Production performance, nutrient digestibility, serum biochemistry, fillet composition, intestinal microbiota and environmental impacts of European perch (Perca fluviatilis) fed defatted mealworm (Tenebrio molitor)

Tran, Hung Quang; Prokešová, Markéta; Zare, Mahyar; Matoušek, Jan; Ferrocino, Ilario; Gasco, Laura; Stejskal, Vlastimil

doi:10.1016/j.aquaculture.2021.737499

Cited by 22 publications

(7 citation statements)

References 106 publications

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“…The diets were formulated to be isolipidic with an average of 10% fat content, which excludes the possibility of causing elevated plasma cholesterol levels. This result is in contrast with the findings of Tran et al [ 77 ] and Jeong et al [ 78 ], who reported that defatted mealworm meal did not significantly affect the serum cholesterol level of European perch ( Perca fluviatilis ) and rainbow trout fed with diets containing 20.3% and 28% dietary protein (FM) replacement with defatted and fully fatted M, respectively. Our results suggest that replacing FM with defatted M meal may cause a higher cholesterol level in the blood and an increased hepatosomatic index (HSI%) in the fish ( Table 6 ).…”

Section: Discussioncontrasting

confidence: 99%

Physiological Response of Grower African Catfish to Dietary Black Soldier Fly and Mealworm Meal

Gebremichael¹,

Kucska²,

Ardó

et al. 2023

Animals

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A six-week experiment was carried out to test the effects of total (100%) and partial (50%) replacement of fish meal in the diet of African catfish growers with black soldier fly (B) meal, yellow mealworm (M) meal, and a 1:1 combination of both (BM) on the production and health of fish. A total of 420 fish with an average initial body weight of 200 ± 0.5 g were randomly distributed in triplicate to seven diet groups (C, B50, B100, M50, M100, BM50, and BM100, respectively). The growth performance and feed utilization of fish fed with partial or total replacement levels of FM with B were not significantly affected (p > 0.05) during the 6 weeks of feeding. In contrast, significant differences were observed between the groups fed with a diet where FM was totally replaced with M meal and the control in terms of final body weight, specific growth rate, feed conversion ratio, protein efficiency ratio, and protein productive value. Among the blood plasma biochemistry parameters, total cholesterol exhibited a significant difference (p = 0.007) between the M treatments and the control diet. The fatty acid profile of the liver was changed with respect to the long-chain polyunsaturated fatty acid content in all experimental groups. Parallel with this, the upregulation of elovl5 and fas genes in liver was found in all experimental groups compared to the control. Overall, this study shows that fish meal cannot be substituted with yellow mealworm meal in the practical diet of African catfish without compromising the growth, health and feed utilization parameters.

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Section: Discussioncontrasting

confidence: 99%

Physiological Response of Grower African Catfish to Dietary Black Soldier Fly and Mealworm Meal

Gebremichael¹,

Kucska²,

Ardó

et al. 2023

Animals

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“…As aquaculture turns to the inclusion of insect protein in fish diets, understanding microbial community responses to these ingredients is paramount. Several studies have evaluated the effects of IM-based diets on fish growth and digestibility ( Nogales-Mérida et al, 2018 ), however, studies on its impact on the gut microbiota of marine fish are still in low number and in certain cases, inconclusive ( Antonopoulou et al, 2019 ; Józefiak et al, 2019 ; Li et al, 2021 ; Panteli et al, 2021 ; Rimoldi et al, 2021 ; Terova et al, 2021 ; Tran et al, 2022 ). In this study, we unveil shifts occurring on European sea bass digesta- and mucosa-associated gut microbial communities in response to three different IM including, for the first time, an IM based on pupae exuviae.…”

Section: Discussionmentioning

confidence: 99%

Differential Modulation of the European Sea Bass Gut Microbiota by Distinct Insect Meals

