Growth and mortality parameters of Caspian kutum, Rutilus kutum, in southern Caspian Sea

Reza Shahifar, Rahman Patimar, Hasan Fazli, Hadi Raeisi, Mohammad Gholizadeh, Hojjatallah Jafaryan

Abstract

The Caspian Kutum, Rutilus frisii, is one of the endemic and most important commercial cyprinid species in the southern Caspian Sea. A detailed study on growth and mortality parameters of this species was conducted based on 700 samples collected from commercial catches of beach seining in Guilan and Mazanderan provinces during fishing season 2017-2018. Females were dominated in both studied populations. Size frequency distributions showed significant variation among same sexes and between different sexes. The different WLRs were observed, positive allometric in Mazanderan, and negative allometric in Guilan. There were significant differences in growth parameters between sexes, females were of much greater asymptotic length than males, while the male fish had a higher growth rate and attained a smaller theoretical L size than females. The theoretical maximum length (L) was larger than the maximum one recorded during sampling. Based on the Bhattacharya method, the Caspian kutum from Guilan fishing grounds was more diverse, and included nine cohorts, while the population from Mazanderan Province showed only six cohorts. The linearized catch curve based on age composition data showed that total mortality rates (Z) are 1.32 year-1 and 0.63 year-1 for males and females of Guilan, respectively, that of males in Mazanderan is 1.04 year-1 and of females 0.86 year-1. The natural mortality rates (M) were 0.48 year-1 for males and 0.26 year-1 females in Guilan, and was found to be as 0.26 year-1 and 0.45 year-1 for males and females of Caspian kutum caught in Mazanderan. The exploitation ratio (E) was found to be higher than 0.5 for both sexes from Guilan, and to be lower than the expected optimum level of exploitation in Caspian kutum males and females caught in Mazanderan.

Keywords

Kutum, L-infinity, Total mortality, Natural mortality, Caspian Sea.

Full Text:

PDF

References

Abdolmaleki S., Hashemi A., Nahrvar R. (2007). Status of fishery and population structure of (Rutilus frisii kutum) in Iranian coast of Caspian Sea. Journal of Marine Science and Technology, 6(3-4): 51-62. (In Persian)

Aghili K., Mohamadi F. (2011). Investigation of catch, age and length composition of Kutum in Gorgan bay. Journal of Life Science-Lahijan Branch of Islamic Azad University, 5(4): 89-98. (In Persian)

Bagenal T.B., Tesch F.W. (1978). Age and growth. In: Methods for assessment of fish production in fresh waters. IBP Handbook No. 3. In: T. Bagenal (Ed.). Blackwell Scientific Publications, Oxford. pp: 101-136.

Beverton R.J.H. (1992). Patterns of reproductive strategy parameters in some marine teleost fishes. Journal of Fish Biology, 41(Supplement B): 137-160.

Beverton R.J.H., Holt S.J. (1959). A review of the life-spans and mortality rates of fish in nature, and their relationship to growth and other physiological characteristics. CIBA Foundation Colloquia on Ageing, 54: 142-180.

Charnov E.L. (1993). Life History Invariants. Oxford University Press, London. 167 p.

Esmaeili H.R., Coad B.W., Mehraban H.R., Masoudi M., Khaefi R., Abbasi K., Mostafavi H., Vatandoust S. (2014). An updated checklist of fishes of the Caspian Sea basin of Iran with a note on their zoogeography. Iranian Journal of Ichthyology, 1(3): 152-184.

Esmaeili H.R., Sayyadzadeh G., Eagderi S., Abbasi K. (2018). Checklist of freshwater fishes of Iran. FishTaxa, 3(3): 1-95.

Farhang P., Eagderi S. (2019). Skeletal ontogeny of the caudal complex in Caspian kutum, Rutilus kutum (Kamensky, 1901) (Teleostei: Cyprinidae) during early development. Caspian Journal of Environmental Sciences, 17(2): 113-119.

Fazli H., Daryanabard Gh.R., Abdolmaleki Sh., Bandani Gh.A. (2013). Stock Management Implication of Caspian kutum (Rutilus frisii kutum Kamensky, 1901) in Iranian Waters of the Caspian Sea. Ecopersica: 1(2): 181-192.

