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184617 results.

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Page 2967, results 74151 - 74175

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Not all publications have extents, not all extents are completely accurate
Differential use of a wolf, Canis lupus, pack territory edge and core
L.D. Mech, E. K. Harper
2002, Canadian Field-Naturalist (116) 315-316
Based on 418 radio-locations of a Minnesota wolf pack, wolves were found at significantly fewer locations per area in the outer 2 km of the territory than in the core. This finding supports an hypothesis that buffer zones exist between pack territories and may explain why prey survive longer there....
Seasonal comparisons of sea ice concentration estimates derived from SSM/I, OKEAN, and RADARSAT data
Gennady I. Belchansky, David C. Douglas
2002, Remote Sensing of Environment (81) 67-81
The Special Sensor Microwave Imager (SSM/I) microwave satellite radiometer and its predecessor SMMR are primary sources of information for global sea ice and climate studies. However, comparisons of SSM/I, Landsat, AVHRR, and ERS-1 synthetic aperture radar (SAR) have shown substantial seasonal and regional differences in their estimates of sea ice...
Records of northern mockingbird, Mimus polyglottos, occurrences in North Dakota during the Twentieth Century
L.D. Igl, R.E. Martin
2002, Canadian Field-Naturalist (116) 87-97
The Northern Mockingbird (Mimus polyglottos) is a common bird in the southern United States that has been expanding its breeding range into the northern United States and southern Canada. During the twentieth century, there were 128 reports of Northern Mockingbird occurrences in North Dakota, including 106 reports during the breeding...
Instream flows for riverine resource stewardship
T. Annear, I. Chisholm, H. Beecher, A. Locke, P. Aarrestad, N. Burkardt, C. Coomer, C. Estes, J. Hunt, R. Jacobson, G. Jobsis, J. Kauffman, J. Marshall, K. Mayes, C. Stalnaker, R. Wentworth
2002, Book
No abstract available....
Effects of fire and post-fire salvage logging on avian communities in conifer-dominated forests of the western United States
N.B. Kotliar, S.J. Hejl, R.L. Hutto, V. Saab, Cynthia Melcher, M.E. McFadzen
T.L. George, D.S. Dobkin, editor(s)
2002, Book chapter, Effects of habitat fragmentation on birds in western landscapes: contrasts with paradigms from the eastern United States (Studies in Avian Biology No. 25)
Historically, fire was one of the most widespread natural disturbances in the western United States. More recently, however, significant anthropogenic activities, especially fire suppression and silvicultural practices, have altered fire regimes; as a result, landscapes and associated communities have changed as well. Herein, we review current knowledge of how fire...
Sea otter population structure and ecology in Alaska
James L. Bodkin, Daniel H. Monson
2002, Arctic Research of the United States (16) 31-35
Sea otters are the only fully marine otter. They share a common ancestry with the Old World land otters, but their route of dispersal to the New World is uncertain. The historic range of the species is along the northern Pacific Ocean rim, between central Baja California and the islands...
Interspecific interactions in trematode communities
Kevin D. Lafferty
E.E. Lewis, J.F. Campbell, M.V.K. Sukhdeo, editor(s)
2002, Book chapter, The behavioral ecology of parasites
This chapter reviews the behavioural ecology of trematodes, focusing on intramolluscular stages. Interspecific competitive interactions, their frequency, dominance hierarchies and resolutions are discussed. Strategies employed by larval trematode species to adapt to a hostile, competitive environment, how these adaptations shape larval trematode communities, and how altered trematode communities can affect...