農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

本研究旨在探討台灣西南海域裴氏金線魚之食性，而分析用之材料係於1998年1月至12月間，採集自屏東縣東港地區小型拖網船所漁獲之裴氏金線魚標本，共計採得標本1,052尾。裴氏金線魚屬雜食性之魚類，而以底、中、表層之甲殼類及魚類為最主要的捕食對象。在週年之餌料生物組成中，以甲殼類之數量百分比佔最高，達52.8%，計有3科4種，其次為魚類 (43.1%)，計有9科13種。主要餌料生物包含有蝦類 (22.9%)、小鰭鎌齒魚 (19.9%)、蟹類 (18.4%)、正櫻蝦 (10.0%)；而餌料生物有明顯的季節性變動差異。亦即在春冬季之餌料生物中均以甲殼類之出現率(90.7%、 76.1%)最高，但在春季則以軟體動物類 (51.8%) 為其次，而冬季為魚類 (25.0%)，在夏秋季則均以魚類之出現率 (56.7%、73.7%) 佔最高，其次均為甲殼類 (49.5%、59.2%)。在重量百分比方面，春夏季均以甲殼類 (65.5%、78.1%)為最高，其次均為魚類 (26.5%、15.3%)，反之，秋冬季則均以魚類 (60.5%、52.1%) 佔最高，其次為甲殼類 (38.9%、40.8%)。裴氏金線魚無論在任何體長，其雌雄魚間的食性差異並不明顯。

This study was to investigate the feeding habits of the Notchedfin threadfin bream (N(emipterus peronii() by analyzing the stomach contents of 1029 specimens, which were caught from southwestern Taiwan by trawlers from January to December, 1998. The diet composition indicated that N. peronii was a polyphagous fish. Crustaceans and teleost were the dominant preys of N. peronii, which occupied 52.8% (including 3 families and 4 species) and 43.1% (including 9 families and 13 species) of the total food items, respectively. The top 4 food items were shrimp (22.6%), Harpadon microchir (19.9%), Crab (18.4%) and Sergia lucens (10.0%). Seasonal variation in diet composition was significant. In spring and winter seasons, the highest of occurrence frequency was crustacean with 90.7% and 76.1%; and the secondary was mollusca with 51.8% in spring and fish with 25.0% in winter. However, the highest frequency in summer and autumn was fish with 56.7% and 73.7%, then crustacean with 49.5% and 59.3%. In addition, the highest weight percentage in spring and summer was crustacean (65.5% and 78.1%), and secondary was fish (26.5% and 15.3%). On contrary, the highest in autumn and winter was fish (60.5% and 52.1%), then crustacean (38.9% and 40.8%). However, there was no significant different between female and male’s feeding habits whether having different sizes.