Characteristics of Animals Entering an Animal Control or Humane Society Shelter in a Midwestern City

This study compared companion animals entering a humane society shelter with those entering an animal control shelter in the same city, and both to data on companion animals in the area. The study compared stray and relinquished animals. Adult dogs were more numerous than pups, particularly at the Animal Control facility, whereas cats and kittens entered the shelters in roughly equal proportions. Further, the study identified a very small proportion of both cats and dogs as having been altered. Labrador retrievers, German shepherds, chow chows, and rottweilers were the most common breeds at both shelters, and the last three appear to be overrepresented in comparison with their prevalence among owned dogs. Results are discussed in terms of their contribution to understanding local and regional differences in shelter populations and community use of two types of shelters, as well as in terms of the challenges facing Animal Control and Humane Society staff.     

The effect of habitat fragmentation on finescale population structure of wood frogs (Rana sylvatica)

We examined the impact of recent anthropogenic habitat fragmentation on the genetic structure of wood frog (Rana sylvatica) breeding sites in Wellington County of Ontario, Canada. In addition to geographic distance (average pairwise distance ~22 km, greatest distance ~50.22 km), four landscape features hypothesized to contribute to genetic differentiation between breeding sites were considered: road density, a major highway (highway 401), canopy cover, and watershed discontinuity. Analysis of data from 396 samples across nine breeding sites using eight microsatellite DNA loci, revealed a small degree of significant genetic structure between breeding sites. The presence of highway 401 and road density were correlated with small but statistically significant structure observed between several groups of sites. One outlier breeding site outside of Wellington County located within the city of Toronto, had significantly lower allelic richness and much larger population differentiation with the Wellington sites. Our data suggest that recent fragmentation has had an effect on wood frog population structure and also demonstrate the importance of dispersal for this species in maintaining levels of genetic diversity.