Description of four types of feeding by shoaling fish and the protein values of some fish foods.

Abstract

From 16 per cent of the body weight for plant feeders to 2.1 per cent, for active fish eating types. Food per meal for line caught fish is estimated at double the average quantity found in those stomachs with food in them, based on troll caught southern blue-fin tuna. This species of 4.5 kg. average size .was found to increase by 13 gm. per day for a food consumption of thirteen times the amount; small horse-mackerel may compete with sardines on the New South Wales coast But at a size over 120 mm. in length they eat almost exclusively Nyctiphanes australis.