The investigation of the quality of snail inedible by-products
2000
Ristic, M. | Sakac, M. | Kormanjos, S. | Filipovic, S. (Tehnoloski fakultet, Novi Sad (Yugoslavia). Zavod za tehnologiju stocne hrane)
The need for investigation of the possibility for the use of inedible by-products obtained at primary processing of snails as potential feed for animals appeared as a result of the increased snail processing in Europe and the start of industrial processing in Yugoslavia. These investigations should include the determination of chemical-nutritive value of two dominant inedible by-products obtained at snails processing - shells and soft inedible by-products. Snail shells contain 1.14% crude proteins, 0.14% crude fat, 98.65% mineral matters, 0.07% N-free extractives, 39.33% calcium and 0.04% phosphorus in dry matter. By their chemical composition, snail shells are very similar to egg shells or limestone, so that they could be used as a substitute for this mineral feed in feed mixtures. Soft inedible snail by-products contain 56.56% crude proteins, 4.63% crude fat, 13.35% mineral matters, 25.46% N-free extractives, 4.24% calcium and 1.32% phosphorus in dry matter. High in vitro protein digestibility (91.40%), low collagen share in crude proteins (1.98% in dry matter) and favourable amino acid composition of these by-products indicate that they represent a valuable raw material for production of protein feedstuffs.
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