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by
J.K. Ipinjolu |
Total Records (
3 ) for
J.K. Ipinjolu |
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B.A. Shinkafi
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J.K. Ipinjolu
and
W.A. Hassan
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The aim of this study was to gain knowledge on the gonad morphology and to determine the stages of gonad maturation in Auchenoglanis occidentalis (Cuvier and Valenciennes), based on macroscopic and histological procedures. A total of 800 samples, of which 398 were females, 399 males and 3 with unidentified sex were examined between November 2005 and December 2008. The samples ranged in total length from 6.60 to 33.00 cm with a mean of 19.51±4.50SD and from 2.26 to 462.90 g total weight with a mean of 100.05±70.09 SD. In females, mean ovary weight was 2.74±0.23 SE, mean left ovary length 3.70±0.08 SE, mean left ovary width 0.59±0.03 SE, mean right ovary length 3.65±0.08 SE and mean right ovary width 0.57±0.02 SE. In males, mean testis weight was 0.17±0.03 SE, mean left testis length 2.75±0.06 SE, mean left testis width 0.20±0.01 SE, mean right testis length 2.74±0.06 SE and mean testis width 0.19±0.01SE. This shows that in both sexes, the left gonads were slightly larger than the right ones. Six stages of gonad maturation were established for the females and males namely, immature (I), maturing (II), mature (III), ripe and running (IV), spent (V) and resting (VI). Based on macroscopy, eggs of various sizes and colours were found in each ovary, while histologically, various stages of oocytes and spermatocytes developed in each ovary and testis, respectively, indicating multiple spawning in both sexes. Spawning of the species occurs during the peak of rainy season in River Rima, which is between July and September. |
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B.A. Shinkafi
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J.K. Ipinjolu
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This study was carried out on Auchenoglanis occidentalis (Cuvier and Valenciennes) from River Rima, North-Western Nigeria to provide information on morphometric relationships and relative condition factor. A total of 800 samples of A. occidentalis of which 398 were females and 399 males (giving a ratio of about 1:1) were examined between November 2005 and December 2008. Biometric data such as Total Length (TL) and Total Weight (TW) measurements were recorded in the laboratory. The samples ranged in total length from 6.60-33.00 cm with a mean of 19.51±4.50 SD and from 2.26-462.90 g total weight with a mean of 100.05±70.09 SD. For the length-length relationships, the b values were 0.814 for TL-SL; 0.242 for TL-HL; 0.200 for GTH-TL and 0.779 for HL-GTH, suggesting negative allometry or faster increase in Total Length (TL) than in all the other length parameters. The species exhibited isometric growth pattern in the overall samples (b = 3.023), females (3.001), males (3.002), dry season samples (2.969) and those ≥15 cm (3.030). Samples <15 cm exhibited negative allometry (2.851) while those caught during rainy season exhibited positive allometry (b = 3.113). The species were found to be in good condition with an overall Kn value of 2.27±0.08 SD in females and 2.26±0.08 SD in males in the river. In both sexes, samples ≥15 cm were in significantly (p<0.05) in better condition than those <15 cm and likewise, samples in the rainy season had higher (p<0.05) Kn values than those in the dry season. Based on gonad maturation stages, samples in the mature, ripe and running, spent and resting stages were in significantly (p<0.05) better condition than those in the maturing and immature stages. |
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E.A. Ogunsan
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J.K. Ipinjolu
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A.I. Daneji
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D.O. Ehizibolo
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A.U. Junaidu
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U.M. Chafe
and
F.M. Tambuwal
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In an experiment conducted to determine the effect of including Monechma ciliatum (MC) in the diet of rabbit at 0 (control) 10, 20 and 30% levels, the results showed that increasing the level of supplementation of MC beyond 10% decreased feed intake and subsequently live weight gain. Dry matter digestibility also follow similar pattern. The least cost of feed per kilogram (kg) live weight gain of $0.75 also occurred at the 10% inclusion level of MC. Although, blood parameters differed between treatments, they were mostly within physiological limits, suggesting no adverse effects in feeding MC to the animals. |
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