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(a) chub/blue mackerel (Scomber japonicus and Sc. australasicus), (b) anchovy (Engraulis japonicus), (c) sardine (Sardinops melanostictus), (d) saury (Cololabis saira), (e) pooling (sum data of all five target fish, chub/blue mackerel, sardine, anchovy, saury and jack mackerel), (f) pooling-4 (sum data of (a) to (d)). 0 = absence, 1 = presence.
