Spots:澎湖水族館 引進新嬌客20080610
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澎湖水族館 引進新嬌客
(記者宋國正報導)澎湖水族館為因應今年觀光盛季,館內出現甚多平日難得一見的海洋生物,其中以和尚蟹、椰子蟹及幽靈蟹和成群結隊的鯡魚和鯖魚倍受矚目,吸引大批遊客圍觀。
圖鑑顯示,從外部形態來看,螃蟹與蝦子、龍蝦和寄居蟹都具有共同特徵有三,關節性附屬肢、外骨骼及十支腳,腹部扁平萎縮並反摺緊貼於頭胸部下方的是短尾類(螃蟹),有長圓筒形腹部的是長尾類(蝦子與龍蝦),腹部介於螃蟹與 蝦子之間並歪向身體一側的是歪尾類(寄居蟹類又稱異尾類)。世界目前記錄的螃蟹類將近一萬種,十之八九是海洋產種類,只有少數是陸地產的種類。
目前澎湖水族館展示的和尚蟹走路呈直線,而椰子蟹會爬樹、最有意思的是神龍見首不見尾的角眼沙蟹又稱幽靈蟹。
除了蟹類外,在海洋中有一些魚類經常是以成群的方式出現,並不是因為牠們喜歡熱鬧或是示威抗議,因為在一望無際的海洋中,很多魚類牠們的食物常常不均勻的分佈在海洋中,牠們以群體攝食的方式比較有利,有時則是方便在茫茫大海拔尋配偶,或者是進行長距離的遷徙,躲避敵人的攻擊等目地。因此,常可觀察到一些魚類有群集的現象,其中最常見的就是大洋中的一些中小型的魚類,如鯡魚及鯖魚等。
記者:宋國正報導 / 2008/06/10 10:00:00
資料來源:澎湖時報2008/06/10