PENGARUH PERBEDAAN SALINITAS TERHADAP PERTUMBUHAN KEPITING BAKAU, SCYLLA SERRATA
ABSTRACT: The aims of the
research were to find out firstly, the growth rate of the mud crab Scylla
Serrata) reared under different salinity levels and secondly, the range of the
salinity where the mud crab optimally grows.
The experiment was conducted at the Laboratory of Aquaculture
Technology, FPIK, UNSRAT, from April to May 2017. The experiment was set up according to the
Randomized Block Design, with 3 treatments, which were 3 different salinity
levels, 10 ppt, 20 ppt and 30 ppt. The
tested level of salinity was determined based on the preliminary
experiment. Each treatment was
triplicated, and each replicate represents the group of the initial weight of
the tested crab, which was 80-89 grams (group-1), 70-79 grams (group-2), and
60-69 grams (group-3). The tested mud
crabs were collected from the estuarine waters of Inobonto river, which has
salinity level of 12 ppt. The tested
crabs were weighed at the beginning and at the end of the experiment, and at
the interval of 7 days during the experiment period. The weight of the tested crabs data were
converted into Absolute Growth Rate (AGR) and Daily Growth Rate (DGR), which in
turn were statistically analyzed using Anova for Randomized Block Design, and
then Least Significant Difference Test.
The results of the Least Significant Difference Test show that the
absolute and daily growth rate of the tested crabs in the salinity of 10 ppt
are not significantly different with those in the salinity of 20 ppt. While the lowest absolute and daily growth
rate of the tested crabs were in the salinity of 30 ppt and are significantly
different with those in the salinity of 10 and 20 ppt. Hence, in order to get a maximal production,
the mud crab, Scylla serrata, should be cultured in the waters with a range of
salinity between 10 and 20 ppt.
Keywords: Mud crab, salinity,
growth
Penulis: Rifan D. Sitaba,
Indra R.N. Salindeho, Diane J. Kusen
Kode Jurnal: jpperikanandd170385
