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Acheta Domesticus) for Human Con- Sumption in Thailand Sustainable and Cost-Efficient Feed Ingredi- ents for Optimum Breeding of House Crick- ets (Acheta domesticus) for Human Con- sumption in Thailand Miljövänliga och kostnadseffektiva foderingredienser för optimal uppfödning av hussyrsor (Acheta domesticus) för mänsklig konsumtion i Thailand Lina von Hackewitz Master’s thesis • 30 hp Swedish University of Agricultural Sciences, SLU Department of Molecular Science Agricultural Programme – Food Science Molecular Sciences, 2020:28 Sustainable and Cost-Efficient Feed Ingredients for Optimum Breeding of House Crickets (Acheta domesticus) for Human Consumption in Thailand Miljövänlig och kostnadseffektiv foderingrediens for optimal uppfödning av hussyrsor (Acheta domesticus) för mänsklig konsumtion i Thailand Lina von Hackewitz Supervisor: Sabine Sampels, Swedish University of Agricul- tural Science, Department of Molecular Science Assistant supervisor: Rickard Engberg, Global Bugs AB Sweden Examiner: Jana Pickova, Swedish University of Agricultural Science, Department of Molecular Science Credits: 30 hp Level: Second cycle, A2E Course title: Master thesis in Food Science, A2E-Agricultural Programme – Food Science Course code: EX0877 Programme/education: Agriculture Programme – Food Science Course coordinating dept: Department of Molecular Science Place of publication: Uppsala Year of publication: 2020 Cover picture: Lina von Hackewitz Title of series: Molecular Sciences Part number: 2020:28 Keywords: Acheta domesticus, house cricket, farming, feed, feed alternatives, chicken feed, growth, by-product Swedish University of Agricultural Sciences Faculty of Natural Resources and Agricultural Sciences (NJ) Department of Molecular Science Publishing and archiving Approved students’ theses at SLU are published electronically. As a student, you have the copyright to your own work and need to approve the electronic publishing. If you check the box for YES, the full text (pdf file) and metadata will be visible and searchable online. If you check the box for NO, only the metadata and the abstract will be visiable and searchable online. Nevertheless, when the document is uploaded it will still be archived as a digital file. If you are more than one author you all need to agree on a decision. You can find more information about publishing and archiving here: https://www.slu.se/en/ subweb/library/publish-and-analyse/register- and-publish/agreement-for-publishing/ ☒ YES, I/we hereby give permission to publish the present thesis in accordance with the SLU agreement regarding the transfer of the right to publish a work. ☐ NO, I/we do not give permission to publish the present work. The work will still be archived and its metadata and abstract will be visible and searchable. Abstract The world population is expected to increase over the next 30 years. The global food production system is under pressure to keep up with the growing demand . In the last years, increased attention has been paid to use livestock with lower environmental impact, like the house cricket Acheta domesticus. In Thailand’s northern and north-eastern regions, entomophagy has been a tradition since the past. House crickets are farmed due to their capacity to utilise resources, more efficiently than traditional livestock. They can be fed with wide variety of plant material, such as byproducts and food waste from food industry and agriculture. The quality of the house crickets depends to a great degree on the quality, consistency and composition of the feed. To sus- tain optimal growth, cricket farmers are traditionally using high-protein chicken feed (approximately 21% protein). However, the chicken feed con- taining soy- and fish meal is not sustainable. In this study some cost efficient and sustainable feed ingredients for soy- and fish meal for the in Thailand widely-used edible insect species, house cricket (Acheta domesticus), was investigated. The crickets were fed on feeds where soy- and fish meal was replaced with more sustainable products, such as food-industrial byproducts and weeds and which can be adapted to large- scale farm industry in Thailand. Three experimental feeds and one control feed were applied, to study the growth rate, survival rate and feed- and water use and feed conversion rate (FCR). The results indicated that rearing the house cricket Acheta domesticus on byproduct is possible. However, it is important to fulfill the crickets need of nutrients to increase the growth and survival rate of the house cricket. Homo- geneity and uniformity of feed is important to increase acceptability. Beyond the feed, farming temperature and relative humidity needs to be optimised, to increase the production of the house crickets. Keywords: Acheta domesticus, house cricket, farming, feed, feed