Scenedesmus almeriensis from an integrated system waste-nutrient, as sustainable protein source for feed to rainbow trout (Oncorhynchus mykiss)

Tomás-Almenar, Cristina; Larrán, Ana María; Mercado, E. de; Sanz-Calvo, Miguel Ángel; Hernández, D.; Riaño, Berta; García-González, María Cruz

doi:10.1016/j.aquaculture.2018.08.011

Cited by 23 publications

(11 citation statements)

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“…Regarding fillet quality in terms of its color, present results were in agreement with those reported using S. almeriensis produced in agro-industrial wastewater [70]. In both studies, the dietary inclusion of Scenedesmus sp.…”

Section: Discussionsupporting

confidence: 91%

“…In particular, b* values in our study incorporating Scenedesmus sp. at 5% were double those measured when S. almeriensis was included at 10% in diets for rainbow trout [70]. The increase in yellow fillet coloration may be attributed to the presence of carotenoids, especially lutein, in this green microalga.…”

Section: Discussionmentioning

confidence: 68%

“…Under present experimental conditions, neither FCR nor FI were affected by the inclusion of Scenedesmus sp. in the feed for rainbow trout, similarly to Vizcaíno et al [18], whereas other studies have reported an increment in FCR values with increasing inclusion rates of this microalga in rainbow trout [70] and Atlantic salmon [35]. Such reduced FCR and FCI values have been associated to lower bioavailability of nutrients [35], whereas others have correlated it to changes in diet palatability [70].…”

Section: Discussionmentioning

confidence: 88%

“…However, there exist other studies in which the FM substitution by different microalgal species impaired fish performance. For instance, in diets for rainbow trout, S. almeriensis produced in agro-industrial wastewater evaluated at 1.3 to 10% of inclusion decreased somatic growth, results that were attributed to the lower digestibility of the microalga protein [70]. In contrast, other authors have recently reported that regardless of showing good values for digestibility, the inclusion in diets of a blend of several microalgae, such as Nannochloroposis sp.…”

Section: Discussionmentioning

confidence: 97%

“…Various species of microalgae, including Spirulina, Nannochloropsis, Chlorella, Isochrysis, Tetraselmis, Secenedesmus, and Schizochytrium spp. have proven to be viable protein and lipid sources in aquafeeds [8,69,70]. Under this context, the authors decided to test the suitably of Scenedesmus sp.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 68%