Effects of tetraploidization on hatching, survival, growth performance and proximate composition in rainbow trout (Oncorhynchus mykiss)

Document Type : Full Research Paper

Authors

1 PhD Student, Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Iran

2 Associate professor, Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Iran.

3 Assistant professor, Department of Natural Resources, Isfahan University of Technology, Iran.

4 Assistant professor, Department of Fisheries, Faculty of Natural Resources, University of Kurdistan, Iran.

Abstract

The aim of this study was to assess the effects of Tetraploidy induction on survival, growth performance, body composition and fatty acids profile in rainbow trout. For this work, 8 female brood stock (1600±246 g) and 6 male brood stock (1393±186 g) with 4 years old mean age were used. Heat shock achieved 65 degree- hour after fertilization, for 10 min and in 28˚c. The results showed that the level of tetraploidization induction was 68.21±2% that determined via red blood cell measurement. The survival rates in tetraploid group were significantly (p<0.05) lower than those of diploid group. Growth performance was significantly higher in diploids as compared to triploids (p<0.05). Proximate compositions of fish including protein, fat and moisture content were affected by tetraploidization, compared to that of the diploids. The results showed that the survival rate in first development stage was decreased, as well as, the levels of saturated fatty acids decreased as an effect of tetraploid induction.

Keywords

References

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Veterinary Research & Biological Products
Volume 30, Issue 4
December 2017
Pages 231-240

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History

  • Receive Date: 14 January 2017
  • Revise Date: 07 March 2017
  • Accept Date: 07 March 2017

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