Notes on the Amphibians of Venango County, Pennsylvania

  title={Notes on the Amphibians of Venango County, Pennsylvania},
  author={Paul Loren Swanson},
  journal={American Midland Naturalist},
  • P. Swanson
  • Published 1 September 1948
  • Environmental Science
  • American Midland Naturalist
Venango County is situated about midway between Pittsburgh and Erie. Much of its 675 square miles has been glaciated, and the general topography is hilly. The Allegheny River flows through the county, and, with its tributaries, has cut deep valleys in the original plateau. The lowest elevation is about 870 feet above sea level, and the highest point just under 1600 feet. The average last killing frost of the winter falls on May 16, and the first killing frost in the fall, October 3. This makes… 

Life History of the Hellbender, Cryptobranchus alleganiensis, in a West Virginia Stream

Abstract Though locally abundant throughout the high mountains of West Virginia, intensive studies on the natural history and population structure of the hellbender, Cryptobranchus alleganiensis,

Some Aspects of the Ecology of the Hellbender, Cryptobranchus Alleganiensis Alleganiensis, in a Pennsylvania Stream1

Hellbenders were most abundant in relatively shallow rapids areas and utilized large rocks for cover and defense under a cover rock and showed a tendency to home upstream or downstream after displacement.

Diurnal Seasonal Activity of Cryptobranchus alleganiensis (Hellbender) in North Carolina

Hellbenders from Transylvania County, NC were most diurnally active during the September breeding season, but also exhibited high levels of diurnal activity during summer months, especially in May, which was positively correlated with water temperature.

Conserving the Eastern Hellbender Salamander

Through a mail survey of 541 residents and riparian landowners in the area surrounding the Blue River watershed of southern Indiana, we examined perceptions and intended behaviors toward the eastern

Abnormalities in the Ozark Hellbender {Cryptobranchus alleganiensis bishopi ) in Arkansas: A Comparison between Two Rivers with a Historical Perspective

An increasing trend of hellbenders exhibiting unusual morphological problems is illustrated and this study stresses the need for inclusion of abnormalities observed in field data in order to encourage proactive conservation effort within this species.

A quantitative field study of paternal care in Ozark hellbenders, North America’s giant salamanders

  • Rachel A. SettleJeffrey T. BrigglerA. Mathis
  • Environmental Science
    Journal of Ethology
  • 2018
Paternal care is relatively uncommon in tetrapods but appears to be the rule in the large aquatic salamanders of the primitive family Cryptobranchidae (North America: hellbenders, genus

Amphibians and Reptiles

Documentation of Cryptobranchus alleganiensis alleganiensis (Eastern Hellbender) Predation on Nest-Associate Stream Fishes

The first video documentation of in situ predation by a hellbender on a spawning aggregation of stream fishes is provided, demonstrating that Eastern Hellbenders will modify behavior to exploit stream fishes when prey are easily captured.

An Evaluation of Known and Potential Sampling Techniques for Hellbender, Cryptobranchus alleganiensis

Three known techniques, variations of visual search and capture by hand or nets, and two potential techniques utilizing electroshocking were evaluated for their effectiveness and efficiency in capturing hellbenders in the Allegheny River drainage, northwestern Pennsylvania.