Indexing
All Issues
Submission
Author Guidelines
Reviewers
Editorial Members
Publication Fee
Vol.2 , No. 5, Publication Date: Jul. 22, 2015, Page: 215-219
 in the Mid Cross River Flood System, Southeastern Nigeria&description=Fecundity, egg, size, condition factor, gonad somatic index etc of the specie Siluronodon auritus were studied between the months of April- August 2008, in the mid Cross River flood system. The total of 350 fishes that were studied showed the specie to be a multiple spawner and the breeding period was identified to be between May and June. The fecundity of the population varied from 6031 eggs (L= 21.4cm, W= 35.3g) and 1130 eggs (L=16.0cm and W=23.1g). A mean relative fecundity of this population of 270 eggs/cm or 155 egg of the fish was obtained with the total length measured in (cm) and weight (g). The condition factor (k) of the population varied from 0.96-1.43 with 0.634 as the mean; 53.7% had higher condition factor than the mean and 46.1% had condition factor below unity indicating that the population was slightly in good condition. The fecundity and condition factor obtained in this study are evidence that the Cross- River basin population of S. auritus can make or provide excellent bloodstock.&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. |
Fecundity, egg, size, condition factor, gonad somatic index etc of the specie Siluronodon auritus were studied between the months of April- August 2008, in the mid Cross River flood system. The total of 350 fishes that were studied showed the specie to be a multiple spawner and the breeding period was identified to be between May and June. The fecundity of the population varied from 6031 eggs (L= 21.4cm, W= 35.3g) and 1130 eggs (L=16.0cm and W=23.1g). A mean relative fecundity of this population of 270 eggs/cm or 155 egg of the fish was obtained with the total length measured in (cm) and weight (g). The condition factor (k) of the population varied from 0.96-1.43 with 0.634 as the mean; 53.7% had higher condition factor than the mean and 46.1% had condition factor below unity indicating that the population was slightly in good condition. The fecundity and condition factor obtained in this study are evidence that the Cross- River basin population of S. auritus can make or provide excellent bloodstock.
Keywords
Fecundity, Gonad Somatic Index, Condition Factor, Siluronodon auritus and Cross River
Reference
| [01] | Adewumi, A.A. (2006). The growth and Gonadal maturation of the African Carp, Labeo parvus. Journal of Natural Science. 1: 127-131. |
| [02] | Barnes, M. E. (2003). Fecundity of North American Salmonidae. North American Journal of Agriculture 57: 451-457. |
| [03] | Nwadiaro, C.S and Okorie, P.U (1986). Some Aspects of the Reproductive Biology of C. Filamentous (Siluroides, Abgridae) in Oguta Lake, Imo State, Nigeria. Rev. Africa 99:223-241. |
| [04] | Okoh, F. A., Eyo, J. E. and Ezenwaji, H. M. G. (2007). Species composition and abundance of castnet fishery of a tropical lotic freshwater ecosystem. Bio-Research 5(1), 201-206. |
| [05] | Hunter, J.R., Macewicz, B.J. and Kimbrell, C.A. (1989). Fecundity and other aspects of the reproduction of sablefish Amploporna fimbria in Central California waters. CalCOFI Report 30: 61-72. |
| [06] | Ezenwaji, H.M.G. and Offiah, F.N. (2003). The biology of Pellonula leonensis Boulenger, 1916 (Osteichthyes: Clupeidae) in Anambra River, Nigeria. Journal of Biological Research and Biotechnology 1 (2): 33-50 |
| [07] | De Vlaming, V., Grossman G. and Chapman, F. (1982). On the use of gonadosomatic index. Comparative Biochemistry and Physiology 73:31-39. |
| [08] | King, R.P. (1991). Some aspects of the reproductive strategy of Iiisha Africana Block 1795 (Teleostely Clupeidae) in Iboe River estuary, Nigeria. Cybium 15: 257-267 |
| [09] | Ham, R. (19810. The ecology of six native and two introduced fish species in Enoggera creek system, South east Queens land. Bsc. (Hons) Thesis. Griffith Univ. Brisbane. |
| [10] | Fagade, S.O., Adebisi, A.A. and Atanda, A.N. (1984). The breeding cycle of Sarotherodon galilaeus in the I.I.T.A Lake, Ibadan, Nigeria. Arch. Hydrobiologia 100 (4): 493-500. |
| [11] | Ezenwa, B., Ikusemiju, L. and Olaniyan, C.I.O (1986). Comparative studies of the Cat Fish, Chrysichthys nigrodigitatus in three isolated geographical Areas in Nigeria for breeding purposes. 258-262pp. |
| [12] | Fagade, S.O. and Adebisi, A.A. (1979). On the fecundity of Chrysichthys nigrodigitatus (Lacépède) of Asejire Dam, Oyo State, Nigeria. Nig. J. Nat. Sci. 1:127-131 |
