Academic literature on the topic 'Migratory linkages'

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Journal articles on the topic "Migratory linkages"

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Norwood, Chris. "Linkages in the Landscape: The Role of Corridors and Connectivity in wildlife Conservation." Pacific Conservation Biology 5, no. 2 (1999): 158. http://dx.doi.org/10.1071/pc990158.

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Increasing demand for resources through a growing world population and the development of consumer led economies has led to large-scale habitat modification. One of the most disturbing aspects of these changes is the loss of biodiversity. Conservation biology as a discipline seeks to counteract or minimize the loss of biodiversity. Management is an Important aspect in achieving this goal. One concept used in Wildlife management and conservation is that of landscape linkages. Linkages are aimed at faclhtatmg .the connectivity for species, communities or ecological processes. There are many types of linkages in the landscape; both natural and human induced. Covered in this book are linkages such as greenways, dispersal corridors, riparian remnants, wildlife corridors, stepping stones, hedgerows and road underpasses. Linkages range in scale from small patches of old-growth forest in a forest mosaic to migratory routes for birds across and between continents.
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Robinson, Robert A., Christoph M. Meier, Willem Witvliet, Marc Kéry, and Michael Schaub. "Survival varies seasonally in a migratory bird: Linkages between breeding and non‐breeding periods." Journal of Animal Ecology 89, no. 9 (2020): 2111–21. http://dx.doi.org/10.1111/1365-2656.13250.

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Latta, Steven C., Sonia Cabezas, Danilo A. Mejia, et al. "Carry-over effects provide linkages across the annual cycle of a Neotropical migratory bird, the Louisiana WaterthrushParkesia motacilla." Ibis 158, no. 2 (2016): 395–406. http://dx.doi.org/10.1111/ibi.12344.

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Bartlam-Brooks, H. L. A., M. C. Bonyongo, and Stephen Harris. "Will reconnecting ecosystems allow long-distance mammal migrations to resume? A case study of a zebra Equus burchelli migration in Botswana." Oryx 45, no. 2 (2011): 210–16. http://dx.doi.org/10.1017/s0030605310000414.

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AbstractTerrestrial wildlife migrations, once common, are now rare because of ecosystem fragmentation and uncontrolled hunting. Botswana historically contained migratory populations of many species but habitat fragmentation, especially by fences, has decreased the number and size of many of these populations. During a study investigating herbivore movement patterns in north-west Botswana we recorded a long-distance zebra Equus burchelli antiquorum migration between the Okavango Delta and Makgadikgadi grasslands, a round-trip distance of 588 km; 55% of 11 animals collared in the south-eastern peripheral delta made this journey. This was unexpected as, between 1968 and 2004, the migration could not have followed its present course because of the bisection of the route by a veterinary cordon fence. As little evidence exists to suggest that large-scale movements by medium-sized herbivores can be restored, it is of significant interest that this migration was established to the present highly directed route within 4 years of the fence being removed. The success of wildlife corridors, currently being advocated as the best way to re-establish ecosystem connectivity, relies on animals utilizing novel areas by moving between the connected areas. Our findings suggest that medium-sized herbivores may be able to re-establish migrations relatively quickly once physical barriers have been removed and that the success of future system linkages could be increased by utilizing past migratory routes.
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Patay, Tünde. "A Comparative Analysis of Migration Policies: (Best) Practices from Europe." Acta Universitatis Sapientiae, Economics and Business 5, no. 1 (2017): 139–54. http://dx.doi.org/10.1515/auseb-2017-0007.

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AbstractMigration is one of the main factors that shape and accelerate the development of nations or urban areas, although the dynamics and combined effects of migratory movements, national policies, and the roles of local authorities present a mixed picture in Europe. Some countries have restrictive immigration and integration policies, other nations provide easier access to their political and welfare systems, while the question of local responsibility has also acquired particular importance in recent years. The aim of this study is to explain the linkages between migration policy and development, exploring the variety of European integration policies and their effects on the national socio-economic structures. The integration policy has progressively been becoming ever more important over the last decades. The analysis presents how integration tools interact with national or regional development, emphasizing the role of different migration strategies.
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Beamish, R. J., G. A. McFarlane, and J. R. King. "Migratory patterns of pelagic fishes and possible linkages between open ocean and coastal ecosystems off the Pacific coast of North America." Deep Sea Research Part II: Topical Studies in Oceanography 52, no. 5-6 (2005): 739–55. http://dx.doi.org/10.1016/j.dsr2.2004.12.016.

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Moore, Jonathan W. "Bidirectional connectivity in rivers and implications for watershed stability and management." Canadian Journal of Fisheries and Aquatic Sciences 72, no. 5 (2015): 785–95. http://dx.doi.org/10.1139/cjfas-2014-0478.

