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. 2024 Mar 1;24(2):18.
doi: 10.1093/jisesa/ieae039.

Effects of protein levels on production performance, nutritional values, and phase feeding of two-spotted cricket

Chanwit Kaewtapee  1 , Punsak Triwai  1 , Chama Inson  2 , Roungthip Masmeatathip  3 , Piyapong Sriwongras  4
Affiliations

Effects of protein levels on production performance, nutritional values, and phase feeding of two-spotted cricket

Chanwit Kaewtapee et al. J Insect Sci. .

Abstract

Two experiments were conducted to determine the effects of different protein levels on the growth performance, feed efficiency and nutritional values, and phase feeding of the 2-spotted cricket (Gryllus bimaculatus de Geer). In experiment 1, 4 crude protein (CP) diets were formulated to contain 18%, 20%, 22%, or 24% CP, respectively. A sample of 7-day-old 3,600 crickets was equally divided into 24 plastic boxes (150 crickets each) in a completely randomized design with 4 diets and 6 replications. In experiment 2, 2-phase feedings were used. For starting period (days 7-18), crickets in all treatments were fed a diet containing 22% CP. During the growing period (days 19-35), 3 groups of crickets were fed diets containing 18%, 20%, and 22% CP. In the overall period of experiment 1, the crickets fed with 22% CP diet had greater body weight compared to those fed with 18% CP diet. In addition, the crickets fed with 22% CP diet had the lowest feed conversion ratio (FCR). The broken-line model indicated the growth pattern changed on day 18. In experiment 2, the crickets fed with 20% CP diet from days 19 to 35 had greater growth performance and lower FCR than those fed with 18% CP, but not different from those fed with 22% CP. In conclusion, 22% CP can increase growth performance by improving the feed efficiency of crickets. The implementation of 2-phase feedings using 20% CP, during the growing period, could be considered as a cost-effective strategy for sustainable cricket production.

Keywords: 2-spotted cricket; nutritional value; phase feeding; production performance; protein level.

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Figures

Fig. 1.
Fig. 1.
Gompertz growth models of crickets reared on different crude protein (CP) levels.
Fig. 2.
Fig. 2.
Broken-line model of single breakpoint with 2 linear functions for relationship between cricket growth and age (days).
Fig. 3.
Fig. 3.
Quadratic regression model for the relationship between crude protein levels (%) and average daily gain (mg/cricket).
See this image and copyright information in PMC

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