STRIPED CATFISH (Pangasianodon hypophthalmus) (SAUVAGE, 1878) MOVEMENT AND GROWTH IN GAJAH MUNGKUR RESERVOIR, CENTRAL JAVA
Abstract: Movement is an
essential mechanism by which mobile animals acquire the resources necessary for
the successful completion of their life-cycles. Striped catfish (Pangasianodon
hypophthalmus) contributed about 384 tonnes or approximately 40,04% to the
total fish production in Gajah Mungkur reservoir. Diversion of Keduang River,
one of Gajah Mungkur important inlets, could affect the the movement of this
fish. The objective of this research were to analyze data related to the
movement patterns and growth of Pangasianodon hypophthalmus. Field works were
conducted from March to December 2011 by tagging experiment of large fish with
the PDS-Tags and the T Bar-Tags for the small ones. Fish samples used for the
experiment were collected from fisherment catch in Gajah Mungkur reservoir. The
tag numbers, the release time, and the fish size were noted before releasing
the tagged fish were released. Fishermen who caught the tagged fish were
advised to report the fish tag number, time of catching, and fish size. The
results showed that the Pangasianodon hypophthalmus could moved as far as 200 m
to 15 km in 3- 176 days. In the rainy season most of the catfish moved far into
the inlet wiroko and Keduang, and some to the inlet Wuryantoro. Pangasianodon
hypophthalmusin Gajah Mungkur Reservoir had growth equation of Lt= 99(1-e
0.762(t-0.15)), with the growth coeficient (K)= 0.762/year, t0=0.15 year,
infinity length (L”)= 99 cm. Water diversion of Keduang river, one of Gajah
Mungkur inlets, did not fully dried the River during dry season and affected
striped catfish movement and growth.
Keywords: Movement pattern;
growth; striped fish; Pangasianodon hypophthalmus; reservoir
Author: Siti Nurul Aida, Agus
Djoko Utomo
Journal Code: jpperikanangg150020
