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研究生:洪明仕
研究生(外文):Hung Ming-Shih
論文名稱:南澳溪直額絨螯蟹族群動態及生物學之研究
論文名稱(外文):Population Dynamics and Biology of the Mitten Crab Eriocheir rectus in Nanao Stream
指導教授:游祥平
指導教授(外文):Yu Hsiang-Ping
學位類別:碩士
校院名稱:國立海洋大學
系所名稱:漁業學系
學門:農業科學學門
學類:漁業學類
論文種類:學術論文
論文出版年:1993
畢業學年度:81
語文別:中文
論文頁數:67
中文關鍵詞:直額絨螯蟹族群動態生物學南澳相對成長保育
外文關鍵詞:Eriocheir rectusPopulation dynamicsBiologyNan Ao
相關次數:
  • 被引用被引用:8
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直額絨螯蟹( Eriocheir rectus )俗稱青毛蟹,目前僅分布於臺灣東部
,且為有待重新定名的新種,其春夏之際降海生殖洄游的習性,與同屬的
其他種類在秋冬之交大異其趣。本種蟹棲息於臺灣東部大小河川中,尤以
宜蘭縣南澳溪所產最富盛名,具有高經濟性及學術研究價值。 1991 年
9 月至 1992 年 9 月以南澳溪中游、下游及河口為採集區放籠定點採集
標本,並量測生態因子。結果顯示其生殖降海期主要在春季,產卵期、親
蟹自然死亡期及大眼幼體上溯期則在夏季。影響族群分布的主要因子為月
降雨量、水溫及河底質礫石大小。族群中大部份的個體壽命為 2 歲,少
數為 1 歲和 3 歲。 相對成長推估出雄性及雌性的最小性成熟甲寬分別
為 45 mm 及 35 mm 。產卵數平均為為 174,400 粒。檢驗 750 隻標本均
無發現肺吸蟲寄生。另外,保育方面的建議亦有所述及。
The green mitten crab, Eriocheir rectus, is only
distributed in Taiwan and a new name will probably be used .
It mainly inhabits the rivers and streams of eastern
Taiwan but is most popular from the Nanao Stream. The
sea-ward reproductive migration is in the autum-winter
period for the other Eriocheir species but it is between
spring and summer for E. rectus. It has high commercial
value and is also an important subject for academic studies.
From september 1991 to september 1992, the materials were
caugth at three sampling sites (midstream, downstream and
estuary) and some ecological factors were also measured. The
results appeared the sea-ward migration in spring was the
reproductive period of this crab. Furthermore, summer was
the spawnig, natual dead and megalopa up-stream migration
periods. The monthly rain fall, water temperature and grain
size of the substratum on the river bottom were the three
most important environmental factors affecting the
distribution of the crab in the stream. The life cycle of
this crab population were mainly composed of 2 years. Only a
few of them belonged to the 1 year or 3 years. Relative
growth estimates the size of first maturity for males and
females to be 45mm and 35mm respectively. Females have an
average of 174,400 eggs. Of the 750 specimens examined, no
Paragonimus parasites were found at all. At last, the
suggestions about its conservation were also described.
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