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:: Volume 7, Issue 1 (2020) ::
2020, 7(1): 91-104 Back to browse issues page
Optimum dietary protein requirement of Paradise fish, Macropodus opercularis based on growth and reproduction performances
Sh. Dadgar *, A.R. Ghaedi, M. Hafezieh, D. Zargham
Abstract:   (160 Views)
The aim of this study was to assess the effects of dietary protein levels on growth and reproduction performance of paradise fish, Macropodus opercularis. A total of 540 fish (0.5±0.01 g) was offered one of six experimental diet comprising different protein levels (i.e., 25, 30, 35, 40, 45 and 50 %). Diet of 40 % crude protein produced significantly higher mean weight gain, daily growth rate, and specific growth rate and feed conversion ratio (p≤0.01). The analysis made based on the second order polynomial regression curve (R2=0.79), revealed that optimum protein levels based on fish SGR and FCR were 40 and 45 %, respectively. The average total egg production increased with increasing dietary protein levels up to 45 %. There was no significant difference in the egg diameter among groups, but egg hatchability was significantly higher (96%±2) in the fish fed diet containing 45% protein. The highest and lowest GSI was obtained in the 45 and 25% dietary protein, respectively. Fecundity was highest in the fish fed diet containing 45% (107.4±12.1) and followed by 50 (91.4±8.5) and 40 (68.5±2.6) % dietary protein. There were no significant effects of dietary protein level on egg biochemical composition and amino acid profile. The results suggest optimum dietary protein levels of 40 and 45 % for maximum growth and reproduction performance in paradise fish, respectively.
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Type of Study: Research | Subject: Ecology and Stock assessment
Received: 2020/08/4 | Accepted: 2020/07/20 | Published: 2020/07/20
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Dadgar S, Ghaedi A, Hafezieh M, Zargham D. Optimum dietary protein requirement of Paradise fish, Macropodus opercularis based on growth and reproduction performances. Survey in Fisheries Sciences. 2020; 7 (1) :91-104
URL: http://sifisheriessciences.com/article-1-170-en.html


Volume 7, Issue 1 (2020) Back to browse issues page
Survey in Fisheries Sciences Survey in Fisheries Sciences
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