Caribou of the Central Arctic Region of Alaska in relation to adjacent caribou herds

Carruthers, D. R.; Jakimchuk, R. D.

doi:10.7557/2.6.2.584

Cited by 4 publications

(6 citation statements)

References 4 publications

(9 reference statements)

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“…Caribou moved south to the headwaters of the Atigun River but returned to the foothills and moved west in October of each year of this study. In 1984and 1985, Carruthers and Jakimchuk (1986 reported similar numbers of Caribou in the study area in February as in November, suggesting that migration out of the study area during winter did not occur.…”

Section: Discussionmentioning

confidence: 79%

Distribution and movements of Caribou, Rangifer tarandus, in the Central Arctic region of Alaska

Carruthers,

Ferguson,

Sopuck

1997

The Canadian Field-Naturalist

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The annual distribution patterns of Barren-ground Caribou ( Rangifer tarandus granti) in the Central Arctic region of Alaska were consistent over a three-year period. Caribou wintered in the northern foothills of the Brooks Range, and in spring at least one-half of the animals migrated west out of the study area and the remainder drifted north towards the coast. By mid-May, cows had reached calving areas along the coastal plain between the three major rivers in the study area (Colville, Sagavanirtok and Canning). Caribou dispersed over the coastal plain in June but by July they were highly aggregated near the coast and river deltas. From August to October, Caribou dispersion increased southwards until October when 82 percent of the study area was occupied. Influxes of Western Arctic herd and possibly Porcupine Caribou herd animals occurred in the fall when at least twice as many Caribou were in the study area as in June. Continued growth of the Western Arctic and Porcupine herds will likely result in increasing numbers of Caribou using the Central Arctic region. Changes in distribution and movements are likely to occur as numbers increase or decrease. These changes must be considered when evaluating the effects of oil development activities on Caribou in the region.

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Section: Discussionmentioning

confidence: 79%

Distribution and movements of Caribou, Rangifer tarandus, in the Central Arctic region of Alaska

Carruthers,

Ferguson,

Sopuck

1997

The Canadian Field-Naturalist

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“…In the case of caribou, SAMMs could be used to identify where the effects of future development and resource extraction will have the greatest impact on caribou survival and productivity, and where mitigation measures would be most effective (Carruthers & Jakimchuk, 1987).…”

Section: Towards a Better Understanding Of Animal Migrationmentioning

confidence: 99%

“…They allow researchers to identify the key threatening processes that affect the migrations of different species and the points in migratory journeys where populations are critically limited, including the impacts of carry-over effects between different stages of their journeys. For example, they could be used to understand the impacts of resource extraction and associated features on migratory journeys, such as the Trans-Alaska Pipeline (TAP) on migratory Barren-ground caribou (Rangifer tarandus groenlandicus) (Carruthers & Jakimchuk, 1987). SAMMs also allow researchers to predict how migratory behaviours may adapt to changing environmental conditions, and to anticipate the emergence of new routes and strategies.…”

Section: Towards a Better Understanding Of Animal Migrationmentioning

confidence: 99%

Explaining and predicting animal migration under global change

Howard,

Mason,

Baillie

et al. 2023

Diversity and Distributions

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Many migratory species are declining due to global environmental change. Yet, their complex annual cycles make unravelling the impacts of potential drivers such as climate and land‐use change on migrations a major challenge. Identifying where, when and how threatening processes impact species' migratory journeys and population dynamics is crucial for identifying effective conservation actions. Here, we describe how a new migration modelling framework – Spatially explicit Adaptive Migration Models (SAMMs) – can simulate the optimal behavioural decisions required to migrate across open land‐ or seascapes varying in character over space and time, without requiring predefined behavioural rules. Models of adaptive behaviour have been used widely in theoretical ecology but have great untapped potential in real‐world contexts. Applying adaptive behaviour models across open environments will allow users to explore how migratory species may adapt their routes and usage of intermediate sites in response to environmental change. We outline how SAMMs can be used to model migratory journeys through aerial, terrestrial and aquatic environments, demonstrating their potential using a case study on the common cuckoo (Cuculus canorus) and comparing modelled to observed behaviours. SAMMs offer a tool to identify the key threats faced by migratory species, how they could adapt to future migratory journeys in response to changing environmental conditions and the consequences of not being able to adapt to change.

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“…The females of each population retain fidelity to particular calving sites (Dau and Cameron, 1986;Gunn and Miller, 1986) In addition, it has been established that populations are characterized by fidelity to particular summer ranges (Cameron et al, 1986). When several populations use the same wintering grounds they migrate in spring, each in its own direction (Azarov, 1976;Carruthers and Jakimchuk, 1986). Presumably, populations use traditional migration routes.…”

Section: Spatial Dynamicsmentioning

confidence: 99%

Population dynamics of reindeer

Baskin

1990

Ran

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Five types of reindeer populations are distinguished in terms of population dynamics, population density, social structure and migration distance. Differences in the biological rhythms of the populations result in calving occuring 20 days before snow melting in all populations as well as maximal utilization by the deer of young green vegetation in summer. The growth of antlers may serve as a regulatior of biological rhytms. Populations differ in the level of social motivation. Formation of groups of not less than 30-35 animals ensures cooperative protection from insects and management of the group by man. The fidelity to the calving sites, summer ranges and constant migration routes is based on the common orientation reactions of the animals and social attraction. The direction and migration routes are detemined by obligate learning. The dynamics of populations depends on the fertility of 2 and 3 year old females which is determined by feeding conditions in summer and the activity of males during the rut. Migration plays an important role in the population dynamics

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Caribou of the Central Arctic Region of Alaska in relation to adjacent caribou herds

Cited by 4 publications

References 4 publications

Distribution and movements of Caribou, Rangifer tarandus, in the Central Arctic region of Alaska

Distribution and movements of Caribou, Rangifer tarandus, in the Central Arctic region of Alaska

Explaining and predicting animal migration under global change

Population dynamics of reindeer

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