Minimum environmental potassium for survival of Pacific white shrimp Litopenaeus vannamei (Boone) in freshwater

Minimum environmental potassium for survival of Pacific white shrimp Litopenaeus vannamei (Boone) in freshwater

The effect of three essential osmoregulatory ions (Mg super(2+), K super(+), and SO sub(4) super(2-)) on the short-term survival of Pacific white shrimp Litopenaeus vannamei in freshwater (

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Veröffentlicht in:Journal of shellfish research 2003-06, Vol.22 (1), p.263-267
Hauptverfasser: McGraw, W J, Scarpa, J
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Freshwater
Litopenaeus vannamei
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container_title Journal of shellfish research
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creator McGraw, W J
Scarpa, J
description The effect of three essential osmoregulatory ions (Mg super(2+), K super(+), and SO sub(4) super(2-)) on the short-term survival of Pacific white shrimp Litopenaeus vannamei in freshwater (
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Shrimp postlarvae (PL-18 and -28) were acclimated from seawater (32 ppt) to freshwater (700 ppm TDS; 280 ppm Cl super(-)) over 48 h and held for an additional 24 h before being placed in treatment solutions. Treatments consisted of various Mg super(2+), K super(+), and SO sub(4) super(2-) concentrations in Na super(+) and Ca super(2+) solutions that were all derived from chloride or sodium based chemicals added to distilled water. Ten shrimp were placed in triplicate 4-L plastic containers holding 2 L of treatment solutions for 24-48 h. Potassium was found to significantly (P &lt; 0.05) increase shrimp survival, whereas Mg super(2+) and SO sub(4) super(2-) had no effect. Solutions with K super(+) exhibited an average increase in survival of 20% and 42% above solutions without K super(+) at 24 and 48 h, respectively. This study demonstrates the necessity of K super(+) in "freshwater" at a minimum concentration of 1 ppm for the survival of this euryhaline marine shrimp. 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subjects Freshwater
Litopenaeus vannamei
title Minimum environmental potassium for survival of Pacific white shrimp Litopenaeus vannamei (Boone) in freshwater
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