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題 名 | Sex-Variant Morphometrics of the Swimming Crab, Portunus Sanguinolentus (Herbst), from the Waters off Northern Taiwan=臺灣北部海域產紅星梭子蟹之性別差異形態形質測定 |
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作 者 | 許建宗; 張小娟; 劉錫江; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 27:3 2000.09[民89.09] |
頁 次 | 頁175-185 |
分類號 | 387.13 |
關鍵詞 | 紅星梭子蟹; 概似比測驗; 形態形質; 體型與體重關係式; Likelihood ratio test; Morphometric relationship; Portunus sanguinolentus; Sizeweight relationship; |
語 文 | 英文(English) |
中文摘要 | 紅星梭子蟹是臺灣最重要具商業性價值之多產蟹類之一,但由於一些基礎生物學資料的闕如,系群資源狀態評估有所困難。因此,為探討體型結構,體型(甲殼寬,CW:公釐)和體重(BW:公克)間關係式,以及性別間的形態差異,自1997年4月至1998年7月在北臺灣海域蒐集了1880隻紅星梭子蟹為標本,進行形態測量研究,分別以雙對數或線性式來分析推導體重、附肢重、甲殼長、螫長及第五腹節寬對甲殼寬的關係式。並以概似比測驗法比較這些關係式在性別間的異同,結果顯示這些關係式在性別間有顯著的統計差異,對於臺灣北部海域產紅星梭子蟹,可用於系群評估所必須的體型-體重關係式可以表示為-雄蟹:BW=1.4880 ×10-5 CW3.2903;雌蟹:BW=1.4880 ×10-5 CW3.1227。 |
英文摘要 | The swimming crab, Portunus sanguinolentus, is one of the most commercially important and productive crustaceans fished in Taiwan. However, evaluation of the stock status is difficult due to the lack of knowledge of some fundamental biological parameters. Thus, to investigate the size structure, size (carapace width, CW in mm) --weight (body weight, BW in g) relationship and their differences between sexes of this species, a total of 1880 individuals were collected off northern Taiwan between April 1997 and July 1998. The relationships of body weight, weight of appendages, carapace length, chela length and width of the 5th abdominal segment against Cw were derived either in in-in relations (power function) or linear relations. Those relationships between sexes were compared by likelihood ratio tests. The results of all those comparisons showed significant differences between sexes. Hence, size-weight equations were derived as BW=1.4880 ×10-5 CW3.2903 for males and BW=3.3056 ×10-5 CW3.1227 for females, respectively. |
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