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Full-Text Articles in Life Sciences

Population Fluctuations And Distribution Of Staging Eared Grebes (Podiceps Nigricollis) In North America, Anthony J. Roberts, Michael R. Conover, John Luft, John Neil Oct 2013

Population Fluctuations And Distribution Of Staging Eared Grebes (Podiceps Nigricollis) In North America, Anthony J. Roberts, Michael R. Conover, John Luft, John Neil

Wildland Resources Faculty Publications

Eared Grebes (Podiceps nigricollis Brehm, 1831) use saline ecosystems throughout much of their life cycle, and greater than 90% of the North American population stage during fall at two hypersaline lakes. At one of these lakes, Great Salt Lake (GSL), Utah, a commercial harvest of brine shrimp (Artemia franciscana Kellogg, 1906) cysts occurs during fall and may impact Eared Grebe populations. We used photo surveys on the other hypersaline lake, Mono Lake, California, and on the GSL, as well as aerial counts on the GSL, to describe population fluctuations of Eared Grebes staging on these lakes. The long-term (1997–2012 ...


Effects Of Increasing Age On Fecundity Of Old-Aged Canada Geese (Branta Canadensis), Michael R. Conover May 2013

Effects Of Increasing Age On Fecundity Of Old-Aged Canada Geese (Branta Canadensis), Michael R. Conover

Wildland Resources Faculty Publications

Conover, M. R. 2013. Effects of increasing age on fecundity of old-aged Canada geese (Branta canadensis). Waterbirds 36: 378-384.


Ungulate Damage To Safflower In Utah, Michael J. Haney, Michael R. Conover Feb 2013

Ungulate Damage To Safflower In Utah, Michael J. Haney, Michael R. Conover

Wildland Resources Faculty Publications

In Utah, farmers are concerned that ungulates are damaging safflower (Carthamus tinctorius) fields. We examined elk (Cervus elaphus) and mule deer (Odocoileus hemionus) damage to safflower production in San Juan County, Utah during 2009 and 2010. We collected data on damaged safflower plants within 28 fields, totaling 1,581 ha (13 fields totaling 963 ha during 2009; 15 fields totaling 618 ha during 2010). We compared 3 methods to assess yield losses: ungulate-proof exclosures, adjacent plant compensation method, and counting the number of damaged plants in 50-m transects (safflower count method). Exclosures were of limited use because they could not ...