Population dynamics and management strategies for the invasive African Catfish Clarias gariepinus (Burchell, 1822) in the Western Ghats hotspot

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Kuttanelloor Roshni
Chelapurath Radhakrishnan Renjithkumar
Rajeev Raghavan
Neelesh Dahanukar
Ranjeet Kutty


The African sharp-tooth catfish, Clarias gariepinus has caused significant negative impacts on freshwater biodiversity, especially in the developing world. An assessment of the demographics of an invasive C. gariepinus population from a freshwater Alliance for Zero Extinction (AZE) site in Southern India, revealed high growth rate, low fishing mortality and year-round recruitment as major driving factors aiding its successful establishment. Modelling of population dynamics using virtual population analysis and yield per recruit suggests that, while capturing larger individuals can help reduce population, eradication of the species is possible only by targeting small-sized, immature fish (<10 cm).

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Abdulkarim, M., Z.A. Yusuf, B.L. Musa & A.G. Ezra (2009). Population Parameters of Clarias gariepinus (cat fish) in Gubi dam, Bauchi State, Nigeria. Journal of Animal and Plant Sciences 5: 531–538.

Booth, A.J., G.R.L. Traasg & O.L.F. Weyl (2010). Adult African sharptooth catfish, Clarias gariepinus, population dynamics in a small invaded warm-temperate impoundment. African Zoology 45: 299–308. https://doi.org/10.3377/004.045.0208 DOI: https://doi.org/10.3377/004.045.0208

Clay, D. (1984). Production of the African Catfish (Clarias gariepinus) I. Growth, Mortality and Yield South of the Zambezi. Journal of Limnological Society of South Africa 10: 16–24.

Dahanukar, N., R. Raghavan, A. Ali, R. Abraham & C.P. Shaji (2011) The status and distribution of freshwater fishes of the Western Ghats. Chapter 3, pp. 21–48. In: Molur, S., K.G. Smith, B.A. Daniel & W.R.T. Darwall (eds.). The status and distribution of freshwater biodiversity in the Western Ghats, India. Cambridge, UK and Gland, Switzerland: IUCN, and Coimbatore, India: Zoo Outreach Organisation, 116pp.

Dudgeon, D., A.H. Arthington, M.O. Gessner, Z. Kawabata, D.J. Knowler, C. Le´ veˆque, R.J. Naiman, A. Prieur-Richard, D. Soto, M.L.J. Stiassny & C.A. Sullivan (2006). Freshwater biodiversity: importance, threats, status and conservation challenges. Biological Review 81: 163–182. https://doi.org/10.1017/S1464793105006950 DOI: https://doi.org/10.1017/S1464793105006950

Froese, R. (2006). Cube law, condition factor and weight–length relationships: History, meta-analysis and recommendations. Journal of Applied Ichthyology 22: 241–253. https://doi.org/10.1111/j.1439-0426.2006.00805.x DOI: https://doi.org/10.1111/j.1439-0426.2006.00805.x

Gayanilo, F.C., P. Sparre & D. Pauly (2005). The FAO-ICLARM Stock-Assessment Tools II (FiSAT II). User’s guide. Revised version. FAO Computerized Information Series (Fisheries) No 8. FAO, Rome, 168pp

GISD (2020). Species profile: Clarias gariepinus. http://www.iucngisd.org. Downloaded on 16 February 2020.

Gulland, J.A. (1970). The fish resources of the ocean. FAO Fisheries Technical Paper No. 97, 255pp.

Hammer, Ø., D.A.T. Harper & D.R. Paul (2001). Past: paleontological statistics software package for education and data analysis. Palaeontologia Electronica 4: 1–9

Hilborn, R. & C.J. Walters (1992). Quantitative Fisheries Stock Assessment. Springer, Boston, 570pp. DOI: https://doi.org/10.1007/978-1-4615-3598-0

Hossain Y.M., A.M. Hossen, M.M. Islam, N.U.M. Pramanik, F. Nawer, A.K. Paul, H.M.A. Hameed, M. Rahman, G. Kaushik & S. Bardoloi (2016). Biometric indices and size at first sexual maturity of eight alien fish species from Bangladesh. Egyptian Journal of Aquatic Research 42: 331–339. https://doi.org/10.1016/j.ejar.2016.09.001 DOI: https://doi.org/10.1016/j.ejar.2016.09.001

IUCN (2019). The IUCN Red List of Threatened species. Version 2018-2. htttp://www.iucnredlist.org. Downloaded on 18 February 2020.

