| geographic distribution of the muscle-dwelling nematode parelaphostrongylus odocoilei in north america, using molecular identification of first-stage larvae. | molecular identification of dorsal-spined larvae (dsl) from fecal samples indicates that the protostrongylid parasite parelaphostrongylus odocoilei occupies a broader geographic range in western north america than has been previously reported. we analyzed 2,124 fecal samples at 29 locations from thinhorn sheep (ovis dalli dalli and o. d. stonei), bighorn sheep (ovis canadensis canadensis and o. c. californiana), mountain goats (oreamnos americanus), woodland caribou (rangifer tarandus caribou), ... | 2005 | 16108550 |
| seasonal effects of pacific-based climate on recruitment in a predator-limited large herbivore. | 1. climate is an important factor influencing the population dynamics of large herbivores operating directly on individuals or through its effect on forage characteristics. however, the seasonal effect of climate may differ between forage- and predator-limited populations because of a climatic influence on predation rates. the influence of climate on predator-limited large herbivores is less well known than on forage-limited populations. further, the effect of pacific-based climate on large herb ... | 2010 | 20002863 |
| modern and ancient dna reveal recent partial replacement of caribou in the southwest yukon. | the long-term persistence of forest-dwelling caribou (rangifer tarandus caribou) will probably be determined by management and conservation decisions. understanding the evolutionary relationships between modern caribou herds, and how these relationships have changed through time will provide key information for the design of appropriate management strategies. to explore these relationships, we amplified microsatellite and mitochondrial markers from modern caribou from across the southern yukon, ... | 2010 | 20196813 |