M.-H. Deschamps

• Professor
• Professor (Assistant) at Université Laval

This study investigated the effect of black soldier fly larvae (BSFL) frass derived from BSFL reared on a diet composed of fruit/vegetable/bakery/brewery residues (FVBB diet) and on the Gainesville diet (GV diet) on the development of tomato (Solanum lycopersicum) Fusarium wilt caused by Fusarium oxysporum f. sp. lycopersici (FOL). Tomato plants we...

Larval frass from insects which consists of larval excrement, exoskeleton, and undigested diet, is a rich source of organic material and microorganisms. Despite its potential value, research on frass valorisation in agriculture is limited. In this study, single-layer agar (SLA) and double-layer agar (DLA) in vitro bioassays were conducted to evalua...

The growing interest in anaerobic digestion has led to an increase in the production of digestate that can be re-used. This work evaluates the possibility of using black soldier fly larvae (BSFL) to valorize biogas digestate, maize residue and alfalfa. The solid fraction of two digestates originating from two different biogas plants was used. Diffe...

The larvae of the Black Soldier Fly (Hermetia illucens) provide numerous ecological benefits, leading to significant commercial advancements. These benefits include the bioconversion of low-value waste into high-value feed and soil amendments. Understanding how the bacterial and eukaryotic microbiota communities affect host performance becomes vita...

Frass, the residual material resulting from the bioconversion of organic matter by black soldier fly larvae (BSFL), has gained attention as a sustainable alternative to conventional fertilizers due to its high nutrient content. Additionally, frass has been found to possess antifungal properties, which can help control plant pathogens affecting hort...

Black soldier fly larvae (BSF, Hermetia illucens) have gained much attention for their industrial use as biowaste recyclers and as a new source of animal proteins. The functional effect that microbiota has on insect health and growth performance remains largely unknown. This study clarifies the role of microbiota in BSF ontogeny by investigating th...

This report by the Quebec edible insect sector table portrait the edible insect industry in Quebec (Canada) in 2022. The edible insect industry in Quebec is structuring through the establishment of a sector table. Considering the rapid evolution of the industry, an up-to-date portrait of the situation in Quebec was necessary to carry out relevant...

Increasing concerns related to the negative environmental impacts of food waste havemotivated the development of new solutions to complete the waste cycle of organic residues. One particular "waste" product, the solid digestate from anaerobic digestion, has been identified for further bioprocessing. Black soldier fly (BSF, Hermetia illucens) larvae...

In recent years, the larval stage of Hermetia illucens, commonly known as the black soldier fly (BSFL), has been used to promote the circularity of the agri-food sector by bioconverting organic waste into larval biomass which has been used as a livestock feed. A secondary byproduct of this process is frass that can be used as an organic fertilizer....

In West Africa, numerous economies are dependent on fisheries resources; this sector can reach almost 10% of the national gross domestic product and represents a central sector for food security as the most important animal protein for human consumption and aquafeeds. Due to overexploitation, West African fish stocks are under serious threats and m...

Black soldier fly larvae (BSF, Hermetia illucens ) have gained much attention for their industrial use as biowaste recyclers and as a new source of animal proteins. The functional effect that microbiota has on insect health and growth performance remains largely unknown. This study clarifies the role of microbiota in BSF ontogeny by investigating t...

Black soldier fly larvae (BSF, Hermetia illucens ) have gained much attention for their industrial use as biowaste recyclers and as a new source of animal proteins. The functional effect that microbiota has on insect health and growth performance remains largely unknown. This study clarifies the role of microbiota in BSF ontogeny by investigating t...

Black soldier fly larvae (BSFL) are good candidates for upcycling wet organic residuals. Like other unprocessed raw animal products, BSFL require processing to prevent spoilage and degradation during storage and to facilitate their use as feed ingredients. In this study, hot-air drying and freeze-drying were examined as means to ensure long-term pr...

Excess phosphorus (P) in freshwater ecosystems increases primary production which, left uncontrolled, may lead to eutrophication, accelerating the ageing process of receiving water bodies. To limit phosphorus release resulting from freshwater aquaculture, we propose to incorporate microencapsulated P-chelating agents into fish diets. In a first tri...

Dual-energy X-ray absorptiometry (DXA) was evaluated to estimate body composition of rainbow trout (Oncorhynchus mykiss), with an emphasis on phosphorus (P) retention. Ninety rainbow trout (36-136 g) fed with control (1.10%) or low-P (0.55%) diets were scanned using a DXA instrument, both frozen and thawed. Whole-body scans were analysed using the...

Introducing entomophagy (insect consumption), a common practice in many countries around the world, in Western countries is a great challenge. Aiming to expand the adoption of this novel food requires an understanding of consumer’s acceptability towards edible insects, ultimately feeding into regionalised marketing approaches. As entomophagy bears...

The microbiota’s impact on host’s development, metabolism and immunology has made microbial study integral to the biology of organisms. Microorganisms coevolve with their host and can be vital for development, to the point that some host cannot survive in their absence. Studies have explored Hermetia illucens (BSF) microbiome, an insect prized for...

