Mealworm as dietary protein source for rainbow trout: Body and fillet quality traits

Iaconisi, Valeria; Bonelli, Antonio; Pupino, Rita; Gai, Francesco; Parisi, Giuliana

doi:10.1016/j.aquaculture.2017.11.034

Cited by 81 publications

(68 citation statements)

References 34 publications

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“…In the present study, a dietary replacement of fishmeal with HI larvae in the diets of salmon did not affect the color, pH, WHC or texture of the flesh. Similarly, a partial replacement of fishmeal with full‐fat T. molitor larvae (TM, at 25% and 50% inclusion) did not exhibit any difference on the physiological traits of rainbow trout compared to the control group (where fishmeal was the exclusive protein source) . However, in that study, the 50% group (inclusion levels of 500 g TM per kg diet) showed a higher redness index of the skin compared to the other groups .…”

Section: Discussionmentioning

confidence: 72%

“…However, in that study, the 50% group (inclusion levels of 500 g TM per kg diet) showed a higher redness index of the skin compared to the other groups . It was suggested that the effects observed might be a result of the corn gluten meal inclusion in the diets . In addition, the color parameter values of the skin, at the dorsal and ventral regions, were found to be similar in gilthead seabream ( Sparus aurata ) fed 25% and 50% full‐fat T. molitor inclusion diets compared to control diet containing fishmeal and plant‐based protein .…”

Section: Discussionmentioning

confidence: 78%

“…Similarly, a partial replacement of fishmeal with full‐fat T. molitor larvae (TM, at 25% and 50% inclusion) did not exhibit any difference on the physiological traits of rainbow trout compared to the control group (where fishmeal was the exclusive protein source) . However, in that study, the 50% group (inclusion levels of 500 g TM per kg diet) showed a higher redness index of the skin compared to the other groups . It was suggested that the effects observed might be a result of the corn gluten meal inclusion in the diets .…”

Section: Discussionmentioning

confidence: 79%

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Total replacement of dietary fish meal with black soldier fly (Hermetia illucens) larvae does not impair physical, chemical or volatile composition of farmed Atlantic salmon (Salmo salar L.)

et al. 2019

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BACKGROUND: The aquafeed sector has been replacing conventional dietary ingredients with more economic and eco-friendly ingredients. Insects embody a promising alternative as a result of being highly nutritious and showing traits leading to a circular bioeconomy. Atlantic salmon (Salmo salar L.) at the sea-water stage were fed diets with a partial or complete substitution of fishmeal with meal of Hermetia illucens larvae reared on a media containing Ascophyllum nodosum mixed with organic wastes (60:40). The present study aimed to assess the quality of fillets by characterizing its physico-chemical traits with conventional and innovative methods, such as the proton transfer reaction-time of flight-mass spectrometer technique, allowing the analysis of samples at room temperature. Finally, steamed fillets underwent a consumer test to investigate the liking of consumers and their intention of re-consumption. RESULTS:The main findings showed that a complete dietary substitution of fishmeal with H. illucens larvae meal did not impair the physico-chemical quality of A. salmon fillets. Notably, neutral n-3 polyunsaturated fatty acids (PUFA) slightly but significantly increased in the fillets of A. salmon fed H. illucens, also as a result of the additional fish oil present in the diets containing insect. The volatile organic profile was not altered by the different diets. The consumer-liking test revealed that Italian consumers appreciated the tested salmon irrespective of the administered feed. CONCLUSION: Tailoring the insect fatty acid profile by rearing the larvae on a PUFA-rich substrate, coupled with a dietary modulation of the oily source, can successfully maintain or even increase the cardioprotective characteristics of fillets. Physical analysesThe pH was measured in two points of the cranial and caudal regions of each fillet by a pH-meter METTLER TOLEDO (Mettler-Toledo, Schwerzenbach, Switzerland). Fillet color measurement, expressed as L* (lightness), a* (redness) and b* (yellowness) indices, 17 was performed on two points of both cranial and caudal regions, using a Konica Minolta colorimeter (Chiyoda, Tokyo, Japan). Texture measurements were performed using a Zwick Roell ) equipped with a 1-kN load cell. A 4 × 4 cm section

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 79%

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Total replacement of dietary fish meal with black soldier fly (Hermetia illucens) larvae does not impair physical, chemical or volatile composition of farmed Atlantic salmon (Salmo salar L.)

et al. 2019

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“…One serious consequence of the over-exploitation of ecosystems is the threat posed to fish production. Compounded by the continual growth of the world's population, a global protein shortage is foreseen [25]. For these reasons, the increasing number of people require that future fish production be not only high yielding, but also sustainable.…”

Section: Literature Reviewmentioning

confidence: 99%

The Introduction of Insect Meal into Fish Diet: The First Economic Analysis on European Sea Bass Farming

et al. 2019

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The economic and environmental sustainability of aquaculture depends significantly on the nature and quality of the fish feed used. One of the main criticisms of aquaculture is the need to use significant amounts of fish meal, and other marine protein sources, in such feed. Unfortunately, the availability of the oceanic resources, typically used to produce fish feed, cannot be utilized indefinitely to cover the worldwide feed demand caused by ever-increasing aquaculture production. In light of these considerations, this study estimates how aquaculture farm economic outcomes can change by introducing insect meal into the diet of cultivated fish. Several possible economic effects are simulated, based on various scenarios, with different percentages of insect flour in the feed and varying meal prices using a case study of a specialized off-shore sea bass farm in Italy. The findings indicate that the introduction of insect meal—composed of Tenebrio molitor—would increase feeding costs due to the high market prices of this flour and its less convenient feed conversion ratio than that of fish meal. Therefore, the expected environmental benefits of using this highly promising insect meal in fish feed do not align with the current economic interests of the aquaculture industry. To our knowledge, this is the first study to investigate this theme, and it must be noted that our findings cannot be generalized widely because a specific case study was used. Nevertheless, our findings suggest that efforts should be made—at least at the farm level—to find profitable ways to encourage the introduction of this attractive alternative to guarantee both economic and environmental sustainability in the near future.

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“…Texture was assessed as the maximum shear force value obtained after a 50% Warner-Bratzler shear test; a Zwick Roell V R 109 texturometer (Zwick Roell, Ulm, Germany), equipped with a 1 kN load cell and a straight blade (width of 7 cm), was used to perform the test set at a crosshead speed of 30 mm/min. Afterwards, fillets were skinned, homogenised and used to determine WHC (Iaconisi et al 2018) and chemical composition, as described below.…”

Section: Fillet Physical Characteristicsmentioning

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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Mealworm as dietary protein source for rainbow trout: Body and fillet quality traits

Cited by 81 publications

References 34 publications

Total replacement of dietary fish meal with black soldier fly (Hermetia illucens) larvae does not impair physical, chemical or volatile composition of farmed Atlantic salmon (Salmo salar L.)

Total replacement of dietary fish meal with black soldier fly (Hermetia illucens) larvae does not impair physical, chemical or volatile composition of farmed Atlantic salmon (Salmo salar L.)

The Introduction of Insect Meal into Fish Diet: The First Economic Analysis on European Sea Bass Farming

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

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