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題 名 | 臺灣省淡水紅樹林沼澤區網紋招潮蟹(Uca arcuata De Haan, 1835) 族群的調查 |
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作 者 | 史金燾; | 書刊名 | 師大生物學報 |
卷 期 | 25 1990.11[民79.11] |
頁 次 | 頁1-11 |
分類號 | 387.13 |
關鍵詞 | 招潮蟹族; 沼澤區; 紅樹林; 淡水; 網紋; 臺灣; |
語 文 | 中文(Chinese) |
中文摘要 | 臺灣省淡水紅樹林沼澤區網紋招潮蟹(Uca arcuata De Haan, 1835)是一優 勢種的蟹類,分佈於區內潮濕而排水良好之空曠處。其生殖期始於四月中、下旬,於五月間釋出幼虫,八月底起在其棲地即可見小型網紋招湖蟹(背甲寬為0.5~ 0.8 公分),並在族群中佔半數以上,次年四、五月間已長成中型蟹(背甲寬為1.0~2.0公分),體呈灰藍色並有花紋,至次年成熱而進行繁殖。在設定樣區內經三年之連續調查其全年平均的密度因棲地的不同,為24.9 ± 8.7隻/m2至38.8±13.5隻/m2,本報告對影響網紋招潮蟹全年中族群變化的因素有所討論。 |
英文摘要 | The fiddler crab, Uca arcuata (De Haan, 1835) is a dominant species on the Tan-shui mangrove swamp. Its habitat is found at most open area wherever is well drained muddy substratum. Female U. ar-cuata (carapace width of 2.0-2.5cm) was found egg-bearing in. mid April. Young crabs with carapace width of 0.5-0.8cm were found on sampling areas and other habitats in late August. At this time young crabs con-tributed more than 50 % of U. arcuata population. Young crabs became medium size crabs with gray-purple carapace (1.0 - 2.0cm) in April to May of next year. The annual estimated densities of U. arcuata at two sampling sites after at least one year of survey, were 24 ± 8.7 crabs/ m2 to 38.3 ± 3.5 crabs/ m2. Factor(s) which may affect the accuracy of the estimation of densities of U. arcuata is discussed. |
本系統中英文摘要資訊取自各篇刊載內容。