Kadye, W.T. & A.J. Booth (2012). Integrating stomach content and stable isotope analyses to elucidate the feeding habits of non-native sharptooth catfish Clarias gariepinus. Biological Invasions 14: 779–795. https://doi.org/10.1007/s10530-011-0116-6 DOI: https://doi.org/10.1007/s10530-011-0116-6

Kwarfo-Apegyah, K. & P.K. Ofori-Danson (2010). Spawning and recruitment patterns of major fish species in Bontanga Reservoir, Ghana, West Africa. Lakes & Reservoirs: Science, Policy and Management for Sustainable Use 15: 3–14. https://doi.org/10.1080/10402381.2019.1616340 DOI: https://doi.org/10.1080/10402381.2019.1616340

Macharia, S., G.O. Obwoyere, B.K. Kirui & J.O. Manyala (2017). Assessment of catfish (Clarias gariepinus) stock in Lake Baringo, Kenya. Lakes & Reservoirs: Science, Policy and Management for Sustainable Use 22: 48–55. https://doi.org/10.1111/lre.12160 DOI: https://doi.org/10.1111/lre.12160

Molur, S. & R. Raghavan (2014). Prioritizing freshwater fish conservation in Western Ghats Hotspot: alliance for Zero Extinction (AZE) sites, p. 23. In: Juffe-Bignoli, D., S. Bhatt, S. Park, A. Eassom, E.M.S. Belle, R. Murti, C. Buyck, R.A. Raza, M. Rao, E. Lewis, B. MacSharry & N. Kingston (eds.) Asia Protected Planet Report 2014. UNEP-WCMC, Cambridge, 67pp

Moreau, J. & F.X. Cuende (1991). On improving the resolution of the recruitment patterns of fishes. Fishbyte 9: 45–46.

Okogwu, O.I. (2011). Age, growth and mortality of Clarias gariepinus (Siluriformes: Clariidae) in the Mid-Cross River-Floodplain ecosystem, Nigeria. Revista de Biologia Tropical 59: 1707–1716.

Pauly, D. (1980). On the interrelationships between natural mortality, growth parameters and mean environmental temperature in 175 fish stocks. J de Conseil int pour l’Exploration de la Mer 39: 175–192.

Pauly, D. (1984). Fish population dynamics in tropical waters: A manual for use with programmable calculators. ICLARM Studies and Reviews 8: 325.

Pauly, D. & J.L. Munro (1984). Once more on the comparison of growth in fish and invertebrate. ICLARM Fish Byte 2: 21.

Pillai, P.M., K. Prasannan, S. Raj & A.B. Kumar (2016). Length-Weight relationship and condition factors of the African catfish, Clarias gariepinus (Burchell, 1822) in Mattupetty reservoir, southern Western Ghats, Kerala, India. Journal of Aquatic Biology and Fisheries 4: 81–88.

Raghavan, R., S. Das, P.O. Nameer, A. Bijukumar & N. Dahanukar (2016). Protected areas and imperilled endemic freshwater biodiversity in the Western Ghats Hotspot. Aquatic Conservation: Marine and Freshwater Ecosystems 26: 78–90. https://doi.org/10.1002/aqc.2653 DOI: https://doi.org/10.1002/aqc.2653

Strayer, D.L. & D. Dudgeon (2010). Freshwater biodiversity conservation: recent progress and future challenges. Journal of North American Benthological Society 29: 344–358.

Tesfaye, G. & M. Wolff (2015). Stock assessment of fishery target species in Lake Koka, Ethiopia. Revista de Biologia Tropical 63: 755–770.

Thomas, K.R., C.R. Biju, C.R. Ajithkumar & M.J. George (1999). Ichthyofauna of Eravikulam National Park with notes on Trout culture in Rajamalai, Munnar, Kerala. Journal of Bombay Natural History Society 96: 199–202.

Weyl, O.L.F., V.S. Daga, B.R. Ellender & J.R.S. Vitule (2016). A review of Clarias gariepinus invasions in Brazil and South Africa. Journal of Fish Biology 89: 386–402. https://doi.org/10.1111/jfb.12958 DOI: https://doi.org/10.1111/jfb.12958

Wudneh, T. (1998). Biology and Management of Fish Stocks in Bahir Dar Gulf, Lake Tana, Ethiopia. PhD Thesis. Wageningen University, The Netherlands, 143pp.

Zar, J.H. (1999). Biostatistical analysis. Upper Saddle River. Prentice Hall, NJ, 622pp.

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