Studies on LWR and Condition Factor of Two Populations of Labeo Gonius Found From River Indus; Sindh-Pakistan

  • Shehla Malik
  • Ayaz Hussain Qadri
  • Maryam Sheikh
  • M.Y. Laghari
  • P.K. Lashari
  • A.R. Khuharo
Keywords: Labeo gonius, LWR, growth condition, upstream and downstream environment, Indus River.


The current study reports the Length-weight relationship (LWR) and condition factor of Labeo genius from Matyari and Thatta, upstream and downstream respectively of River Indus; Sindh, Pakistan. In the current investigation, 17 Morphometric and 6 meristic traits of Labeo genius, 230 individuals of population A (upstream), and 195 individuals of population B (downstream) were analyzed. The expected LWR and condition factor was computed by LeCren (1951) formula and the Fulton condition factor also was calculated for both populations. LWR for population A was found r2=0.876 and r2=0.846 was recorded for population B. Whereas, the physical association of population A was found to be as b=2.782 and a=0.038. While for population B it was recorded as b=2.063 and a=0.045. Further, the LeCren condition factor was Kn=41.561 and Kn= 44.0234 for population A and B, respectively. In further, the Fultons condition factor K=12.486 was calculated for population A and K=13.832 was calculated for population B. The b value of Labeo genius showed less than the standard value (b=3) in present research which indicates the fishes become lighter as it grows. Whereas smaller variation in findings might be because of food accessibility and state of development. The Condition factor follows, throughout its changes, a report on the physiological status of the fish relative to its benefit. The variation in the value of k and kn of the fish has been basically relegated to reliance on numerous components such as feeding, intensity, fish size, and accessibility of fish. These dissimilar figures specify the quantity of nourishment resource accessibility and ecological circumstances. Overall, the study suggests that there are poor nutritional supplements in the environment, even downstream is poor as compared to the upstream. Further, investigations needed on the nutrient contents in both the environment for better fishery sources in the future.  The findings of this research might be helpful as supportable administration in addition to the fishing supervisor.