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Bioresources and Bioprocessing
Fig. 1 | Bioresources and Bioprocessing

Fig. 1

From: Conventional use and sustainable valorization of spent egg-laying hens as functional foods and biomaterials: A review

Fig. 1

Profiles of egg and laying hen production. A Global egg production of 2008–2018. B Share of world market in egg production of global major producers in 2018. C Production of eggs (billions) and egg-laying hens (millions) of global major producers in 2018. Egg production was obtained from International Egg Commission; the number of spent hens were calculated based on the egg-laying capacity of 300 eggs/hen per year (Alders et al. 2018). D Body weight performance of several layer species. Body weight reference data of Bovans white, Lehmann brown, Lohmann Selected Leghorn (LSL), and Hy-Line W-36 referred to the management guide of New-Life Mills, Lohmann Breeders, and Ly-Line, respectively

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