Manual para el uso de de la tecnología EM en granjas de camarón en Tabasco

Book · August 2009with2,030 Reads

Edition: 1a, Publisher: ECOSUR- FUNDACION PRODUCE TABASCO, Editor: Everardo Barba
  • [Show abstract] [Hide abstract] ABSTRACT: The most common substances used in pond aquaculture are fertilizers and liming materials. Fertilizers are highly soluble and release nutrients that can cause eutrophication of natural waters. Fertilizers are also corrosive and some are highly explosive, so proper handling is necessary to prevent accidents. Some liming materials are caustic and can be hazardous to workers if proper precautions are not exercised. Liming materials do not cause environmental problems, and liming and inorganic fertilizer compounds do not present food safety concerns. An array of other substances is used less frequently in aquaculture including: oxidants, disinfectants, osmoregulators, algicides, coagulants, herbicides, and probiotics. These compounds or biological products quickly degrade or precipitate. They are not bioaccumulative and do not cause environmental perturbations in natural waters receiving pond effluents. Accidental spills of some substances could cause environmental damage. Most substances used in pond aquaculture to improve soil or water quality present little or no risk to food safety. The use of human wastes in aquaculture or the contamination of aquaculture systems with agricultural or industrial pollution could result in product contamination and food safety concerns. Some substances pose safety risks to workers, explosion or fire hazards, or cause mild pollution.
    Full-text · Article · Jun 1999
  • Article · Jan 1969 · Journal of Shellfish Research
  • [Show abstract] [Hide abstract] ABSTRACT: The mass culture of scallops Argopecten purpuratus (Lamarck, 1819) faces serious problems because of high larval mortalities. The main cause of mortality is the presence of pathogenic bacteria belonging to the genus Vibrio. In this study, the potential inhibitory activity against vibrios was examined for a native bacterial strain identified as Alteromonas haloplanktis. This strain clearly suppressed the growth of Vibrio alginolyticus and Vibrio anguillarum, two strains that cause severe mortalities in larval cultures of A. purpuratus. The active inhibitory components were found to be produced during the stationary phase of the culture, and they appear to be sensitive to heat. The inhibitory metabolites were precipitated by ammonium sulphate, and they possibly contained a proteinaceous compound. This is the first report of the isolation of Alteromonas species associated with bivalve culture producing antibiotic substances. This strain is potentially useful as a probiotic in the culture of A. purpuratus.
    Article · Jun 1996
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