Effect of dietary fish and vegetable oil on the growth performance, body composition, fatty acids profile, reproductive performance and larval resistance in pearl gourami (Trichogaster leeri)

Abstract

This study investigated the effect of two lipid sources on reproduction performance and growth in pearl gourami. For this purpose, 180 fish (3.32 ± 0.25 g) were fed with three isoenergetic (19.80) and isonitrogenous diets (480 g/kg protein) including FO (80 g/kg fish oil), FS (40 g/kg fish oil and 40 g/kg soybean oil) and SO (80 g/kg soybean oil) for 10 weeks before maturation. At the end of the trial, there was no significant difference in weight gain, feed conversation ratio and body composition between fish fed FO and FS diets. Individuals fed dietary FO had significantly higher levels of n‐3 long‐chain polyunsaturated fatty acids in the muscle (130.5 g/kg lipid) and ovary (140.4 g/kg lipid) as compared with those fed SO diet (64.5, 103.6 g/kg, respectively) (p < .05). Feeding pearl gourami with FO and FS diets enhanced regarding absolute fecundity, relative fecundity, the fertilization rate, larvae total length and survival at 3 day posthatch (p < .05). Also, 17 beta‐estradiol in plasma of fish fed dietary FO (6.2 ng/L) was higher than those fed SO diet (1.7 ng/L) (p < .05). In conclusion, we suggest FS diet for broodstock nutrition of pearl gourami as a model for asynchronous multi‐batch spawning fish.

Effects of different forms of barberry root (Berberis vulgaris) on growth performance, muscle fatty acids profile, whole‐body composition, and digestive enzymes of rainbow trout (Oncorhynchus mykiss)

“…All procedures involving animals were performed according to the Tarbiat Modares University protocols, which seek to optimize handling and minimize animal suffering. The guidelines, adopted from the Declaration of Helsinki (1975) and The Society for Neuroscience Animal Care and Use guidelines (1998), were approved for implementation by the Medical Ethics Committee, School of Medical Sciences of Tarbiat Modares University, on the 28th Farvardin, 1385/17th April, 2006 (Ghosi Mobaraki, Abedian Kenari, Bahrami Gorji, & Esmaeili, 2020; Safavi, Abedian Kenari, Tabarsa, & Esmaeili, 2019; Tazikeh, Abedian Kenari, & Esmaeili, 2019). After 1 day of starvation, fish were sampled and weighted to measure growth performance.…”

The positive effects of taurine on growth performance, immunohaematological parameters and stress response of farmed beluga ( Huso huso ) in both fresh water and brackish water

“…Aquaculture has a high potential to provide food for humans in the next decades (Zaretabar et al, 2021). As the profitability of fish farming depends on growth performance and feed efficiency, any attitude towards improving these parameters can help increase sustainability (Asgari et al, 2020;Ghosi Mobaraki et al, 2020). An ideal diet for omnivorous fish species such as beluga (Huso huso) usually has 30%-40% fish meal and fish oil.…”

Responses of aquaculture fish to climate change‐induced extreme temperatures: A review

“…A recent study by Fei et al (2020) reported that dietary amino acids could enhance sex steroid hormone synthesis and growth performance of yellow catfish, Pelteobagrus fulvidraco . Dietary manipulation also improved physiology of African Catfish, Clarias gariepinus (Al‐Deghayem & Suliman, 2019), pearl gourami, Trichogaster leeri (Ghosi Mobaraki, Abedian Kenari, Bahrami Gorji, & Esmaeili, 2020), red seabream, Pagrus major (M. S. Hossain et al, 2019), butter catfish, Ompok pabda (G. Chowdhury et al, 2020) and amberjack, Seriola dumerili (S. Hossain et al, 2018). However, the use of endocrine therapy and a nutritional management approach as potential thermal mitigation measures to support natural gametogenesis is still unexplored.…”