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Journal articles on the topic 'Migratory species'
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1
Turner, Marian. "Protection for migratory species." Nature Ecology & Evolution 7, no. 1 (2023): 7. http://dx.doi.org/10.1038/s41559-022-01966-x.
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Horns, Joshua J., and Çağan H. Şekercioğlu. "Conservation of migratory species." Current Biology 28, no. 17 (2018): R980—R983. http://dx.doi.org/10.1016/j.cub.2018.06.032.
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Gross, Michael. "Migratory species in danger." Current Biology 34, no. 6 (2024): R217—R219. http://dx.doi.org/10.1016/j.cub.2024.03.004.
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Rolland, Jonathan, Frédéric Jiguet, Knud Andreas Jønsson, Fabien L. Condamine, and Hélène Morlon. "Settling down of seasonal migrants promotes bird diversification." Proceedings of the Royal Society B: Biological Sciences 281, no. 1784 (2014): 20140473. http://dx.doi.org/10.1098/rspb.2014.0473.
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How seasonal migration originated and impacted diversification in birds remains largely unknown. Although migratory behaviour is likely to affect bird diversification, previous studies have not detected any effect. Here, we infer ancestral migratory behaviour and the effect of seasonal migration on speciation and extinction dynamics using a complete bird tree of life. Our analyses infer that sedentary behaviour is ancestral, and that migratory behaviour evolved independently multiple times during the evolutionary history of birds. Speciation of a sedentary species into two sedentary daughter species is more frequent than speciation of a migratory species into two migratory daughter species. However, migratory species often diversify by generating a sedentary daughter species in addition to the ancestral migratory one. This leads to an overall higher migratory speciation rate. Migratory species also experience lower extinction rates. Hence, although migratory species represent a minority (18.5%) of all extant birds, they have a higher net diversification rate than sedentary species. These results suggest that the evolution of seasonal migration in birds has facilitated diversification through the divergence of migratory subpopulations that become sedentary, and illustrate asymmetrical diversification as a mechanism by which diversification rates are decoupled from species richness.
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Aqorau, Transform, Johann Bell, and John N. Kittinger. "Good governance for migratory species." Science 361, no. 6408 (2018): 1208.2–1209. http://dx.doi.org/10.1126/science.aav2051.
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Reynolds, Mark D., Brian L. Sullivan, Eric Hallstein, et al. "Dynamic conservation for migratory species." Science Advances 3, no. 8 (2017): e1700707. http://dx.doi.org/10.1126/sciadv.1700707.
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Martin, Tara G., Iadine Chadès, Peter Arcese, Peter P. Marra, Hugh P. Possingham, and D. Ryan Norris. "Optimal Conservation of Migratory Species." PLoS ONE 2, no. 8 (2007): e751. http://dx.doi.org/10.1371/journal.pone.0000751.
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Outlaw, Diana C., and V. Nijman. "Morphological evolution of some migratory Ficedula flycatchers." Contributions to Zoology 80, no. 4 (2011): 279–84. http://dx.doi.org/10.1163/18759866-08004005.
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Long-distance migration imposes physiological and morphological selection pressures on birds. The genus Ficedula, a lineage of Old World flycatchers, consists of long- and short-distance migratory species, as well as sedentary species. Members of each of these groups are not reciprocally monophyletic, yet each of the behavioral groups is morphologically distinguishable even when accounting for phylogeny. Long-distance migratory species have more pointed wings than either short-distance migratory or sedentary species, and migratory behaviors and wing pointed-ness are phylogenetically correlated. This suggests that migratory Ficedula species have converged on a migratory phenotype, and that migration may be a selective agent that has shaped the independently-derived migratory Ficedula species in similar ways.
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Burns, Michael D., and Devin D. Bloom. "Migratory lineages rapidly evolve larger body sizes than non-migratory relatives in ray-finned fishes." Proceedings of the Royal Society B: Biological Sciences 287, no. 1918 (2020): 20192615. http://dx.doi.org/10.1098/rspb.2019.2615.
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Migratory animals respond to environmental heterogeneity by predictably moving long distances in their lifetime. Migration has evolved repeatedly in animals, and many adaptations are found across the tree of life that increase migration efficiency. Life-history theory predicts that migratory species should evolve a larger body size than non-migratory species, and some empirical studies have shown this pattern. A recent study analysed the evolution of body size between diadromous and non-diadromous shads, herrings, anchovies and allies, finding that species evolved larger body sizes when adapting to a diadromous lifestyle. It remains unknown whether different fish clades adapt to migration similarly. We used an adaptive landscape framework to explore body size evolution for over 4500 migratory and non-migratory species of ray-finned fishes. By fitting models of macroevolution, we show that migratory species are evolving towards a body size that is larger than non-migratory species. Furthermore, we find that migratory lineages evolve towards their optimal body size more rapidly than non-migratory lineages, indicating body size is a key adaption for migratory fishes. Our results show, for the first time, that the largest vertebrate radiation on the planet exhibited strong evolutionary determinism when adapting to a migratory lifestyle.
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Somenzari, Marina, Priscilla Prudente do Amaral, Victor R. Cueto, et al. "An overview of migratory birds in Brazil." Papéis Avulsos de Zoologia 58 (February 20, 2018): 3. http://dx.doi.org/10.11606/1807-0205/2018.58.03.