et al. 2022

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The aquaculture industry is one of the fastest-growing sectors in animal food production. However, farming of carnivorous fish strongly relies on the use of wild fish-based meals, a practice that is environmentally and economically unsustainable. Insect-based diets constitute a strong candidate for fishmeal substitution, due to their high nutritional value and low environmental footprint. Nevertheless, data on the impact of insect meal (IM) on the gut microbiome of farmed fish are so far inconclusive, and very scarce in what concerns modulation of microbial-mediated functions. Here we use high-throughput 16S rRNA gene amplicon sequencing and quantitative PCR to evaluate the impact of different IMs on the composition and chitinolytic potential of the European sea bass gut digesta- and mucosa-associated communities. Our results show that insect-based diets of distinct origins differently impact the gut microbiota of the European sea bass (Dicentrarchus labrax). We detected clear modulatory effects of IM on the gut microbiota, which were more pronounced in the digesta, where communities differed considerably among the diets tested. Major community shifts were associated with the use of black soldier fly larvae (Hermetia illucens, HM) and pupal exuviae (HEM) feeds and were characterized by an increase in the relative abundance of the Firmicutes families Bacillaceae, Enterococcaceae, and Lachnospiraceae and the Actinobacteria family Actinomycetaceae, which all include taxa considered beneficial for fish health. Modulation of the digesta community by HEM was characterized by a sharp increase in Paenibacillus and a decrease of several Gammaproteobacteria and Bacteroidota members. In turn, a mealworm larvae-based diet (Tenebrio molitor, TM) had only a modest impact on microbiota composition. Further, using quantitative PCR, we demonstrate that shifts induced by HEM were accompanied by an increase in copy number of chitinase ChiA-encoding genes, predominantly originating from Paenibacillus species with effective chitinolytic activity. Our study reveals an HEM-driven increase in chitin-degrading taxa and associated chitinolytic activity, uncovering potential benefits of adopting exuviae-supplemented diets, a waste product of insect rearing, as a functional ingredient.

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“…17 Therefore, the further development of aquafeed formulas with the inclusion of potential insects, H. illucens, T. molitor and Z. variegatus suggested by the present review, should consider an additional cost for chitin degradation as this non-protein nitrogen compound indirectly causes such inefficacy. 60,101 Recirculating aquaculture systems could be a suitable option for farming fish fed insect-containing diets as solid wastes are effectively removed, thus maintaining water quality. 5 A more sustainable approach to tackle nitrogen waste output at the addition of insect ingredients could be combining multiple trophic species in the farming system, such as integrated multi-trophic aquaculture systems, polyculture-based aquaculture and aquaponic system.…”

Section: Tackling the Challeng E Smentioning

confidence: 99%

Systematic review and meta‐analysis of production performance of aquaculture species fed dietary insect meals

Tran

Nguyen

Prokešová

et al. 2022

Reviews in Aquaculture

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The present work employed a systematic review and meta‐analysis to quantify the overall effects of various types of insect meal on special growth rate (SGR), feed conversion ratio (FCR) and protein efficiency ratio (PER) of aquatic animals. A total of 107 studies published from 1990 to 2021, targeting 23 freshwater and 17 marine fish species, employing 17 insect species as a replacement for fishmeal, was compiled. Overall, a significantly higher Hedges’ g value for SGR and lower FCR was found in aquatic animals fed dietary larval defatted mealworm Tenebrio molitor and pupal full‐fat silkworm Bombyx mori compared with fishmeal diet. The majority of dietary insect meals had a negative linear correlation with Hedges’ g of growth performance, except larval fly Chrysomya megacephala, which had a positive linear relationship, and of prepupal defatted black soldier fly Hermetia illucens, which had a negative quadratic relationship. Some insect meals, including G. bimaculatus, adult grasshoppers of Oxya fuscovittata and Zonocerus variegatus and larval full‐fat Cirina butyrospermi, supported adequate growth of aquatic animals at plausible inclusion levels. At as low as 2.2%, insect‐derived chitin supported growth performance and improved feed utilization of marine fish species. In the quest to minimize fishmeal in aquafeeds, insect meal holds enormous potential but is not the sole option; rather, integrating insect meal and novel/conventional materials is more strategic. The present study lays the groundwork for further multidisciplinary considerations for the effective use of insect meal as an alternative aquafeed protein with the goal of long‐term sustainability.

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Production performance, nutrient digestibility, serum biochemistry, fillet composition, intestinal microbiota and environmental impacts of European perch (Perca fluviatilis) fed defatted mealworm (Tenebrio molitor)

Cited by 22 publications

References 106 publications

Physiological Response of Grower African Catfish to Dietary Black Soldier Fly and Mealworm Meal

Physiological Response of Grower African Catfish to Dietary Black Soldier Fly and Mealworm Meal

Differential Modulation of the European Sea Bass Gut Microbiota by Distinct Insect Meals

Systematic review and meta‐analysis of production performance of aquaculture species fed dietary insect meals

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