Journal of Aquaculture Research & Development

Department of Biology, Caraga State University, Philippines

Biography

Joycelyn C. Jumawan, Currently working as Associate Professor, Caraga State University, Biology Department, Ph.D. Biology Butuan, Philippines. The number of articles published are 27 and the number of times cited by, are 110 and the number of reads include are 18,960. The area of interest in the research was DNA Barcoding, PCR.

Publications

• Research Article   
  Length-Weight Relationship (LWR), Gonadosomatic Index (GSI) and Fecundity of Johnius borneensis (Bleeker, 1850) from Lower Agusan River basin, Butuan City, Philippines
  Author(s): Sheena M. Tagarao, Chennie L. Solania, Joycelyn C. Jumawan, Shirlamaine G. Masangcay and Laurence B. Calagui*
  
  Length-weight relationship (LWR) and Reproductive phenology of Johnius borneensis (Bleeker, 1850) collected from Lower Agusan River was studied from the months of May 2017 to January 2018. Throughout the sampling period, a total of 304 specimens with 185 female and 119 males were examined and analyzed. The overall sex ratio is 2:1 with female preponderance. LWR of females showed positive allometric growth (b>3; p=0.0000) while male specimens followed negative allometric (b<3; p=0.000). Ovarian GSI showed to peak in reproduction during September. Fecundity-length and fecundity-weight shows low correlation coefficient in their relationship. J. borneensis had a short reproductive period with this it is highly recommended that fishing be strictly restricted during its spawning season (September) for this fish species to propagate their populati.. View more»
  

  Abstract PDF