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An increased understanding of fisheries target species population dynamics is a key requirement for successful management. Age, growth, and mortality of Indian mackerel, Rastrelliger kanagurta were estimated based on samples collected from commercial purse seine fishery in the Egyptian Red Sea between October 2019 and September 2020. The age estimates were based on two readers to increase the accuracy of results.  The age estimates, in the period of study, were observed at a maximum age for both sexes at 4 years old and the most sampled occurrences in the second years (2 years old). The von Bertalanffy growth function was estimated for males at L∞= 343.83-0.447 (t+0.474); for females at L∞= 367.37-0.357 (t+0.767) and combined at L∞= 353.78-0.406 (t+0.595). The mortality rate was determined at 1.35, 1.32 and 1.37 year-1 and exploitation ratio at 0.417, 0.511 and 0.492 year-1 for males, females and combined receptively. The length at first maturity (L50) was estimated at 206.9, 208.26 and 207.48 mm for males, females and combined receptively. The updated estimates of these biological parameters, by this study, indicate that R. kanagurta population is more vulnerable to fisheries exploitation than before.


Age-estimates Fish mortality Growth parameter Length-weight relationship von Bertalanffy.

Article Details

Author Biography

Yassein A.A. OSMAN, National Institute of Oceanography and Fisheries, Egypt.

How to Cite
OSMAN, Y. A., SAMY-KAMAL, M., & EL-MAHDY, S. M. (2021). Age, growth and mortality of Indian mackerel Rastrelliger kanagurta (Teleostei: Scombridae) in the Egyptian Red Sea coast. Iranian Journal of Ichthyology, 8(3), 236–249.


