Sampling

Freshwater ecosystems have been degraded and lost over time due to a variety of anthropogenic stressors. Within the Great Plains of North America, the agriculturalization of the landscape has led to the widespread degradation and loss of aquatic habitat. Oxbows are naturally occ…

This dissertation assesses the use of respondent-driven sampling (RDS) in HIV epidemiological surveys among most-at-risk populations (MARPs, e.g., injection drug users [IDUs], men who have sex with men) in international settings. Recruiting representative samples of MARPs for HI…

This dissertation is composed of projects on three aspects of gathering and learning from data in the social sciences: drawing representative samples, taking valid measurement, and making warranted inductive inferences.

Understanding the physiology of baleen whales is critical for their effective management and conservation but sampling free-living whales is exceedingly difficult. To overcome this issue, baleen was used to analyze hormone and mercury patterns, allowing for multi-year retrospect…

Walleye Stizostedion vitreum recruitment in some northern Wisconsin lakes has declined because of recruitment bottlenecks occurring at or before mid-July and these declines have coincided with increases in adult Largemouth Bass Micropterus salmoides abundance. Increased abundanc…