DOI QR코드

DOI QR Code

Biological aspects of Oreochromis niloticus (Linnaeus, 1758) in Geray Reservoir (Ethiopia) for effective sustainable fisheries

  • Received : 2023.08.14
  • Accepted : 2023.11.22
  • Published : 2024.02.29

Abstract

Biometric evaluation and reproductive biology of Oreochromis niloticus were studied from Geray Reservoir. Between November 2021 and August 2022, 316 O. niloticus specimens were collected from this reservoir. The observed male to female sex ratio was 1:1.14, which was statistically insignificant compared with the hypothetical 1:1 sex ratio (X2 = 1.27, p > 0.05). The length-weight relationship was curvilinear with allometric growth (b < 3) and statistically significant from the expected isometric growth pattern (b = 3). The regression equation for females was TW = 0.0264TL2.72 (r2 = 0.90, n = 168), males (TW = 0.0183TL2.79, r2 = 0.93, n = 148), and combined sexes (TW = 0.0229TL2.76, r2 = 0.91, n = 316). Gonadosomatic index (GSI) ranged from 0.8 to 1.4 (males) and 1.8 to 4.9 (females). The breeding season lasted from March to June, with a GSI peak in April. Fecundity ranged from 279 to 1,528 eggs./fish, with a mean of 1,025 eggs./fish. The correlation between absolute fecundity and length was more significant (F = 0.76TL2.8, R2 = 0.94, p < 0.05) than with weight (F = 17.683TW0.71, R2 = 0.92, p < 0.05). This study provides basic information on the biology of O. niloticus in the Geray Reservoir for future fishery management tools for the conservation and utilization of this valuable freshwater fish.

Keywords

Acknowledgement

We appreciate fishermen and fishery cooperative for their assistance during fish data collection in Geary Reservoir.

