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Agriculture Organization of the United Nations, 2000). Research with the utilization of food by-products, etc., as feed for cricket production in mind has problems such as the lack of uniformity in measurement and evaluation items (Kuo and Fisher, 2022). In addition, the fact that feed design methods for

Open Access
In: Journal of Insects as Food and Feed

Abstract

Crickets are being reevaluated as food and livestock feed due to their high nutritional value and low environmental impact during production, as food waste can be used as feed. On the other hand, current cricket production uses feed used in aquaculture and poultry farming, and these feeds contain animal proteins such as fish meal and chicken meal. This is simply converting other animal proteins into insect proteins. Therefore, this study aimed to test whether two-spotted cricket powder can be used as a substitute for fishmeal in diets for Gryllus bimaculatus production. Cricket weight, feed efficiency, and number of crickets were evaluated by feeding rice bran: cricket powder = 85:15 and rice bran: fish meal = 85:15, respectively, referring to the feed mix ratio used by cricket producers. Results showed no statistically significant differences between the two experiments in cricket weight and feed conversion ratio. When data were obtained separately for each growth phase, cricket weight was found to be highest in the fourth post-hatching week for the diet with cricket powder and then decreased (initial input: 1 g; 28 days: 89.45 ± 22.19 g; 35 days: 49.47 ± 14.11 g). Feed conversion efficiency was found to be higher in the second half of growth (1-7 days: 0.48; 23-28 days: 0.80). The use of insect powder as bait for crickets is a new proposal. In cricket production, adults with low reproductive capacity are packaged and sold as food or livestock feed, but by using insect powder as feed during cricket production, it is possible to reduce animal protein in the feed. In the future, we plan to investigate the usefulness of mass-produced insect powder as feed for crickets.

In: Journal of Insects as Food and Feed

Abstract

A 100-day growth trial was conducted to evaluate the effects of dietary protein mixtures (PM) adding proportion on both sexes of the red swamp crayfish, Procambarus clarkii (Girard, 1852). Five diets were prepared by replacing 0%, 16.67%, 33.33%, 50%, and 66.67% of fish meal (FM) protein with protein mixtures in feed (designed Diet 1, Diet 2, Diet 3, Diet 4 and Diet 5). The results showed that growth performance presented a decreasing trend with an increase in dietary protein mixture levels. The GSI of female crayfish and the HSI of male crayfish initially increased and then decreased with increasing dietary protein mixtures. Interestingly, the GSI of males fed Diet 5 was higher than that in other groups ( P < 0.05 ). Diet 2 was the best feed for female gonad development and male muscle quality. Females fed Diet 3 had the highest muscle quality among the groups; males had improved gonad development when fed Diet 5.

In: Crustaceana

, Sakuragaoka, 1-1-1, 1568502, Tokyo, Japan; *y3sasaki@nodai.ac.jp Received 6 April 2023 | Accepted 2 August 2023 | Published online 22 September 2023 | Published in issue 29 January 2024 Abstract In this study, a self-selected feed design was conducted for Japanese food wastes, considering the macronutrients

S.A.) for feed design support, and the staff from MAFRICA-Matadero Frigorífic del Cardoner S.A. for meat sampling assistance. REFERENCES 1. Corino, C., Rossi, R., Cannata, S. & Ratti, S. (2014). Effect of dietary linseed on the nutritional value and quality of pork and pork products: Systematic

In: 63rd International Congress of Meat Science and Technology

in plastic containers and stored a 25 °C in the dark for the duration of the study. Mealworm colony To obtain larvae in the first instars (2-4), we established a T. molitor colony from a mealworm stock purchased locally. The larvae stock was placed in a PET container Yellow mealworm feed design

in plastic containers and stored a 25 °C in the dark for the duration of the study. Mealworm colony To obtain larvae in the first instars (2-4), we established a T. molitor colony from a mealworm stock purchased locally. The larvae stock was placed in a PET container Yellow mealworm feed design

allotted to experimental treatments. Pigs were fed for ten days, 90% ad libitum, four times daily, with isoenergetic (13.3-13.9 kJ ME/g dry matter) and semi-synthetic diets based on wheat and gluten feed, designed to cover nutritional requirements for growing pigs. They were fed on either adequate amino

In: Progress in Research on Energy and Protein Metabolism

pair-feeding design was used. The amount of food was increased as the pigs grew and the final daily intake was 950-1050 g. At 9 weeks old, l. dorsi and rhomboideus muscles were sampled 16-17 hours after the last meal. D-glucose (3g/kg BW0.75) was orally given to the pigs 1h before the samplings in

In: Progress in Research on Energy and Protein Metabolism

feeding these horses before other horses, providing compatible equine company, and the judicious use of low-dose tranquilizers during training. Anecdotal reports of increased nervousness have been received when selenium is supplemented at higher than the recommended levels. Feeds designed for RER should