Bioensayo de toxicidad con Artemia franciscana (Crustacea-Branchiopoda) en extractos de sedimento superficial del golfo de Guacanayabo, Cuba.
nº38 [Marzo 12- Octubre 12] Retel21/07/2012
Onelio Carballo Hondal1, Gustavo Arencibia-Carballo1, Mercedes Isla Molledalo1, Consuelo González2, González Triana2, Nereida Mantilla Gattorno2
1Centro de Investigaciones Pesqueras. 5ta Ave y 246. Playa.
C.P. 19100. La Habana. Cuba. onelio@cip.telemar.cu
2Centro para la Producción de Animales de Laboratorio. La Habana. Cuba.
C.P. 19100. La Habana. Cuba. onelio@cip.telemar.cu
2Centro para la Producción de Animales de Laboratorio. La Habana. Cuba.
Resumen
La determinación de la toxicidad sigue siendo una herramienta importante y determinante para los estudios de la calidad ambiental de los sedimentos marinos y en la selección de sitios para el cultivo de especies marinas en la industria pesquera. En este trabajo se presenta la evaluación de nueve extractos de sedimento superficial colectados de nueve estaciones seleccionadas de la cuenca hidrológica Cauto del golfo de Guacanayabo, provincia Granma, Cuba. Se determino la toxicidad utilizando el bioensayo de toxicidad con Artemia franciscana en 48 horas según la metodología de la norma mexicana NMX-AA-110-1995-SCFI (1996) adaptada a nuestras condiciones. Los resultados obtenidos mostraron toxicidad significativa en sedimento correspondiente a la zona de Yarey del rio Cauto con respecto al control, resultando en el grupo cuatro un 96 % de supervivencia, en el grupo cinco un 80 % de supervivencia y en el grupo seis un 50 % de supervivencia en las diferentes concentraciones. En el bioensayo se utilizó como control positivo de referencia el dicromato de potasio (K2Cr2O7), comportándose en el rango reportado en la literatura. Los resultados abren un nuevo camino para el uso de este organismo en la valoración de la calidad del sedimento en nuestro país.
Palabras claves: Bioensayo, toxicidad, Artemia, sedimentos, río Cauto.
Descargar Archivo PDF (326 KB)
Palabras claves: Bioensayo, toxicidad, Artemia, sedimentos, río Cauto.
Descargar Archivo PDF (326 KB)
Abstract
Toxicity bioassay with Artemia franciscana (Crustacea, Branchiopoda) in surface sediment extracts from the Guacanayabo Gulf, Cuba.
The determination of toxicity is still an important and determining tool for the studies of environmental quality of marine sediments, as well as for the selection of the sites to harvest marine species within the fishing industry. The present paper shows the assessment of nine extracts of superficial sediment, collected from nine stations that were selected from the Cauto Hydrological Basin in the Guacanayabo Gulf, Granma province, Cuba. Toxicity was determined by means of the toxicity assay with Artemia franciscana in 48 hours, according to the methodology of the Mexican regulation , NMX-AA-110-1995-SCFI (1996), adapted to the Cuban conditions. The results showed a significant toxicity in the sediments of the area of Yarey, Cauto river, in relation to control, the group four resulting in a survival rate of 96%, group five with 80%, and group six with 50%, at the different concentrations. During the bioassay potassium dichromate (K2 Cr2O7) was used as positive control of reference, which behaved in the ranged reported in the literature. The results paved a new way for the use of this organism in the assessment of the quality of the Cuban sediment.
Key words: Bioassay, toxicity, Artemia, sediments, Cauto river.
Download PDF (326 KB)
The determination of toxicity is still an important and determining tool for the studies of environmental quality of marine sediments, as well as for the selection of the sites to harvest marine species within the fishing industry. The present paper shows the assessment of nine extracts of superficial sediment, collected from nine stations that were selected from the Cauto Hydrological Basin in the Guacanayabo Gulf, Granma province, Cuba. Toxicity was determined by means of the toxicity assay with Artemia franciscana in 48 hours, according to the methodology of the Mexican regulation , NMX-AA-110-1995-SCFI (1996), adapted to the Cuban conditions. The results showed a significant toxicity in the sediments of the area of Yarey, Cauto river, in relation to control, the group four resulting in a survival rate of 96%, group five with 80%, and group six with 50%, at the different concentrations. During the bioassay potassium dichromate (K2 Cr2O7) was used as positive control of reference, which behaved in the ranged reported in the literature. The results paved a new way for the use of this organism in the assessment of the quality of the Cuban sediment.
Key words: Bioassay, toxicity, Artemia, sediments, Cauto river.
Download PDF (326 KB)