Basic HTML Version
International Journal of Marine Science 2015, Vol.5, No.7, 1-4
http://ijms.biopublisher.ca
3
Figure 2 Fish species trapped by gillnet with 3.75 cm stretched
mesh size
Figure 3 Fish species trapped by gillnet with 6 cm stretched
mesh size
Figure 4 Fish species trapped by gillnet with 10 cm stretched
mesh size
Figure 5 Fish species trapped by green gillnet
Figure 6 Fish species trapped by blue gillnet
Figure 7 Fish species trapped by white gillnet
3 Discussion
Fish have different reaction to net against various
colors (Hamley, 1975). An investigation had been
done in aquarium and shown that when Cod encounter
to net, swim parallel to net and tend to go to the region
of net that not seen (Stewart, 1984). Narayanappa et.al,
(1977) reported that the highest catch of gillnets in
Burla water (India) was related to white net and then
yellow, gray, green and blue nets. According to
Steinberg (1985) the most effect catch of Baltic cod is
belonged to dark green net. In Beyúehir lake (Turkey)
most of fishermen usually used green nets and dark
green nets have high efficiency to catch carp pike fish
and then light green (Balık and Çubuk, 2001). In this
study analysis showed that green net had high
economic diversity index versus Simpson index. Thus
we concluded that green net has the best economic
efficiency and catch the more valuable species.
According to Figures 5, 6 and 7 net with green color
allocate highest catch composition. The appearance of
green net is less visible in aquarium rather than other
colors (Wardle et.al, 1991). It is important to know
that depth and trophy condition of region can affect
the net color efficiency; it’s because of shallow waters