prawn population is over-exploited. The annual recrulitment pattern obtained by back-projecting these length frequency samples onto an arbitrary one-year axis showed that recruitments occur in two pulses of unequal strength. The longevity tmax of swork prawn is 2.74 years. |
本系統中英文摘要資訊取自各篇刊載內容。