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BSF larvae have effect on streptococci in gut

BSF larvae have effect on streptococci in gut | BSF | Scoop.it
Ghent University researchers looked at the effect of feeding prepupae of the black soldier fly on the gut microbiota of pigs.
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Turkish scientists say black soldier fly could solve waste problem

Turkish scientists say black soldier fly could solve waste problem | BSF | Scoop.it
Scientists in Turkey say they have discovered that a black soldier fly could hold the answers to some of the country's biggest environmental concerns.

The fly larvae can rapidly consume organic waste and break it down into high-grade organic compost which scientists say is a perfect replacement for chemical fertilisers.

Scientists also believe that the black soldier fly and its larvae are excellent examples of sustainable bio-conversion as the larvae serve as excellent livestock feed.

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Faire la cour en famille

Faire la cour en famille | BSF | Scoop.it

Par Alain Fraval. OPIE-Insectes. Les Épingles entomologiques - En épingle en 2017 :Août

 

"La compétition entre mâles pour la copulation et la fertilisation est souvent néfaste aux femelles. Selon la théorie de la fitness inclusive, les femelles souffrent moins si les mâles qui se la disputent sont apparentés, leur succès reproducteur (fitness) est augmenté ; ceux-ci, globalement, y gagnent indirectement.


Les chercheurs, dans le but d’étayer la théorie, ont mené des expériences de mariages entre mouches du vinaigre Drosophila melanogaster, avec des résultats divergents. Le travail de Sally Le Page et de ses collaborateurs, à l’université d’Oxford (Royaume-Uni), a suivi un protocole amélioré, permettant de séparer les effets éventuels de la familiarité des asticots, élevés ensemble, de ceux de la parenté de mâles frères.


À des femelles vierges ont été présentés – et laissés libres de laisser cours à leur instinct -  3 mâles inexpérimentés eux aussi. Les mâles étaient des frères élevés ensemble, des frères séparés à l’éclosion puis réunis après l’émergence, des frères « de lait » ou de parfaits étrangers ne s’étant jamais rencontrés durant leur vie larvaire. Les chercheurs ont observé leurs manèges jusqu’à la conclusion puis ont suivi les femelles, dénombrant les pontes et leur descendance vivante parvenue au moins jusqu’à un stade nymphal avancé.
Tous les prétendants se sont comportés dans leurs approches de façon identique, pas plus gentils ni plus agressifs. Les femelles ont été plus fertiles et plus longévives lorsque courtisées par des mâles frères et qui furent asticots ensemble.


La mise en évidence de cet effet porte un nouvel éclairage sur l’effet des relations sociales sur les animaux et la théorie de la fitness inclusive mais, précise l’auteur, si cette théorie explique certains avantages que retire l’Homme de vivre en groupes apparentés, il ne faut pas transposer à cette espèce les résultats de cette étude.
Reste à préciser le rôle de cet avantage donné à la compétition entre apparentés, sélectionné par l’évolution, dans les populations de Mouche de vinaigre en nature, où il s’agit de proliférer sur des fruits pourris. Et à déterminer comment les individus se sentent apparentés, en faisant la part du microbiote et des hydrocarbures cuticulaires."


Article source (en anglais, gratuit) 


Photo : accouplement de Mouches du vinaigre, par Amy Hong


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Optimization of self-fermented period of waste coconut endosperm destined to feed black soldier fly larvae in enhancing the lipid and protein yields

Abstract
The prime objective of this study was to simultaneously enhance the lipid and protein yields from black soldier fly larvae (BSFL) fed with waste coconut endosperm. The waste coconut endosperm impoverished with nutrient content lost during milk extraction was nutritively fortified via self-fermentation process with time period ranging from 2-8 weeks before administering to BSFL. The results showed peak nutrient content was attained from week-4 self-fermented waste coconut endosperm. Using this feed medium, the BSFL prepupae could accumulate 58% of its biomass weight with lipid. The low polyunsaturated fatty acid (6%) and high C18:1 (50%) also guaranteed high biodiesel quality derived from BSFL. Nevertheless, the longer BSFL rearing duration when fed with week-6 self-fermented waste coconut endosperm had triggered a slight increase in protein yield (18%) in comparison with week-4 medium (15%). In considering of organic waste treatment advantage of week-4 self-fermented waste coconut endosperm, a total waste reduction of 0.019 g/d was successfully measured using only 20 BSFL. Therefore, week-4 self-fermented period was concluded as an optimum to produce ideal waste coconut endosperm feed medium for BSFL in enhancing the simultaneous lipid and protein yields.

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Bacteria encountered in raw insect, spider, scorpion, and centipede taxa including edible species, and their significance from the food hygiene point of view.

