Basic HTML Version
International Journal of Marine Science 2014, Vol.4, No.61, 1-13
http://ijms.biopublisher.ca
8
Table 4 Value of each environmental variable of the study area
and that of location inhabited by scallop. SD=standard deviation
Table 5 Kolmogorov-Smirnov test results in assessing the
differences between characteristics of the environmental
variables inhabited by scallop with the whole study area
ENFA model validation by using AUC method
showed values of 0.94 (~1), thus the ENFA model was
accurate and very good (Hirzel et al., 2006). Habitat
suitability map of ENFA results was presented in
Figure 5.
The result of spatial modeling and ENFA was habitat
suitability maps of scallop in Brebes District with
three suitability categories: suitable habitat, marginal
habitat and not-habitat. The suitable habitat for the
scallop was the seabed of the eastern study area
located relatively far ahead Pemali estuary (Figure 5),
while “marginal habitat” was around the “suitable
habitat”. Both of these habitat suitability categories
each of them covered an area of 5.8% and 11.5% of
the whole study area (Table 6).
3 Discussion
Scallop at the study area were not evenly distributed.
They only inhabited a specific location (Figure 5) with
certain range of environmental variables determining
its habitat (Table 4). Research conducted in more
extensive waters wider (from Semarang to Tegal), also
Figure 5 Habitat suitability map of
Amusium pleuronectes
in
Brebes resulted by spatial modeling and ENFA. Kabupaten
Brebes=Brebes District, Laut Jawa=Java Sea
Table 6 Habitat suitability category of scallop in Brebes District
by spatial modeling and ENFA
showed that the distribution of scallop in the waters
tended to be clumped, found only in certain locations
(Abdillah, 2000).
The application of some environmental variables in
determining the habitat of scallop was performed
because of the multidimensional characteristic shown
by the ecological niche of a species in nature (Begon
et al., 2006). ENFA results showed that the scallop
habitat at the study area preferred waters with higher
density of plankton, the deeper depth, lower
suspended solids materials, finer sediment (mud) and
a more distant from estuary than the average study