دانلود رایگان مقاله انگلیسی حلزون به عنوان موجود زنده کوچک: پتانسیل غذایی صدف حلزونی کاشته شده - الزویر 2017

Abstract

Amino acids, fatty acids and minerals were investigated in the farmed freshwater snail Pomacea canaliculata (Ampullariidae) to understand its nutritional potential as alternative livestock. Snail samples with removed gut content were collected from a local snail farm in the Republic of Korea. Almost all the essential amino acids present in the snail protein satisfied the recommended level for an ideal protein pattern, while methionine was present at a marginal level. The proportion of unsaturated fatty acids (60.5%) was higher than that of saturated fatty acids (39.5%). The ratio of polyunsaturated to monounsaturated fatty acids was 1.08, underscoring the high nutritional quality of the fat content of the species. The most abundant mineral was calcium. The high K/Na ratio (3.9) and the presence of substantial amounts of phosphorus, iron and zinc makes P. canaliculata snail meat potentially valuable. Thus, the utilization of under-appreciated nutritious food resources could be helpful in mitigating food security problems and in solving nutritional shortcomings in underprivileged parts of the world.

 Discussion

Questions related to the global food security situation of the future are dominated by worries that protein demands might sooner or later outstrip protein supplies, resulting in nutritional deficiencies and health problems (Müller and Krawinkel, 2005). Since for carbohydrates and fats such consequences are not envisaged, it is the protein availability that receives the brunt of attention in the search of alternative food resources. Protein content and availability The freshwater snail, P. canaliculata had a high protein content of 48.5% dry mass. Dominant essential amino acids present were leucine and lysine. The quality of protein as related to human nutritional requirements depends upon the amino acid composition (de Guevara et al., 1995). The presence of a high amount of ketogenic acid was in agreement with studies on uncultured snails like Helix pomatia, Achachatina marginata (Adeyeye and Afolabi, 2004; Ikauniece et al., 2014) or Limicoria sp. and Achatina achatina (Adeyeye and Afolabi, 2004)., A high leucine component was also reported in the range 5–10% from sea fish and carp (Kaushik, 1998; Mohanty et al. 2014). Lysine was the most abundant essential amino -acid in Helix aspersa (Cagiltay et al., 2011).