Journal ArticleDOI
Factors affecting the bioconcentration of hexachlorocyclohexanes in early life stages of Oncorhynchus mykiss
TLDR
The total lipid content seems to play a major role in influencing bioaccumulation parameters but cannot thoroughly explain BCF variability, which must be ascribed to other factors such as life stage and lipid composition.Abstract:
A commercial mixture of α-, β-, γ-, and δ-hexachlorocyclohexane (-HCH) isomers has been tested for bioconcentration on early life stages of Oncorhynchus mykiss. Experimental results were elaborated by means of BIOCON, an interactive program for personal computers that provides bioconcentration factors (BCFs) and kinetic uptake and depuration coefficients as well as their standard deviations. The comparisons performed on a statistical basis evidenced few differences among the bioconcentration capability of larval stages, contrary to what was observed in previous studies with other chemicals. In the early juvenile stage, α- and δ-HCH are characterized by higher BCFs than the γ-isomer. The role of lipids is also investigated. The total lipid content seems to play a major role in influencing bioaccumulation parameters but cannot thoroughly explain BCF variability, which must be ascribed to other factors such as life stage and lipid composition.read more
Citations
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Journal ArticleDOI
Comparison of BCF models based on log P
TL;DR: Seven linear and nonlinear BCF models based on log P have been compared in order to estimate their accuracy, predictive power, and domain of application and it was shown that the bilinear model log BCF was superior to the other studied models.
Journal ArticleDOI
Intraspecies variation in lethal body burdens of narcotic compounds
Annemarie P. van Wezef,Dieuwke A.M. de Vries,Stefan Kostense,Dick T.H.M. Sijm,Antoon Opperhuizen +4 more
TL;DR: In this article, fathead minnows were exposed to different concentrations of di- or trichlorobenzenes, tetrachloroethane or PCBs and the variation in LBB within a population was 4- to 23-fold for the chemicals tested.
Book ChapterDOI
Novel-Type Insecticides: Specificity and Effects on Non-target Organisms
B. Darvas,L. A. Polgár +1 more
TL;DR: A Significant part of the increase in agricultural productivity over the past half century has been due to more efficient and economical pest control, however, there is continuing and growing social and legislative pressure to reduce the ecotoxicological risks of pesticides.
Journal ArticleDOI
Organochlorine Pesticides in Stream Mayflies and Terrestrial Vegetation of Undisturbed Tropical Catchments Exposed to Long-Range Atmospheric Transport
TL;DR: In this paper, the authors investigated whether biota and sediments in river catchments consisting of primary forest in northwestern Costa Rica are contaminated by atmospheric transport of organochlorine pesticides from nearby regions where their use is intense.
Journal ArticleDOI
Examining waterborne and dietborne routes of exposure and their contribution to biological response patterns in fathead minnow (Pimephales promelas).
TL;DR: The results suggest that under environmentally relevant exposure conditions, trophic transfer of metals may lead to greater reproductive effects and increased metal toxicity in fish and indicates that metals are assimilated in tissues differently depending on the quality of the food.
References
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Journal ArticleDOI
Theoretical and experimental relationships between soil adsorption, octanol-water partition-coefficients, water solubilities, bioconcentration factors, and the parachor
Journal ArticleDOI
Differences in susceptibility of early life stages of rainbow trout (Salmo gairdneri) to environmental pollutants
TL;DR: In view of the lack of fish toxicity data, short-term exposure of early fry is a practical approximation in establishing toxicant concentrations acceptable for fish and for compounds having a high bioaccumulative potential the exposure period should also include the sac fry stage.
Journal ArticleDOI
Determination of the bioconcentration potential of marine organisms. — A steady state approach
Book ChapterDOI
Recent state of lindane metabolism.
R. Engst,R. M. Macholz,M. Kujawa +2 more
TL;DR: Since DDT has been legally restricted for use in many countries, among other insecticides lindane has become important as a substitute for DDT.
Book ChapterDOI
Recent state of lindane metabolism. Part II.
R. Engst,R. M. Macholz,M. Kujawa +2 more
TL;DR: After publication of part II of the authors' review in 1979 knowledge about the mechanisms of the metabolism of lindane and the other hexachlorocyclohexane isomers increased rapidly and the identification of new, till now unknown metabolites recedes and the basic research on mechanism of several degradation steps increased.