NOTES ON THE BIOLOGY OF A POORLY KNOWN GRAPSID CRAB CLISTOCOELOMA SINENSIS SHEN, 1933 (DECAPODA: BRACHYURA) FROM TAIWAN

臺灣產中華泥毛蟹生物學之初探

薛攀文(PAN WEN HSUEH)

《Collection and Research》 5期 (1995/06) Pp. 143-146

https://doi.org/10.6693/CAR.1995.5.7

摘要

A population of a poorly known grapsid crab Clistocoeloma sinensis was found at a coastal salt marsh near the mount of TaChia River in west central Taiwan. Forty-one individuals was collected over an 18-month study period. Body sizes of these crabs ranged from 2 to 17mm carapace width (CW). The largest male and female specimens collected in this study were 17 and 15mm CW, respectively. Male: female ratio of this population was 26:15. Gonadally ripe and egg-carrying females found in May, June and September evidences an early summer to early fall brooding period. Crabs sized 2mm CW were only found during December 1993 to March 1994, indicating possibly a late winter to early spring recruiting period. The population of C. sinensis at the sampling sites can seemingly be separated into 3 year classes. Population structure analysis suggests that C. sinensis may have a life span of 1 1/2 to 2 years.

關鍵字

Clistocoeloma sinensis ； population dynamics ； life history

並列摘要

在臺灣西海岸大甲溪河口區附近分布著中華泥毛蟹族群。在十八個月的調查期間，一共採得四十一隻螃蟹，其個體大小(甲殼寬)範圍從2到17公釐，而雄與雌蟹的最大個體分別爲17及16公釐。這個族群的雄蟹與雌蟹比例爲26:15。由五、六及九月各採得生殖腺發育成熟與抱卵的雌蟹推測中華泥毛蟹的抱卵期可能在初夏至初秋之間。同時由稚蟹(2公釐甲寬)的採得時間侷限在1993年12月與1994年1－3月也可推測稚蟹回歸期大致在冬末春初時期。而族群結構分析顯示，在樣區內的中華泥毛蟹族群可能是由分別代表三個年期的一些個體組成，這些個體的生長年限估計約在一年半至兩年間。

並列關鍵字

中華泥毛蟹 ； 族群生態與生活史