Length-Frequency Distribution and Relative Condition Factor of Brycinus nurse in the New Calabar River, Niger Delta, Nigeria

Abstract

This study assessed the length-frequency distribution and condition factor of Brycinus nurse from two sampling stations in the New Calabar River. A total of 401 individuals of B. nurse were collected from artisanal fishers and assessed between February 2020 and January 2021. The collected samples were analyzed for growth pattern using FISAT II. The mean values were 11.80±1.59 cm and 9.52±1.28 cm for total length and standard length The mean weight was 20.63±8.38 g. The length-weight relationship revealed an exponent b value of 2.539, showing negative allometric growth. The condition factor ranged from 1.09 to 1.42 indicating that the species is in good growth condition. The size structure of B. nurse recorded indicated that most individuals were relatively medium to small sizes and were not allowed to grow to adults as a result of overfishing. Therefore, proper management and intervention is needed to manage overexploitation of B. nurse in the New Calabar River.

Keywords

• Growth pattern
• Condition factor
• Length frequency

References

1. Abobi, S. M., & Ekau, W. (2013). Length-weight relationships and condition factors of Alestes baremoze, Brycinus nurse and Schilbe intermedius from the lower reaches of White Volta River (Yapei), Ghana. International Journal of Fisheries and Aquaculture, 5(6), 152-165. https://doi.org/10.5897/IJFA2012.0001
2. Abowei, J. F. N. (2000). Aspect of the fisheries of the lower Nun River. [Ph.D. Thesis. University of Port Harcourt].
3. Adesulu, E. A., & Sydenham, D. H. J. (2007). The freshwater and fisheries of Nigeria. Macmillan Nigeria Publishers Limited.
4. Arawomo, G. A. O. (1982). Food and feeding of three Distichodus species (Pisces: Characiformes) in Lake Kianji, Nigeria. Hydrobiology, 94, 177-181.
5. Bailey, R. G. (1994). Guide to the fishes of the River Nile in the Republic of the Sudan. Journal of Natural History, 28, 937-970. https://doi.org/10.1080/00222939400770501
6. Boulenger, D. P. (2002). The biology of Brycinus species from Lekki Lagoon, Lagos State, Nigeria Journal of Science, 12, 73-84.
7. Brown, C. A. (1985). The food and feeding relationship of non-cichlid fishes of Ikpoba River, downstream of the dam. [MSc. Thesis. University of Benin].
8. Carlander, K. D. (1969). Handbook of freshwater fishery biology. The Iowa State University Press.

