scholarly journals Variation in age of primiparity in mountain goats estimated from horn growth increments

2021 ◽  
Author(s):  
Chad François Rice ◽  
Benjamin Larue ◽  
Marco Festa-Bianchet
Keyword(s):  
British Columbia ◽  
Wildlife Management ◽  
Mountain Range ◽  
Oreamnos Americanus ◽  
Mountain Ranges ◽  
Growth Increments ◽  
Horn Growth ◽  
Mountain Goats ◽  
Spatio Temporal ◽  
Coastal Mountain

Variation in age of primiparity is important for population dynamics and wildlife management because it can affect population growth. Using a novel technique based on the trade-off between annual horn growth and reproduction, we estimated the age of primiparity for 2274 female mountain goats (Oreamnos americanus, de Blainville 1816) harvested across British Columbia, Canada, from 1976 to 2019. We then investigated spatio-temporal variation in the probability that harvested females were primiparous when aged three, four or five years and older using Bayesian ordinal regressions. We found that the probability of primiparity at three years decreased over time in nearly all mountain ranges. In the Coastal Mountain range, however, the probability of primiparity at age three significantly increased. These results suggest that the large coastal populations of mountain goats could be more resilient to harvest than other populations in British Columbia, which may be experiencing environmental effects promoting later primiparity. Models predicting age of primiparity from annual growth measures are a valuable tool for wildlife management and could help conservation of many species.

Geophagic behavior in the mountain goat (Oreamnos americanus): support for meeting metabolic demands

2015 ◽  
Vol 93 (8) ◽  
pp. 599-604 ◽  
Author(s):  
B.L. Slabach ◽  
T.B. Corey ◽  
J.R. Aprille ◽  
P.T. Starks ◽  
B. Dane
Keyword(s):  
Logistic Regression ◽  
Mountain Range ◽  
High Fidelity ◽  
Field Observations ◽  
Nutrient Supplementation ◽  
Oreamnos Americanus ◽  
Mineral Supplementation ◽  
Mountain Goats ◽  
Mountain Goat ◽  
Coastal Mountain

Geophagy, the intentional consumption of earth or earth matter, occurs across taxa. Nutrient and mineral supplementation is most commonly cited to explain its adaptive benefits; yet many specific hypotheses exist. Previous research on mountain goats (Oreamnos americanus (Blainville, 1816)) broadly supports nutrient supplementation as the adaptive benefit of geophagy. Here, we use data from an undisturbed population of mountain goats inhabiting a geologically distinct coastal mountain range in southwestern British Columbia to test the hypothesis that geophagic behavior is a proximate mechanism for nutrient supplementation to meet metabolic demands. Our population, observed for over 30 consecutive years, returned each year with high fidelity to the same geophagic lick sites. Logistic regression demonstrated an overall effect of sodium and phosphorus, but not magnesium and calcium, on lick preferences. These data, in conjunction with field observations, provide support for the hypothesis that geophagy provides nutrient supplementation and that geophagy may be an obligate behavior to meet necessary metabolic demands within this population. The implications of our results suggest the necessity to preserve historically important habitats that may be necessary for population health.

scholarly journals Seasonal Habitat Use and Movements of Mountain Goats, Oreamnos americanus, in East-central British Columbia

2003 ◽  
Vol 117 (4) ◽  
pp. 565 ◽  
Author(s):  
Kim G. Poole ◽  
Douglas C. Heard
Keyword(s):  
British Columbia ◽  
Adverse Effects ◽  
Home Range ◽  
Habitat Use ◽  
High Elevation ◽  
East Central ◽  
Oreamnos Americanus ◽  
Mountain Goats ◽  
Mineral Licks ◽  
Forest Use

To identify the potential for adverse effects of forest development on Mountain Goats (Oreamnos americanus), we documented the patterns of forest use by goats and the factors influencing goat habitat use. We used a combination of 15 very high frequency (VHF) and six global positioning system (GPS) radiocollars to document the distribution and movements of 21 (15 female, 6 male) goats from 1997 to 1999 in the mountains surrounding the Robson Valley in east-central British Columbia. Because canopy closure reduces the likelihood that a GPS receiver will obtain a location fix, we estimated that GPS collars underrepresented forest use by about 23%. Three goats used separate winter and summer ranges separated by 8–13 km, while most simply exhibited seasonal shifts in elevation. In winter, goats were more often at lower elevations, in commercial forest stands, on southerly aspects, and moved less each hour and over the course of the winter. Goat use declined in areas >500 m from escape terrain and goats were found lower in elevation from evening to dawn compared to daylight hours. Collared goats used high elevation licks, which were either within their home range, or in two cases, 6 and 14 km from their typical home range. We documented use of known mid-elevation mineral licks by three collared goats, but no use of known low elevation (valley bottom and lower slopes) mineral licks. Robson Valley goats appeared to be at relatively low risk from disturbances related to logging, because although forest use was documented during winter, it occurred primarily on high elevation, steep slopes where trees are currently of low commercial value, and goats made little use of low elevation mineral licks. We recommend that in this area a forested buffer of 500 m around cliffs be left to reduce the possibility of adverse effects on goats especially, on southerly aspects above 1300 m.

