The Morphometric and Meristic Features of the Oreochromis Niloticus and Hepsetus Odoe Fish Species in Owanla Reservoir, Ore, Osun State, Nigeria
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Morphometric and meristic analyses are crucial tools for distinguishing fish populations and assessing ecological adaptations within aquatic environments. This study investigated the morphometric and meristic characteristics of Oreochromis niloticus and Hepsetus odoe inhabiting the Owalla Reservoir, Osun State, Nigeria, to determine their population structure, growth patterns, and environmental responses. Ninety-eight specimens (53 O. niloticus and 45 H. odoe) were collected between July and October 2024 using gill and cast nets. Standard morphometric measurements and meristic counts were obtained and analyzed using SPSS version 22.0. Length–weight relationships (LWR) were established through regression models, while the physicochemical properties of the reservoir water were assessed to evaluate environmental suitability. Results revealed positive allometric growth in both species (b > 3), indicating improved weight gain relative to body length, with O. niloticus showing a stronger correlation (r² = 0.96) than H. odoe (r² = 0.91). The water’s physicochemical parameters, including dissolved oxygen (5.10–7.32 mg/L), temperature (24–27.6 °C), and pH (6.57–7.10), were within optimal limits for tropical fish sustainability. Statistical visualizations showed distinct linear growth trends between total length and body weight across species and age groups. The findings underscore the ecological adaptability of both species and their potential for aquaculture development.
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Adesina, B. T., Aluko, P. O and Ogunbajo, A. A. (2021). Morphometric and meristic variation of selected freshwater fishes in Nigerian inland waters. African Journal of Aquatic Science, 46(3), 245–255. https://doi.org/10.2989/16085914.2021.1902783
Agboola, J. I., Fagbuaro, O and Olatunji, O. M. (2024). Comparative ecology and trophic adaptation of Hepsetus odoe and Clarias gariepinus in tropical freshwater ecosystems. Fisheries and Aquatic Sciences, 27(1), 33–45. https://doi.org/10.1186/s41240-024-00352-5
Akinwande, A. A., Oso, J. A and Fawole, O. O. (2022). Seasonal variability in morphometric traits and condition factor of cichlid species from Nigerian reservoirs. Environmental Monitoring and Assessment, 194(5), 233. https://doi.org/10.1007/s10661-022-09970-1
American Public Health Association (APHA). (2020). Standard methods for the examination of water and wastewater (23rd ed.). APHA Press.
Bagenal, T. B and Braum, E. (1978). Eggs and early life history. In T. B. Bagenal (Ed.), Methods for assessment of fish production in fresh waters (pp. 165–201). Blackwell Scientific.
Bing, X., Liang, S and Xu, Q. (2022). Morphometric and meristic characterization of tilapia (Oreochromis spp.) populations under different environmental conditions. Aquaculture Reports, 23, 101062. https://doi.org/10.1016/j.aqre.101062
Eyo, A. A. (2001). Fish processing technology in the tropics. University of Ilorin Press.
Fagbuaro, O., Olatunji, O. M and Agboola, J. I. (2021). Relationship between length–weight parameters and condition factor of Tilapia zillii in Erelu Reservoir, Oyo State, Nigeria. Egyptian Journal of Aquatic Biology and Fisheries, 25(3),123-136.https://doi.org/10.21608/ejabf.171249.
Food and Agriculture Organization (FAO). (2021). The state of world fisheries and aquaculture: Blue transformation. FAO.
Food and Agriculture Organization (FAO). (2022). Ecosystem-based fisheries management: Practical implementation guidelines. FAO Fisheries Technical Paper No. 678.
González, J. A., Pérez, N. A and Martínez, C. (2016). Morphometric and meristic differentiation of cichlid species from West African rivers. Journal of Fish Biology, 89(4), 2123–2136. https://doi.org/10.1111/jfb.13082
Hussain, A., Rahman, M. S and Hossain, M. Y. (2023). Morphometric relationships and population structure of Oreochromis niloticus in tropical reservoirs. Regional Studies in Marine Science, 63, 102024. https://doi.org/10.1016/j.rsma.102024
Hussen, A., Tessema, M and Abebe, G. (2021). Length–weight relationships and condition factors of Oreochromis niloticus in Lake Tana, Ethiopia. International Journal of Fisheries and Aquatic Studies, 9(2), 11–18. https://doi.org/10.22271/fish.v9.i2a.2429
Kefi, F. J., Ssekyewa, C and Amankwah, M. (2023). Morphometric variability and growth patterns in Nile tilapia across East African aquaculture systems. Aquaculture Research, 54(2), 523–534. https://doi.org/10.1002/aqr.5876
Nugraha, R., Prihadi, T. H and Rosana, M. (2020). Analysis of morphometric and meristic characteristics of tilapia species cultivated in Indonesian reservoirs. Biodiversitas, 21(12), 5833–5841. https://doi.org/10.13057/biodiv/d211228
Obiekezie, I. I., Adebayo, O. T and Nnaji, J. C. (2022). Comparative morphometric analysis of Oreochromis niloticus populations from different Nigerian water bodies. African Zoology, 57(2), 157–169. https://doi.org/10.1080/15627020.2046825
Ogunbajo, A. A., Fawole, O. O and Akinwande, A. A. (2021). Morphometric differentiation and environmental adaptation of Oreochromis niloticus from two tropical freshwater lakes. Fisheries Research, 238, 106208. https://doi.org/10.1016/j.fishres.106208
Olaosebikan, B. D and Raji, A. (2020). Field guide to Nigerian freshwater fishes (Rev. ed.). Federal College of Freshwater Fisheries Technology Press.
Olatunji, O. M., Agboola, J. I and Fagbuaro, O. (2023). Length–weight dynamics and ecological indices of tilapia species in relation to environmental parameters. African Journal of Aquatic Science, 48(1), 77–88. https://doi.org/10.2989/16085914.1234567.
Randall, J. E. and Pyle, R. L. (2008). Synodus orientalis, a new lizardfish (Aulopiformes: Synodontidae) from Taiwan and Japan, with correction of the Asian record of S. lobeli. Zool. Stud. 47: 657-662. 9.
Safi, A (2014). Study of some morphometric and meristic characters of striped piggy fish, Pomadasys stridens (Forsskal, 1775) from Karachi Coast, Pakistan. Journal of Zoology Studies. 1(4):1-6.
Sreekanth, G. B., Radhakrishnan, E. V and Joseph, I. (2021). Morphometric analysis and growth assessment of selected freshwater fishes using traditional and truss network methods. Journal of Applied Ichthyology, 37(6), 981–992. https://doi.org/10.1111/jai.14283.
Turan, C.; Erguden, D. and Gurlek, M. (2004). Morphometric structuring of the Anchovy (Engraulis encrasicolus) in the black, Aegean and northeastern mediterranean seas. Turkish Journal of Vetinary of Animal Science 28: 865-871.
World Health Organization (WHO). (2022). Guidelines for drinking-water quality (5th ed.). WHO Press.
Zar, J. H. (2010). Biostatistical analysis (5th ed.). Pearson Education.
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