Marwa Mohamed Ali Ibrahim Saleh
Asst. Professor
Possibility mitigation of cold stress in Nile tilapia under biofloc system by dietary propylene glycol: Performance feeding status, immune, physiological responses and transcriptional response of delta-9-desaturase gene
Aquaculture • 2021
Publication Information
Authors
Mohamed R Soaudy, Eman Y Mohammady, Mohamed A Elashry, Marwa M Ali, Nasr M Ahmed, Mahmoud H Hegab, Hoda AS El-Garhy, Ehab R El-Haroun, Mohamed S Hassaan
Keywords
Not Available
Journal
Aquaculture
Publisher
Elsevier
Volume
538
Issue
Not Available
Pages
Not Available
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
This trial was conducted to study the ability of dietary propylene glycol to mitigate winter stress of Nile tilapia under biofloc system. Nile tilapia (average initial weight = 28.50 ± 0.25 g) were fed three isonitrogenous (257.75 g kg−1 crude protein) diets for 47 days in winter season. The first diet was free added with propylene glycol (PG) control. The other two diets were supplemented with 5 mL and 7.5 mL PG kg−1 diet, respectively. At the end of feeding trial, the highest survival rate (P < 0.05) was observed in tilapia fed the diet supplemented with 7.5 ml PG kg−1 diet. A linear response in weight gain (WG; P = 0.034), specific growth rate (SGR; P = 0.041) and protein efficiency ratio (PER; P = 0.038) of tilapia were found by the increase in the PG levels in diets. The supplemental diets with PG did not induce any significant differences (P > 0.05) on feed conversion ratio (FCR) and feed intake (FI) of fish. The activities of …