Resumen.-El cultivo de camarón blanco Litopenaeus vannamei en agua con baja salinidad (1,2 ± 0,5 g L -1 ) y con diferente composición iónica afecta el desempeño de los organismos en cultivo. El efecto de cultivar en agua de baja salinidad con diferente contenido de iones fue evaluado en crecimiento y supervivencia del camarón. Cuatro pozos de diferente composición iónica del agua fueron seleccionados en el Río Sinaloa, Guasave, México, localizados en: (T 1 ) ) como control. El camarón cultivado en T m y T 1 alcanzaron peso promedio superior a 12 g y tasa de supervivencia del 78%, con diferencias significativas a los demás tratamientos de agua de baja salinidad. El factor de condición obtenida con agua de baja salinidad (T 1 = 0,654) fue similar al registrado para T m (0,670), donde las proporciones iónicas (Na/K y Mg/K) fueron similares en ambos. Esta última observación sugiere que las proporciones de los principales iones (Na + , K + , Mg 2+ y Ca 2+ ) juegan un papel relevante para el desarrollo de los organismos bajo cultivo. Cuando la relación iónica fue similar a la del agua de mar, se obtuvieron organismos con el mejor desarrollo, indicando que la proporción de iones mayores fueron importantes para el crecimiento y desempeño del camarón en cultivo. ) presents challenges, the deviation of the ionic composition of water is known that influences the overall condition of the cultured organisms. The effect of water of low salinity with different ion content on the growth and survival of shrimp was determined. First, water was extracted from 4 wells with a depth of 5 to 7 m, located in Sinaloa River Basin in Guasave, Mexico at: (T 1 ) 25.43°N, 108.44°W; (T 2 ) 25.48°N, 108.37°W; (T 3 ) 25.60°N, 108.40°W and (T 4 ) 25.64°N, 108.51°W and were selected on base the different ionic water composition. The experimental design was 4 independent treatments with 3 replicate. Shrimp were grown at sea water (T m = 34 ± 1.4 g L -1) used as a control. Shrimps grown in T m and T 1 had averaged weight (over 12 ± 0.61 g) and survival rates (78%), with statistical differences to others low salinity water treatments. The condition factor obtained with low-salinity water (T 1 = 0.654) was like that recorded for T m (0.670), where ionic ratios (Na/K and Mg/K) were similar to that of seawater. This observation strongly suggests that the ratios of the major ions (Na + , K + , Mg 2+ and Ca 2+ ) play a relevant role for development of organisms under cultivation. Shrimp cultured in water of low salinity with an ionic ratio similar to that of sea water were organisms with the best development under cultivation, therefore indicating that the proportion of major ions were important for shrimp.
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