    Abdussamad, E.; Mohamad, H. & Achayya, P. 2006. Fishery and population characteristics of Indian mackerel, Rastrelliger kanagurta (Cuvier) at Kakinada. Indian Journal of Fisheries 53 (1): 77-83.
    Al-Mahdawi, G.J. & Mehanna, S. 2010. Stock assessment of the Indian mackerel Rastrelliger kanagurta (Cuvier, 1816) in the Yemeni coast of Red Sea, Al-Hodeidah Region. In Book Stock assessment of the Indian mackerel Rastrelliger kanagurta (Cuvier, 1816) in the Yemeni coast of Red Sea, Al-Hodeidah Region (Editor, ed.)^eds.), p. 220-230. Massive Conferences and Trade Fairs, City.
    Amin, A.M.; Sabrah, M.M.; El-Ganainy, A.A. & El-Sayed, A.Y. 2015. Population structure of Indian mackerel, Rastrelliger kanagurta (Cuvier, 1816), from the Suez Bay, Gulf of Suez, Egypt. International Journal of Fisheries and Aquatic Studies 3(1): 68-74.
    Amin, S.; Mohd, A.M.; Fatinah, S.; Arshad, A.; Rahman, M. & Jalal, K. 2014. Population Parameters of Rastrelliger kanagurta (Cuvier, 1816) in the Marudu Bay, Sabah, Malaysia. Iranian Journal of Fisheries Sciences 13(2): 262-275.
    Arrafi, M., Azmi, M., Rumeaida, M. & Muchlisin, Z. 2016. Biology of Indian mackerel, Rastrelliger kanagurta (Cuvier, 1817) in the western waters of Aceh. Iranian Journal of Fisheries Sciences 15(3): 957-972.
    Baty, F.; Ritz, C.; Charles, S.; Brutsche, M.; Flandrois, J.-P. & Delignette-Muller, M.-L. 2015. A toolbox for nonlinear regression in R: the package nlstools. Journal of Statistical Software 66(5): 1-21.
    Beamish, R. & Fournier, D. 1981. A method for comparing the precision of a set of age determinations. Canadian Journal of Fisheries and Aquatic Sciences 38(8): 982-983.
    Beverton, R.J. & Holt S.J. 1957. On the dynamics of exploited fish populations. Fishery Investigations, Series II, 19. London: Her Majesty's Stationary Office.
    Bhendarkar, M.; Naik, S.; Mohite, S. & Kulkarni, G. 2013. Reproductive Biology of Indian Mackerel, Rastrelliger Kanagurta (Cuvier, 1817) Off Ratnagiri Coast, Maharashtra, India. India Discovery Science 3(9).
    Campana, S.E. & Thorrold, S.R. 2001. Otoliths, increments, and elements: keys to a comprehensive understanding of fish populations?. Canadian Journal of Fisheries and Aquatic Sciences 58(1): 30-38.
    Chang, W.Y. 1982. A statistical method for evaluating the reproducibility of age determination. Canadian Journal of Fisheries and Aquatic Sciences 39(8): 1208-1210.
    Collette, B. 2001. Scombridae. Tunas (also, albacore, bonitos, mackerels, seerfishes, and wahoo). FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific 6: 3721-3756.
    Devaraj, M.; Fernandez, I. & Kamat, S. 1994. Dynamics of the exploited Indian mackerel Rastrelliger kanagurta stock along the southwest coast of India. Journal of the Marine Biological Association of India 36: 110-151.
    Dhulkhed, M. & Annigeri, G. 1983. On a record sized mackerel Rastreliger kanagurta caught off Karwar. Indian Journal of Fisheries 30(1): 183-184.
    DiBattista, J.D.; Roberts, M.B.; Bouwmeester, J.; Bowen, B.W.; Coker, D.J.; Lozano-Cortés, D.F.; Howard Choat, J.; Gaither, M.R.; Hobbs, J.P.A. & Khalil, M.T. 2016. A review of contemporary patterns of endemism for shallow water reef fauna in the Red Sea. Journal of Biogeography 43(3): 423-439.
    Froese, R. 2006. Cube law, condition factor and weight–length relationships: history, meta-analysis and recommendations. Journal of Applied Ichthyology 22: 241-253.
    Froese, R.; Winker, H.; Coro, G.; Demirel, N.; Tsikliras, A.; Dimarchopoulou, D.; Scarcella, G.; Palomares, M.; Dureuil, M. & Pauly, D. 2020. Estimating stock status from relative abundance and resilience. ICES Journal of Marine Science 77(2): 527-538.
    Froese, R.; Winker, H.; Coro, G.; Demirel, N.; Tsikliras, A.C.; Dimarchopoulou, D.; Scarcella, G.; Probst, W.N.; Dureuil, M. & Pauly, D. 2018. A new approach for estimating stock status from length frequency data. ICES Journal of Marine Science 75(6): 2004-2015.
    General Authority for Fish Resources Development (GAFRD 2020) 2018.: Ministry of Agriculture. Annual fishery statistics Report, Cairo, Egypt.
    Ghosh, S.; Rao, M.; Mahesh, V.; Satish Kumar, M.; Rohit, P. 2016. Fishery, reproductive biology and stock status of the Indian mackerel Rastrelliger kanagurta (Cuvier, 1817), landed along the north-east coast of India. Indian Journal of Fisheries 63(2): 33-41.
    Gulland, J. 1971. The Effect of Exploitation on the Numbers of Marine Animals: in Dynamics of Populations, p. 450-467. Centre for Agricultural Publishing and Documentation Wageningen.
    Gulland, J.A. 1966. Manual Of Sampling and Statistical Methods for Fisheries Biology.
    Hoenig, J.M. 1983. Empirical use of longevity data to estimate mortality rates. Fishery Bulletin 82: 898-903.
    Jayabalan, N.; Zaki, S.; Al-Marzouqi, A. & Al-Kiyumi, F. 2016. Stock assessment of the Indian mackerel Rastrelliger kanagurta (Cuvier, 1817) from Muscat coast, Oman. Indian Journal of Fisheries 63:28-34.
