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研究短報:螺類殼口長與螺重及殼高之相關性

Notes on the Relationship between Aperture Length and Weight of Freshwater Snails

摘要


一般螺類研究中,多半採用殼長或體重作為測量形質來估算螺類個體之大小。但是在研究某些螺種時,特別是淡水螺如網蜷等,常因螺塔尖端磨損造成殼長或螺重測量之誤差。本篇研究發現螺的殼口長與殼長,以及殼口長與螺體重之間均具有顯著相關,為測量螺的形質提供另一選擇。

關鍵字

淡水螺類 殼口長 體重 殼長

並列摘要


Most of the time, both the weights and the lengths of shells are used to estimate the sizes of freshwater snails. However, the estimation would be mistaken on some shells such as Thiara tuberculata, whose shell tips are usually damaged during the growth. In this note we found in snails there are significantly relationships between aperture lengths and both shell lengths and weights, respectively. These results give us alternative characters to estimate the sizes of snails.

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