Brief History of Millennium Gillnet
West Borneo and was operated to an industrial fishing. But in Cirebon, most of the millennium gillnet fishermen are the artisanal fishermen.
4.2 Fish Behaviour Study 4.2.1 Fish behaviour in relation to contrast colour net panel
From the result of the experiment, the largest frequency of fish entering the new white was on the conditioned behaviour 106 fish, while fish tend to enter
the old white panel on the voluntary behaviour 101 fish. On the other hand, the frequency of fish entering both panel old white and new white were higher than
the frequency of fish entering black panel. From the proportion of fish passing through net, the highest frequency of average was on the new white in voluntary
behaviour 0.577. Frequency of fish entered black panel less than the new and old white panel.
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Note: Significant among 3 net panels
Figure 14. Comparison among the fish passing through the net panel on voluntary behaviour
From Figure 14, the comparison of fish passing through the net panel on voluntary behaviour was significant to the other net panels. This probably was due
to the white nets, either old white or new white were less visible than the black net. The proportion of the frequency of passing derived from the frequency of
fish passing through each net panel divided into frequency of fish passed through
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control. The control was the frequency of fish passing through the panel without a net.
In voluntary behaviour, the fish was less active than the conditioned behaviour. This probably because of none of stimulus is used to stimulate the fish
of not avoiding to pass through the net panel. The use of forcing panel to minimize the swimming area of fish in area B was very helpful to makes the fish
swim more active.
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Figure 15. Comparison among the fish passing through the net panel on conditioned behaviour
From Figure 15 above, the comparison of fish passing through the net panel on conditioned behaviour was not significant. The fish becoming more active than
if it was in voluntary because of the use of forcing panel. This made the frequency of passing in each of net panel of conditioned behaviour increasing, especially in
both white nets old white and new white. The frequency of passing in both white nets i.e. the old white net and new white net was higher than the black net, with
the highest frequency was in old white net. It showed that the fish was actually avoiding the contrast colour.
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