STUDY OF GONADOSOMATIC INDEX OF SALMO OHRIDANUS STEINDACHNER FROM OHRID LAKE
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Published:
Oct 1, 2017
Keywords:
Salmo ohridanus; gonadosomatic index
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Abstract
With the aim to investigate the gonadosomatic index of Ohrid belvica (Salmo ohridanus, Steindachner, 1892), investigations were conducted on individuals captured in vegetative and reproductive development period of belvica, on three localities of Ohrid Lake: Kalista, Kaneo and Elesec, on depth from 45 to 70 m. Samples for researching have average body mass from 90 to 100 g and average total body length from 217 to 225 mm. The gonadosomatic index is the ratio of fish gonads weight to the body weight. It was found that this ratio varies from 0.12 to 6.77 for the three localities during the two stages of development, or that is an average of 0.14 to 5.86. High gonadosomatic indеxes were recorded in the reproductive development period, which suggested the spawning period.
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References
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2. Chelkowski, Z. 1992. Biological characteristics of sea trout (Salmo trutta L.) smelts of known age from Osówka stream. Acta Ichthyologica et Piscatoria, Vol. XX, Fasc. 2, 107-122.
3. Czerniejewski, P., Filipiak, J., Poleszczuk, G., Wawrzyniak, W. 2004. Selected biological characteristics of the catch-available part of population of vendace, Coregonus albula (L.) from Lake Miedwie, Poland. Acta Ichthyologica et Piscatoria, 34 (2): 219-233.
5. Dziewulska, K., Domagala, J. 2003. Precocious males of cultured Atlantic salmon, Salmo salar L. in the second spawning season. Acta Ichthyologica et Piscatoria, Vol. XXXIII, Fasc. 2, 153-160.
6. Ghanbahadur, A. G., Ghanbahadur, G. R. 2012. Study of gonaosomatic index of fresh water fish Cyprinus carpio. Trends in Fisheries Research, Vol. 1, No. 1, 32-33.
7. Ghanbahadur, A. G., Ghanbahadur, G. R., Ganeshwade, R., Khillare, Y.K. 2013. Study of gonadosomatic index of fresh water fish Channa gachua. Science research Reporter, 3 (1):07-08.
8. Heese, T. 1990. Gonad development and fecundity of whitefish, Coregonus lavaretus (L. 17580 from the Pomeranian bay. Acta Ichthyologica et Piscatoria, Vol. XX, Fasc. 1, 3-12.
9. Jan, M., Ahmed, I. 2016. Assessment of fecundity, gonadosomatic index and hepatosomatic index of snow trout, Schizothorax plagiostomus in river Lidder, from Kashmir himalaya, India.
10. Jankovid, D. 1958. Ekologija dunavske kečige (Acipenser ruthenus L.). Biološki Institut N. R. Srbije, Knjiga 2, Beograd.
11. Kompowski, A. 1982. On some aspects of biology of bream, abramis brama (L., 1758) inhabiting the River Regalica and Lake Dabie. Acta Ichthyologica et Piscatoria, Vol. XII, Fasc. 1, 3-25
12. Karabanowicz, J., Kompowski, A. 1994. On biology of reproduction of blue bream, Abramis ballerus (L., 1758), in the lower part of River Odra, Lake Dabie and Szczecin Lagoon. Acta Ichthyologica et Piscatoria, Vol. XXIV, Fasc. 2, 77-92.
13. Kompowsk, A., Blaszczyk, P. 1997. Reproduction and fecundity of blue bream Abramis ballerus L., 1758 in Miedzyodrze. Acta Ichthyologica et Piscatoria, Vol. XXVII, Fasc. 2, 57-77.
14. Neja, Z., Kompowski, A. 2001. Some data on the biology of common bream, Abramis brama (L., 1758), from the Miedzyodrze waters. Acta Ichthyologica et Piscatoria, 31(1): 3-26.
15. Правдин, И.Ф. 1966. Рукпвпдствп пп изучению рыб. Издательствп „Пищевая прпмышленнпсть“, Мпсква, 1-373.
16. Rakaj, N., Flloko, A. 1995. Conservation status of freshwater fish of Albania. Biological Conservation, 72(2):195-199.
17. Rosch, R. 2000. Gonadosomatic Index (GSI) of Female Whitefish (Coregonus lavaretus) in Lake Constance. Limnologica, 30: 193-196.
18. Sadekarpawar, S., Parikh, P. 2013. Gonadosomatic and hepatosomatic indices of freshwater fish Oreochromis mossambicus in response to a plant nutrient. World journal of Zoology, 8 (1): 110-118.
19. Witkowski, A., Blachuta, J., kokurewicz, B., Kowalewski, M. 1989. Changes of gonadosomatic index (GSI) and egg diameter in the grayling Thymallus thymallus (L.) in annual cycle. Acta Ichthyologica et Piscatoria, Vol. XIX, Fasc. 2, 21-28.