Effects of selenium yeasts (Selemax, Selenosource and Sel-Plex) on survive, carcass composition and stress resistance in common carp (Cyprinus carpio)

Articles in Press

Document Type : Research Paper

Authors

Department of Fisheries, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran

10.22124/janb.2025.31290.1297

Abstract

Selenium (Se) has recently received considerable attention in aquatic nutrition. In this study, the effects of seven diets were studied in common carp including: 1- containing 0.3 mg Se from Selemax, 2- containing 1 mg Se from Selemax, 3- containing 0.3 mg Se from Selenosource, 4- containing 1 mg Se from Selenosource, 5- containing 0.3 mg Se from Sel-Plex, 6- containing 1 mg Se from Sel-Plex per kg of diet, and 7- a control diet without Se supplementation. Fish culture was carried out in 250-liters round tanks for 52 days. Each tank stocked with 31 fish with an initial weight of 1.61±0.32 g (mean ± SD). No significant differences were observed in terms of fish weight, standard length, and condition factor (P>0.05). Se yeasts had no significant effect on survival rate during the rearing period and carcass dry matter, crude protein and crude fat (P>0.05), but feeding with 0.3 mg of Se in the form of Selenosource caused a significant decrease in carcass ash percentage (P<0.01). After exposure to salinity stress and cessation of aeration (higher-intensity stress), no significant differences were observed in terms of fish survival time (P>0.05). However, after exposure to salinity stress combined with aeration (lower-intensity stress), significant increases in the survival time were observed in fish fed with 0.3 mg Se in the form of Selemax or Sel-Plex (P<0.05). Overall, the use of Selenosource in the diet of common carp is not beneficial and the use of Selmax or Sel-Plex at level of 0.3 mg of Se per kg of diet is recommended in order to increase the resistance to stress.

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Main Subjects

Aquatic Animals Nutrition

Articles in Press, Accepted Manuscript
Available Online from 09 October 2025

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