DOI: https://doi.org/10.36347/sajb.2025.v13i11.011

Pages: 1558-1566

This study was conducted from April to June 2024 at the Taabo dam lake. It enabled the selectivity to be assessed by analyzing the catches of two CNRA seine prototypes and the reference seine. The results of the analysis show that the average length of P. leonensis captured by prototypes 1 and 2 are 31.20 ± 4.61 mm and 32.34 ± 4.76 mm, respectively. The reference seine catches a medium-sized stock of 30.22 ± 2.67 mm. The proportions of immature specimens in landings are 34.22%, 28.64%, and 36.31% for prototype 1, prototype 2, and the reference seine, respectively. Regarding mature individuals of P. leonensis in the catches, the rate is 65.78% for prototype 1, 71.36% for prototype 2, and 61.59% for the reference seine. Fish of optimal size account for 25.78% of catches with prototype 2, 20.80% with prototype 1, and 16.82% with the reference seine. From R = 50% corresponding to a size of 35.03 mm, the size frequencies decrease until they reach 65 mm for catches from prototype 2 and 61.38 mm for landings from prototype 1. Beyond 35.03 mm, the size of catches decreases to 43.29 mm in the reference seine.