Antioxidant-related parameters, digestive enzyme activity and intestinal morphology in rainbow trout (<i>Oncorhynchus mykiss</i>) fry fed graded levels of red seaweed,<i>Gracilaria pygmaea</i>

Sotoudeh, Ebrahim; Mardani, F.

doi:10.1111/anu.12606

Cited by 45 publications

(27 citation statements)

References 45 publications

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“…Two previous studies that assessed the effect of diets supplemented with the brown seaweed, Laminaria digitata , in salmonids found that in Atlantic salmon, food intake and growth performance were not affected [47] while in rainbow trout the final body weight increased, FCR decreased and food intake remained unchanged [48]. More generally, the potential utility of other types of seaweeds as supplements or protein sources for salmonids has been investigated [19,26,49,50]. It was found that the inclusion of up to 10% Porphyra dioica (red seaweed) did not impair growth performance in rainbow trout ( Oncorhynchus mykiss ) but 15% inclusion reduced the final weight of the fish [49].…”

Section: Discussionmentioning

confidence: 99%

“…The macroalgae product Verdemin (derived from the green seaweed, Ulva ohnoi ) at inclusion levels of 2.5 and 5.0% in juvenile Atlantic salmon diets did not alter feed efficiency and growth performance [19]. Additionally, feeding rainbow trout diets supplemented with Gracilaria pygmaea improved growth performance at 6% inclusion level; however, growth was impaired at 12% inclusion [50]). Further, it was found that the inclusion of 5% Gracilaria vermiculophylla in rainbow trout diet did not negatively impact growth performance but 10% inclusion reduced the final weight, body length, daily growth index and PER [26].…”

Section: Discussionmentioning

confidence: 99%

“…In brown seaweeds, a representative of which we tested in our study, these compounds include polyphenols, phenolic compounds and sulphated polysaccharides [66–68]. Indeed, red and green seaweeds also contain polysaccharides and/or phenols/flavonoids [50,69–71]. These compounds have multiple properties including antimicrobial, immunostimulant, anti-viral, and antioxidant activities [72–74]) and can modulate numerous biological processes leading to improved physiological and health status.…”

Section: Discussionmentioning

confidence: 99%

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Brown seaweed (AquaArom) supplementation increases food intake and improves growth, antioxidant status and resistance to temperature stress in Atlantic salmon, Salmo salar

2019

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Seaweeds represent a vast resource that remains underutilized as an ingredient in aquafeeds. Here we probed the effect of addition of AquaArom, a seaweed meal derived from brown seaweeds (Laminaria sp., kelp), to fish feed on growth performance, antioxidant capacity and temperature responsiveness of mitochondrial respiration. A commercial salmonid feed was mixed with 0 (control), 3, 6 and 10% seaweed and fed to Atlantic salmon ( Salmo salar ) smolts for 30 days. The smolts consumed more of the seaweed-supplemented food relative to the control and there were no mortalities. Compared with the control, the final fish weight, standard length, weight gain and SGR were higher in fish fed diets supplemented with the 3 and 10% seaweed, while growth performance for fish maintained on 6% seaweed remained neutral. Importantly, seaweed supplementation increased protein efficiency ratio (PER) and tended to improve food conversion ratio (FCR). Although the hepatosomatic and visceral indices did not change, whole gut and intestinal weights and lengths were higher in fish maintained on seaweed-supplemented diets suggesting increased retention time and a larger surface area for food digestion and nutrient absorption. Measurement of antioxidant status revealed that seaweed supplementation dose-dependently increased plasma total antioxidant capacity as well as the level of glutathione, and activities of catalase and superoxide dismutase in liver mitochondria. Moreover, seaweed supplementation reduced the effect of acute temperature rise on mitochondrial respiration and proton leak. Overall, these data suggest that AquaArom can be mixed with fish food up to 10% to increase food consumption and enhance growth performance, as well as to improve antioxidant capacity and alleviate adverse effects of stressors such as temperature in fish.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Brown seaweed (AquaArom) supplementation increases food intake and improves growth, antioxidant status and resistance to temperature stress in Atlantic salmon, Salmo salar

2019

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“…There were no adverse effects on growth performance at dietary inclusion levels of 100 g kg −1 for G. bursa‐pastoris and 50 g kg −1 for G. cornea , while 100 g kg −1 of G. cornea reduced growth rate and feed efficiency. Sotoudeh and Mardani fed a Gracilaria pygmaea meal to rainbow trout fry and reported improved growth performance with the inclusion of 60 g kg −1 of G. pygmaea , but reduced final body weight, specific growth rate, and protein efficiency ratio when the inclusion level was increased to 120 g kg −1 . Studies with extruded isoenergetic, isonitrogenous, and isolipidic diets for the European sea bass showed that 75 g kg −1 of Gracilaria spp.…”

