Endogenous biosynthesis of <i>n</i>-3 long-chain PUFA in Atlantic salmon

Mock, Thomas; Francis, David S.; Jago, Matthew K; Glencross, Brett; Smullen, Richard P.; Turchini, Giovanni M.

doi:10.1017/s0007114519000473

Cited by 13 publications

(9 citation statements)

References 88 publications

(164 reference statements)

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“…Based on observations from studies with a controlled production environment as well as short-term trials, some authors have suggested that the current commercial aquafeed formulations for salmon already include a physiological excess of EPA and DHA and that higher dietary levels do not significantly improve growth performance [34], [35]. It is important to consider the differences in experimental designs (fish size, life stage, trial duration, etc.…”

Section: Discussionmentioning

confidence: 99%

Increasing dietary levels of the n-3 long-chain PUFA, EPA and DHA, improves the growth, welfare, robustness and fillet quality of Atlantic salmon in sea cages

et al. 2022

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The present study evaluated the effects of increasing the dietary levels of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in Atlantic salmon (Salmo salar) reared in sea cages, in terms of growth performance, welfare, robustness, and overall quality. Fish with an average starting weight of 275 g were fed one of four different diets containing 10, 13, 16, and 35 g/kg of EPA and DHA (designated as 1.0%, 1.3%, 1.6%, and 3.5% EPA and DHA) until they reached approximately 5 kg. The 3.5% EPA and DHA diet showed a significantly beneficial effect on growth performance and fillet quality compared with all other diets, particularly the 1% EPA and DHA diet. Fish fed the diet containing 3.5% EPA and DHA showed 400-600 g higher final weights, improved internal organ health scores and external welfare indicators, better fillet quality in terms of higher visual colour score and lower occurrence of dark spots, and higher EPA and DHA content in tissues at the end of the feeding trial. Moreover, fish fed the 3.5% EPA and DHA diet showed lower mortality during a naturally occurring cardiomyopathy syndrome outbreak, although this did not reach statistical significance. Altogether, our findings emphasise the importance of dietary EPA and DHA to maintain good growth, robustness, welfare, and fillet quality of Atlantic salmon reared in sea cages.

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Section: Discussionmentioning

confidence: 99%

Increasing dietary levels of the n-3 long-chain PUFA, EPA and DHA, improves the growth, welfare, robustness and fillet quality of Atlantic salmon in sea cages

et al. 2022

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“…Moreover, in these studies, information is missing. For farmed fish, only in case of Atlantic salmon, a 283-day (d) grow-out period in recirculating aquaculture systems (RAS) is known [33], whereas farmed fish from unknown production systems were used in other studies [34][35][36]. All these information underline the importance of analyzing the physical fish flesh quality of a stress-free killed fish of diverse species that were grown in a controlled aquaculture production.…”

Section: Introductionmentioning

confidence: 99%

Determination and Comparison of Physical Meat Quality Parameters of Percidae and Salmonidae in Aquaculture

Komolka

Bochert²,

Franz

et al. 2020

Foods

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Although aquaculture has been the fastest growing food sector for decades, there are no standardized parameters for most of the fish species regarding physical meat quality. Therefore, this study provides for the first time an overview of the physical meat characteristics of the most important fish species of the German Baltic Sea coast. Traditional farmed salmonids (rainbow trout (Oncorhynchus mykiss) and maraena whitefish (Coregonus maraena) as well as two percids (European perch, Perca fluviatilis and pikeperch, Sander lucioperca) were utilized for this comparison. The results demonstrate that the meat of the salmonids is very analogous. However, the post mortem degradation process starts faster in trout meat. In contrast, the meat quality characteristics of the percids are relatively different. The meat of pikeperch has comparatively low shear strength with a high water-holding capacity resulting in high meat tenderness. The opposite situation is present in European perch. The results indicate that it is not possible to establish the overall quality characteristics for fish or production form, as there is a high range of variability. Consequently, it is particularly important that meat quality characteristics are developed for important aquaculture species for further improvement through changes in husbandry conditions when necessary.

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“…The higher content of total n-3 PUFA, especially docosahexanoic acid and DHA, in the fillet with regard to their content in experimental diets showed their selective retention. Relative resistance of the DHA to β-oxidation and high specificity of fatty acyl transferases for this n−3 LC-PUFA may be possible mechanisms for its selective deposition in tissues [74,75]. In addition, the fillet of rainbow trout fed the SCE-5 diets showed higher levels of DHA, DPA, and total n-3 PUFA levels when compared to the control group.…”

Section: Discussionmentioning

confidence: 96%

The Inclusion of the Microalga Scenedesmus sp. in Diets for Rainbow Trout, Onchorhynchus mykiss, Juveniles

Skalli¹,

Firmino

Andrée

et al. 2020

Animals

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A nutritional study was conducted to evaluate the inclusion of the green microalga Scenedesmus sp. at 5% (SCE-5) as an alternative fishmeal ingredient. This microalga was tested with four replicates during 45 days using isolipidic (18%), isoproteic (48%), and isoenergetic (1.9 MJ kg−1) diets. Fish fed Scenedesmus sp. showed similar growth and feed efficiency parameters as the control group. Regarding the digestive function, the SCE-5 diet enhanced the activity of alkaline pancreatic proteases, whereas it did not affect that of intestinal enzymes involved in nutrient absorption. No histological alterations were found in fish fed the SCE-5 diet, although a higher density of goblet cells in the anterior intestine and changes in gut microbiome diversity were found in this group, which collectively suggests positive effects of this green microalga on the intestine. Dietary Scenedesmus sp. improved the fillet’s nutritional quality in terms of n-3 polyunsaturated fatty acid (PUFA) levels, although it also increased its yellowish color. The overall results of this study showed that Scenedesmus sp. is a safe ingredient for compound feeds in rainbow trout when considering fish growth performance, animal condition, and health parameters, although it substantially affected the color of the fillet that may potentially affect consumers’ preferences.

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Endogenous biosynthesis of n-3 long-chain PUFA in Atlantic salmon

Cited by 13 publications

References 88 publications

Increasing dietary levels of the n-3 long-chain PUFA, EPA and DHA, improves the growth, welfare, robustness and fillet quality of Atlantic salmon in sea cages

Increasing dietary levels of the n-3 long-chain PUFA, EPA and DHA, improves the growth, welfare, robustness and fillet quality of Atlantic salmon in sea cages

Determination and Comparison of Physical Meat Quality Parameters of Percidae and Salmonidae in Aquaculture

The Inclusion of the Microalga Scenedesmus sp. in Diets for Rainbow Trout, Onchorhynchus mykiss, Juveniles

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