Bacteria encountered in raw insect, spider, scorpion, and centipede taxa including edible species, and their significance from the food hygiene point of view. | BSF | Scoop.it
Abstract
Background Insects, spiders, scorpions, and centipedes (non-crustacean arthropods; NCA) are consumed in most areas of the world. However, Western cultures generally do not practice this food habit (entomophagy) despite its advantages for the present and future of human nutrition. Little is known of the microbiological hazards associated with NCA consumption. Scope and Approach The present review summarizes the bacteriological findings on raw arthropod taxa containing edible species. In a second step, it shows potential of bacteria to impair food hygiene and food safety for the human consumer by relating the bacteria found to human diseases. Key Findings and Conclusions Many bacterial species are known to affect invertebrates and humans alike (e.g. Bacillus cereus, Staphylococcus aureus, Escherichia coli, and Rickettsiella spp.). Furthermore, insects can act as carriers for human pathogens if not obtained from a hygienic environment (e.g. salmonellae, Campylobacter spp., Shigella spp.). As with other foodstuffs of animal origin, exclusion of clinically-diseased specimens, hygienic obtention, washing and thorough heating seem suitable procedures to reduce the risk of food-borne diseases by bacteria, following the tradition of most NCA-consuming communities. Raw consumption of insects should be evaluated thoroughly, even when being traditional, because environmental changes could affect a previously valid innocuousness.

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Virome invertébrés : Découverte de 1 445 virus, dont quelques pathogènes...

Virome invertébrés : Découverte de 1 445 virus, dont quelques pathogènes... | BSF | Scoop.it
Cette étude pionnière publiée dans la revue Nature, montre que la virologie n’a, à ce jour, fait qu’effleurer la virosphère. En effet, ce ne sont pas moins de 1.445 virus incluant de nouvelles familles jusque-là inconnues qui viennent d’être découverts chez les invertébrés. Et, parmi ces microbes, quelques rares virus pourraient bien être pathogènes.

 

Par P. Bernanose & P. Pérochon. Santé log, 23.11.2016

 

[L'étude] Redefining the invertebrate RNA virosphere : Nature, 23.11.2016 http://www.nature.com/nature/journal/vaop/ncurrent/full/nature20167.html

 

___________________________________________________________________

SUR LE MÊME SUJET :

→ Des scientifiques découvrent près de 1 500 nouveaux virus, France Info, 25.11.2016 http://www.francetvinfo.fr/sciences/des-scientifiques-decouvrent-pres-de-1-500-nouveaux-virus_1939001.html

                         


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Effects of Larval Density and Feeding Rates on the Bioconversion of Vegetable Waste Using Black Soldier Fly Larvae Hermetia illucens (L.), (Diptera: Stratiomyidae)

Effects of Larval Density and Feeding Rates on the Bioconversion of Vegetable Waste Using Black Soldier Fly Larvae Hermetia illucens (L.), (Diptera: Stratiomyidae) | BSF | Scoop.it

Waste and Biomass Valorization

Angela Sofía Parra Paz,Nancy Soraya Carrejo,Carlos Humberto Gómez Rodríguez

 


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Jacques Mignon's curator insight, August 27, 2015 2:53 AM

Part abstract:

"The exploitation of fast degradation organic solid waste through the use of black soldier fly larvae Hermetia illucens constitutes a promising alternative in waste management given that it generates several products of added value (animal feed, larval compost, biofuels)."

...

"The results show that both variables have a significant influence on the bioconversion process, with larval density the most influential element.".

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EU derived protein sources no great shakes for reducing carbon footprint of feed: study

EU derived protein sources no great shakes for reducing carbon footprint of feed: study | BSF | Scoop.it
Insect and algae substitution

Replacement of 12% SBM-SA by 6.1% insects in the form of mealworms increased CFP from 595 to at least 717g CO2 Eq per kg of compound feed. “This is partly caused by the large energy requirement for heating during the production phase and a drying step thereafter,” noted the researchers.

They say that the use of other insect species with a low energy requirement during rearing, and those that can be raised on waste products could make soymeal substitution with insect derived protein more sustainable. “To explore this potential, more insect LCA studies are required,” said the team.

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Insect meals could replace up to 100% of conventional protein source in animal feeds, say researchers

Insect meals could replace up to 100% of conventional protein source in animal feeds, say researchers | BSF | Scoop.it
Insect meals could potentially replace between 25 and 100% of the soymeal or fishmeal in animal feeds, according to a new meta-study that has been accepted for publication in Animal Feed Science and Technology.
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« Devoir à la maison » : un gamin invente l’insecticide suave.

