Evaluation of the suitability of a partially defatted black soldier fly (Hermetia illucens L.) larvae meal as ingredient for rainbow trout (Oncorhynchus mykiss Walbaum) diets
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Open Access
- 1 July 2017
- journal article
- research article
- Published by Springer Science and Business Media LLC in Journal of Animal Science and Biotechnology
- Vol. 8 (1), 57
- https://doi.org/10.1186/s40104-017-0191-3
Abstract
Two trials were performed to evaluate a partially defatted Hermetia illucens (HI) larvae meal as potential feed ingredient in rainbow trout (Oncorhynchus mykiss Walbaum) diets. In the first trial, 360 trout (178.9 ± 9.8 g of mean initial body weight) were randomly divided into three experimental groups (4 tanks/treatment, 30 fish/tank). The fish were fed for 78 days with isonitrogenous, isolipidic and isoenergetic diets containing increasing levels of HI, on as fed basis: 0% (HI0, control diet), 25% (HI25) and 50% (HI50) of fish meal substitution, corresponding to dietary inclusion levels of 0, 20% and 40%. In the second trial, 36 trout (4 tanks/treatment, 3 fish/tank) were used to evaluate the in vivo apparent digestibility coefficients (ADC) of the same diets used in the first trial. Survival, growth performance, condition factor, somatic indexes, and dorsal fillet physical quality parameters were not affected by diet. The highest dietary inclusion of HI larvae meal increased dry matter and ether extract contents of trout dorsal fillet. The use of HI larvae meal induced a decrease of valuable polyunsaturated fatty acids (PUFA) even if differences were only reported at the highest level of HI inclusion. The insect meal worsened the lipids health indexes of the same muscle. Dietary inclusion of insect meal did not alter the villus height of the fish. No differences were found among treatments in relation to ADC of ether extract and gross energy, while ADC of dry matter and crude protein were higher in HI25 if compared to HI50. The obtained results showed that a partially defatted HI larvae meal can be used as feed ingredient in trout diets up to 40% of inclusion level without impacting survival, growth performance, condition factor, somatic indexes, dorsal fillet physical quality parameters, and intestinal morphology of the fish. However, further investigations on specific feeding strategies and diet formulations are needed to limit the observed negative effects of the insect meal on the FA composition of dorsal muscle.Keywords
This publication has 40 references indexed in Scilit:
- The carcass quality, meat quality and sensory characteristics of broilers raised on diets containing either Musca domestica larvae meal, fish meal or soya bean meal as the main protein sourceAnimal Production Science, 2014
- Enzymatic and Histological Evaluations of Gut and Liver in Rainbow Trout, Oncorhynchus mykiss, Fed with Rice Protein Concentrate‐based DietsJournal of the World Aquaculture Society, 2012
- Sensory Analysis of Rainbow Trout, Oncorhynchus mykiss, Fed Enriched Black Soldier Fly Prepupae, Hermetia illucensJournal of the World Aquaculture Society, 2011
- Fish meal replacement by plant protein substitution and guar gum addition in trout feed, Part I: Effects on feed utilization and fish qualityAquaculture, 2011
- Performance, gut morphology and carcass characteristics of fattening rabbits as affected by particle size of pelleted dietsArchives of Animal Nutrition, 2010
- Rice protein concentrate meal as a potential ingredient in practical diets for rainbow trout (Oncorhynchus mykiss)Aquaculture, 2006
- Effect of protein level and flushing method on the reproductive performance of rabbitsAnimal Science Journal, 2005
- Effect of long-term feeding with a plant protein mixture based diet on growth and body/fillet quality traits of large rainbow trout (Oncorhynchus mykiss)Aquaculture, 2004
- Quality traits of brown trouts (Salmo trutta) cutlets described by automated color image analysisAquaculture, 2004
- Effect of dietary protein level, amino acid balance and feeding level on growth, gastrointestinal tract, and mucosal structure of the small intestine in broiler chickensAnimal Research, 2002