Section: Effects On Growth Performance Protein Utilization and Carcamentioning

confidence: 99%

Marine macroalgae as sources of protein and bioactive compounds in feed for monogastric animals

2018

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Marine macroalgae are considered as promising sustainable alternatives to conventional terrestrial animal feed resources. The advantages include high growth rate, potential cultivation in saltwater, and no occupation of arable land. Macroalgae are broadly classified as brown (Phaeophyta), red (Rhodophyta) and green (Chlorophyta) algae, and are a diverse group of marine organisms. The nutritional value of macroalgae is highly variable. The protein and essential amino acid content can be low, especially in brown species, and indigestible polysaccharides adversely affect the energy value. Optimal use of macroalgae in feeds requires suitable processing, and biorefinery approaches may increase protein content and improve nutrient availability. Macroalgae are rich in unique bioactive components and there is a growing interest in the potentially beneficial health effects of compounds such as laminarin and fucoidan in different macroalgal and macroalgal products. This review summarizes current literature on different aspects of the use of macroalgae as sources of protein and health-promoting bioactive compounds in feed for monogastric animal species.

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“…at 2.5 or 7.5% levels, or a mix of the three seaweeds (each supplemented at 2.5%) (Peixoto et al 2016). Moreover, Sotoudeh and Mardani (2018) have recently quantified TBARS content in the liver of rainbow trout fry fed diets supplemented with 0, 30 and 60 g/kg of Gracilaria pygmaea, finding that it was not significantly affected by the different diets.…”

Section: Fillet Oxidative Statusmentioning

confidence: 99%

A commercial macroalgae extract in a plant-protein rich diet diminished saturated fatty acids of Oncorhynchus mykiss walbaum fillets

Bruni

Secci

Mancini

et al. 2020

Italian Journal of Animal Science

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Seaweeds are considered novel feed ingredients, nutraceutical compounds and source of pigments and proteins. They appear to possess bioactive properties, such as hypolipidemic, antioxidant and immune-stimulative actions; furthermore, their proteins are considered just as nutritious as terrestrial vegetables. In the present work, rainbow trout (Oncorhynchus mykiss Walbaum) was fed for 95 days with three diets: a fishmeal-based positive control diet (Cþ), a vegetable protein-based negative control diet (CÀ) and a diet similar to C À where 5% of soybean concentrate was replaced by a commercial blend of seaweeds (T). The monitored parameters were fish performance, physical and marketable characteristics, fillet oxidative status and fatty acid content. The estimated indices of enzyme activities involved in lipid metabolism were calculated. Fish performances were reduced in C À and T fish; C À and T fillet fatty acid (FA) profiles globally showed the same pattern and were distinct from Cþ, i.e. with a lower content of polyunsaturated FAs and a higher content of monounsaturated and polyunsaturated n6 FAs; contrarywise, saturated FAs were significantly lower in T group in comparison to the other two groups (p < .01). The estimated indices of enzyme activity highlighted differences between dietary groups; desaturase activities of C18 and n3 FAs were higher in T in comparison to CÀ (p < .001). A slight impoverishment of antioxidant activity was found in T compared to C þ group. Dietary seaweeds seemed to be capable of influencing fillet FA composition as well as the activity of enzymes related to lipid metabolism. Further studies in this regard are encouraged. HIGHLIGHTS Seaweeds are novel feed ingredients with nutraceutical properties Saturated fatty acids of rainbow trout fillets were lowered by seaweed inclusion in the diet Estimated desaturase activities of C18 and n3 fatty acids were higher in seaweed-fed trout ARTICLE HISTORY

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Antioxidant-related parameters, digestive enzyme activity and intestinal morphology in rainbow trout (Oncorhynchus mykiss) fry fed graded levels of red seaweed,Gracilaria pygmaea

Cited by 45 publications

References 45 publications

Brown seaweed (AquaArom) supplementation increases food intake and improves growth, antioxidant status and resistance to temperature stress in Atlantic salmon, Salmo salar

Brown seaweed (AquaArom) supplementation increases food intake and improves growth, antioxidant status and resistance to temperature stress in Atlantic salmon, Salmo salar

Marine macroalgae as sources of protein and bioactive compounds in feed for monogastric animals

A commercial macroalgae extract in a plant-protein rich diet diminished saturated fatty acids of Oncorhynchus mykiss walbaum fillets

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