Growth Parameters and Condition Coefficient of Three Species from Bas-Kouilou (Congo Brazzaville): Chrysichthys auratus , Geoffroy, 1809, Liza falcipinnis , Valenciennes, 1836 and Pellonula vorax , Gunther, 1868

Abstract

The study of the morphometric parameters of the three most abundant species in the lower course of the Kouilou River ( Chrysichthys auratus , Liza falcipinnis and Pellonula vorax ) was carried out. The standard length of Chrysichthys auratus varies between 43.57 and 210 mm, for an average of 96.70 ± 28.63 mm; the weight varies between 2.92 and 140.83 mg, an average of 73.03 ± 21.62 mg. The condition coefficient is equal to 4.42 ± 1.52. Liza falcipinnis has a standard length which varies between 59.9 mm and 158.08 mm for an average of 88.15 ± 29.74 mm; its weight varies between 4.77 and 76.21 mg, an average of 18.61 ± 11.82 mg. The condition coefficient is equal to 2.47 ± 1.57. Pellonula vorax has a standard length which varies between 60.33 mm and 117.72 mm; for an average of 80.48 ± 17.75 mm; the weight varies between 3.61 and 25.17 mg, an average of 9.03 ± 3.61 mg. The condition coefficient is equal to 2.17 ± 0.57. These three species have a minor allometric growth.