Seasonal Movements, Winter Range Use, and Migratory Connectivity of the Black Oystercatcher

The Condor ◽  
2010 ◽  
Vol 112 (4) ◽  
pp. 731-743 ◽  
Author(s):  
Matthew Johnson ◽  
Peter Clarkson ◽  
Michael I. Goldstein ◽  
Susan M. Haig ◽  
Richard B. Lanctot ◽  
...  
Keyword(s):  
Migratory Connectivity ◽  
Seasonal Movements ◽  
Range Use ◽  
Winter Range

Integrating tracking and resight data enables unbiased inferences about migratory connectivity and winter range survival from archival tags

The Condor ◽  
2021 ◽  
Author(s):  
Clark S Rushing ◽  
Aimee M Van Tatenhove ◽  
Andrew Sharp ◽  
Viviana Ruiz-Gutierrez ◽  
Mary C Freeman ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Eastern United States ◽  
Migratory Connectivity ◽  
Migratory Species ◽  
Pet Trade ◽  
Winter Range ◽  
Archival Tags ◽  
Breeding Grounds ◽  
Unbiased Estimates ◽  
Further Development

Abstract Archival geolocators have transformed the study of small, migratory organisms but analysis of data from these devices requires bias correction because tags are only recovered from individuals that survive and are re-captured at their tagging location. We show that integrating geolocator recovery data and mark–resight data enables unbiased estimates of both migratory connectivity between breeding and nonbreeding populations and region-specific survival probabilities for wintering locations. Using simulations, we first demonstrate that an integrated Bayesian model returns unbiased estimates of transition probabilities between seasonal ranges. We also used simulations to determine how different sampling designs influence the estimability of transition probabilities. We then parameterized the model with tracking data and mark–resight data from declining Painted Bunting (Passerina ciris) populations breeding in the eastern United States, hypothesized to be threatened by the illegal pet trade in parts of their Caribbean, nonbreeding range. Consistent with this hypothesis, we found that male buntings wintering in Cuba were 20% less likely to return to the breeding grounds than birds wintering elsewhere in their range. Improving inferences from archival tags through proper data collection and further development of integrated models will advance our understanding of the full annual cycle ecology of migratory species.

Veery (Catharus fuscescens) Wintering Locations, Migratory Connectivity, and a Revision of its Winter Range Using Geolocator Technology

The Auk ◽  
2011 ◽  
Vol 128 (3) ◽  
pp. 531-542 ◽  
Author(s):  
Christopher M. Heckscher ◽  
Syrena M. Taylor ◽  
James W. Fox ◽  
Vsevolod Afanasyev
Keyword(s):  
Migratory Connectivity ◽  
Winter Range ◽  
Catharus Fuscescens

scholarly journals The distribution and movement patterns of four woodland caribou herds in Quebec and Labrador

Rangifer ◽  
1986 ◽  
Vol 6 (2) ◽  
pp. 43 ◽  
Author(s):  
W. K. Brown ◽  
J. Huot ◽  
P. Lamothe ◽  
S. Luttich ◽  
M. Paré ◽  
...  
Keyword(s):  
Rangifer Tarandus ◽  
Radio Telemetry ◽  
Late Winter ◽  
Rangifer Tarandus Caribou ◽  
Woodland Caribou ◽  
Seasonal Movements ◽  
Wetland Habitat ◽  
Winter Range ◽  
Aerial Surveys ◽  
Continuous Range

