Social integration and acclimation of translocated bighorn sheep (Ovis canadensis)

Poirier, Marc-Antoine; Festa-Bianchet, Marco

doi:10.1016/j.biocon.2017.11.031

Cited by 36 publications

(36 citation statements)

References 68 publications

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“…In addition, for highly gregarious species, individuals with high centrality may have higher fitness (Stanton & Mann, 2012; Vander Wal et al, 2015) and for species of conservation concern, the use of social network analysis could improve management of groups or populations. Moreover, social network analysis may be a useful tool to monitor groups of translocated individuals to ensure individuals maintain social structure or are able to integrate with new group members (e.g., Poirier & Festa-Bianchet, 2018). Indeed, social network analysis has potential to inform conservation practices.…”

Section: Discussionmentioning

confidence: 99%

Trends and perspectives on the use of social network analysis in behavioural ecology: a bibliometric approach

Webber

Wal

2018

Preprint

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9The increased popularity and improved accessibility of social network analysis has improved our 1 0 ability to test hypotheses about the complexity of animal social structure. To gain a deeper 1 1 understanding of the use and application of social network analysis, we systematically surveyed 1 2 the literature and extracted information on publication trends from articles using social network 1 3 analysis. We synthesize trends in social network research over time and highlight variation in the 1 4 use of different aspects of social network analysis. Our primary finding highlights the increase in 1 5 use of social network analysis over time and from this finding, we observed an increase in the 1 6 number of review and methods of social network analysis. We also found that most studies 1 7included a relatively small number (median = 15, range = 4-1406) of individuals to generate 1 8 social networks, while the number and type of social network metrics calculated in a given study 1 9varied zero to nine (median = 2, range 0-9). The type of data collection or the software programs 2 0 used to analyze social network data have changed; SOCPROG and UCINET have been replaced 2 1 by various R packages over time. Finally, we found strong taxonomic and conservation bias in 2 2

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Section: Discussionmentioning

confidence: 99%

Trends and perspectives on the use of social network analysis in behavioural ecology: a bibliometric approach

Webber

Wal

2018

Preprint

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“…Between 1972 and 1981, density was limited by annual removals of 12%–24% of adult females (Jorgenson, Festa‐Bianchet, & Wishart, ). Because the population was very small after 2000 and showed evidence of inbreeding (Rioux‐Paquette, Festa‐Bianchet, & Coltman, ), several individuals from another population were introduced in 2005, 2007 and 2015 to attempt a genetic rescue (Poirier & Festa‐Bianchet, ). Predation on adult was rare except from 1997 to 2001 and from 2011 to 2013.…”

Section: Methodsmentioning

confidence: 99%

Trophy hunting mediates sex‐specific associations between early‐life environmental conditions and adult mortality in bighorn sheep

Douhard

Festa‐Bianchet

Landes

et al. 2019

Journal of Animal Ecology

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Environmental conditions during early development, from conception to sexual maturity, can have lasting consequences on fitness components. Although adult life span often accounts for much of the variation in fitness in long‐lived animals, we know little about how early environment affects adult life span in the wild, and even less about whether these effects differ between the sexes. Using data collected over 45 years from wild bighorn sheep (Ovis canadensis), we investigated the effects of early environment on adult mortality in both sexes, distinguishing between natural and anthropogenic sources of mortality. We used the average body mass of yearlings (at about 15 months of age) as a yearly index of environmental quality. We first examined sex differences in natural mortality responses to early environment by censoring harvested males in the year they were shot. We then investigated sex differences in the effects of early environment on overall mortality (natural and hunting mortality combined). Finally, we used path analysis to separate the direct influence of early environment from indirect influences, mediated by age at first reproduction, adult mass and horn length. As early environmental conditions improved, natural adult mortality decreased in both sexes, although for males the effect was not statistically supported. Sex differences in the effects of early environment on adult mortality were detected only when natural and hunting mortality were pooled. Males that experienced favourable early environment had longer horns as adults and died earlier because of trophy hunting, which does not mimic natural mortality. Females that experienced favourable early environment started to reproduce earlier and early primiparity was associated with reduced mortality, suggesting a silver‐spoon effect. Our results show that early conditions affect males and females differently because of trophy hunting. These findings highlight the importance of considering natural and anthropogenic environmental factors across different life stages to understand sex differences in mortality.

