Biologi reproduksi ikan juaro (Pangasius polyuranodon) di daerah aliran Sungai Musi Sumatra Selatan

Abstract

Study on biology reproduction was expected to give basic information for management, such as for aquaculture, capture fisheriesand conservation of P. polyuranodon in Musi river. Sampling were conducted on June 2006, August 2006, January 2007, and July 2007in Musi river by using gillnet. Data analysis included length-weight relationship, sex ratio, condition factor, gonad maturity stage,Gonadosomatic Index (GSI), fecundity, and spawning type. Total number of collected P. polyuranodon was 51, consisted of 23 maleand 28 female. Total length of fish was ranged in 85–511 mm. Length-weight relationship of male and female was W = 0.00002L2.8062and W = 0.0002L2.8215 respectively. The result from t-test analysis showed that both of sexes have allometric negative growth. Sex ratiothoroughly was balance (1:1). Mean of factor condition relatively increased by the increasing of gonad maturity stage. At that timeP. polyuranodon was entering spawning time. June and August was predicted as the spawning time of this species. Gonadosomaticindex of female was much higher than the male. Fecundity of female was ranged between 616 and 7,059. Based on distribution of eggdiameter, this species was total spawner.Key words: juaro fish, IKG, spawning pattern, TKG.

Keywords

• IKG
• spawning pattern
• Juaro fish
• Spawning pattern
• TKG