texto cientifico

Evaluación de la calidad bacteriológica del alimento vivo (Artemia, Daphnia, Tenebrio y Tubifex) para peces en los sitios de su recolección, producción y venta
Bacteriological quality evaluation oflive food (Artemia, Daphnia, Tenebrio and Tubifex) for fishes in collection, production and selling sites
Pilar Negrete Redondo* Carmen Monroy Dosta* Jorge Romero Jarero**
* Universidad AutónomaMetropolitana–Unidad Xochimilco, Departamento El Hombre y su Ambiente, Calzada del Hueso 1100, Col. Villa Quietud, 04950, México, D. F.
** Instituto de Ciencias del Mar y Limnología, UniversidadNacional Autónoma de México, 04510, México, D. F.
Recibido el 8 de marzo de 2007
Aceptado el 14 de marzo de 2008.
Abstract
Cichlids constitute the group of fishes of greatest importance for ornamentalaquaculture. To increment the production of these species, producers have to satisfy the metabolic necessities that will give to the fish greater tolerance to the variations in the physicochemicalfactors of their surroundings, as well as resistance to diseases. Aquaculturists include live food as part of their diet for its high protein content, mainly in their first development phases. Theorganisms of greatest use in aquaculture as live food are: Artemia, Daphnia, Tubifex and Tenebrio; nevertheless, and in spite of being a probable source of ichthiopathogenic contamination, the bacterialcharge they carry is not considered, which is incorporated to the culture system with the food. For this reason, in the present study a diagnosis of the sanitary conditions of live fish food management:Artemia, Daphnia, Tubifex and Tenebrio, during its collection, production and selling process was done. A qualitative and quantitative analysis on the bacterial charge in each one of these foods wasperformed. The isolated strains, in different specific microbiological agars, were purified and identified using API–20E and API– 20NE systems. To establish the significant difference between sanitary...