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題名 | Ecological Studies on Commercially Important Prawns from the Coastal Waters of Southwest Taiwan(3):Emigration of Metapenaeus ensis from Dapong Bay=臺灣西南沿岸海域重要經濟蝦類之生態學研究(3):大鵬灣砂蝦之向海洄游 |
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作者 | 蘇茂森; 廖一久; | 書刊名 | 臺灣水產學會刊 |
卷期 | 21:2 1994.06[民83.06] |
頁次 | 頁183-195 |
分類號 | 387.13 |
關鍵詞 | 砂蝦; 向海洄游; 大鵬灣; Metapenaeus ensis; Emigration; Dapong bay; |
語文 | 英文(English) |
中文摘要 | 本報告旨在探討大鵬灣產砂蝦之向海洄游生態。向海洄游期為6-12月,產期為8月與12月。洄游之高峰大多於新月時出現。洄游雌蝦之頭胸甲長為10.0~30.0mm,雄蝦者為10.0~29.0mm。較小型的蝦主要於6~10月間游出,而較大型者則於11~12月間外游。外游蝦係由數個齡級群構成。在各季節,雌雄蝦間之肥滿度比較,均有顯著差異。而不論雌雄蝦,在各季節間之肥滿度亦幾乎均有顯著差異。外游雌蝦均尚未達到成熟,但雄蝦在頭胸甲長達21.2mm以上者,則50%以上帶有精莢。 |
英文摘要 | The emigration of Metapenaeus ensis from Dapong Bay in southwest Taiwan was investigated based on the data collected from June 1984 to December 1987. The emigration occurred from June to December with peaks around August and December. The prawns preferred to emigrate during the new moon phase. The size of emigrating prawns ranged from 10.0 to 33.0 mm in carapace length (CL) for females and 10.0 to 29.0 mm in CL for males. The smaller prawns emigrated mainly form June to October and the larger prawns emigrated mainly from November to December. The emigrants were composed of several cohorts. Significant difference in fatness between sexes was found for each season. There was also significant difference in fatness for most pairs between seasons for both sexes. No maturing females were found. The percentage of males with spermatophores was about 50% at a CL of 21.2mm. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。