Abstract
Marine bivalves are a very important food source for human consumption, and species that has not been of traditional use as a fishery resource are gaining interest. Seasonal variation in proximate composition, condition index and energy or caloric content of the mussel Tagelus peruvianus were studied in the Gulf of Nicoya, Puntarenas, Costa Rica. From November 2007 to October 2008, a total of 35 to 40 specimens per month were collected. The proximate composition using the AOAC methods was determined. Results showed that the condition index during December, January and May decreased, indicative of two spawning periods and one gonadal resting phase. Soft tissues were respectively characterized by protein (61.9 +/- 4.3%), carbohydrates (15.7 +/- 2.4%), ash (14.0 +/- 1.9%) and lipids (8.5 +/- 1.7%). The average caloric content was 5.0 +/- 0.1 kcal/g. The results showed that the decrease in protein and fat percentage, and calories content, occurred during the spawning seasons. We suggest that T. peruvianus has an optimal nutritional value for human consumption because of the low-fat and moderate protein content.
Highlights
La demanda por alimentos ricos en proteína es cada vez mayor, especialmente en países en desarrollo y subdesarrollo, lo cual estimula la exploración de recursos no tradicionales (Heather & Benkendorff 2008)
Los bajos porcentajes de lípidos y proteína calculados durante los periodos de desove coincidieron con los resultados obtenidos en otros estudios como los de Peiters et al (1980), Davis & Wilson (1983), Bressan & Marín (1985) y Cruz & Villalobos (1993), indicando que éstos nutrimentos son importantes constituyentes orgánicos de los ovocitos (Lucas & Benninger 1985)
La extracción del mejillón Tagelus peruvianus representa una actividad económica complementaria de los pescadores artesanales, es una de las especies de mayor pesca y consumo ya que son una fuente importante de proteína, minerales y vitaminas esenciales para la población humana
Summary
La demanda por alimentos ricos en proteína es cada vez mayor, especialmente en países en desarrollo y subdesarrollo, lo cual estimula la exploración de recursos no tradicionales (Heather & Benkendorff 2008). Los extractos libres de nitrógeno (ELN) fueron calculados por diferencia de la suma de lípidos totales, proteína bruta y cenizas.
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