Studies in variation in length-weight relationship, condition of factor and size distribution of Orechromis niloticus and Syndontis schall obtained in the ecology lower River Benue at Makurdi Nigeria

Abstract

The study was carried out to investigate the length, weight, condition of factor and the size distribution of two 
different species which were O.  niloticus and S. schall  from River Benue. The fish samples were obtained from 
Wadata fish market. The length-weight relationship was determined using Le standard method. Variation in 
standard length of S.schall range from 26.00 to 40.10cm, while standard length varied from14.00 to 21.01cm in 
O. niloticus. Similarly, total length ranged from 28.30 to 42.90cm in S. schall  and  bodyweight  varied from 
248.40  to 432.20g. The total length in O.niloticus ranged from 16.01 to 23.01cm and the bodyweight ranged from 
66.60 to 86.20g. However the weight of S.schall was higher than that of O.niloticus and perhaps this was due to 
the condition of  factor of the two different fish species and their feeding habits.