<p>Recent studies of woodland caribou (Rangifer tarandus caribou) in northern Quebec and central Labrador have demonstrated similar patterns of seasonal movements and distribution among four herds. Aerial surveys and radio-telemetry indicated that animals occupied forest-wetland habitat at densities of 0.03 caribou km2, or lower, for most of the year. Although females were widely dispersed at calving individuals demonstrated fidelity toward specific calving locations, in successive years. Caribou did not form large post-calving aggregations. Movement was greatest in the spring, prior to calving, and in the fall, during or immediately after rutting. Caribou were generally sedentary during summer and winter, although some moved relatively long distances to late-winter range. Although the herds occupy continuous range across Quebec and Labrador, our data indicate that the herds are largely discreete and should be managed individually.</p>

scholarly journals Success and failure of reindeer herding in Greenland

Rangifer ◽  
1999 ◽  
Vol 19 (4) ◽  
pp. 81 ◽  
Author(s):  
Christine Cuyler
Keyword(s):  
Animal Husbandry ◽  
The Other ◽  
Reindeer Herding ◽  
Reindeer Husbandry ◽  
West Greenland ◽  
Range Use ◽  
Winter Range ◽  
Recent Innovation ◽  
And Control ◽  
Year 2000

Animal husbandry is a recent innovation in Greenland, specifically reindeer husbandry is less than 50 years old. Reindeer husbandry was first established in mid-west Greenland and later in southern Greenland. The Greenland hunter tradition and culture is, however, still dominant in many communities. During the 1980s and 1990s, the incompatibility of these two traditions resulted in the failure of reindeer husbandry in mid-west Greenland. There were neither herding nor seasonal herd movements. Animals remained year round on the winter range, which was destroyed as lichens were trampled every summer. Without seasonal herd movements both sustainable range use and control of the herd were lost. Today, there are just two semi-domestic reindeer herds left, and both are in southern Greenland. One herd is commercially successful, and the other is under development. In mid-west Greenland, semi-domestic reindeer husbandry officially ended in 1998, and a hunt was initiated to remove the remaining population. Possibly, by the year 2000 any animals left in this region will be considered wild caribou.

scholarly journals Integrating tracking and resight data from breeding Painted Bunting populations enables unbiased inferences about migratory connectivity and winter range survival

2020 ◽  
Author(s):  
Clark S. Rushing ◽  
Aimee M. Van Tatenhove ◽  
Andrew Sharp ◽  
Viviana Ruiz-Gutierrez ◽  
Mary C. Freeman ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Eastern United States ◽  
Migratory Connectivity ◽  
Winter Range ◽  
Breeding Populations ◽  
Archival Tags ◽  
Painted Bunting ◽  
Breeding Grounds ◽  
Unbiased Estimates ◽  
Further Development

AbstractArchival geolocators have transformed the study of small, migratory organisms but analysis of data from these devices requires bias correction because tags are only recovered from individuals that survive and are re-captured at their tagging location. We show that integrating geolocator recovery data and mark-resight data enables unbiased estimates of both migratory connectivity between breeding and non-breeding populations and region-specific survival probabilities for wintering locations. Using simulations, we first demonstrate that an integrated Bayesian model returns unbiased estimates of transition probabilities between seasonal ranges and to determine how different sampling designs influence estimability of transition probabilities. We then parameterize the model with tracking data and mark-resight data from declining Painted Bunting (Passerina ciris) populations breeding in the eastern United States, hypothesized to be threatened by the illegal pet trade in parts of their Caribbean, non-breeding range. Consistent with this hypothesis, we found that male buntings wintering in Cuba were 20% less likely to return to the breeding grounds than birds wintering elsewhere in their range. Improving inferences from archival tags through proper data collection and further development of integrated models will advance our understanding of full annual cycle ecology of migratory species.

scholarly journals Winter range drift in the George River Caribou Herd: a response to summer forage limitation?

Rangifer ◽  
2003 ◽  
Vol 23 (5) ◽  
pp. 113 ◽  
Author(s):  
Isabelle Schmelzer ◽  
Robert Otto
Keyword(s):  
Spatial Scales ◽  
Population Level ◽  
Migration Patterns ◽  
Range Use ◽  
Winter Range ◽  
Calf Survival ◽  
Winter Foraging ◽  
Summer Range ◽  
Wintering Areas ◽  
George River

