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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 29, No. 4, 2011, pp. 467-473
Bioline Code: zt11041
Full paper language: English
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 29, No. 4, 2011, pp. 467-473

 en Effect of different salinities on growth and survival of the juvenile prawn Macrobrachium tenellum check for this species in other resources (Smith, 1871)
Vega-Villasante, Fernando; Galavíz-Parada, Juan D.; Guzmán-Arroyo, Manuel; Flores Zepeda, Carlos A. & Espinosa-Chaurand, Luis D.

Abstract

The effect of different salinities on growth and survival of juveniles of the prawn Macrobrachium tenellum check for this species in other resources was studied. The different treatments consisted in placing the organisms at 0, 5, 10, 15, 20, 25, 30, 35 and 40 ups by triplicate in glass tanks (10 org / tank) for a period of 40 days. Balanced feed for shrimp 35% PC was supplied daily at a rate of 10% of the total living biomas per tank. The treatments with 0 and 10 ups showed 100% survival. Total mortality of the prawns was observed from 35 ups and higher. The prawns in treatment at 10 ups had a total weight gain (0,229±0,001 g), TCE (1,54±0,01) and IP (84,98±0,36%) which were significantly higher than the other treatments (P<0,05). A reduction of these parameters was observed as salinity increased. The potential isosmotic point for juvenile M. tenellum, under the conditions stated, is about 10 ups.

Keywords
Macrobrachium, salinity, isosmotic point, euryhaline, specific growth rate.

 
 es Efecto de diferentes salinidades sobre el crecimiento y supervivencia de juveniles del langostino de río Macrobrachium tenellum check for this species in other resources (Smith, 1871)
Vega-Villasante, Fernando; Galavíz-Parada, Juan D.; Guzmán-Arroyo, Manuel; Flores Zepeda, Carlos A. & Espinosa-Chaurand, Luis D.

Resumen

Se analizó el efecto de diferentes concentraciones salinas sobre el crecimiento y supervivencia de juveniles del langostino Macrobrachium tenellum check for this species in other resources (Smith, 1871). Los diferentes tratamientos consistieron en someter a los organismos a 0, 5, 10, 15, 20, 25, 30, 35 y 40 ups por triplicado en unidades experimentales (UE) (30 L) (10 org/UE) durante un periodo de 40 días. Se suministró alimento a los organismos con alimento balanceado para camarón marino 35% PC a una tasa de 10% de la biomasa total viva por UE. Los tratamientos con 0 y 10 ups presentaron el 100% de supervivencia. La mortalidad total (100%) de los langostinos fue registrada en los tratamientos de 35 y 40 ups. Los organismos del tratamiento a 10 ups tuvieron un aumento de peso total (0,229±0,001 g), TCE (tasa de crecimiento específi co) (1,54±0,01) e IP (incremento en peso) (84,98±0,36%)que resultaron ser significativamente mayores que los otros tratamientos (P<0,05). Se observó una disminuciónde estos parámetros conforme se incrementó la salinidad. El punto isosmótico potencial para juveniles de M.tenellum, bajo las condiciones establecidas, se encuentra en torno a 10 ups.

Palabras-clave
Macrobrachium, salinidad, punto isosmótico, eurihalino, tasa de crecimiento específica.

 
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