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Home Range and Habitat Selection of Spotted Owls in the Central Sierra Nevada
ABSTRACT We studied home range and habitat selection of radio-marked adult California spotted owls (Strix occidentalis occidentalis) randomly selected from among the breeding population of owls in…
Obligate crayfish burrow use and core habitat requirements of crawfish frogs
To protect crawfish frog populations, a buffer of at least 1.2 km is recommended around each breeding wetland, and at least 3 critical habitat elements must be present: 1) extensive grasslands maintained by prescribed burning and/or logging, 2) an adequate number of upland crayfish burrows, and 3) no soil disturbance of the sort that would destroy cray fish burrow integrity.
De-centring the ‘big picture’: The Origins of Modern Science and the modern origins of science
Like it or not, a big picture of the history of science is something which we cannot avoid. Big pictures are, of course, thoroughly out of fashion at the moment; those committed to specialist…
Geographic Patterns of Song Similarity in the Dickcissel (Spiza Americana)
- D. Schook, Michael D. Collins, W. Jensen, Perry J. Williams, N. Bader, T. Parker
- Environmental Science
- 1 October 2008
Abstract Song sharing among neighboring males is a well-known, frequent outcome of song learning in oscine passerines and some other groups, but only limited investigations of the spatial scale of…
Surveying a Threatened Amphibian Species through a Narrow Detection Window
- Perry J. Williams, Nathan J. Engbrecht, J. Robb, Vanessa C. K. Terrell, M. Lannoo
- Environmental ScienceCopeia
- 1 October 2013
Crawfish Frogs (Lithobates areolatus) are a relatively widespread but understudied North American species suspected to be in steep decline. Discussions to petition this species for federal listing…
Estimating Reproduction and Survival of Unmarked Juveniles Using Aerial Images and Marked Adults
- Perry J. Williams, Cody Schroeder, P. Jackson
- Environmental ScienceJournal of Agricultural, Biological and…
- 22 February 2020
The objective was to leverage the dependency between juveniles and adults and develop a framework for estimating reproductive rates, juvenile survival, and detection probability using repeated observations of marked adult animals with known fates, but imperfect detection probability, and unmarked juveniles with unknown fates.
Habitat Selection by Crawfish Frogs (Lithobates areolatus) in a Large Mixed Grassland/Forest Habitat
Examination of breeding dispersal, burrow-use characteristics, and burrow habitat selection by Crawfish Frogs in two distinct vegetation types in southeastern Indiana suggested that habitat selection occurred hierarchically; in mixed grassland/forest habitats, they firstselected areas with low canopy cover, and then selected areas with many available burrows.
Is there Hope for the Hoosier Frog? An Update on the Status of Crawfish Frogs (Lithobates Areolatus) in Indiana, with Recommendations for their Conservation
Crawfish Frogs (Lithobates areolatus) are a State Endangered species that have experienced declines through much of their range in Indiana. We conducted surveys at nine historical sites and…
The Laboratory Revolution in Medicine
The laboratory revolution in medicine as rhetorical and aesthetic accomplishment as well as the fall and rise of professional mystery and the emergence of laboratory medicine in nineteenth-century America are examined.
Strong Site Fidelity and a Variety of Imaging Techniques Reveal Around-the-Clock and Extended Activity Patterns in Crawfish Frogs (Lithobates areolatus)
The use of imaging techniques that take advantage of these frogs' dependence on burrows and use of burrow entrances has allowed the first time to observe circumdiel activity patterns and long periods of surface activity in crawfish frogs.