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“…Ungulates are among the most imperiled wildlife worldwide, largely because of overexploitation and habitat loss (Hoffmann et al 2015;Ripple et al 2015Ripple et al , 2017Lindsey et al 2017). Beyond eliminating harvest, common management tactics to bolster small declining ungulate populations include habitat improvement (Risenhoover et al 1988, Dolan 2006, Wilson et al 2006), translocations to augment low numbers (Compton et al 1995, Singer et al 2000, Rominger et al 2004, DeCesare et al 2010, Poirier and Festa-Bianchet 2018, and predator reductions (Orians et al 1997;Hervieux et al 2014;Serrouya et al 2017bSerrouya et al , 2019Rominger 2018). In the last 2 decades, caribou (Rangifer tarandus) populations across the southern extent of their range that are exhibiting persistent declines have become the focus of intensive conservation efforts (Alberta Woodland Caribou Recovery Team 2005; British Columbia Ministry of Environment [BCME] 2009;Festa-Bianchet et al 2011;Environment Canada 2012Ray et al 2015) employing all these approaches with limited success (Hervieux et al 2014, Pyper et al 2014, Dickie et al 2017a, Leech et al 2017, Serrouya et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Maternal Penning to Improve Calf Survival in the Chisana Caribou Herd

Adams

Farnell

Oakley

et al. 2019

Wildlife Monographs

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Predation is a major limiting factor for most small sedentary caribou (Rangifer tarandus) populations, particularly those that are threatened or endangered across the southern extent of the species' range. Thus, reducing predation impacts is often a management goal for improving the status of small caribou populations, and lethal predator removal is the primary approach that has been applied. Given that predator control programs are often contentious, other management options that can garner broader public acceptance need to be considered.Substantial calf losses to predation in the few weeks following birth are common for these small caribou populations. Therefore, we employed a novel experimental approach of maternal penning with the goal of reducing early calf mortality in the Chisana Caribou Herd, a declining population in southwest Yukon and adjacent Alaska thought to number around 300 individuals. Maternal penning entailed temporarily holding pregnant females on their native range in a large pen secure from predators from late March through the initial weeks of calf rearing to mid-June. During 2003-2006, we conducted 4 annual penning trials with 17-50 pregnant females each year (n = 146 total), assessed survival of calves born in the pens, and evaluated survival and nutritional effects of penning for females that were held. We also investigated the herd's population dynamics during 2003-2008 to determine effects of maternal penning on calf recruitment and population growth. In addition to information gained during maternal penning, we determined natality and survival patterns via radiotelemetry, conducted autumn age-sex composition surveys each year, and censused the population in mid- October 2003October , 2005October , and 2007. Based on our penning trials and demographic investigations, we used simulation models to evaluate the effects of maternal penning relative to a population's inherent growth rate (finite rate of increase [λ] without maternal penning) and penning effort (proportion of calves born in penning) to provide perspective on utility of this approach for improving the status of small imperiled caribou populations.Pregnant females held in maternal penning tolerated captivity well in that they exhibited positive nutritional responses to ad libitum feed we provided and higher survival than free-ranging females (0.993 and 0.951 for penned and free-ranging females, respectively). Survival of pen calves from birth to mid-June was substantially higher than that of free-ranging calves (x = 0.950 and 0.376, respectively). This initial period accounted for 76% of the annual calf mortality in the free-ranging population. Pen-born calves maintained their survival advantage over wild-born calves to the end of their first year (x = 0.575 and 0.192, respectively) during years penning occurred.Females in the Chisana Herd were highly productive with 57% producing their first offspring at 2 years of age, and annual natality rates averaging 0.842 calves/female ≥2 years old. Age-specific natality rates exceed...

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Social integration and acclimation of translocated bighorn sheep (Ovis canadensis)

Cited by 36 publications

References 68 publications

Trends and perspectives on the use of social network analysis in behavioural ecology: a bibliometric approach

Trends and perspectives on the use of social network analysis in behavioural ecology: a bibliometric approach

Trophy hunting mediates sex‐specific associations between early‐life environmental conditions and adult mortality in bighorn sheep

Evaluation of Maternal Penning to Improve Calf Survival in the Chisana Caribou Herd

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