Sarotherodon melanotheron and Tilapia guineensis were studied in Mahin Lagoon and Idiogba in the coastal waters of Ondo State to determine their sizes, length-weight relationships, and condition factors. The mean total length and weight for S. melanotheron were 13.35±1.66 cm and 48.41±20.89 g in Mahin, and 13.44±1.72 cm and 49.96±20.80 g in Idiogba, respectively. Meanwhile, the values recorded for T. guineensis were 16.06±4.83 cm and 104.81±107.94 g in Mahin, and 15.00±3.74 cm and 78.98±81.51 g in Idiogba. This morphological similarity revealed an overlap of data between the populations of the two species in Mahin Lagoon and Idiogba. The regression coefficient (b) of length and weight revealed that S. melanotheron exhibited hypoallometry (b=2.55; a=-2.76; R2=0.78) in Mahin and (b=2.31; a=-2.13; R2=0.78) in Idiogba, while T. guineensis exhibited hyperallometry (b=3.04; a=-4.06; R2=0.96) in Mahin and (b=3.05; a=-4.11; R2=0.92) in Idiogba. The condition factor was greater than 2 for both species, although it was higher in T. guineensis (K=2.53 in Mahin and K=2.34 in Idiogba) than in S. melanotheron (K=2.04 in Mahin and K=2.06 in Idiogba). Therefore, this study revealed that both species were very fat and healthy despite anthropogenic activities in the study area.
Bwanika, G.; Murie, D.; Chapman, L. (2007). Comparative Age and Growth of Nile Tilapia (Oreochromis niloticus. L.) in Lakes Nabugabo and Wamala, Uganda. Hydrobiologia, 589, 287‒301.
El-Wakil, H. F.; Seehy, M. A.; El-Dahhar, A. A.; Ibrahim, M. M.; Hemeida, A.A.; Abass, N.Y. (2010). The Effect of Environmental Condition of genetic background in Nile Tilapia (O. niloticus). Journal of Arabian Aquaculture Society, 5, 101‒118.
Ridha, M.T. (2006). Tilapia culture in Kuwait constraints and solutions. Naga World Fish center Quarterly, 29, 71‒73.
Oladimeji, T. E.; Olaosebikan, T. O. (2017). Morphological Variability of Tilapia zillii (Gervais, 1848) from Selected Reservoirs in Southwestern, Nigeria. Ife Journal of Science, 19, 15‒25. https://doi.org/10.4314/ijs.v19i1.3.
Pinheiro, A.; Teixeira, C.M.; Rego, A.L.; Marques, J.F.; Cabral, H.N. 2005. Genetic and morphological variation of Soleal ascaris (Risso, 1810) along the Portuguese coast. Fisheries Research, 73, 67‒78.
Ajibare, A.O.; Olawusi-Peters, O.O.; Bello-Olusoji, O.A. (2017). Effects of Seasons on the Length-Weight Relationship and Condition Factor of two Brackish Water Shrimps in Ondo State, Nigeria. Nigerian Journal of Agriculture, Food and Environment, 13, 52‒58.
Webster, M.M.; Atton, N.; Hart, P.J.B.; Ward, A.J.W. (2011). Habitat - Specific Morphological Variation among Threespine Sticklebacks (Gasterosteus aculeatus) within a Drainage Basin. PLOS ONE, 6, e21060. https://doi.org/10.1371/journal.pone.0021060.
Ajibare, A.O.; Loto, O.O. (2022). Length-weight relationship and condition factor of Sarotherodeon melanotheron and Tilapia guinensis in Lagos Lagoon, Nigeria. Agrosearch, 21, 57‒66.
Loto, O.O.; Ajibare, A.O.; Abah, J.P. (2021). Gut contents, feeding ecology and condition factor Sarotherodeon melanotheron inhabiting Lagos Lagoon, Nigeria. International Journal of Science for Global Sustainability, 7, 69‒74.
Omotayo, F.; Oluwadare, A.; Modupe, A.M. (2018). Length-Weight Relationship and Condition Factor of Two Species of Tilapia and One Species of Mormyrops from a Tropical Dam in a Southwestern State, Nigeria. Journal of Ecology & Natural Resources, 2, 124‒132. http:/doi.org/10.23880/JENR-16000124.
Ajibare, A.O.; Omobepade, B.P.; Loto, O.O. (2020). Condition Factor and Length-Weight Relationship of Berried African River Prawn (Macrobrachium vollenhovenii) in Asejire Reservoir, Nigeria. West African Journal of Fisheries and Aquatic Sciences, 1, 35‒42.
