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Caspian whitefish, Rutilus frisii kutum Kamensky, 1901 a potential aquaculture candidate: study on the cumulative effects of salinity and temperature on culture performance
E Ahmadian , R Malekzadeh-Viayeh * , A Zahmatkesh
, r.malekzadeh@urmia.ac.ir
Abstract:   (2853 Views)
In this study, growth and survival of the Caspian whitefish, Rutilus frisii kutum, (mean weight 0.59±0.06g) have been estimated at different rearing salinities (0, 5 and 10‰) and temperatures (24 and 28˚C). Maximum fish weight gain (493.65±14.07%) and specific growth rate (SGR) (2.74±0.15%), and minimum feed conversion ratio (FCR) (1.66±0.06) were obtained at salinity of 5‰ and temperature of 24˚C. There were significant differences in fish weight and length gain between the two rearing temperatures at salinity of 10‰ and between salinities of 0 and 5‰ at 24˚C (p<0.05). However, salinity and temperature did not significantly affect fish survival. Factorial analysis of variance showed significant cumulative effects of salinity and temperature on fish weight and length gain, final weight and SGR (p<0.05). This study confirmed that optimization of salinity and temperature is crucial in rearing a new fish species. Caspian whitefish fingerlings can be grown well at 5‰ and 24˚C although, it is recommended that the effects of a broader range of environmental variables as well as feed items must also be examined.
Keywords: Caspian whitefish, Rutilus frisii kutum, Salinity, Temperature, Growth indices, Survival
Full-Text [PDF 431 kb]   (1053 Downloads)    
Type of Study: Orginal research papers | Subject: aquaculture
Received: 2012/11/28 | Accepted: 2014/12/14 | Published: 2015/08/5
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Ahmadian E, Malekzadeh-Viayeh R, Zahmatkesh A. Caspian whitefish, Rutilus frisii kutum Kamensky, 1901 a potential aquaculture candidate: study on the cumulative effects of salinity and temperature on culture performance. IJFS. 2015; 14 (3) :623-633
URL: http://jifro.ir/article-1-768-en.html


Volume 14, Issue 3 (7-2015) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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