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River networks are connected in both upstream and downstream directions on large spatial scales by movement of water, materials, and animals. Here I examine the implications of these linkages for the stability, productivity, and management of watersheds and their migratory fishes. I use simple simulations of watershed alteration to illustrate that degradation can erode the productivity and stability of both upstream and downstream fisheries. Through analysis of an existing global dataset on rivers, I found that larger rivers tend to be more fragmented than smaller rivers. I offer three challenges and opportunities for the future management of watersheds. First, given that human impacts can spread up and down rivers, there is a need to align the scales of impact assessments with the natural scale of river systems. Second, free-flowing rivers naturally dampen variability; thus, the conservation of connectivity, habitat, and biodiversity represents a key opportunity to sustain the processes that confer stability. Third, watersheds represent natural units of social–ecological systems; watershed governance would facilitate reciprocal feedbacks between people and ecosystems and enable more social–ecological resilience.
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Forbes, Bruce C., Timo Kumpula, Nina Meschtyb, et al. "Sea ice, rain-on-snow and tundra reindeer nomadism in Arctic Russia." Biology Letters 12, no. 11 (2016): 20160466. http://dx.doi.org/10.1098/rsbl.2016.0466.

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Sea ice loss is accelerating in the Barents and Kara Seas (BKS). Assessing potential linkages between sea ice retreat/thinning and the region's ancient and unique social–ecological systems is a pressing task. Tundra nomadism remains a vitally important livelihood for indigenous Nenets and their large reindeer herds. Warming summer air temperatures have been linked to more frequent and sustained summer high-pressure systems over West Siberia, Russia, but not to sea ice retreat. At the same time, autumn/winter rain-on-snow (ROS) events have become more frequent and intense. Here, we review evidence for autumn atmospheric warming and precipitation increases over Arctic coastal lands in proximity to BKS ice loss. Two major ROS events during November 2006 and 2013 led to massive winter reindeer mortality episodes on the Yamal Peninsula. Fieldwork with migratory herders has revealed that the ecological and socio-economic impacts from the catastrophic 2013 event will unfold for years to come. The suggested link between sea ice loss, more frequent and intense ROS events and high reindeer mortality has serious implications for the future of tundra Nenets nomadism.
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Sharma, Ridima, Sakshi Tanwar, and Safder Rizvi. "Growth of urbanization in Himachal Pra-desh : A statistical analysis." International Journal of Engineering & Technology 7, no. 1.4 (2018): 39. http://dx.doi.org/10.14419/ijet.v7i1.4.9200.

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Cities appear as a major role player in the economy of any area reflecting the global integration of its economy as they house majority of large business groups. Migratory population and urban growth are direct contributors in this economic expansion, particularly in the present-day phase of globalization which in under developed countries causes densification and instability of agriculture and other existing land use thus bringing in the need of a proper land resource management.Focused attention is needed to integrate infrastructure development in various cities and linkages should be established between the creation and management of assets through a system of reforms for long-term sustainability. Himachal Pradesh is a hill state with some most difficult terrains of the country making the preparation of complete cadastral record of land nearly impossible only 80% of land is under revenue records. Thus the amount of habitable land decreases further with around 50 % of the land under forest cover. The aim of the study is to analyze the growth of urbanisation in Himachal Pradesh along with the factors responsible. This growth pattern can later be used to formulate proper land use management and infrastructure development policies for equitable development of the area.
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Feyrer, Frederick, George Whitman, Matthew Young, and Rachel C. Johnson. "Strontium isotopes reveal ephemeral streams used for spawning and rearing by an imperilled potamodromous cyprinid Clear Lake hitch Lavinia exilicauda chi." Marine and Freshwater Research 70, no. 12 (2019): 1689. http://dx.doi.org/10.1071/mf18264.

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Identification of habitats responsible for the successful production and recruitment of rare migratory species is a challenge in conservation biology. Here, a tool was developed to assess life stage linkages for the threatened potamodromous cyprinid Clear Lake hitch Lavinia exilicauda chi. Clear Lake hitch undertake migrations from Clear Lake (Lake County, CA, USA) into ephemeral tributary streams for spawning. An aqueous isoscape of strontium isotopic ratios (87Sr/86Sr) was constructed for Clear Lake and its watershed to trace natal origins and migration histories of adult recruits. Aqueous 87Sr/86Sr differentiated Clear Lake from 8 of 10 key tributaries and clustered into 5 strontium isotope groups (SIGs) with 100% classification success. Otolith 87Sr/86Sr showed all five groups contributed variably to the population. The age at which juveniles migrated from natal streams to Clear Lake ranged from 11 to 152 days (mean±s.d., 43±34 days) and was positively associated with the permanency of natal habitat. This information can be used by resource managers to develop conservation actions for Clear Lake hitch. This study demonstrates the utility of strontium isotopes in otoliths as a tool to identify important freshwater habitats occupied over the lifespan of an individual that would otherwise be challenging or impossible to trace with other methods.A
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Dissertations / Theses on the topic "Migratory linkages"