Ndimele, P.E.; Kumolu-johnson, C.A.; Aladetohun, N.F.; Ayorinde, O.A. (2010). Length-weight relationship, condition factor and dietary composition of Sarotherodon melanotheron (Rupell, 1852) (Pisces: Cichlidae) in Ologe Lagoon, Lagos, Nigeria. Agriculture and Biology Journal of North America, 2, 174‒179.
George U. U.; Idung J. U.; Andem, A.B.; Okorafor, K.A.; Mowang, D. (2013). Diet Composition and Condition Factor of Ethmalosa fimbriata in the Cross River Estuary. Greener Journal of Biological Sciences, 3, 244‒252.
Akombo, P.M.; Akange, E.T.; Adikwu, I.A.; Araoye, P.A. (2014). Length-weight Relationship, Condition Factor and Feeding Habits of Synodontis clarias (Linnaeus, 1758) in the Lower River Benue at Makurdi, Nigeria. Nigerian Annals of Pure and Applied Sciences, 6, 59‒67. http://doi.org/10.46912/napas.9.
Omoniyi, I.T.; Agbon, A.O. (2008). Morphometric variations in Sarotherodon melanotheron (Pisces: Cichlidae) from Brackish and freshwater habitats in South-western Nigeria. West African Journal of Applied Ecology, 12, 01‒05. http://doi.org/10.4314/wajae.v12i1.45767.
Solomon, S.G.; Okomoda, V.T.; Ogbenyikwu, A.I. (2015). Intraspecific morphological variation between cultured and wild Clarias gariepinus (Burchell) (Clariidae, Siluriformes). Archives of Polish Fisheries, 23, 53‒61. http://doi.org/10.1515/aopf-2015-0006.
Ukenye, E.A.; Taiwo, I.A.; Ezekiel, M.O.; Udoezika, U.C. (2015). Morphological Variation of Ten Tilapia guineensis Populations in Selected Rivers in Nigerian coastal waters. International Journal of Sciences: Basic and Applied Research, 24, 273‒284.
Oladimeji, T.E.; Awodiran, M.O.; Komolafe, O.O. (2015). Genetic Differentiation Studies among Natural Populations of Tilapia zillii. Notulae Scientia Biologica, 7, 423‒429. http://doi.org/10.15835/nsb749649.
Olaosebikan, B.D.; Raji, A. (2013). Field guide to Nigerian Freshwater Fishes. Revised Edition. Federal College of Freshwater Fisheries Technology: New Bussa, Nigeria.
Indarjo, A.; Salim, G.; Nugraeni, C.D.; Zein, M.; Ransangan, J.; Prakoso, L.Y.; Suhirwan, A.S. (2021). Length-weight relationship, sex ratio, mortality and growth condition of natural stock of Macrobrachium rosenbergii from the estuarine systems of North Kalimantan, Indonesia. Biodiversitas, 22, 846‒857. http://doi.org/10.13057/biodiv/d220239.
Kara, C.A.; Alp, A.; Gurlek, M.E. (2011). Morphological variations of the trouts (Salmo trutta and Salmo platycephalus) in the rivers of Ceyhan, Seyhan and Euphrates, Turkey. Turkish Journal of Fisheries and Aquatic Sciences, 11, 77‒85. http://doi.org/10.4194/trjfas.2011.0111.
Khayyami, H.; Zolgharnein, H.; Salamat, N.; Movahedinia, A. (2015). Morphological Variability of Liza klunzingeri (Day, 1888) from Bandar Abbas Port and Qeshm Island in Nor theaster n Persian Gulf. Journal of Fisheries and Aquatic Science, 10, 191‒198. http://doi.org/10.3923/jfas.2015.191.198.
Suneetha, G.K.B. (2007). Morphological heterogeneity and population differentiation in the green chromide Etroplus suratensis (Pisces: Cichlidae) in Sri Lanka. Ceylon Journal of Biological Sciences, 36, 100‒107.
Oso, J.A.; Idowu, E.O.; Edward, J.B.; Adewumi, A.A.; Fadiya, O. (2017). Condition Factor and Dietary Composition of Oreochromis niloticus from Ero Dam in Ikun Ekiti, Ekiti State, Nigeria. International Journal of Agriculture and Environmental Researce, 3, 2995‒3004.
Langerhans, B.R., Layman, C.A., Langerhans, A.K.; Dewitt, T.J. (2003). Habitat associated morphological divergence in two Neotropical fish species. Biological Journal of the Linnean Society, 80, 689‒698. https://doi.org/10.1111/j.1095-8312.2003.00266.x.
SUBMITTED: 17 October 2023
ACCEPTED: 06 January 2024
PUBLISHED:
14 January 2024
SUBMITTED to ACCEPTED: 81 days
DOI:
https://doi.org/10.53623/tebt.v2i1.333