9. Dankwa, H. R. (2003). Traditional knowledge of freshwater fishes in some fishing communities in Ghana (pp. 223-229). In M. L. D. Palomares, B. Samb, T. Diouf, J. M. Vakily & D. Pauly (Eds.), Fish Biodiversity: Local Studies as Basis for Global Inferences. ACP-EU Fisheries Research Reports. (14), 281 p.
10. Dienye, H. E., & Woke, G. N. (2015). Physico-chemical parameters of the upper and lower reach of the New Calabar River Niger Delta. Journal of Fisheries and Livestock Production 3, 154. https://doi.org/10.4172/2332-2608.1000154
11. Erondu, E. S. (1983). Tidal and seasonal influence on the physico-chemical conditions of the New Calabar River at Aluu. [MSc. Thesis. Rivers State University of Science and Technology].
12. Froese, R. (2006). Cube law, condition factor and weight–length relationships: history, meta‐analysis and recommendations. Journal of Applied Ichthyology, 22(4), 241-253. https://doi.org/10.1111/j.1439-0426.2006.00805.x
13. Fulton, T. W. (1904). The rate of growth of fishes. 22nd Annual Report of the Fishery Board Scotland, Edinburgh, 3, 141-241.
14. Gayanilo, F. C., Sparre, P., & Pauly, D. (2005). FAO-ICLARM Stock Assessment Tools II (FiSAT II).vUser’s guide. FAO Computerized Information Series (Fisheries). No. 8, Revised version, FAO, Rome, 168 pp.
15. Getahun, A. (2007). An overview of the diversity and conservation status of the Ethiopian freshwater fauna. Journal of Afrotropical Zoology, (Special Issue), 87-96.
16. Ikomi, R. B., & Sikoki, F. D. (2001). Studies on the distribution, abundance, growth pattern and dietary habits of Brycinus nurse, Ruppel 1832 (Osteichthyes: Characidae) in the River Jamieson, Nigeria. Acta Ichthyologia Piscatoria, 31(1), 27-43. https://doi.org/10.3750/AIP2001.31.1.02
17. Iyabo, U. B. (2014). Length weight relationship, condition factor and diet composition of Brycinus nurse (Characiformes: Alestidae) in a tropical flood river basin. Continental Journal of Fisheries and Aquatic Science, 8(1), 25-34.
18. Komolafe, O. O., & Arawomo, G. A. O. (2011). Observations in the composition, physiological condition, and fisheries in Erinle Lake, Osun state, Nigeria. West African Journal of Applied Ecology, 18, 71-78. https://doi.org/10.4314/wajae.v18i1.70317
19. Lalèyè, P. A. (2006). Length-weight and length-length relationships of fishes from the Oueme River in Benin (West Africa). Journal of Applied Ichthyology, 22(4), 330-333. http://dx.doi.org/10.1111/j.1439-0426.2006.00752.x
20. Le Cren, E. D. (1951). The length-weight relationship and seasonal cycle in gonad weight and condition in the perch (Perca fluviatilis), Journal of Animal Ecology, 20(2), 201-219. https://doi.org/10.2307/1540
21. Mohanraj, G. (2000). Studies on the biology and population dynamics of the goatfishes (Pisces: Mullidae), Upeneus bensasi and Upeneus moluccensis of Madras coast. [Ph.D. Thesis. University of Madras].
22. Nehemia, A., Maganira, J. D., & Rumisha, C. (2012). Length-weight relationship and condition factor of tilapia species grown in marine and fresh water ponds. Agriculture and Biology Journal of North America, 3(3), 117-124. https://doi.org/10.5251/abjna.2012.3.3.117.124
23. Olopade, O. A., Dienye, H. E., & Nworgu, U. C. (2019). Estimation of growth, mortality, and exploitation status of nurse tetra (Brycinus nurse) and true big scale tetra (Brycinus macrolepidotus) (Family: Alestidae) from the New Calabar River, Nigeria. Indonesian Fisheries Research Journal, 25(2), 113-122. https://doi.org/10.15578/ifrj.25.2.2019.113-122
24. Ozcan, G., & Balik, S. (2009). Some biological parameters of the bergamae barb, Capoeta bergamae Karaman, 1969 (Cyprinidae) in Kemer reservoir (Aydin, Turkey). North-Western Journal of Zoology, 5(2), 242-250.
25. Paugy, D. (1979). Ecology and biology of Alestes nurse (Pisces, Characidae) of the Ivory Coast rivers. Cahiers ORSTOM. Serie Hydrobiologie, 13(4), 143-149.
26. Paugy, D. (1990). Note à propos des Petersiini (Teleostei: Characidae) d’Afrique occidentale. Ichthyological Exploration of Freshwaters, 1(1), 75-84.
27. Paugy, D. (2003). Alestidae. (pp. 236-282). In D. Paugy, C. Lévêque & G. G. Teugels (Eds.), The fresh and brackish water fishes of West Africa Volume 1. Coll. faune et flore tropicales 40. Institut de recherche de développement, Paris, France, Muséum national d’histoire naturelle, Paris, France and Musée royal de l’Afrique Central, Tervuren, Belgium, 457p.
28. Reed, W. J., Buchard, A. J., Hopson, J., Jennes, J., & Yaro, I. (1967). Fish and fisheries of Northern Nigeria. Ministry of Agriculture, Northern Nigeria. 226 pp. Research Planning Institute (RPI). (1985). Environmental baseline studies for the establishment of control criteria and standards against petroleum-related pollution in Nigeria. Report No RPI/R/84/4/15-7.
29. Riede, K. (2004). Global register of migratory species - from global to regional scales. Final Report of the R&D Project 808 05 081. Federal Agency for Nature Conservation, Bonn, Germany. 329 p.
30. Saliu, J. K., & Fagade, S. O. (2004). The structural and functional morphology of the hard parts of Brycinus nurse (Pisces: Cypriniformes, Characidae), from Asa Reservoir, Ilorin, Nigeria. Turkish Journal of Fisheries and Aquatic Sciences, 4, 23-31.