    Jones, G.P. 1984. The influence of habitat and behavioural interactions on the local distribution of the wrasse, Pseudolabrus celidotus. Environmental Biology of Fishes 10(1-2): 43-57.
    Kemp, J.A. 2000. Zoogeography of the coral reef fishes of the north-eastern Gulf of Aden, with eight new records of coral reef fishes from Arabia. Fauna of Arabia 18: 293-322.
    Kenchington, T.J. 2014. Natural mortality estimators for information‐limited fisheries. Fish and Fisheries 15(4): 533-562.
    Kuiter, R. & Tonozuka, T. 2001. Pictorial Guide to Indonesian Reef Fishes. Part 2. Fusiliers—Dragonets, Caesionidae—Callionymidae. Zoonetics: Australia 304-622.
    Le Cren, E.D. 1951. The length-weight relationship and seasonal cycle in gonad weight and condition in the perch (Perca fluviatilis). The Journal of Animal Ecology 201-219.
    Liang, C.; Xian, W.; Liu, S. & Pauly, D. 2020. Assessments of 14 exploited fish and invertebrate stocks in Chinese waters using the LBB method. Frontiers in Marine Science 7: 314.
    Mavruk, S. & Avsar, D.J. 2008. Non-native fishes in the Mediterranean from the Red Sea, by way of the Suez Canal. Reviews in Fish Biology and Fisheries 18(3): 251-262.
    McConnell, R. & Lowe-McConnell, R. 1987. Ecological studies in tropical fish communities. Cambridge University Press.
    Mehanna, S. 2001. Dynamics and management of the Indian mackerel Rastrelliger kanagurta (Cuvier, 1816) in the Gulf of Suez, Egypt. Egyptian Journal of Aquatic Biology and Fisheries 5(3): 179-194.
    Mehanna, S. 2011. Population dynamics and management of snubnose emperor Lethrinus bungus (L. borbonicus) from the Foul Bay, Red Sea. In INOC-XI International Symposium. 2011: 121-129.
    Nikolsky, G. 1963. The Ecology of Fishes. Academic Press London and NewYork. 351pp.
    Ogle, D.; Wheeler, P. & Dinno, A. 2018. FSA: fisheries stock analysis. R package version 0.8. 22. Retrived from https://github. com/droglenc/FSA.
    Ogle, D.H. 2016. Introductory fisheries analyses with R, CRC Press.
    Osman, A.A.Y.; Mansur, E.; El-Mahdy, S. & Mohammad, A. 2021. Age, growth and management of Amblygaster sirm (Walbaus, 1792) form the Red Sea, Egypt. Egyptian Journal of Aquatic Biology and Fisheries 25 (2): 819- 835.
    Osman, A.A.Y.; Mehanna, S.; El-Mahdy, S.; Mohammad, A. & Mahe, K. 2020. Age precision and growth rate of Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red Sea, Egypt. Egyptian Journal of Aquatic Biology and Fisheries 24: 341-352.
    Pauly, D. & Morgan, G. 1987. Length-Based Methods in Fisheries Research, WorldFish.
    Pauly, D. 1980. A new methodology for rapidly acquiring basic information on tropical fish stocks: growth, mortality and stock-recruitment relationships. A New Methodology for Rapidly Acquiring Basic Information on Tropical Fish Stocks: Growth, Mortality and Stock-Recruitment Relationships (eds.), pp. 154-172. Citeseer, City.
    Pauly, D. 1983. Length-converted catch curves: a powerful tool for fisheries research in the tropics (part 1). Fishbyte 1: 9-13.
    Pauly, D. 1984. Fish population dynamics in tropical waters: a manual for use with programmable calculators, WorldFish.
    Por, F.D. 2012. Lessepsian migration: the influx of Red Sea biota into the Mediterranean by way of the Suez Canal. Springer Science & Business Media.
    Rafail, S.Z. 1972. Studies of Red Sea fisheries by light and purse-seine near Al-Ghardaqa. Bulletin Institute of Oceanography and Fisheries (Cairo) 2: 25-49.
    Rahman, M. & Hafzath, A. 2012. Condition, length-weight relationship, sex ratio and gonadosomatic index of Indian mackerel (Rastrelliger kanagurta) captured from Kuantan coastal water. Journal of Biological Sciences 12(8): 426.
    Ricker, W.E. 1975. Computation and interpretation of biological statistics of fish populations. Bulletin - Fisheries Research Board of Canada 191: 1-382.
    Rohit, P.; Pillai, P.; Gupta, C.A. & Preetha, K. 1998. Fishery and population characteristics of mackerel landed by trawlers along the Dakshina Kannada coast. Indian Journal of Fisheries 45(1): 21-27.
    Samy, M.; Sánchez-Lizaso, J.L. & Forcada, A. 2011. Status of marine protected areas in Egypt. Animal Biodiversity and Conservation 34(1): 165-177.
    Samy-Kamal M. 2021. Prices in the Egyptian seafood market: Insights for fisheries management and food security. Fisheries Research 233: 105764.
    Samy-Kamal, M. 2015. Status of fisheries in Egypt: reflections on past trends and management challenges. Reviews in Fish Biology and Fisheries 25(4): 631-649.
    Samy-Kamal, M. 2020. Outlook on the fisheries policy reform in Egypt and the draft of the new fisheries law. Marine Policy 120: 104136.
    Sommer, C.; Schneider, W. & Poutiers, J.-M. 1996. The living marine resources of Somalia, Food & Agriculture Org.
    Then, A.Y.; Hoenig, J.M.; Hall, N.G.; Hewitt, D.A. & Jardim, H. 2015. Evaluating the predictive performance of empirical estimators of natural mortality rate using information on over 200 fish species. ICES Journal of Marine Science 72(1): 82-92.