Produção Nacional
Revisado por pares
Acute effects of extreme pH and its influences on the survival and biochemical biomarkers of juvenile White Shrimp, Litopenaeus vannamei
2015; Taylor & Francis; Volume: 48; Issue: 6 Linguagem: Inglês
10.1080/10236244.2015.1086539
ISSN1029-0362
AutoresPlínio Schmidt Furtado, Michelle Midori Sena Fugimura, José María Monserrat, Diego Moreira de Souza, Luciano Garcia, Wilson Wasielesky,
Tópico(s)Aquaculture disease management and microbiota
ResumoThe White Shrimp (Litopenaeus vannamei) is reared in several types of systems. Changes in pH in some can produce sub-lethal effects that result in poor growth and survival. The aim of the present study was to determine the acidic and basic pH 50% lethal limits after 96 h exposure (pH50–96 h) and to evaluate the sub-lethal effects of pH on oxidative stress parameters in juvenile L. vannamei. The experimental design comprised nine treatments with three replications of each. The nine treatments consisted of pH 10.5, 10.0, 9.5, 9.0, 7.0, 5.0, 4.5, 4.0 and 3.5. The treatment at 7.0 was used as the control. The sub-lethal pH tests were: basic pH 9.5, neutral pH 7.0 (control) and acidic pH 4.5. For each experimental pH and sampling point, the hemolymph of six shrimp was collected to determine catalase and glutathione S-transferase's activities and total antioxidant capacity. The values of lethal pH50 at 24, 48, 72 and 96 h for juvenile L. vannamei had basic pH values equal to 9.82, 9.62, 9.59 and 9.58 and acidic pH values of 3.86, 3.92, 3.94 and 4.04, respectively. The shrimp exposed to basic and acidic pH levels showed antioxidant responses with changes in antioxidant activity.
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