References

  1. Abera L. Current status and trends of fishes and fishery of a shallow rift valley lake, Lake Zeway, Ethiopia [M.S. thesis, Ph.D. dissertation]. Ethiopia: Addis Ababa University; 2016. 
  2. Armstrong MJ, Gerritsen HD, Allen M, McCurdy WJ, Peel JAD. Variability in maturity and growth in a heavily exploited stock: cod (Gadus morhua L.) in the Irish Sea. ICES J Mar Sci. 2004;61:98-112.  https://doi.org/10.1016/j.icesjms.2003.10.005
  3. Assefa WW, Getahun A. Length-weight relationship, condition factor and some reproductive aspects of Nile Tilapia, Oreochromis niloticus, in Lake Hayq, Ethiopia. Int J Zool Res. 2014;4:47-60. 
  4. AVMA Panel on Euthanasia. 2000 Report of the Avma panel on Euthanasia. J Am Vet Med Assoc. 2001;218:669-96.  https://doi.org/10.2460/javma.2001.218.669
  5. Bwanika GN, Makanga B, Kizito Y, Chapman LJ, Balirwa J. Observations on the biology of Nile tilapia, Oreochromis niloticus L., in two Ugandan crater lakes. Afr J Ecol. 2004;42:93-101.  https://doi.org/10.1111/j.1365-2028.2004.00468.x
  6. Dan-Kishiya AS. Length-weight relationship and condition factor of five fish species from a tropical water supply reservoir in Abuja, Nigeria. Am J Res Commun. 2013;1:175-87. 
  7. Das SK, Tou WX, Noor NM, De M, Samat A. Length-weight relationship, condition factor, and age estimation of commercially important trawl species from Mersing coastal waters, Johor, Malaysia. Sains Malays. 2021;50:1-7.  https://doi.org/10.17576/jsm-2021-5001-01
  8. Degsera A, Minwyelet M, Yosef T. Age and growth of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) from Lake Tana, Ethiopia. Afr J Aquat Sci. 2020;45:509-19.  https://doi.org/10.2989/16085914.2020.1753008
  9. Endebu M, Getahun A, Tessema M. Variations in reproductive characteristics among Oreochromis niloticus populations of three Ethiopian rift valley lakes. J Biol Sci. 2021;21:19-28.  https://doi.org/10.3923/jbs.2021.19.28
  10. Fagbuaro O, Ola-Oladimeji FA, Ekundare OV, Akinyemi O. 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. J Zool Res. 2019;3:1-5.  https://doi.org/10.22259/2637-5575.0301001
  11. Geffroy B, Wedekind C. Effects of global warming on sex ratios in fishes. J Fish Biol. 2020;97:596-606.  https://doi.org/10.1111/jfb.14429
  12. Golubtsov AS, Mina MV. Fish species diversity in the main drainage systems of Ethiopia: current state of knowledge and research perspectives. Ethiop J Nat Res. 2003;5:281-318. 
  13. Hirpo LA. Breeding season and condition factor of Oreochromis niloticus (Pisces: cichlidae) in Lake Babogaya, Ethiopia. Int J Agric Sci. 2012;2:116-20. 
  14. Hirpo LA. Reproductive biology of Oreochromis niloticus in Lake Beseka, Ethiopia. J Cell Anim Biol. 2013;7:116-20.  https://doi.org/10.5897/JCAB2013.0388
  15. Hirpo LA. Current ecological scenario of some Rift Valley Lakes of Ethiopia: a review. EC Agric. 2016;3:570-80. 
  16. Huang SC, Chang SK, Lai CC, Yuan TL, Weng JS, He JS. Length-weight relationships, growth models of two croakers (Pennahia macrocephalus and Atrobucca nibe) off Taiwan and growth performance indices of related species. Fishes. 2022;7:281. 
  17. Ighwela KA, Ahmed AB, Abol-Munafi AB. Condition factor as an indicator of growth and feeding intensity of Nile tilapia fingerlings (Oreochromis niloticus) feed on different levels of maltose. Am Eurasian J Agric Environ Sci. 2011;11:559-63. 
  18. Kebede MT, Getahun A, Lemma B. Reproductive biology of commercially important fish species in Lake Langeno, Ethiopia. Asian Fish Sci. 2018;31:319-39.  https://doi.org/10.33997/j.afs.2018.31.04.006
  19. Khanjani MH, Sharifinia M, Hajirezaee S. Recent progress towards the application of biofloc technology for tilapia farming. Aquaculture. 2022;552:738021. 
  20. Le Cren ED. The length-weight relationship and seasonal cycle in gonad weight and condition in the perch (Perca fluviatilis). J Anim Ecol. 1951;20:201-19.  https://doi.org/10.2307/1540
  21. Mohammed B, Tewabe D, Zelalem W, Melaku A. Physical, chemical, biological properties and fish species type of Geray reservoir, -W/Gojjam zone, Ethiopia. Int J Aquac Fish Sci. 2016;2:008-11.  https://doi.org/10.17352/2455-8400.000012