« Devoir à la maison » : un gamin invente l’insecticide suave. | BSF | Scoop.it

Par Alain Fraval. OPIE-Insectes. Des nouvelles des insectes : les Épingles entomologiques. « Devoir à la maison »

 

« Simon Kaschock-Marenda, 11 ans, était élève du collège Masterman (Pennsylvanie, États-Unis) ; Daniel Marenda, son père, biologiste à l’université Drexel, travaillant avec des drosophiles. Que choisit le premier comme sujet de son devoir de sciences naturelles ? D’examiner la réaction de ces dernières (Drosophila melanogaster) aux édulcorants que la famille venait d’adopter en lieu et place du sucre. »


« Et le Truvia (à base de stévia) de s’avérer mortel. Et le père de faire refaire la manip : même résultat. »


« Trois ans plus tard, l’effet létal est confirmé et précisé par les entomologistes de Drexel, il est publié dans PlosOne, avec Simon comme co-auteur. Les mouches montrent des défauts de coordination motrice et meurent au bout de quelques jours. Avec les édulcorants Pure Via (au stévia également), Equal, Splenda, Sweet ‘N Low et le sirop de maïs, pareillement incorporés dans le milieu d’élevage, les drosos vivent de 45 à 60 jours. »


« L’ingrédient toxique est l’érythritol, un édulcorant autorisé (peu sucrant mais non cariogène), présent naturellement dans le melon et le raisin. »


« L’université Drexel a entrepris de prendre un brevet pour cet insecticide consommable : l’érythritol pourrait être incorporé à des pièges. »


D’après, notamment, « Kid Scientist Accidentally Discovers Sweet Pest Control », lu le 4 août 2014 à //dailyhealthpost.com/
Article source : DOI: 10.1371/journal.pone.0098949

 

[Image] Kid Scientist Discovers That Truvia Sweetener Kills Fruit Flies
http://dailyhealthpost.com/truvia-sweetener-toxic-fruit-flies-study/

 

 

 


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Black Solider Fly (BSF) Links

Black Solider Fly (BSF) Links | BSF | Scoop.it
The Biopod and BSF ( black soldier fly ) site for worldwide shipping of the patented BioPod. We utilise biogrubs for aquaponic and enviroponic systems.
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Une protéine-prion, gardienne du souvenir - Le Monde

Une protéine-prion, gardienne du souvenir - Le Monde | BSF | Scoop.it
Une protéine-prion, gardienne du souvenir
Le Monde
Kausik Si s'est intéressé à la mémoire de la mouche drosophile, chez laquelle il avait déjà découvert un prion analogue à CEPB : Orb2.

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Impact of feeding larvae further explored

Impact of feeding larvae further explored | BSF | Scoop.it
In the coming 4 years, scientists from Wageningen University & Research in the Netherlands, together with the industry will investigate whether insect larvae are a sustainable source of nutrition for piglets and broilers.
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Immature Development Time of Hermetia illucens L. in Different Varieties of Feed

Immature Development Time of Hermetia illucens L. in Different Varieties of Feed | BSF | Scoop.it
ABSTRACT
Larvae of Hermetia illucens (Diptera: Stratiomyidae) (Black Soldier Fly) are voracious feeders which consume a wide range of organic materials. Thus, they can be used in simple mechanical systems to reduce organic waste and also as a nutritional factor for animal livestock, in the context of recycling the organic matter. In the present study we investigated the effect of two combinations of nutrient substrates on the immature development time of H. illucens. Poultry feed and urban bio-waste (catering organic waste) were used as nutritional substrates in two rates, 150 and 250 mg/larva. Results showed that both the food source and the quantity affected the BSF immature development time significantly. In total, significantly shorter immature development was recorded in poultry feed treatment compared with the catering waste. Moreover, immature development time in the 250 mg/larva/day treatment was significantly shorter compared with the 150 mg/larva/day treatment. Results of the present study could be useful and offer optimal solutions for BSF larvae cultivations, especially in large commercial scale units.

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Is Insect Protein a Sustainable Alternative to Soy and Fishmeal in Poultry Feed ?

Healthy growth was observed among all chickens, suggesting that Black Soldier Fly larvae can effectively replace soy and fishmeal in poultry feed. This confirmation of alternative feed has the potential to influence approval from the U.S. Food and Drug Administration (FDA) of insect based protein once analysis is conducted throughout the chicken’s lifetime for the next 2-6 weeks.

Via Jacques Mignon
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Jacques Mignon's curator insight, May 17, 2017 4:21 AM
By Madeline Gaffigan

Part abstract:
"This thesis describes a research experiment examining the potential of Black Soldier Fly larvae (Hermetia illucens) (Diptera: Stratidomyidae) reared on local food waste to effectively feed poultry. Significantly less water and land is required to raise Black Soldier Fly larvae and fewer greenhouse gas emissions are generated, relative to the production of soy and fishmeal for animal feed industry. In order to account for the environmental pressure meat production puts on our environment, chickens were raised on Black Cat Farm in Longmont, CO using a more sustainable, insect-based, feed."


