Effects of zinc and cadmium on oxygen consumption and ammonium excretion in pink shrimp (Farfantepenaeus paulensis, Pérez-Farfante, 1967, Crustacea)

Abstract

In Brazil, pink shrimp (Farfantepenaeus paulensis) is an important commercially exploited species and is an ideal animal for studying the impairment caused by the effects of heavy metals that are often detected in coastal areas. The main purpose of the present study was to detect the acute toxicity of cadmium and zinc to F. paulensis and investigate their effects on oxygen consumption and ammonium excretion, investigations that have not been carried out in this species before. First, the acute toxicity of zinc and cadmium to F. paulensis for 24, 48, 72, and 96 h--medium lethal concentration was examined, which resulted in the following values: 9.39, 6.00, 4.88, and 3.31 mg/l for zinc and 2.35, 1.67, 1.26, and 0.83 mg/l for cadmium. Furthermore, we also found that exposure of shrimp to zinc and cadmium caused an inhibition in oxygen consumption of 25 and 32.4%, respectively, relative to the control. In addition, after separate exposure to cadmium and zinc, elevations in ammonium excretion were obtained, which were 42.85 and 51.85% higher than the control, respectively.

Análise da ocorrência de metais: Ni, Zn, Cu, Pb e Cd em ostras (Crassostrea brasiliana) e sedimentos coletados no Estuário de Cananeia-SP (Brasil)

“…Apesar de haver uma maior concentração de Pb nos sedimentos do que nas ostras quando em comparação ao Zn, deve-se levar em consideração que a retenção e absorção do Chumbo no trato respiratório dos moluscos estão ligadas a diversos fatores que devem ser considerados, e, entre outros, pode-se mencionar a salinidade, higroscopicidade, concentração, fase larval, ritmo respiratório e duração da exposição 11,12,13,14 . Para o gastrópode Thiara tuberculata exposto a metais (mercúrio e cobre), com o aumento da salinidade, houve uma diminuição da toxicidade, refletida pela diminuição do consumo de oxigênio 8 , o mesmo constatado em Barbieri e Paes 15 para a espécie de camarão L. schmitti, em relação ao Pb.…”

Acute Toxicity of Cadmium on Gene Expression Profiling of Fleshy Shrimp, Fenneropenaeus Chinensis Postlarvae Using a cDNA Microarray

“…특히 유전자의 전사과정이나 생체막의 수송과 같은 생리적인 과정의 전 반에 영향을 미치는 것으로 알려져 있고 (Maroni 등, 1986), 갑각류에서는 대사활동을 비롯한 많은 생리학적 변화가 일어난다고 보고되고 있다 (Barbieri 등, 2005;Barbieri, 2009) .…”

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“…Among these, zinc and cadmium are common and are known for their deleterious effects on aquatic crustaceans Chen, 2004, 2005;Barbieri, 2009) and it has been shown that, although L. vannamei may regulate its internal Zn concentration, the combination of Zn with other metals may have synergic or antagonistic effects (Nuñez-Nogueira et al, 2012). These effects should be studied in detail, because different organisms and even different tissues of the same organism may show different responses to metal mixtures (Norwood et al, 2003;Serafim and Bebianno, 2010).…”