ニュ-ジ-ランド周辺海域におけるホキの摂餌生態〔英文〕

概要

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In order to elucidate the feeding habit of the species, the condition of stomach, kinds and condition of the stomach contents were examined. Hoki are omnivores, and the range of the food contents is wide, including prochordates, crustacea, molluscs and mesopelagic fishes. In these stomach contents, myctophids and small shrimps are the most abundant ones. Although scales and mud appear in the stomach frequently, it is assumed that scales are the remnants of myctophids, and mud is swallowed into stomach when small shrimps are eaten. Change of feeding habit with growth is observed, and is considered to be connected with the finding that the larger fish inhabit in deeper areas. The diurnal feeding periodicity is not clear. This may be partly due to the fact that the time of the sampling is concentrated in 0600-1400 of the day. The feeding activity is found to be the hghest in autrmn. This may be a pattern of feeding behavior before the coming spawning season in winter.
日本水産學會の論文