Share This Author
Agrochemicals increase trematode infections in a declining amphibian species
It is shown that the widely used herbicide, atrazine, was the best predictor of the abundance of larval trematodes in the declining northern leopard frog Rana pipiens, and analysis of field data supported a causal mechanism whereby both agrochemicals increase exposure and susceptibility to larval Trematodes by augmenting snail intermediate hosts and suppressing amphibian immunity.
RELATIONSHIP OF TADPOLE STAGE TO LOCATION OF ECHINOSTOME CERCARIAE ENCYSTMENT AND THE CONSEQUENCES FOR TADPOLE SURVIVAL
Exposures of metamorphic frogs to cercariae revealed that these individuals can become infected with echinostomes, and highlighted the host stage–dependent dynamics of tadpole–echinostome interactions.
Forms and prevalence of intersexuality and effects of environmental contaminants on sexuality in cricket frogs (Acris crepitans).
In cricket frogs, sex ratios and the prevalence of intersex gonads are altered by environmental contamination, and a significant relationship between sex-ratio reversal and contamination with PCBs and PCDFs is revealed.
Identification of 12 hepatotoxins from a Homer Lake bloom of the cyanobacteria Microcystis aeruginosa, Microcystis viridis, and Microcystis wesenbergii : nine new microcystins
Naming of cyclic heptapeptide toxins of cyanobacteria (blue-green algae).
CONCENTRATIONS AND INTERACTIONS OF SELECTED ESSENTIAL AND NON-ESSENTIAL ELEMENTS IN BOWHEAD AND BELUGA WHALES OF ARCTIC ALASKA
- Victoria M. Woshner, T. O'hara, G. Bratton, R. Suydam, V. Beasley
- Environmental ScienceJournal of wildlife diseases
- 1 October 2001
This study found hepatic Hg:Se molar ratios to be consistently lower than unity and different between species, and possible explanations for observed elemental correlations and ancillary mechanisms of Cd and Hg detoxification are discussed.
Alteration of tissue and serum sphinganine to sphingosine ratio: an early biomarker of exposure to fumonisin-containing feeds in pigs.
The results of this study show that free sphinganine is elevated in liver, lung, and kidney, from pigs consuming feeds containing fumonisin concentrations of 23 ppm or greater, and this supports the hypothesis that inhibition of sphingosine and sphingAnine N-acyltransferase plays an important role in the pathogenesis of animal diseases associated with consumption of feed containing fUMonisins.
Effects of atrazine on amphibian growth and survival in artificial aquatic communities
The decrease in amphibian length and weight at metamorphosis may indicate a reduction in fitness in wild populations of anurans exposed to atrazine at 200 to 2,000 mg/L.
Improved method for purification of toxic peptides produced by cyanobacteria.