Horn Growth in Mountain Goats (Oreamnos americanus)

1998 ◽  
Vol 79 (2) ◽  
pp. 406-414 ◽  
Author(s):  
S. D. Cote ◽  
M. Festa-Bianchet ◽  
K. G. Smith
Keyword(s):  
Oreamnos Americanus ◽  
Horn Growth ◽  
Mountain Goats

scholarly journals Status, Distribution, and Management of Mountain Goats in the Greater Yellowstone Ecosystem

1988 ◽  
Vol 12 ◽  
pp. 193-198
Author(s):  
John Laundre
Keyword(s):  
North America ◽  
National Parks ◽  
National Forests ◽  
Greater Yellowstone Ecosystem ◽  
Western North America ◽  
Oreamnos Americanus ◽  
Mountain Ranges ◽  
Mountain Goats ◽  
Greater Yellowstone

Mountain goats ( Oreamnos americanus) are indigenous to western North America but are not native to the Greater Yellowstone Ecosystem. Recent introductions of mountain goats at several sites in National Forests surrounding Yellowstone and Grand Teton National Parks have brought them to the area. The introductions have been successful and goat populations are increasing. Goats are now reported to be in most mountain ranges surrounding the Parks and occasional sightings are reported within the Parks.

The Vegetation of a Coastal Mountain Range

Ecology ◽  
1927 ◽  
Vol 8 (1) ◽  
pp. 27-44 ◽  
Author(s):  
Forrest Shreve
Keyword(s):  
Mountain Range ◽  
Coastal Mountain

III.—Glaciation of High Points in the Southern Interior of British Columbia

1889 ◽  
Vol 6 (8) ◽  
pp. 350-352 ◽  
Author(s):  
George M. Dawson
Keyword(s):  
British Columbia ◽  
Field Work ◽  
The South ◽  
Plateau Region ◽  
Mountain Ranges ◽  
South Eastern ◽  
Northerly Direction ◽  
Geological Magazine

In an article published in the Geological Magazine for August, 1888, an outline was presented of some facts resulting from recent investigations on the glaciation of British Columbia and adjacent regions, bearing more particularly on the flow of ice in a northerly direction brought to light by explorations in the Yukon district, but touching also on the south-eastern extension of the great western glacier-mass of the continent, which I have proposed to name the Cordilleran glacier. Field-work carried out by me during the summer of 1888 has resulted in the accumulation of many new facts relating to the southern part of the area, which was at one time covered by the Cordilleran glacier, from which it would appear that it may ultimately be possible not only to trace the various stages in the recession of the main front of the great confluent glacier beneath which the interior or plateau region of British Columbia was buried, but even to follow the later stages of its decline as it became broken up into numerous local glaciers confined to the valleys of the several mountain ranges which limit the plateau.

scholarly journals [Re]covering Jeddah’s Wadis – Building the City’s Resilience through Green Infrastructure

2018 ◽  
Vol 11 (4) ◽  
pp. 228
Author(s):  
Hanaa Motasim
Keyword(s):  
Green Infrastructure ◽  
Rain Water ◽  
Mountain Range ◽  
Water Drainage ◽  
Severe Damage ◽  
Mountain Ranges ◽  
Natural Flow ◽  
The Rich ◽  
The City ◽  
Green Corridors

Jeddah, Saudi Arabia’s largest coastal city, is positioned between two prominent natural features: the mountain range on its eastern side and the Red Sea on its west. The city faces many challenges central to which is storm water drainage. The natural drainage of the city through its pre-existing wadis, bringing down the rain water from the steep mountain ranges through the low inclining coastal plane and into the sea, has been interrupted in the last few decades by massive road infrastructural projects cutting through the city and interrupting the natural flow. The outcome of these interventions has been excessive flooding calamities, of which the ones in 2009 and 2011 were the most extreme, causing severe damage to infrastructure, property and lives.In light of climate change the intensity of flash floods is expected to increase, placing enormous stress on the city. To control the floods the city has pushed forward heavily engineered solutions, canalizing the rich network of wadis, almost 80 in number, into 4 major concrete channels that discharge the rain water accumulated in the mountains directly into the sea. This solution, which has been prohibitive in cost, has robbed the city of any potential of utilizing the precious supply of rain water. This paper explores the potential of recovering Jeddah’s wadis and creating green corridors across the city. As opposed to engineered solutions which address singular problematics, green infrastructures could provide numerous benefits to the city and the region as a whole.

Wintering strategies by mountain goats in interior mountains

2009 ◽  
Vol 87 (3) ◽  
pp. 273-283 ◽  
Author(s):  
Kim G. Poole ◽  
Kari Stuart-Smith ◽  
Irene E. Teske
Keyword(s):  
Home Range ◽  
High Elevation ◽  
Habitat Model ◽  
Winter Habitat ◽  
Oreamnos Americanus ◽  
Gps Collars ◽  
Juvenile Mortality ◽  
Winter Range ◽  
Mountain Goats ◽  
Selection For

As with many ungulates inhabiting areas with potentially deep snow, winter is an important season for mountain goats ( Oreamnos americanus (de Blainville, 1816)) and is characterized by restricted movements and high juvenile mortality. We examined winter habitat selection and wintering strategies by mountain goats in two adjacent areas of southeastern British Columbia characterized by deep, moist snow and by shallow, dry snow. Fifteen GPS collars were placed on mountain goats in each area over two winters. Winter-range size did not differ between areas and comprised, on average, 2.2%–7.4% of male home range and 8.0%–14.1% of female home range. Topographic variables dominated habitat model selection. At the broad scale, mountain goats in both areas selected winter ranges closer to escape terrain on warmer aspects that contained lesser amounts of mature dense forest. At the fine scale, mountain goats in both areas selected rugged habitat at upper mid-elevations and on warmer aspects. Alpine areas were avoided in the deep snow area and selected in the shallow snow area. No selection for mature forests was observed in either area. Mountain goats, therefore, appeared to utilize open, high-elevation habitats in shallow snow zones, but they did not seek reduced snow levels in mature forest stands in deep snow areas.

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