James E. Christensen

Social groups and the meanings of outdoor recreation activities.

ABSTRACTIndividuals studying leisure behavior have focused attention on the social group as a potentially important determinant of outdoor recreation activity. Presently, however, little is known a...

Social and Attitudinal Variants In High and Low Use of Outdoor Recreational Facilities

Group affiliation and attitudes toward leisure and expansion of recreation facilities were important to the level of participation in outdoor recreation, although these variables have not been used...

Use of Erythrocyte Measurements to Identify Triploid Saugeyes

Abstract The use of erythrocyte size measurements as a possible alternative to flow cytometry for identifying triploid saugeyes (female walleye Stizostedion vitreum × male sauger S. canadense) was evaluated. Blood smear preparations were made from 32 heat-shocked saugeyes (1.0-42.7 g; 52-185 mm total length), which consisted of 12 diploids and 20 triploids, as determined by flow cytometry after blood cells were stained with propidium iodide. The length, width, surface area, and volume of the cell and nucleus of 100 erythrocytes were determined for each fish. The cell and nuclear dimensions were measured at 1,000× magnification with a calibrated ocular micrometer. Discriminant analysis was used to distinguish diploids and triploids based on their score profiles. Results showed that triploid saugeyes had significantly larger erythrocyte cell and nucleus measurements than their diploid counterparts (N = 32; P < 0.0001). Erythrocyte measurements correctly distinguished 93.8% of fish samples as diploids or tri...

Factors influencing outdoor recreation participation: a state study.

Data were collected in 1984 from a sample of Ohio residents to evaluate the merits of a theoretical perspective derived from discussions focused on the role of early life experiences, personal comm...

The relationship between biophysical and social setting factors in the recreation opportunity spectrum.

Abstract Descriptions of the relationships between the setting components (biophysical and social) of the recreation opportunity spectrum can be taken to be unidimensional and linear. Data on biophysical and social setting preferences of campers were used to test whether campers’ preferences reflect linear arrangements of components or whether relationships are more complex. The results indicate that there are multiple linear and nonlinear relationships between biophysical and social setting conditions. This finding has important implications for the application of ROS as an inventory, allocation, and management system. Future research on experience‐setting relationships should consider the multiple relationships between setting components.

Principal components-like procedures for cross-tabulated recreation data: an illustration from search activity related to park choice.

Abstract A principal components‐like method for analyzing cross‐tabulated recreation data is illustrated. Application of the proposed method is to data concerned with information search by re creationists selecting an urban park in which to recreate. The advantages of the methodology introduced over the usual methods for analyzing recreation data in cross‐classification tables are illustrated.