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題 名 | Sex ratio changes of the oyster drill, Thais clavigera Kuster in Taiwan=臺灣產蚵岩螺 (Thais clavigera Kuster) 性比的改變 |
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作 者 | 劉莉蓮; 陳昭倫; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 19:2 1992.06[民81.06] |
頁 次 | 頁85-88 |
分類號 | 386.794 |
關鍵詞 | 改變; 性比; 蚵岩螺; 臺灣; |
語 文 | 英文(English) |
中文摘要 | 民國七十九年九月間,自香山及鹿港採得蚵岩螺(Thais clavigera)樣品一 批,將該樣品與民國五十五年及六十七同地區所調查的資料比較後發現,這兩次樣品中雄性 及雌性的性比有顯著的差異。雄雌性比由0.54~0.95變為1.60~2.55。雌性蚵岩螺的減少可 能會造成該族?或整個種的滅亡。因此,目前正在進行臺灣各地區蚵岩螺性比的研究,以期 瞭解本地區蚵岩螺族?性比的改變是區域性或是全面性的現象。 |
英文摘要 | Oyster drills, Thais clavigera Kuster, were collected at Shunsun and Lukang, Taiwan in September 1990. In comparing the current sex ratio to previous studies at the same locations, a significant change has occurred in the last two decades. At Shunsun and Lukang, the ratio of males to females increased from 0.54-0.95 in 1966 and 1978 to 1.60-2.55 in 1990. The decrease of female oyster drills in the population may eventually lead to population or species extinction. Currently, island wide surveys of oyster drill populations are being undertaken to determine whether the change in sex ratio is a local or a widespread phenomenon in Taiwan. |
本系統中英文摘要資訊取自各篇刊載內容。