Effects of Temperature Variation on Yield and Quality of Field Crickets (Gryllus bimaculatus) and Black Soldier Flies (Hermetia illucens)

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dc.contributor.author Korir, Leonard C.
dc.contributor.author Ronoh, Erick K.
dc.contributor.author Ondimu, Stephen N.
dc.contributor.author Kinyuru, John N.
dc.contributor.author Gicheha, Mathew G.
dc.date.accessioned 2024-08-09T10:53:28Z
dc.date.available 2024-08-09T10:53:28Z
dc.date.issued 2024-08-09
dc.identifier.citation KorirLC2024 en_US
dc.identifier.issn 1561-7645 (online)
dc.identifier.uri https://ojs.jkuat.ac.ke/index.php/JAGST
dc.identifier.uri http://localhost/xmlui/handle/123456789/6437
dc.description Journal of Agriculture Science & Technology JAGST 22 (6) 2023, 1-19 Temperature impact on field crickets and black soldier flies en_US
dc.description.abstract Insect rearing provides an affordable alternative source of animal nutrition for most small-scale farmers. However, current rearing technology with uncontrolled environmental conditions suppresses insect yields, leading to low adoption of insect production. The objective of this study was to assess the effect of temperature variation, using an adaptive control structure, on the yield of field crickets (Gryllus bimaculatus) and black soldier fly larvae (Hermetia illucens). Temperature values of 25°C, 27°C, and 30°C constant relative humidity of 50%, and constant air speed of 3 m/s were adopted for the study. Throughout the study, weighing of the insect wet yield was done on a daily basis for larvae and after three days for cricket pinheads. Black soldier fly larvae and adult crickets were harvested at the ages of two weeks and six weeks, respectively, and oven dried at 105°C for 24 hours for subsequent analysis of proteins. Results indicated that black soldier fly larvae reared at 25°C, 27°C, and 30°C had a maximum mean wet yield of 0.216 ± 0.022 g, 0.234 ± 0.019 g, and 0.248 ± 0.016 g, respectively, at the age of two weeks. Similarly, crickets reared at 25°C, 27°C, and 30°C had a mean yield of 0.807 ± 0.167 g, 0.933 ± 0.102 g, and 1.306 ± 0.254 g at the age of six weeks. Dried cricket reared at 25°C, 27°C, and 30°C had 25.566 ± 0.012%, 46.811 ± 0.647%, and 58.216 ± 1.510% protein, respectively. Contrary to this, black soldier flies reared at 25°C, 27°C, and 30°C yielded 42.655 ± 1.732%, 47.121 ± 0.015%, and 62.536 ± 0.014%, respectively. Larval yield recorded significant different yields (f = 4.935, p = 0.03), whereas crickets failed to record significant different yields (f = 0.777, p = 0.388) under different temperature levels. A higher temperature regime yielded higher body mass and protein turnover. The findings of this study boost the future prospects of insects as food and feed for enhancing food and nutrition security. Keywords: Adaptive rearing structure, Environment, Insect feed, Yield en_US
dc.description.sponsorship Korir, Leonard C. Ronoh, Erick K. Ondimu, Stephen N. Kinyuru, John N. Gicheha, Mathew G. en_US
dc.language.iso en en_US
dc.publisher JKUAT-CoANRE en_US
dc.subject Adaptive rearing structure en_US
dc.subject Environment en_US
dc.subject Insect feed en_US
dc.subject Yield en_US
dc.title Effects of Temperature Variation on Yield and Quality of Field Crickets (Gryllus bimaculatus) and Black Soldier Flies (Hermetia illucens) en_US
dc.type Article en_US


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