The Effect Of Diuron And 3 4 Dichloroaniline On Catfish Pond Microorganisms
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Author | : Michelle Lazette Badon |
Publisher | : |
Total Pages | : 156 |
Release | : 1995 |
Genre | : Fishes |
ISBN | : |
Cyanobacteria (blue-green algae) and actinomycetes are microorganisms in catfish ponds that produce compounds that render catfish off-flavor. Karmex has been suggested as an algicide to help eliminate this problem. Diuron, the active ingredient in karmex, and its major degradative product, 3,4-dichloroaniline (3,4-DCA) were employed to determine the effect of Karmex on the catfish pond ecosystem. The objectives of this research were to determine the effects of diuron and 3,4-DCA on cyanobacteria and geosmin-producing actinomycetes from catfish ponds; microbial processes involved in the carbon, nitrogen and sulfur cycles; several bacterial pathogens of catfish and the fate of diuron and 3,4-DCA in catfish ponds. Neither compound had any obsevable effect on the growth or geosmin-production by actinomycetes. Microbial degraders were not adversaly affected by exposure to the diuron or 3,4-DCA, while lipid degraders were stimulated by the presence of diuron and unaffected by 3,4-DCA. Ammonification, nitrate reduction and denitrification, likewise, were not adversely affected by diuron nor 3,4-DCA. Nitrification was inhibited at diuron concentrations higher than 5 mg/L. Sulfide production was not increased by the presence of diuron or 3,4-DCA. Edwardsiella ictaluri, Pseudomonas fluorescens, Aeromonas hydrophila, and Aeromonas salmonicida, four common bacterial pathogens, were inhibited by diuron and 3,4-DCA. Diuron and 3,4-DCA were rapidly degraded by catfish pond microorganisms.
Author | : Terrill R. Hanson |
Publisher | : |
Total Pages | : 38 |
Release | : 2001 |
Genre | : Aquatic herbicides |
ISBN | : |
Author | : Mississippi. Agricultural and Forestry Experiment Station, State College |
Publisher | : |
Total Pages | : 584 |
Release | : 2000 |
Genre | : Agriculture |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 208 |
Release | : 1970 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 896 |
Release | : 1995 |
Genre | : Dissertation abstracts |
ISBN | : |
Author | : Claude Amiard-Triquet |
Publisher | : Academic Press |
Total Pages | : 519 |
Release | : 2015-06-11 |
Genre | : Science |
ISBN | : 0128011769 |
Aquatic Ecotoxicology: Advancing Tools for Dealing with Emerging Risks presents a thorough look at recent advances in aquatic ecotoxicology and their application in assessing the risk of well-known and emerging environmental contaminants. This essential reference, brought together by leading experts in the field, guides users through existing and novel approaches to environmental risk assessment, then presenting recent advances in the field of ecotoxicology, including omics-based technologies, biomarkers, and reference species. The book then demonstrates how these advances can be used to design and perform assays to discover the toxicological endpoints of emerging risks within the aquatic environment, such as nanomaterials, personal care products, PFOS and chemical mixtures. The text is an invaluable reference for any scientist who studies the effects of contaminants on organisms that live within aquatic environments. Provides the latest perspectives on emerging toxic risks to aquatic environments, such as nanomaterials, pharmaceuticals, chemical mixtures, and perfluorooctane sulfonate (PFOS) Offers practical guidance on recent advances to help in choosing the most appropriate toxicological assay Presents case studies and information on a variety of reference species to help put the ecotoxicological theory into practical risk assess
Author | : Prabhu L. Pingali |
Publisher | : Int. Rice Res. Inst. |
Total Pages | : 678 |
Release | : 1995-09-30 |
Genre | : Business & Economics |
ISBN | : 0792395212 |
The book covers the various aspects of the use of pesticides, their behavior, degradation, and impacts in wetland ricefields, and presents the results of surveys conducted in the Philippines and Thailand. It includes both bibliographic reviews and selected aspects of the experimental results of a research project on pesticide impacts in wetland ricefields. The first phase of the `Pesticide Impact' project was developed in the Philippines from 1989 to 1991. It was a multidisciplinary/collaborative approach involving scientists from IRRI, NRI (England), ORSTOM (France), UPLB (Philippines) who studied the effects of pesticides on the environment and on farmers' health, and the economical aspects of their use.
Author | : David J. Hoffman |
Publisher | : CRC Press |
Total Pages | : 1316 |
Release | : 2002-11-13 |
Genre | : Science |
ISBN | : 142003250X |
Completely revised and updated with 18 new chapters, this second edition includes contributions from over 75 international experts. Also, a Technical Review Board reviewed all manuscripts for accuracy and currency. Focusing on toxic substance and how they affect the ecosystems worldwide, the book presents methods for quantifying and measuring ecotoxicological effects in the field and in the lab, as well as methods for estimating, predicting, and modeling in ecotoxicology studies. This is the definitive reference for students, researchers, consultants, and other professionals in the environmental sciences, toxicology, chemistry, biology, and ecology - in academia, industry, and government.
Author | : John H. Montgomery |
Publisher | : CRC Press |
Total Pages | : 1388 |
Release | : 2010-12-12 |
Genre | : Technology & Engineering |
ISBN | : 9781420032765 |
The latest edition of the bestselling Groundwater Chemicals Desk Reference has been thoroughly updated and expanded. In addition to information concerning the environmental fate and transport in various media, organic priority pollutants and chemicals commonly found in the workplace and the environment, it includes toxicity information for mammals and aquatic species in a clear, consistent format.
Author | : |
Publisher | : |
Total Pages | : 1176 |
Release | : 1987 |
Genre | : Medicine |
ISBN | : |