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Life Sciences Commons

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1994

Management

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Articles 31 - 32 of 32

Full-Text Articles in Life Sciences

Proceedings - Ecology And Management Of Annual Rangelands, United States Department Of Agriculture, Forest Service Jan 1994

Proceedings - Ecology And Management Of Annual Rangelands, United States Department Of Agriculture, Forest Service

Plants

Annual weeds continue to expand throughout the West eliminating many desirable species and plant communities. Wildfires are now common on lands infested with annual weeds, causing a loss of wildlife habitat and other natural resources. Measures can be used to reduce burning and restore native plant communities, but restoration is difficult and costly.


Evidence For A Relation Between A White Perch Young-Of-The-Year Index And Indices Of Later Life Stages, Thomas C. Mosca Iii, Herbert Austin, David M. Plotner Jan 1994

Evidence For A Relation Between A White Perch Young-Of-The-Year Index And Indices Of Later Life Stages, Thomas C. Mosca Iii, Herbert Austin, David M. Plotner

Reports

Juvenile indices are employed in fisheries management to predict the future relative abundance of harvestable adults and to monitor the success of management efforts. Frequently, regulations controlling utilization of the resource, and a lack of fishery independent abundance data, make verification of the prediction impossible. In the case of white perch (Morone americana) in Virginia, this is not so. Using the weighting system developed for a Chesapeake Bay-wide index of juvenile striped bass abundance based on summertime beach seine data collected in nursery ground waters, we developed a similar index for white perch in the Virginia portion of the Bay. …