Growth pattern and lenght-weight relationship of Rhyacichthys aspro, in the Cisadea River, West Java, Indonesia

Abstract

During development, the organisms such as fish species generally increase in size (length, weight). Length-weight relationships or condition factor in R. aspro species were analyzed separately by sex and location. This study aims to determine the growth patterns and Length-weight relationships in the R. Aspro fish species that were captured in the Cisadea River, West Java, Indonesia. This research was conducted from June 2012 to February 2013. Fish sampling from the field was carried out for six months from June to November 2012. Sampling was carried out at the station that had been determined by Purposive Sampling which could represent the upstream, middle and downstream of the river. The parameters measured consisted of growth patterns and factors conditions for fish (Length-weight relationships). The data then analyzed using the Excell 2007 computer program and uses the FAO-ICLARM Stock Assessment Tool II (FISAT II) program. The results showed that the correlation coefficient (r) R. aspro showed a value of 0.90 for male fish and 0.78 for female fish. Based on different sexes, the fish growth pattern in all gender has a positive allomatic (b> 3). Based on location, the fish growth pattern has positive and negative alomatric patterns. There are differences in conditions both based on gender and location. The length-weight relationship R. aspro is allometric with condition factor values ranging from 0.16-2.05. As conclusion, the lenght-weight relationship of R. aspro is allometric with different condition factor. the The results of this study can be used as baseline data for the management of aquatic resources in these locations or other locations.