STUDI POPULASI IKAN BETUTU (Oxyeleotris marmorata, Blkr.) DALAM UPAYA PENGENDALIAN DI WADUK PANGLIMA BESAR SOEDIRMAN, BANJARNEGARA
Abstract: As one of the
introduction species, Betutu Fish has an important role to the controlling
effort at P.B Soedirman Reservoir. Generally, the population index of the
indigenous fresh water species has decreased. It is caused by the existence of
the introduction fish that threat the indigenous fish species, so the
population becomes homogeneous. This research is aiming to find out about two
things, which is: a) the abundance, sex ratio, size dispersion, weight and
length of the Betutu Fish in P.B Soedirman Reservoir; and also b) the influence
of environmental factors on the abundance of Betutu Fish in P.B. Soedirman
Reservoir, Banjarnegara. This research is using the survey method with
purposive random sampling, in 9 location which has been done twice on June and
July 2013. The population of parameter has been analyze by quantative method,
while the correlation of water quality against to the abundance used the
Spearman Rank correlation analysis method. The research result showed that the
density was 57 fishes/307,5 m2; the sex ratio was 1:0,08 with 91,3% male and
8,7% female percentage; the size dispersion was even in every sample areas; and
the value of b is obtained for the weight and length connection, which is close
to isometric value (b=3). For the whole water quality aspect, whether physic or
chemistry that has been measured during the research in the reservoir was still
in normal range. It is supported by the Spearman Rank analysis that concerns
about the correlation of physic and water chemistry to the density; and it
turned out to be that both of the element have correlation even though not too
significant.
Penulis: Adhitya Moersid
Kode Jurnal: jpbiologidd140195
