International Journal of Marine Science 2015, Vol.5, No.20, 1-16
11
gadangan
) in which the fishing operations are carried
out by a two-boat system and one-day trip system.
The boats typically travel to the fishing ground at
approximately 1300 and return to the port at dawn the
following day at 400. The first boat is called the
‘purse seine boat’ and the second is a support boat
called the ‘encircle’. In Pengambengan, the first boat
has an average size of 9.18 m long, 4.71 m wide and a
depth of 1.65 m with a 69.1 HP engine. The second
boat is an average of 20.3 m long, 5.17 wide and 1.81
m in depth with a 115.9 HP engine an as a couple of
boats (Figure 10).
Figure 10 Purse seine boats in Pengambengan
The purse seine nets in Pengambengan are between
190 and 500 m long and between 60 and 75 m deep.
The typical net has a mesh size of 0.75 to 1 inch
shaped into a bag (bunt)
1
. A single-unit purse seine
boat (2 boats) required 39 to 42 fishing crew members
(Figure 11).
The popularization of purse seine nets in Bali Strait
since 1974 not only increased the number of boat
ownerships but also further increased the use of the
purse seine. There are two fishing techniques using
the purse seine net in Pengambengan, namely ’active’
(local name:
gadangan
) and ‘passive’ (local name:
tangkauan
). The first technique involves fishing boats
that actively look for schools of fish while the second
technique (passive) is fishing using light tools (torch)
to attract or aggregate fish. In the second technique,
4-6 lights bulbs are required for a small boat. The net
is deployed near the water surface while the boat waits
for the fish to approach and congregate. The net is
then dropped down to trap the schools of fish, and the
loop string is pulled until the net opening is closed by
the fishermen (Figure 12).
1
Purse seine nets constructed of nylon multifilament PA. The
wing nets use yarn number PA 210 D/6 and 210/D9, the net
body uses thread and 210/D12 210/D9 PA numbered, the part
numbered bag uses yarn 210/D12 PA, 210/D14 and 210/D15.
Figure 11 The structure of a purse seine net operated in Pengambengan