Space use by the George River caribou herd (GRCH) changes in correspondence with migration patterns. The traditional range of this herd encompasses an area of approximately 900 000 km2. Range use is seasonal and includes travel to traditional calving grounds. Winter range use however, is more variable. The GRCH has grown rapidly from 5000 animals in 1954 to approximately 775 000 in 1993. Beginning in the mid 1980s, the calving and summer range habitats of the GRCH have deteriorated, resulting in a decline in physical condition and subsequent poor calf survival and low pregnancy rates. We assessed the importance of the winter range as a food source compensating for poor summer range quality through an evaluation of winter range drift and use intensity. We hypothesized that if winter ranges provide a compensatory source of forage, then George River caribou should avoid sites heavily used during the previous winter at a population level. Winter ranges for the GRCH were calculated using 4300 caribou locations obtained 1986-2000. We found that in spite of a doubling in net range area, the size of annual winter ranges did not increase, indicating the occurrence of range drift. Further, George River caribou exhibited avoidance of wintering areas at several spatial scales. Avoidance occurred across a use threshold, where the degree of use (or density) during the previous winter determined the level of avoidance during the subsequent winter. As the spatial scale decreased, the degree of avoidance increased. Caribou significantly avoided areas used the previous winter at spatial scales below and including 245 km2 (corresponding to a 75% use distribution). Results suggest winter foraging allows caribou suspend the effects of density-dependent summer forage limitation on herd productivity. As such, analysis of GRCH population trends should be considered in light of both summer and winter range resources.

Using Song Dialects to Assess the Migration Strategy of the Golden-crowned Sparrow

Western Birds ◽  
2021 ◽  
Vol 52 (4) ◽  
pp. 311-321
Author(s):  
Edward R. Pandolfino ◽  
Lily A. Douglas
Keyword(s):  
Small Sample Size ◽  
Small Sample ◽  
Published Data ◽  
Song Type ◽  
Migratory Connectivity ◽  
Migration Strategy ◽  
Chain Migration ◽  
Breeding Range ◽  
Winter Range ◽  
Song Dialects

Most techniques used to study migration of wild birds require capture for banding or for attachment and/or recovery of tags or transmitters. We took advantage of the fact that the Golden-crowned Sparrow (Zonotrichia atricapilla) sings in winter, combined with published data on the distribution of its distinct song dialects in the breeding range, to assess its migration strategy and migratory connectivity by means of these dialects. Using recordings of the Golden-crowned Sparrow’s song across much of its winter range, we categorized these birds by song type to identify their likely origin in some subset of the breeding range. This method allows examination of migration without the need to capture birds. Our results fit best with a pattern of chain migration, with the northernmost breeders wintering in the northernmost part of the winter range, and the southerly breeders wintering farther south. The results suggest strong migratory connectivity between segments of the breeding and winter ranges, though our small sample size makes it difficult to draw firm conclusions on connectivity.

scholarly journals Seasonal movements of White-tailed Deer (Odocoileus virginianus) in the Rocky Mountains of British Columbia

2020 ◽  
Vol 133 (3) ◽  
pp. 246-252
Author(s):  
Trevor A. Kinley
Keyword(s):  
British Columbia ◽  
Odocoileus Virginianus ◽  
National Parks ◽  
Rocky Mountains ◽  
High Elevation ◽  
Private Land ◽  
Very High Frequency ◽  
Seasonal Movements ◽  
Winter Range ◽  
Spatial Locations

Nineteen adult female White-tailed Deer (Odocoileus virginianus), fitted with very high frequency or global positioning system collars in the Rocky Mountains of southeast British Columbia, exhibited straight-line seasonal movements ranging from <4 km to 109 km. Movement was almost entirely along the floor of both low- and high-elevation valleys, although there was some use of mid-elevation mountainsides during early winter. Spatial locations of deer spanned 891–2234 m above sea level. Seasonal movements of these deer from a single winter range extended to two provinces, three national parks, one provincial park, non-park provincial Crown land, and private land. Deer populations with similar movement patterns may be most effectively managed by considering their extensive movements and coordinating approaches across jurisdictions.

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