Individual-level Dietary Manipulation for Optimizing Mass Rearing of the Edible Cricket Gryllodes sigillatus
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Notice bibliographique
Résumé
Insects, a sustainable and nutritious alternative protein source, are one potential solution to mitigating food insecurity.North America and Europe are currently experiencing the rapid development of the insects as food and feed industry, with some companies focused on farming crickets for human food and agricultural feed.Increasing yield is a primary goal of agricultural research.Yield is a measurement of product harvested per unit area, and cricket farms struggle with how best to do this at a scale of billions of crickets required for a farming environment without the costs of additional labour.I argue that yield can be thought of as a function of survival and body size at and development time to adulthood.In this thesis, I have used a multifaceted approach to explore how diet can manipulate growth, development time to adulthood, and survival of Gryllodes sigillatus.My findings revealed that a 15% dietary supplementation with royal jelly elicited a sex-specific increase in mass; females fed the royal jelly diet were 30% heavier, and this effect was driven by significantly longer abdomens containing 67% more eggs compared to those fed the basal diet.I also demonstrate that manipulation of protein and carbohydrate availability can optimize growth and development of G. sigillatus; yield was maximized on a 3P:1C diet, as crickets fed this diet were most likely to develop into adults and grew maximum mass and body size.Similarly, I show that the physical attributes of diet can also exert strong influences on life history; crickets fed a large particle size diet grew larger and heavier faster compared to crickets fed a small particle size diet, and crickets also demonstrated a preference for medium and large size diet throughout development.Finally, I present the first recorded results detailing the pest-beneficial interactions between dermestids and farmed crickets; crickets experienced delayed growth early in life after living with dermestids, but crickets can tolerate living with, and consuming, dermestid larvae.Overall, my findings suggest iii that dietary supplementation, macronutrient ratio, diet particle size, and pest interactions all contribute to variation in cricket life history traits important to production yield.Thank you to my co-advisors, Heath and Sue, for such a truly enjoyable research experience.
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Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle