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:: Volume 12, Issue 2 (4-2013) ::
IJFS 2013, 12 Back to browse issues page
Effects of starvation and re-feeding on compensatory growth performance, plasma metabolites and IGF-I gene expression of Persian sturgeon (Acipenser persicus, Borodin 1897)
M. Yarmohammadi * , A. Shabani , M. Pourkazemi , H. Soltanloo , M. R. Imanpour , S. Ramezanpour , C. Smith-Keune , D. R. Jerry
, Mahtabyarmohammadi@gmail.com
Abstract:   (12681 Views)
The effects of starvation and subsequent re-feeding on compensatory growth performance, blood serum metabolites and IGF-ImRNA expression in liver and muscle were investigated in juvenile Persian sturgeon. Growth indices including body weight, SGR, CF, and HSI significantly decreased after starvation. However, after re-feeding sturgeons that were starved for 1 week reached the same weight as the control, indicating that complete compensatory growth had occurred. Conversely, sturgeon in longer periods of starvation showed only partial growth compensation. HSI values decreased significantly during starvation, although they returned to the control fish levels after re-feeding. Plasma levels of glucose and insulin during starvation and re-feeding did not significantly change. This suggests that sturgeon is able to maintain glycaemia during starvation, probably due to their non-carbohydrates source dietary. Plasma total lipid level in un-fed treatments, however, was found to increase, possibly as a mechanism to utilise lipids as a fuel during starvation. IGF-I mRNA expression in liver and muscle increased during starvation and decreased after re-feeding. However, changes in the IGF-ImRNA expression were not significantly different among treatments. These results indicate that a periodic short-term starvation in Persian sturgeon does not adversely sacrifice overall fish weight gain and sturgeon can realise compensatory growth
Keywords: Persian sturgeon, Feeding regime, Compensatory growth, Blood metabolite
Full-Text [PDF 497 kb]   (3098 Downloads)    
Type of Study: Orginal research papers | Subject: Genetics
Received: 2013/05/14 | Accepted: 2013/06/2 | Published: 2013/06/2
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Yarmohammadi M, Shabani A, Pourkazemi M, Soltanloo H, Imanpour M R, Ramezanpour S, et al . Effects of starvation and re-feeding on compensatory growth performance, plasma metabolites and IGF-I gene expression of Persian sturgeon (Acipenser persicus, Borodin 1897). IJFS. 2013; 12 (2) :465-483
URL: http://jifro.ir/article-1-1003-en.html


Volume 12, Issue 2 (4-2013) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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