Analysis of food habits and length-weight relationships (LWRs) of java barb (Barbonymus gonionotus Bleeker) in Reubee River, Pidie, Aceh

The purpose of this study was to examine the food habits and length-weight relationship of java barb (BarbonymusgonionotusBleeker) in Reubeeriver, Pidie. This study was conducted in August - September 2017. Ten samples fish were collected using purposive sampling method from the fishermen's landing sites along Reubeeriver. The digestive tract investigation showed that as many as 8 from 10 total fish sample were filled by food. Then, the food wasexamined and resulted in 6 types: moss liver (Antheceroptopsida sp.), bamboo roots pentung (Dendrocalamusasper), bilis fish (Mystacoleucus sp.), fig leaf (Ficusracemosa), jerbung shrimp (Penaeusmerguiensis), and worms (Lumbricusrubellus). The highest percentage of occurrence frequency and index of propenderence found on Moss respectively 100% and 57%, while the highest percentage of volumetric value obtained on shrimp (35%). The analysis of food habits indicated that Java barb (Barbonymusgonionotus) in Reubee River is a group of omnivores that tend to be herbivorous fish with a ratio of 3:1 gut length. The result of calculation of lenght-weight relationship on 50 fish samples depicted an average of 127.42 mm with an average weight of 56.46 grams. While the result of growth pattern calculation was allometrik negative with b value equal to 0.938 which means long growth was faster than weight fish body. The condition factor gave a normal pattern with a value of 107.16.