The effect of fish and rapeseed oils on growth performance, egg fatty acid composition and offspring quality of sterlet sturgeon (Acipenser ruthenus)

Abstract

The aim of this study was to evaluate the long‐term effects (7‐month experiment) of diets consisting of fish oil (Kilka fish) and vegetable oil (rapeseed) on the reproductive performance of sterlet sturgeon (Acipenser ruthenus) broodstock. Forty‐five broodstock (990.3 ± 20.05 g) were randomly allocated to three different diet treatments. Three experimental diets were formulated with graded levels of fish oil (100% FO), vegetable oil (100% VO), and a combination of fish and vegetable oil (50% FO + 50% VO). At the end of the 7‐month feeding trial period, the weight gain and final weight were changed significantly different between the treatments (p < 0.05). Broodstock fed the FO + VO diet had higher growth than those fed the only FO or VO diets (p < 0.05). The highest germinal vesicle migration percentage was observed in FO + VO treatment (p < 0.05). The DHA/EPA, DHA/ARA and EPA/ARA ratios in oocyte exhibited a significant difference in the different treatments (p < 0.05). This study indicates that nutrition of broodstock with diet including FO + VO (p < 0.05) can positively affect the growth performance of larvae compared with only FO or VO diets. Furthermore, the high levels of 18:1n‐9, AL and ALA contents in oocytes from broodstock fed VO and the lowest ALA content in oocytes from broodstock fed FO underlined the important role of broodstock diets in the reproductive process and embryonic and/or larval developments of sterlet.

Effects of different dietary canola and fish oil levels on overall performance, fatty acid profile, haemato‐biochemical responses, and digestibility of macronutrients of Caspian brown trout ( Salmo trutta caspius Kessler) fingerling

“…The remaining constant ARA levels in the carcass from fish fed different oil content in all experimental dietary treatments underline the possibility of the selective uptake and retention of ARA and its value for the metabolism and developing Caspian brown trout fingerlings. The previous findings on the importance and function of ARA for egg and larvae development and its selectively incorporate in various species of fish support this idea (Masoudi Asil et al, 2017; Pourhosein‐Sarameh, Bahri, Falahatkar, et al, 2019; Pourhosein‐Sarameh, Bahri, Salarzadeh, et al, 2019). Moreover, in our study, given that the highest and lowest n‐3/n‐6 ratios were observed in fingerlings fed HF and HV, respectively.…”

“…One more considerable observation from our study was that the fingerlings fed 100% FO diet had the lowest protein efficiency than fingerlings fed HV, FV, and FF diets. It is documented that a diet containing various FA profiles can induce various effects on aspects of fish lipid metabolism such as FA digestibility, depositional and/or absorption processes, catabolism, FA uptake and transport, and so on (Pourhosein‐Sarameh, Bahri, Falahatkar, et al, 2019; Pourhosein‐Sarameh, Bahri, Salarzadeh, et al, 2019; Turchini et al, 2009). Besides, the inordinate amounts of lipid in diet could exert a diminution in the absorption efficiency of nutrition components or digestive enzyme activities (Zhao et al, 2015).…”

“…Nowadays, the increasing demand for FO in aquaculture practices is accompanied by decreasing fish sources in nature, which leads to the escalation of FO cost (Turchini et al, 2009; Yilmaz et al, 2016). Accordingly, there has recently developed a particular interest in applying of vegetable oil (VO) to replace FO in the aquafeed formulation (Abedian Kenari et al, 2011; Chen et al, 2020; Falahatkar et al, 2018; Pourhosein‐Sarameh et al, 2019; Pourhosein‐Sarameh et al, 2019). In numerous studies, researchers showed that it is feasible to substitute FO with VO in the fish diet without compromising health, growth performance, survival, digestive enzyme activities, and reproduction of fish (Agh et al, 2019; Castro et al, 2016; Reda et al, 2020; Sun et al, 2011).…”

Potassium diformate in the diet of sterlet sturgeon ( Acipenser ruthenus ): Zootechnical performance, humoral and skin mucosal immune responses, growth‐related gene expression and intestine morphology

“…7.0, Molecular Biology Insights Inc., Colorado, USA; Table 2). Further, the β-actin was used as an ideal housekeeping gene to normalize the gene expression levels of the selected genes based on its constant expression levels in A. ruthenus (Pourhosein Sarameh et al, 2019). The relative expression of the selected genes was measured with an iCycler iQ real-time PCR (Bio-Rad) using the WizPure qPCR master mix (Wizbio Solutions) as SYBR green fluorescent dye and gene-specific primers.…”

Vitamin E Ameliorates Impaired Ovarian Development, Oxidative Stress, and Disrupted Lipid Metabolism in Oreochromis niloticus Fed with a Diet Containing Olive Oil Instead of Fish Oil

“…Fish oil is an excellent lipid source for broodstock of fishes, including pearl gourami ( Trichogaster leeri ) [ 6 ] and gilthead seabream ( Sparus aurata ) [ 7 ], because of its high LC-PUFA content. Studies have shown that partial replacement of FO with OO or RO can promote the reproductive performance of tongue sole ( Cynoglossus semilaevis ) [ 8 ], Atlantic salmon ( Salmo salar ) [ 9 ], and sterlet sturgeon ( Acipenser ruthenus ) [ 10 ], although excessive replacement of FO was reported to decrease the reproductive performance of sterlet sturgeon [ 10 ]. However, little is known about the effects of dietary OO on the gonad development and reproduction of tilapia.…”