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Effects of ionic composition on growth and survival of white shrimp Litopenaeus vannamei culture at low-salinity well water

Authors

CORRESPONDING

Wenceslao Valenzuela-Quiñónez

wvalenzuela@ipn.mx

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Instituto Politécnico Nacional-CIIDIR Unidad Sinaloa, Departamento de Acuacultura, Boulevard Juan de Dios Batís Paredes # 250, Guasave, Sinaloa 81101, México

Ismael E. Valenzuela-Madrigal

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Maestría en Recursos Naturales y Medio Ambiente Program Student, Instituto Politécnico Nacional-CIIDIR Unidad Sinaloa, México

Héctor M.Esparza-Leal

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Instituto Politécnico Nacional-CIIDIR Unidad Sinaloa, Departamento de Acuacultura, Boulevard Juan de Dios Batís Paredes # 250, Guasave, Sinaloa 81101, México

Gerardo Rodríguez-Quiroz

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Instituto Politécnico Nacional-CIIDIR Unidad Sinaloa, Departamento de Acuacultura, Boulevard Juan de Dios Batís Paredes # 250, Guasave, Sinaloa 81101, México

E. Alberto Aragón-Noriega

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Centro de Investigaciones Biológicas del Noroeste, Unidad Sonora. Km 2.35 Camino al Tular, Estero Bacochibampo, Guaymas, Sonora 85454, México

Abstract

The culture of white shrimp Litopenaeus vannamei in low salinity waters (1.2 ± 0.5 g L-1) 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: (T1) 25.43°N, 108.44°W; (T2) 25.48°N, 108.37°W; (T3) 25.60°N, 108.40°W and (T4) 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 (Tm= 34 ± 1.4 g L-1) used as a control. Shrimps grown in Tm and T1had 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 (T1= 0.654) was like that recorded for Tm(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+, Mg2+ and Ca2+) 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.

Key words

Litopenaeus vannamei, ionic composition, low-salinity well water

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