Fazli H., Daryanabard G.R., Salmanmahiny A.R., Abdolmaleki Sh., Bandani Gh.A., Afraei Bandpei M.A. (2012). Fingerling release program, biomass trend and evolution of the condition factor of Caspian Kutum during the 1991-2011 period. Cybium, 36(4): 545-550.

Froese R. (2006). Cube law, condition factor and weight–length relationships: history, meta-analysis and recommendations. Journal of Applied Ichthyology, 22: 241-253.

Gayanilo F.C., Sparre P., Pauly D. (1994). The FAO-ICLARM Stock Assessment Tools (FiSAT) User's Guide. FAO Computerized Information Series (Fisheries), No. 6. Rome, FAO.

Ghaninezhad D., Abdolmaleki Sh., Bourani M., Pourgholami A., Fazli H., Abbasi K., Bandani G.A. (2004). Stock assessment of bony fishes in southern Caspian Sea. Fisheries Research of Guilan, Research Report. 151 p.

Gulland J.A. (1971). Fish resources of the ocean. Fishing New Books, London. 255 p.

Hasanpour S., Eagderi S., Hosseini S.V., Jafari Sayadi M.H. (2016). Histological and allometric growth analysis of eye in Caspian kutum, Rutilus kutum Kamensky, 1901 (Teleostei: Cyprinidae) during early developmental stages. International Journal of Aquatic Biology, 4(4): 295-300.

Hoseini H., Nejatkhah Manavi P., Fazli H. (2010). Age and growth parameters of kutum (Rutilus frisii kutum Kamenski, 1901) in Caspian Sea, Mazanderan Province. Journal of Animal Environment, 2(3): 17-24. (In Persian)

Keivany Y., Nezamoleslami A., Dorafshan S., Eagderi S. (2016). Length-weight and length-length relationships in populations of Garra rufa from different rivers and basins of Iran. International Journal of Aquatic Biology, 3(6): 409-413.

Kiabi B.H., Abdoli A., Naderi M. (1999). Status of the fish fauna in the South Caspian Basin of Iran. Zoology in the Middle East, 18(1): 57-65.

Mehanna S.F. (1996). A biological and dynamical study on fish population of Lethrinus mahsena in Gulf of Suez, Egypt. Ph.D. Thesis. Faculty of science. Zagazig University. Benha branch. Egypt.

Munro J.L., Pauly D. (1983). A simple method for comparing growth of fishes and invertebrates. ICLARM Fishbyote, 1(1): 5-6.

Patimar R., Ownagh E., Jafari N., Hosseini M. (2009). Intrabasin variation in allometry coefficients of Lenkoran Capoeta capoeta gracilis (Keyserling, 1861) in the Gorganroud basin, southeast Caspian Sea, Iran. Journal of Applied Ichthyology, 25(6): 776-778.

Pauly D. (1983). Length-converted catch curves: a powerful tool for fisheries research in the tropics (Part I). Fishbyte, 1: 9-13.

Pauly D., Munro J. L. (1984). Once more on comparison of growth fish and invertebrates. ICLARM Fishbyte, 2(1): 21.

Powell D.G. (1979). Estimation of mortality and growth parameters from the length frequency of a catch [model]. Rapports et Proces-Verbaux des Reunions (Denmark).

Ricker W.E. (1975). Computation and interpretation of biological statistics of fish population. Bulletin of the Fisheries Research Board of Canada, 191: 1-382.

Roff D.A. (1983). An allocation model of growth and reproduction in fish. Canadian Journal of Fisheries and Aquatic Sciences, 40: 1395-1404.

Sparre P., Venema S.C. (1992). Introduction to tropical fish stock assessment. Part 1. Manual. FAO Fisheries Technical Paper no 306. (Rev. 1). FAO, Rome. 376 p.

Sparre P., Ursin E., Venema S.C. (1989). Introduction to tropical fish stock assessment-Part 1: manual. FAO Fisheries Technical Paper, No. 306 (1).

Sokal F.J., Rohlf R.R. (1981). Statistical tables. San Francisco: W.H. Freeman. 219 p.

Stergiou K.I. (2000). Life-history patterns of fishes in the Hellenic Seas. Web Ecology, 1: 1-10.

Wetherall J.A., Polovina J.J., Ralston S. (1987). Estimating growth and mortality in steady-state fish stocks from length-frequency data. ICLARM, 13: 53-74.

Refbacks

  • There are currently no refbacks.