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Vol.2 , No. 4, Publication Date: Jul. 7, 2015, Page: 183-187
. In the laboratory, the specimens were investigated for sex ratios, gonad maturation and condition factor. A total of 208 fishes of the two species were collected. The overall sex ratio males/females in Parailla pelluada (1:0.7) showed that males (n = 64) were more than females (n = 47) while overall males/females in Schilbe intermedius sex ratio of (1:1.2) showed that females (n = 52) were more than males (n = 45). The gonad maturation stage was determined by measuring the immature, mature, ripe and spent gonad stages of the two species, and their monthly percentage occurrence determined. The monthly condition factor of the two species showed that they were in poor condition throughout the sampling months except for the month of August which recorded good condition for males of P. pellucida. The chi-square of the males/females of the two species were significance P. pellucida (X2cal = 1.41 > X2tab = 0.352) and S. intermedius (X2cal = 0.495 > X2tab = 0.352).&picture=http://www.aascit.org/aascit/decorators/img/journal/902.jpg)
| [1] | Uneke Bilikis Iyabo, Dept. of Applied Biology, Faculty of Biological Sciences, Ebonyi State University, Abakaliki, Ebonyi State, Nigeria. |
| [2] | Alionye Grace, Dept. of Applied Biology, Faculty of Biological Sciences, Ebonyi State University, Abakaliki, Ebonyi State, Nigeria. |
Aspects of the reproductive biology such as sex ratio, gonad maturation and condition factor of Paraiha pellucida and Schilbe intermedius, was investigated in the mid Cross river flood system.Sampling was done for 7 months (January to March and May to August). In the laboratory, the specimens were investigated for sex ratios, gonad maturation and condition factor. A total of 208 fishes of the two species were collected. The overall sex ratio males/females in Parailla pelluada (1:0.7) showed that males (n = 64) were more than females (n = 47) while overall males/females in Schilbe intermedius sex ratio of (1:1.2) showed that females (n = 52) were more than males (n = 45). The gonad maturation stage was determined by measuring the immature, mature, ripe and spent gonad stages of the two species, and their monthly percentage occurrence determined. The monthly condition factor of the two species showed that they were in poor condition throughout the sampling months except for the month of August which recorded good condition for males of P. pellucida. The chi-square of the males/females of the two species were significance P. pellucida (X2cal = 1.41 > X2tab = 0.352) and S. intermedius (X2cal = 0.495 > X2tab = 0.352).
Keywords
Sex Ratio, Gonad Maturation, Condition Factor, Parailla pellucida, Schilbe intermedius and Cross River
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