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Improving feeding efficiencies of black soldier fly larvae, Hermetia illucens (L., 1758) (Diptera: Stratiomyidae: Hermetiinae) through manipulation of feeding conditions for industrial mass rearing

"This thesis answers questions about the feeding environment and density of H. illucens larvae in an industrial setting (i.e. food waste, and larger population sizes). By investigating how feed depth and particle size, feed provisioning rations (i.e. larval densities), and population sizes effect the ability of larvae to develop, survive and feed."

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Jacques Mignon's curator insight, May 5, 2017 7:12 AM
Part abstract:
"The results of this thesis were finding the optimal feed depths (i.e. 5-10 cm), provisioning rations (125 mg/larva/day) and population sizes (5 000-50 000 larvae per container) of H. illucens larvae when fed kitchen wastes. Additionally, two new measures of feeding efficiencies were described (i.e. provisioning ration change and optimal bioconversion deficit) and values for larval aggregation heat were also recorded for the first time. Future recommendations and research that came up during this study is also given to continue furthering an industry capitalising on US$ 750 million lost annually in all waste streams worldwide."

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Microbiology of processed edible insect products – Results of a preliminary survey

Microbiology of processed edible insect products – Results of a preliminary survey | BSF | Scoop.it

Highlights

• Dried insect yielded higher bacterial counts than cooked or deep-fried ones.
• Results suggest two microbiologically-different classes of insect products.
• Dried insects did not comply with bacterial count recommendations.
• All samples were free of salmonellae, E. coli, S. aureus, and L. monocytogenes.
• Dried insects contained food-borne (sometimes opportunistic) pathogens.


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Jacques Mignon's curator insight, December 6, 2016 12:58 AM
Part abstract: "Comparing the results with the hygiene criteria for edible insects proposed by Belgium and the Netherlands, class I products failed to comply with many bacterial count limits despite the absence of classical food pathogens. Therefore, class I products should always be consumed after another heating step as indicated by the manufacturer, until drying techniques are able to ensure lower bacterial counts."
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Identification and testing of oviposition attractant chemical compounds for Musca domestica

Identification and testing of oviposition attractant chemical compounds for Musca domestica | BSF | Scoop.it
Oviposition attractants for the house fly Musca domestica have been investigated using electrophysiological tests, behavioural assays and field tests.
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Fly Farm to Harvest Maggots for Animal Feed - YouTube

South African entrepreneur Jason Drew has started a company called AgriProtein that will grow, harvest, process, press and dry fly maggots to be used for ani...

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Geometric analysis of nutrient balancing in the mealworm beetle, Tenebrio molitor L. (Coleoptera: Tenebrionidae)

Geometric analysis of nutrient balancing in the mealworm beetle, Tenebrio molitor L. (Coleoptera: Tenebrionidae) | BSF | Scoop.it

Myung Suk Rho,Kwang Pum LeeJournal of Insect Physiology

Volume 71, December 2014, Pages 37–45


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Jacques Mignon's curator insight, November 18, 2014 4:24 AM
Highlights•

Geometric analysis on nutrient regulation was performed on a mealworm beetle.

Mealworm beetles self-selected protein and carbohydrate in a 1:1 ratio.

When restricted to imbalanced diets, beetles over-ingested the surplus nutrient.

Females retained greater lipid reserves and resisted starvation better than males.

The nutrient balancing behaviour matches the response for generalists and omnivores.

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Feeding insects as protein in poultry feed

Feeding insects as protein in poultry feed | BSF | Scoop.it

In the wild, insects are natural parts of poultry species’ omnivorous diet. Commercially, however, only birds kept in free-range systems would normally come into contact with them. Insects, though, are a protein-rich food source and have been traditionally used to supplement both the diets of animals and humans. 

  
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Technical hand book of domestication and production of the insect Hermetia illucens flyer / Ouvrages / La documentation / Indonésie / IRD - Sites de représentation / IRD - Indonésie

Technical hand book of domestication and production of the insect Hermetia illucens flyer / Ouvrages / La documentation / Indonésie / IRD - Sites de représentation / IRD - Indonésie | BSF | Scoop.it
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Black soldier fly (BSF) larvae for faecal sludge reduction - research in South Africa (with the company Agriprotein)

Black soldier fly (BSF) larvae for faecal sludge reduction - research in South Africa (with the company Agriprotein) | BSF | Scoop.it
Hi All We are in the process of setting up a community scale BSF waste processing system at Klipheuwel, South Africa. We will collect about 500kg of faecal waste per day and hope to...

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Un laser pour provoquer l'accouplement des mouches

Un laser pour provoquer l'accouplement des mouches | BSF | Scoop.it
Une équipe de chercheurs a réussi induire un comportement d'accouplement chez la mouche... à l'aide d'un laser.

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