Population status of freshwater turtles across a PCB contamination gradient

@article{Gibbs2017PopulationSO,
  title={Population status of freshwater turtles across a PCB contamination gradient},
  author={James P. Gibbs and Shahrokh Rouhani and Leyla Shams},
  journal={Aquatic Biology},
  year={2017},
  volume={26},
  pages={57-68}
}
Remarkably few studies on the effects of PCBs on wild turtles have been conducted. We contrasted population-level parameters of 2 species of freshwater turtles, the snapping turtle Chelydra serpentina and the painted turtle Chrysemys picta, across a strong PCB concentration gradient in the upper Hudson River, New York State, USA. Our study employed standardized capture methods that yielded 465 turtles during 1968 trap-nights over 2 yr (2006 and 2007) at 246 trapping sites. Individuals of both… 

Tables from this paper

References

SHOWING 1-10 OF 67 REFERENCES
Effects of Roads on the Structure of Freshwater Turtle Populations
TLDR
High road density was associated with male-biased sex ratios in painted turtles and snapping turtles, whereas turtle morphology and abundance were not associated with road density, and disproportionate road mortality of females on nesting migrations is the most likely cause of skewed sex ratios.
Accumulation and maternal transfer of polychlorinated biphenyls in snapping turtles of the upper Hudson River, New York, USA
TLDR
The results suggest that PCB contamination of the upper Hudson River presents risks of establishing high body burdens and of maternal transfer of PCBs to eggs, although measures of gross morphology revealed no discernable expression of abnormal sexual development or reproduction.
Demographic Toxicity: Methods in Ecological Risk Assessment
TLDR
This work has shown the utility of metapopulation modeling for prediction and management of hunter risk, and applications of Life-Table Response Experiment to the evaluation of toxicants effects at population level with the polychaete Dinophilus gyrociliatus.
The Influence of Sampling Methods on the Estimation of Population Structure in Painted Turtles
TLDR
This study indicates that even within a species, trapping method introduces considerable bias in the estimation of sex ratio and size-class distribution of painted turtles, as estiimated by different authors.
Population structure and movements of freshwater turtles across a road-density gradient
Understanding interactions between roadways and population structure and movements of wildlife is key to mitigating “road effects” associated with increasing urbanization of the landscape. Aquatic
Factors affecting the density of populations of common snapping turtles (Chelydra serpentina serpentina)
TLDR
A comparison among several populations indicated that density was negatively correlated with latitude and with surface area of suitable habitat, and density and biomass density were significantly higher in habitats of relatively high primary productivity, which tended to be at relatively low latitudes.
High incidence of deformity in aquatic turtles in the John Heinz National Wildlife Refuge.
Community structure and differential responses of aquatic turtles to agriculturally induced habitat fragmentation
TLDR
Responses of aquatic turtles to features at multiple spatial scales in an intensively farmed region of the Midwestern United States are assessed, suggesting differential responses to landscape fragmentation.
Feeding ecology, density and biomass of the freshwater turtle, Phrynops geoffroanus , inhabiting a polluted urban river in south-eastern Brazil
TLDR
The elevated number of turtles and biomass inhabiting this urban river is probably the result of the abundance of sewage and organic waste produced by humans, the absence of predators, and increased availability of nesting areas, which convert this area into an environment highly advantageous for the survival of Geoffroy's side-necked turtle.
...
...