alterna- tives, chicken feed, growth, byproduct Sammanfattning Världsbefolkningen förväntas öka under de kommande 30 åren. Det globala livsmedelsproduktionssystemet är under press för att hålla jämna steg med den växande efterfrågan på livsmedel. Under de senaste åren har det ägnats större uppmärksamhet åt att ersätta kött med lägre miljöpåverkan, som in- sekten hussyrsan Acheta domesticus. I Thailands norra och nordöstra reg- ioner har entomologi varit en tradition sedan många år tillbaka. Hussyrsor föds upp för att de kan utnyttja resurser effektivt de kan matas med en mängd olika växtmaterial såsom biprodukter och matavfall från livsmedelsindustrin och jordbruket. Hussyrsors kvalitet beror till stor del på fodrets kvalitet, kon- sistens och sammansättning. För att upprätthålla optimal tillväxt använder cricketbönder traditionellt kycklingfoder med hög proteinhalt (ungefär 21% protein). Kycklingfodret är dock med soja- och fiskmjöl inte hållbart eftersom den har stor miljöpåverkan. I den här studien studerades ett kostnadseffektivt och hållbart foderalter- nativ för soja- och fiskmjöl för i Thailand allmänt använda ätbara insektsarter, hussyrsor (Acheta domesticus). Syrsorna matades med foder där soja- och fiskmjöl ersattes med mer hållbara produkter, såsom livsmedelsindustriella biprodukter och ogräs och som kan anpassas till den storskaliga jordbruksin- dustrin i Thailand. Tre experimentfoder och ett kontrollfoder applicerades för att studera tillväxthastighet, överlevnadshastighet och foder- och vattenan- vändning och foderomvandlingsfrekvens (FCR). Resultaten påvisade att uppfödning av hussyrsor Acheta domesticus på biprodukt är möjligt. Det är emellertid viktigt att uppfylla syrsornas behov av näring för att öka tillväxten och överlevnaden. Fodrets homogenitet och en- hetlighet är viktig för att öka acceptansen. Utöver fodret måste farmens tem- peratur och den relativa luftfuktigheten optimeras för att öka dess överlev- nadstid. Nyckelord: Acheta domesticus, hussyrsor, uppfödning, foder, foderalternativ, hönsfoder, tillväxt, biprodukter Table of contents List of tables ................................................................................... 10 List of figures .................................................................................. 11 Abbreviations .................................................................................. 13 1 Introduction ............................................................................ 14 1.1 Global food challenges ..................................................... 14 1.2 A prospective alternative .................................................. 15 1.3 Sustainable rearing ........................................................... 16 1.4 Production site in Thailand, Global Bugs .......................... 16 1.5 Aim of the project .............................................................. 17 2 Background............................................................................ 18 2.1 The house cricket Acheta domesticus .............................. 18 2.1.1 Farming ..................................................................... 18 2.1.2 Breeding .................................................................... 19 2.1.3 Life cycle ................................................................... 19 2.1.4 Harvest ...................................................................... 21 2.1.5 Diseases.................................................................... 22 2.2 Good Agricultural practices for crickets in Thailand .......... 24 2.2.1 Farm design and layout ............................................. 24 2.2.2 Farm management .................................................... 24 2.2.3 Farm Animal health ................................................... 24 2.3 Feed ................................................................................. 25 2.3.1 Macro- and Micronutrients ......................................... 25 2.3.2 Feed Conversion Ratio .............................................. 27 2.4 Feed alternatives .............................................................. 28 2.4.1 Leucaena leucocephala ............................................. 29 2.4.2 Biscuit byproduct ....................................................... 29 2.4.3 Tomato pomace ......................................................... 29 2.4.4 Spent yeast and grain ................................................ 30 2.4.5 Duckweed .................................................................. 30 2.4.6 Macro- and Micronutrient for feed alternatives ........... 30 2.5 Cost efficiency .................................................................. 32 3 Materials and methods ........................................................... 33 3.1
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