Department of Biology, Caraga State University, Philippines
Sheena M. Tagarao, currently working at Department of Biology, Caraga State University, Philippines. The number of articles published are 13 and the number of times cited by, are 43 and the number reads include are 106. The area of interest in the research was Biochemistry, Biotechnology and Marine Science.
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»