Problem Formulation Studies On Fish BehaviourIn Relation Net Transparency of Millennium Gillnet Operation In Bondet Waters, Cirebon
water. They further inferred that the visibility of nets depends on both the water colour and the colour of the seabed. Cui et al. 1991 used the light intensity
thresholds as an indicator of the fishing power of different coloured nets by comparing mackerel Scomber scrombus behaviour towards different coloured
twine. Considerable differences in colour selection thresholds observed for both a thin monofile thread and a thicker multifilament thread.
As new adopted gear, analysing a factor affecting the effectiveness on catch, in this case the net transparency is considered necessary. In order to analyse the
net transparency; in relation of fish as catch target, some approaches should be conducted. The study of behaviour often becomes the best way on analysing these
problems e.g. Wardle et al. 1991, Cui et al. 1991. Knowledge of fish behaviour, in relation to captures, can be acquired in different ways. Laboratory studies
informs that the fish behaviour patterns towards the gear or representations of gear-related stimuli can be described, and general behaviour relevant to the fish
capture process such as the swimming capacities of different species, can be studied Ferno and Olsen, 1994.
Meanwhile, as first step to understand the catch performance of millennium gillnet, the study of capture process is needed. This become necessary since the
information regarding this gillnet, which it was used from the first time until recent years is still limited. The capture process of gillnet can be determine
according to the ways of fish being retained in the net. The fish can be captured by being gilled, wedged, snagged and entangled Hovgard and Lassen, 2000.
For that reason, some studies are needed to understand the effect of transparency on fish behaviour towards net panel. Not just the effect of
transparency, some studies are also needed to obtain some information regarding the capture process of millennium gillnet as the way to understand the catch
performance of this net.
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