@conference {50152,
	title = {Comparing beef cow behavioral syndromes to measures of productivity and spatial use of rangelands},
	booktitle = {62nd Society for Range Management Annual Meeting},
	year = {2009},
	month = {02/2009},
	pages = {2030-10},
	publisher = {Society for Range Management},
	organization = {Society for Range Management},
	address = {Alb., NM},
	abstract = {<p>Individuals within animal groups exhibit consistent behavioral patterns within or across situations known as behavioral syndromes. Proactive (nervous) vs. reactive (calm) behavioral syndromes are observed in many animal species and influence how individuals cope with stress. We investigated the relationships between stress coping styles, spatial patterns of rangeland use, and performance of 36 young cows during two consecutive calving seasons (2006-07). Feeding rate in confinement was the criterion used to classify cows into stress copying style groups. Cows were tracked using GPS collars for approximately 45 days during calving; calves were tracked with GPS collars in 2007. Compared to proactive cows (PR), reactive individuals (RE) spent more time at water (means \&plusmn; SD; PR: 73 \&plusmn; 50 vs. RE: 172 \&plusmn; 40 min/d), used less area (PR: 21 \&plusmn; 3 vs. RE: 17 \&plusmn; 3 ha/d), and exhibited more concentrated movement patterns (PR: 264 \&plusmn; 44 vs. RE: 313 \&plusmn; 73 m traveled/ha explored). Reactive individuals had lighter body weights (PR: 434 \&plusmn; 33 vs. RE: 395 \&plusmn; 28 kg), longer postpartum anestrous periods (PR: 44 \&plusmn; 14 vs. RE: 68 \&plusmn; 18 d), and weaned lighter calves (PR: 207 \&plusmn; 37 vs. RE: 179 \&plusmn; 20 kg). Calves born to highly proactive cows (PR+) were lighter than those born to less proactive mothers (PR-). PR+ spent less time near their calves, traveled further from their offspring, and weaned lighter calves than PR-. Behavioral syndromes appeared to influence landscape use and beef cow productivity in this study. Cows with intermediate stress coping styles appeared to be the best suited to the biophysical characteristics of our study site.</p>
},
	keywords = {abstract, animal, behavioral, GPS, productivity, spatial use},
	author = {Wesley, R.L. and Andr{\'e}s F. Cibils and Pollak, E.R. and S.H. Cox and Mulliniks, T. and M.K. Petersen and E.L. Fredrickson}
}
@proceedings {50301,
	title = {Differences in rangeland use pattterns of young cows with different stress coping styles: Preliminary results},
	year = {2008},
	month = {July 18, 2008},
	pages = {23-26},
	address = {Corona, NM},
	abstract = {Individuals in most animal groups exhibit consistent behavioral differences within or across situations (feeding, mating, predator avoidance, etc.) known as behavioral syndromes (Sih et al. 2004). Proactive (more nervous) vs. reactive (calmer) behavioral syndromes have been observed in many animal species and have been shown to influence how individuals cope with stress (Koolhaas et al. 1999). We investigated the relationships between stress coping styles, patterns of rangeland use, and performance of thirty six 3-year-old cows during two consecutive calving seasons (2006-07). We found that calmer cows (classified as reactive) spent more time at water, explored smaller areas in any given day, had lower body weights, longer postpartum anestrous periods, and weaned lighter calves than cows classified as proactive (more nervous cows). Because our results are based on a limited number of animals which belong to a fairly docile herd, they should be considered preliminary. Further work investigating these relationships is underway.},
	keywords = {Corona, proceedings, stress},
	url = {/files/bibliography/08-028.pdf},
	author = {Wesley, R.L. and Andr{\'e}s F. Cibils and Pollak, E.R. and S.H. Cox and Mulliniks, J.T. and M.K. Petersen and E.L. Fredrickson}
}
@conference {50300,
	title = {Measures of daily distribution patterns of cow calf pairs using global positioning systems on both cows and calves},
	booktitle = {Society for Range Mangement},
	year = {2008},
	month = {January 26, 2008},
	pages = {2186},
	abstract = {GPS collars were used to describe the daily distribution patterns of cows and their calves from 18 to 60 days postpartum on pinyon juniper-shortgrass rangeland in central New Mexico. Eighteen, 3 year old cows and their calves were fitted weekly with GPS collars for seven consecutive weeks. Twenty days with cow calf pair location data for at least 48 consecutive hours were randomly selected. Daily area explored was estimated using the area of the 90\% volume contour predicted with Kernel Analysis in the animal movements extension of ArcVeiw GIS 3.3. Cows daily distance traveled ranged from 2.7 to 6.2 km and they explored between 4.5 and 28.5ha day-1. Calves traveled between 2.2 and 6.1 km day-1 while exploring areas ranging from 1.3 to 16.7ha, of which an average of 5.5 {\textpm} 2.9ha overlapped with the area explored by its mother. Neither daily distance traveled nor area explored by the cow were correlated with calf age, but calves tended to travel longer distances and explore larger areas with increasing age (r=0.37, P= 0.10 and r=0.38, P=0.10, respectively). Cows visited water 85\%, and calves 15\%, of the days sampled. Average distance from water was 0.8 {\textpm} 0.21 km for cows and calves and was positively correlated for both with calf age (r=0.53, P=0.02 and r =0.57, P=0.01 respectively), as was maximum distance traveled from water (r=0.36, P=0.11, and r=0.47, P=0.03, respectively). Cows spent between 4.4 and 15.1 hours total, but never more than 8.3 hours in one event, farther than 100m away from their calves in any 24 hour period. Maximum distance between a calf and its mother was positively correlated with age (r=.50, P=0.02). Search patterns of cows (ratio between daily distance traveled and daily area explored) became considerably more concentrated when they remained in the proximity of their calves.},
	keywords = {abstract, abstracts, GPS collars, pinyon juniper},
	author = {Wesley, R.L. and Andr{\'e}s F. Cibils and Pollak, E.R. and S.H. Cox and Mulliniks, T. and M.K. Petersen and E.L. Fredrickson}
}
