Abstract
The feeding habits of the amber-fish, Seriola quinqueradiata, were analysed basing on the feeding experiments and the results were stuided comparatively with those of the mackerel, Pneumatophorus japonicus.
(1) The amber-fish showed a diurnal rhythm in the feeding activity, taking food (the living saurel) quite actively in the early morning and also in the evening, and no food at mid-night (Table 1).
(2) When the amber-fish were reared together with the mackerel in the same pool, there always revealed an order of feeding, showing a superior behavior of the amber-fish against the mackerel (Tables 2 and 3).
(3) The prominent difference in growth rate between the amber-fish and the mackerel was discussed from the experimentally obtained relation between the feeding and the growth, and the rapid growth was attributed mainly to the better anaboilc rate and the less maintenance ration of the amber-fish than the mackerel.