  22. Mortuza MG, Al-Misned FA. Length-weight relationships, condition factor and sex-ratio of Nile tilapia, Oreochromis niloticus in Wadi Hanifah, Riyadh, Saudi Arabia. World J Zool. 2013;8:106-9. 
  23. Munguti JM, Nairuti R, Iteba JO, Obiero KO, Kyule D, Opiyo MA, et al. Nile tilapia (Oreochromis niloticus Linnaeus, 1758) culture in Kenya: emerging production technologies and socio-economic impacts on local livelihoods. Aquac Fish Fish. 2022;2:265-76.  https://doi.org/10.1002/aff2.58
  24. Murua H, Rodriguez-Marin E, Neilson JD, Farley JH, JuanJorda MJ. Fast versus slow growing tuna species: age, growth, and implications for population dynamics and fisheries management. Rev Fish Biol Fish. 2017;27:733-73.  https://doi.org/10.1007/s11160-017-9474-1
  25. Nehemia A, Maganira JD, Rumisha C. Length-weight relationship and condition factor of tilapia species grown in marine and fresh water ponds. Agric Biol J N Am. 2012;3:117-24.  https://doi.org/10.5251/abjna.2012.3.3.117.124
  26. Njiru M, Ojuok JE, Okeyo-Owuor JB, Muchiri M, Ntiba MJ, Cowx IG. Some biological aspects and life history strategies of Nile tilapia Oreochromis niloticus (L.) in Lake Victoria, Kenya. Afr J Ecol. 2006;44:30-7.  https://doi.org/10.1111/j.1365-2028.2006.00610.x
  27. Pena-Mendoza B, Gomez-Marquez JL, Salgado-Ugarte IH, Ramirez-Noguera D. Reproductive biology of Oreochromis niloticus (Perciformes: Cichlidae) at Emiliano Zapata dam, Morelos, Mexico. Rev Biol Trop. 2005;53:515-22.  https://doi.org/10.15517/rbt.v53i3-4.14666
  28. Shoko AP, Limbu SM, Mrosso HDJ, Mgaya YD. Reproductive biology of female Nile tilapia Oreochromis niloticus (Linnaeus) reared in monoculture and polyculture with African sharptooth catfish Clarias gariepinus (Burchell). Springerplus. 2015;4:275. 
  29. Stauffer JR Jr, Chirwa ER, Jere W, Konings AF, Tweddle D, Weyl O. Nile Tilapia, Oreochromis niloticus (Teleostei: Cichlidae): a threat to native fishes of Lake Malawi? Biol Invasions. 2022;24:1585-97.  https://doi.org/10.1007/s10530-022-02756-z
  30. Teame T, Zebib H, Meresa T. Observations on the biology of Nile tilapia, Oreochromis niloticus L., in Tekeze Reservoir, Northern Ethiopia. Int J Fish Aquac. 2018;10:86-94.  https://doi.org/10.5897/IJFA2017.0637
  31. Tegegnie ME. Impacts of fish introduction on aquatic environment: a study with special reference to common Carp/Cyprinus carpio (Linnaeus, 1758). J Agric Environ Sci. 2015;1:1-14. 
  32. Tesfaye G, Tadesse Z. Length-weight relationship, Fulton's condition factor and size at first maturity of tilapia, Oreochromis niloticus L. in lakes Koka, Ziway and Langano (Ethiopian rift valley). Ethiop J Biol Sci. 2008;7:139-57. 
  33. Tesfaye G, Wolff M. The state of inland fisheries in Ethiopia: a synopsis with updated estimates of potential yield. Ecohydrol Hydrobiol. 2014;14:200-19.  https://doi.org/10.1016/j.ecohyd.2014.05.001
  34. Tessema A, Getahun A, Mengistou S, Fetahi T, Dejen E. Lengthweight relationship, conditon factor, and some reprductive aspects of Nile tilapia (Oreochromis niloticus) in Lake Hayq, Ethiopia. Int J Fish Aquat Stud. 2019;7:555-61. 
  35. Wagaw S, Enawgaw Y, Aba Bulgu A, Wosnie A, Sisay A, Teklemariam A, Tegod D. Biometric assessment and reproductive biology of common carp (Cyprinus carpio var. communis) in Lake Arekit, Ethiopia: fish management implication. Cogent Food Agric. 2024;10:2307667. 
  36. Wagaw S, Mengistou S, Getahun A. Aspects of the growth and reproductive biology of Oreochromis niloticus (Linnaeus, 1758) in a tropical Soda Lake, Lake Shala, Ethiopia. Fish Aquat Sci. 2022;25:380-9.  https://doi.org/10.47853/FAS.2022.e34
  37. Wondie A. Improving management of shoreline and riparian wetland ecosystems: the case of Lake Tana catchment. Ecohydrol Hydrobiol. 2010;10:123-31.  https://doi.org/10.2478/v10104-011-0017-4
  38. Yeldan H, Avsar D. A preliminary study on the reproduction of the rabbitfish (Siganus rivulatus (Forsskal, 1775)) in the northeastern Mediterranean. Turk J Zool. 2000;24:173-82.