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

為了解小鰭鐮齒魚 (Harpadon microchir) 食性，本研究自2012年2月至2013年12月，每月至東港採集拖網船所漁獲之小鰭鐮齒魚標本，共獲得1,466尾樣本。各季節攝食對象重量百分比，春季主要攝食對象為正櫻蝦 (Sergia lucens) (27.3%) 與大鱗新燈魚 (Neoscopelus macrolepidotus) (38.3%)；夏季和秋季主要攝食物種皆為小鰭鐮齒魚 (Harpadon microchir) (26.9%、19.5%)及臺灣紅蝦 (Plesionika taiwanica) (28.5%、34.5%)，冬季為小鰭鐮齒魚 (27.7%) 及日本櫻蝦 (S. talismani) (16.5%)。各體長等級主要攝食對象，體長等級在 15 cm 以下者之攝食對象以正櫻蝦及大鱗新燈魚為主；體長 16 ~ 25 cm 者， 以大鱗新燈魚、正櫻蝦、小鰭鐮齒魚、臺灣紅蝦為主；26 ~ 40 cm 者，主要攝食種類則為小鰭鐮齒魚、臺灣紅蝦。其中以 36 ~ 40 cm 的個體，攝食小鰭鐮齒魚的比例達到最高，佔 55%。體型大於 40 cm 的個體，其餌料生物有海鰗鰍科的魚類犀鱈屬 (Bregmaceros spp.)、日本櫻蝦、臺灣紅蝦、天竺鯛科 (Apogonidae) 及日本鬚銀眼鯛魚 (Polymixia japonica)。各體長等級間攝食組成有顯著差異；換言之，小鰭鐮齒魚的攝食對象，會隨著不同成長階段而改變。

This study investigated the feeding habits of Bomay duck (Harpadon microchir) by examining their stomach contents. In total, 1,466 specimens were obtained by sampling catches from trawlers operating in the southwestern waters of Taiwan from February 2012 to December 2013. Based on the stomach contents of specimens, the study found that the main species were Sergestid shrimp (27.3%) and Neoscopelus macrolepidotus (38.3%) in the spring, H. microchir (26.9% and 19.5%) and Plesionika taiwanica (25.8% and 34.5%) in the summer and autumn, and S. talismani (16.5%) and H. microchir (27.7%) in winter. The Bomay ducks smaller than 15 cm mainly fed on S. lucens and N. macrolepidotus; those with a body size of 16 to 25 cm fed on N. macrolepidotus, S. lucens, H. microchir, and P. taiwanica; and those with a body size of 26 to 40 cm fed on H. microchir and P. taiwanica. H. microchir accounted for 55% of the total stomach contents in the specimens with a body size ranging from 36 to 40 cm. Specimens with a body size larger than 40 cm mainly fed on S. talismani, P. taiwanica, Polymixia japonica, Apogonidae, and Bregmacerotid spp.. The feeding habits varied significantly among the specimens of different sizes, suggesting that the feeding habits of Bomay ducks change at different developmental stages.