Investigation of reproductive biology of Capoeta gracilis (Keyserling, 1861) in Zav River Golestan of National Park

Document Type : Biology(Animal)

Authors

Department of Fisheries, Gonbad-e-Kavus University, Gonbad-e-Kavus, Iran, POBox: 163

Abstract

To study the biological characteristics of Capoeta gracilis with 171 fish samples that obtained in December 2015 to May 2016 Electroshocker devices.  Sex ratio of male to female was 1.67:1 that showed significant difference between sex ration of male to female in population (X2 = 6.211, p < 0.05).  Maximum total length and weight were 199 mm and 122.43 g for females, 191 mm 93.37 g for males. The weight - length relation of female was W = 0.0097 TL3.11 (r2 = 0.99) and the weight - length relation of male was W = 0.0142 TL2.94 (r2 = 0.99) and the total relation was W = 0.0124 TL3.00 (r2 = 0.99). The results showed positive allometric growth for female and  negative allometric growth for male and  Isometric growth for the population (t-test, tmale= 2.09, tfemale = 2.77, tpopulation= 0.09, p < 0.05). Average absolute fecundity was 17978.11, while relative fecundity (eggs/g) were 1434.06. Eggs diameters were ranged from 0.10 to 0.98 mm with a mean value of 0.44 mm. The highest mean Gonadosomatic for females and for males in April was observed in June, 4.75 and 7.51 for female and male respectively.

Keywords


  1. Abdoli, A.; Rasooli, P. and Mostafavi, H., 2008. LengthWeight relationships of Capoeta capoeta gracilis in the Gorganroud River south Caspian Bacin. Journal of Applid Ichthyology. Vol. 24, No. 1, pp: 96-98.
  2. Bagenal, T. and Tesch, F., 1978. Methods for Assessment of Fish Production in Fresh Waters. IBP Handbook 3 Blackwell, Oxford. pp: 101-136.
  3. Burrough, R.J. and Kennedy, C.R., 1979. The occurrence and natural alleviation of stunting in a population of roach, Rutilus rutilus. Journal of Fish Biology. Vol. 15, pp: 93-109.
  4. Biswas, S.P., 1993. Manual of methods in fish biology. Asian Publishers. Pvt.Ltd. 157 p.
  5. Beverton, R.J.H., 1992. Patterns of reproductive strategy parameters in some marine teleost fishes. Journal of Fish Biology. Vol. 41, pp: 137-160.
  6. Darvish Sefat, A., 2006. Atlas of protected areas of Iran. Department of the Environment, Iran. 157 p.
  7. Froese, R. and Binohlan, C., 2000. Empirical relationships to estimate asymptotic length, length at first and length at maximum yield per recruit in fishes, with a simple method to evaluate length frequency data. Journal of Fish Biology. Vol. 56, pp: 758:773.
  8. Patimar, R.; Hajili Davaji, A.J. and Jorjani, A., 2011. Life History of Lenkron Capoeta capoeta gracilis in the Atrak River, Northern Iran. J of Life Sciences. Vol. 5, pp: 257-264.
  9. Patimar, R.; Ownagh, E.; Jafari, N. and Hoseini, M., 2009. Intrabasin variation in allometry ents of Lenkoran Capoeta capoeta gracilis in the Gorganroud basin southeast Caspian Sea Iran. Journal of Applid Ichthyology. Vol. 25, pp: 776-778.
  10. Pauly, D. and Munro, J.L., 1984. Once more on the comparison of growth in fish and vertebrates. ICLARM Fishbyte. Vol. 2, No. 1, 21 p.
  11. Pauly, D., 1984. Fish population dynamics in tropical waters. A manual for use with programmable calculators. ICLARM studies and reviews (Manila). Vol. 8, pp: 1-325.
  12. Przybylski, M., 1996. Variation in fish growth characteristics along a river course. Hydrobiologia. Vol. 325, pp: 39-46.
  13. Sparre, P. and Venema, S.G., 1992. Introduction to tropical fish stock assessment part 1. FAO Fisheries Technical Paper No. 306.1, Rev. 2. Rome, FAO. 407 p.
  14. Turkmen, M.; Erdogan, O.; Yeldirim, A. and Akyurt, I., 2001. Reproduction tactics, age and growth of Capoeta capoeta umbla Heckle 1843 from the Akkale region of the Karasu River, Turkey. Fisheries Research. Vol. 1220, pp: 1-12.
  15. Zivkov, M., 1996. Critique of proportional hypotheses and methods for back calculation of fish growth. Environmental Biology of Fishes. Vol. 46, pp: 309-320.
  16. Vollestad, L.A. and L'Bee-Lund, J.H., 1990. Geographic variation in life-history strategy of female roach Rutilus rutilus (L.). Journal of Fish Biology. Vol. 37, pp: 853-864.