The study focused on the weight-length relationship and condition factor of three species of fish in this river's collection. The biometric characterisation of three species (Enteromius holotaenia, Doumea typica and Chiloglanis cameronensis) from the river loulali was carried out. The standard length of E. holotaenia varied between 22.02 and 98.75 mm, with a mean of 61.46 ± 15.62 mm. The correlation coefficient r = 0.99, showing a strong correlation between the two parameters studied. The coefficient b equal to 3.21 indicates that this species has a major allometric growth. The standard length of Doumea typica specimens ranged from 64.57 mm to 171 mm, with an average of 106.28 ± 29.80 mm. The correlation coefficient r = 0.99, showing a very strong correlation between the two parameters studied. The b coefficient was 3.08, indicating isometric growth. The standard length of Chiloglanis cameronensis varies between 22.48mm and 101.07mm, the correlation coefficient r is equal to 0.99, the correlation between weight and standard length is strong. The b coefficient is equal to 3.26, proof of allometric growth, and the size structure is unimodal.