Simple Summary The projected global population growth by 2050 will require an increase in the production of high-quality food. Insects represent a promising alternative ingredient for feed with a lower environmental impact than conventional livestock such as poultry, swine and bovine species. In a context of commercial-scale production and consider...

This experiment was conducted in parallel with work in the Democratic Republic of the Congo (DR-Congo) with the objective to evaluate the growth performance and production costs of Nile tilapia fed diets formulated using local plant protein sources, and to compare them to those obtained with an optimized commercial fish feed. Ninety monosex male ti...

Cet article est disponible sur le site de Vecteur Environnement: http://www.reseau-environnement.com/wp-content/uploads/2016/09/Article-gratuit-final.pdf

Legal rules on the use of insects as feed and food vary across the world. Precise rules on safety, marketing, and animal welfare are largely missing. In the EU, United States and Canada, insects are novel and legally treated as such. InMexico, Australia, and China, many species of insects have a long tradition of food and/or feed use. We believe re...

The prevalence of bone deformities, particularly linked with mineral deficiency, is an important issue for fish production. Juvenile triploid rainbow trout (Oncorhynchus mykiss) were fed a low-phosphorus (P) diet for 27 weeks (60 to 630 g body mass). At study termination, 24.9% of the fish fed the low-P diet displayed homogeneous biconcave vertebra...

Otolith Sr/Ca, Ba/Ca and 87Sr/86Sr ratios and vertebral bone histomorphometry were used to investigate the life-history of Anguilla obscura eels from an enclosed lake, Lalolalo (Wallis Island in the Pacific), with no apparent connection with the sea. 87Sr/86Sr isotopic ratio from the core region gives evidence of indisputable marine origin of eels...

The aquaculture industry has long recognized the need to reduce phosphorus (P) waste outputs associated with environmental impact, and reduce off-flavor producing compounds, which can impact the quality of the fish product. This study was undertaken to investigate the effects of dietary high P (HP) and low P (LP) on growth, nutrient digestibility,...

Extended phosphorus (P) deficiency has been linked to an increase of skeletal deformities in farmed salmonids. To date, X-ray examination still is the most practical way to detect abnormalities that are not externally visible. The aim of this study was to develop a standardized method based on empirical measurements that provides an early radiograp...

In trout farmed in freshwater, the use of low phosphorus diet and other concurrent changes in food formulations could affect the normal growth of the skeleton and enhance the occurrence of vertebral abnormalities. Hence, it is important to refine diagnostic of malformations to quickly detect signs of P deficiency during production. Two practical di...

Rainbow trout (Oncorhynchus mykiss) is an important production species as well as one of the most studied fish models, particularly regarding nutritional physiology. Due to negative environmental impacts linked with rainbow trout farm effluents, significant restrictions have been established in numerous regions to reduce dietary phosphorus (P) outp...

Prolonged dietary phosphorus (P) deficiency induces a generalized demineralization of bone tissues; however, the differential responsiveness of the diverse tissues to P deficiency remains unknown. Triploid all-female juvenile rainbow trout (initial mass ~60 g) were fed two practical diets (0.26% and 0.52% digestible P for P-deficient and P-sufficie...

In order to identify biomarkers of oil pollution in fish we tested the effects of an experimental Light Cycle Oil (LCO) exposure on vertebral bone of sea bass, Dicentrarchus labrax L. A total of 60 adult fish were acclimated for fifteen days, then twenty were collected as controls (Day 0) while 40 were exposed to a soluble fraction of LCO (1136 ng...

A major problem for the fish farming industry is to find reliable indicators of bone condition that could help to prevent vertebral abnormalities. Here, we summarize the main results of two recent studies aiming to assess the variation of two vertebral bone variables (bone mineralization and vertebral total bone area) during rainbow trout grow-out...

Abnormal compressions and fusions of vertebral bodies are frequently observed in reared rainbow trout and could result from chronic and unbearable muscle pressures acting on the axial skeleton during intensive growth. Sustained swimming at moderate speeds was shown to induce many positive effects on growth and swimming performances in salmonids, bu...

Severe bone resorption of the vertebral body in reared rainbow trout was thought to be a dysfunction in mineral balance induced by increased growth rate in unfavourable rearing conditions. To verify this assumption, we sampled market-sized trout (c. 250 g) from 20 fish farms with different rearing conditions. Growth rate was also studied by samplin...

The present study aimed to evaluate the importance of “discreet” vertebral abnormalities in normally-shaped rainbow trout in relation to vertebral bone condition in French fish farms. A total of 373 trout (262±2 mm in total length) from 20 fish farms sampled were studied. The fish were radiographed and the axial skeleton examined for vertebral abno...

From the work of the histologists of the XIXth century, it rapidly became apparent that the Teleosts are constituted of two groups of fish: those that have bony tissues with embedded osteocytes (the basal taxa: Elopomorpha, Clupeomorpha, Osteoglossomorpha, Ostariophysi and many Salmoniforms) and those in which the bone lacks osteocytes (essentially...