Some Aspects of the Growth Parameters of the Fishes of Ibrahim Adamu Lake, Kazaure Jigawa State, Nigeria

Abstract

The growth parameters and age for the fish species from the lake (O. niloticus, S. galilaeus and B. bayad) were computed through interpretation of marks found on their Opercula bones which were then fitted into Vonbertallanfy growth model. Their asymptotic length (L∞) ranged from 175mm-520nm. The growth performance index Ф' ranged from 3.6622-4.9420 and K value from 0.10-0.35. O. niloticus L∞, K and Ф' values ranged from 175mm-192.5mm, 0.15-0.25, 3.6622-3.9668 and were found to live up to 7 + years in the lake. The values of S. galilaeus ranged from 200mm-240mm, 0.12-0.17 and 3.8211-3.8222 and living up to 5 + while B. bayad had a range of 500mm-520mm, 0.10-0.35, 4.4320-4.9420 and lives up to 6+ in the lake. All the growth parameters for the fish species were fitted into the Vonbertallanfy growth model. L t =L∞ (i-ek (t-t o)

The Growth Parameters and Mortalities of Five Species of Synodonits in the Lower River Benue at Makurdi

“…Whereas in S.membranaceus, S.gambiensis and S.clarias, the males had a faster growth rate than the females. The findings of this study was similar with that of [21] and [24] .…”

“…The results of this work on Growth performance index (Ø') was in conformity with [9] who reported the length performance index (Ø') of 2.63 in Hemisynodontis membranaceus. More so, the results was similar to [24] who observed the length performance indices of 2.71 in S.schall, 2.63 in S.membranaceus, and 3.23 in S.clarias. Further, the result was similar to [19] who reported the growth performance indices in length of S.schall as 2.689, 2.692 and 2.709 in the males, females and combined sexes respectively.…”