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Turkish Journal of Fisheries and Aquatic Sciences 2001, Vol 1, Num, 1     (Pages: 53-57)

Serum Ionic Content of Endemic Chalcalburnus tarichi During Spawning, Prespawning and Postspawning Terms, Living in Highly Alkaline Waters of Lake Van (pH 9.8), Turkey

Muhammed Arabacı 1 ,Haşmet Cağırgan 2 ,Mustafa Sarı 1 ,Ramazan Şekeroğlu 3

1 Agriculture Faculty, Yüzüncü Yıl University, Van, Turkey
2 Fisheries Faculty, Ege University, Izmir, Turkey
3 Medicine Faculty, Yüzüncü Yıl University, Van, Turkey
Viewed : 1877 - Downloaded : 1604 In this study, serum inorganic ion values of the endemic cyprinid Chalcalburnus tarichi, the only fish species living in highly alkaline Lake Van and migrating to freshwater rivers for spawning, were determined during spawning, prespawning, and postspawning terms.

A decrease in serum Na+, K+, Cl-, Ca, Mg++, Pi concentrations were observed in C. tarichi migrating to freshwater rivers for spawning. Serum ion composition of C. tarichi living in Lake Van resembles that of many marine teleost species except high serum Na+ value, but it seems likely that osmoregulatic pathways are different. Similarities in the decrease of serum inorganic ion concentrations in spawning migration in C. tarichi with anadromous fish were detected, and C. tarichi has high osmoreguletory capacity compering to other fishes. Keywords : Chalcalburnus tarichi, spawning migration, serum ionic content