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Ibarguen, Siri B. "Population connectivity combining methods for estimating avian dispersal and migratory linkages /." Columbus, Ohio : Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1079979416.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xvii, 143 p.; also includes graphics. Includes abstract and vita. Advisor: Thomas A. Waite, Dept. of Evolution, Ecology, and Organismal Biology. Includes bibliographical references (p. 135-143).
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Book chapters on the topic "Migratory linkages"

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Fink, Gerhard. "The Migratory Catalyst: α-Olefin Polymerization by 2,ω-Linkage." In Recent Advances in Mechanistic and Synthetic Aspects of Polymerization. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3989-9_40.

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Zanoni, Elizabeth. "Introduction." In Migrant Marketplaces. University of Illinois Press, 2018. http://dx.doi.org/10.5622/illinois/9780252041655.003.0001.

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The Introduction defines migrant marketplaces, the book’s theoretical framework, as urban spaces characterized by material and imagined transnational linkages between mobile people and goods. As one of the most mobile ethnic groups during the age of mass migration, Italians in the United States and Argentina illuminate the historical formation of migrant marketplaces. It situates the book within the fields of transnational and comparative migration history, gender and food history, and the history of globalization. The introduction contends that Italian-language commercial newspapers, including La Patria degli Italiani in Buenos Aires, Il Progresso Italo-Americano in New York and publications of Italian Chambers of Commerce in these two cities, make an examination of migrant marketplaces possible because they ground global migratory and commercial flows in specific cities.
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"Challenges for Diadromous Fishes in a Dynamic Global Environment." In Challenges for Diadromous Fishes in a Dynamic Global Environment, edited by Thomas P. Quinn, Katy Doctor, Neala Kendall, and Harry B. Rich. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874080.ch2.

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&lt;em&gt;Abstract&lt;/em&gt;.-All diadromous fishes share some common themes in their life histories that are linked to the two migratory transitions between freshwater and marine habitats that define this group. We explore these linkages using Pacific salmon and specifically the sockeye salmon &lt;em&gt;Oncorhynchus nerka &lt;/em&gt;populations from Bristol Bay, Alaska as a model system to illustrate concepts that are broadly applicable to diadromous fishes. In general, large size is beneficial for survival at sea or reproduction, but because the seasonal migration window is often narrow, the main option in many cases is to go in 1 year or delay until the next. The age at which fish make this transition is related to growth, but it reflects population-specific norms of reaction rather than species-wide rules. Common growing conditions have different effects on discrete populations that are shaped by the trade-offs between the benefits of large size in the new environment and the risks of mortality in the present environment associated with another year of growth. Within-season variation in timing is also related to body size (larger fish generally migrating earlier), reflecting a balance between the need to grow as large as possible before making the transition and the need to migrate at the optimal date. These complex life history connections are affected by natural variation in growing conditions driven by biotic and abiotic processes. In addition to the natural evolutionary and ecological processes affecting life history transitions, humans can also have profound effects. Fishing affects the abundance of prespawning adults, hence the levels of intraspecific competition and growth of their juvenile offspring in freshwater prior to seaward migration. In addition, fishing is often selective with respect to the body size and timing of migration, and the linkage between these traits further complicates the effects of selection.
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"Challenges for Diadromous Fishes in a Dynamic Global Environment." In Challenges for Diadromous Fishes in a Dynamic Global Environment, edited by Thomas P. Quinn. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874080.ch52.

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&lt;em&gt;Abstract&lt;/em&gt;.-In the two decades since the first symposium devoted to anadromous and catadromous fishes, the study of these fishes and their life history patterns has benefited from numerous advances in perspectives and techniques. Molecular ecology, fisheries oceanography, conservation biology, climate change, nutrient cycling, and landscape ecology are some of the many fields that have blossomed during this period, providing a wealth of insights for those studying migratory fishes. The purpose of this paper is to bridge the gap between the 1986 and 2007 symposia, noting some of the scientific advances, but also the fact that many populations of diadromous fishes have declined. These problems are reflected in the focus of the present symposium on conservation and socioeconomic aspects, as well as life history, diversity, and migration patterns. The enormity of the changes in the environment, both natural and anthropogenic, poses tremendous challenges for diadromous fishes and further emphasizes the need for linkage between research and conservation, using all the tools at the disposal of modern science and the development of new ones.
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Reports on the topic "Migratory linkages"

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Conway, Courtney J., Carol A. Finley, and Victoria Garcia. Migratory Linkages of Burrowing Owls on DoD Installations and Adjacent Lands. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada547169.

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