Activity of Fish Samples Surveyed Aboard Ship
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one
*Hanato TSURUGA
syen longline stations as indicated on the track
a
re used. The longlines, cach consisting of a
ginline with 22 m droppers to which 4 hooks
tached, were used at these fishing stations.
Mrong the cruise, a total of 34 yellowfins, 10 bigeyes,
mbacores, 2 skipjacks and 1 marlin were caught.
dioactivity was measured with a scintillation
meter. The measurements were made by keeping
éctor about 10 cm from both sides of the fish
ount on deck was subtracted from the readings
survey meter. The mean values found, by fish
» are shown in Table l.
rvey meter, significant activity on the fish
Beeemeeuett by longline was not observed.
onal Fisheries Research Laboratory