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We reviewed the occurrences and distributional patterns of migratory species of birds in Brazil. A species was classified as migratory when at least part of its population performs cyclical, seasonal movements with high fidelity to its breeding grounds. Of the 1,919 species of birds recorded in Brazil, 198 (10.3%) are migratory. Of these, 127 (64%) were classified as Migratory and 71 (36%) as Partially Migratory. A few species (83; 4.3%) were classified as Vagrant and eight (0,4%) species could not be defined due to limited information available, or due to conflicting data.
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Howard, Christine, Philip A. Stephens, Joseph A. Tobias, Catherine Sheard, Stuart H. M. Butchart, and Stephen G. Willis. "Flight range, fuel load and the impact of climate change on the journeys of migrant birds." Proceedings of the Royal Society B: Biological Sciences 285, no. 1873 (2018): 20172329. http://dx.doi.org/10.1098/rspb.2017.2329.
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Climate change is predicted to increase migration distances for many migratory species, but the physiological and temporal implications of longer migratory journeys have not been explored. Here, we combine information about species' flight range potential and migratory refuelling requirements to simulate the number of stopovers required and the duration of current migratory journeys for 77 bird species breeding in Europe. Using tracking data, we show that our estimates accord with recorded journey times and stopovers for most species. We then combine projections of altered migratory distances under climate change with models of avian flight to predict future migratory journeys. We find that 37% of migratory journeys undertaken by long-distance migrants will necessitate an additional stopover in future. These greater distances and the increased number of stops will substantially increase overall journey durations of many long-distance migratory species, a factor not currently considered in climate impact studies.
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Wieringa, Jamin G., Bryan C. Carstens, and H. Lisle Gibbs. "Predicting migration routes for three species of migratory bats using species distribution models." PeerJ 9 (April 16, 2021): e11177. http://dx.doi.org/10.7717/peerj.11177.
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Understanding seasonal variation in the distribution and movement patterns of migratory species is essential to monitoring and conservation efforts. While there are many species of migratory bats in North America, little is known about their seasonal movements. In terms of conservation, this is important because the bat fatalities from wind energy turbines are significant and may fluctuate seasonally. Here we describe seasonally resolved distributions for the three species that are most impacted by wind farms (Lasiurus borealis (eastern red bat), L. cinereus (hoary bat) and Lasionycteris noctivagans (silver-haired bat)) and use these distributions to infer their most likely migratory pathways. To accomplish this, we collected 2,880 occurrence points from the Global Biodiversity Information Facility over five decades in North America to model species distributions on a seasonal basis and used an ensemble approach for modeling distributions. This dataset included 1,129 data points for L. borealis, 917 for L. cinereus and 834 for L. noctivagans. The results suggest that all three species exhibit variation in distributions from north to south depending on season, with each species showing potential migratory pathways during the fall migration that follow linear features. Finally, we describe proposed migratory pathways for these three species that can be used to identify stop-over sites, assess small-scale migration and highlight areas that should be prioritized for actions to reduce the effects of wind farm mortality.
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Dunn, Daniel C., Autumn-Lynn Harrison, Corrie Curtice, et al. "The importance of migratory connectivity for global ocean policy." Proceedings of the Royal Society B: Biological Sciences 286, no. 1911 (2019): 20191472. http://dx.doi.org/10.1098/rspb.2019.1472.
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The distributions of migratory species in the ocean span local, national and international jurisdictions. Across these ecologically interconnected regions, migratory marine species interact with anthropogenic stressors throughout their lives. Migratory connectivity, the geographical linking of individuals and populations throughout their migratory cycles, influences how spatial and temporal dynamics of stressors affect migratory animals and scale up to influence population abundance, distribution and species persistence. Population declines of many migratory marine species have led to calls for connectivity knowledge, especially insights from animal tracking studies, to be more systematically and synthetically incorporated into decision-making. Inclusion of migratory connectivity in the design of conservation and management measures is critical to ensure they are appropriate for the level of risk associated with various degrees of connectivity. Three mechanisms exist to incorporate migratory connectivity into international marine policy which guides conservation implementation: site-selection criteria, network design criteria and policy recommendations. Here, we review the concept of migratory connectivity and its use in international policy, and describe the Migratory Connectivity in the Ocean system, a migratory connectivity evidence-base for the ocean. We propose that without such collaboration focused on migratory connectivity, efforts to effectively conserve these critical species across jurisdictions will have limited effect.
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Sainz-Borgo, Cristina. "¿Que sabemos sobre las aves migratorias de Caracas?" SABER 34 (May 27, 2022): 33–45. https://doi.org/10.5281/zenodo.7742904.
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<strong>RESUMEN</strong> La ciudad de Caracas presenta una gran diversidad de aves, sin embargo, es poca la información disponible sobre las especies migratorias que la visitan. El objetivo de esta revisión consistió en realizar una compilación de las especies migratorias registradas en la ciudad. Para la elaboración de este estudio se consultaron las fuentes bibliográficas disponibles en revistas científicas, guías de aves y la página web eBird. Como resultado, se recopilaron avistamientos de 51 especies migratorias boreales, dos migratorias australes, y 12 especies con poblaciones residentes y migratorias. La familia con mayor diversidad fue Parulidae, con 16 especies, seguida por Scolopacidae, con 10 especies, e Hirundinidae con cinco. Todas migratorias del norte. Las especies con mayor cantidad de avistamientos fueron los parulidos Reinita de Charcos (<em>Parkesia noveboracensis</em>) (n = 91), Candelita Migratoria (<em>Setophaga ruticilla</em>) (n = 82) y Canario de Mangle (<em>Setophaga petechia</em>) (n = 42). Entre los avistamientos más resaltantes está el Chicuaco Cuello Rojo (<em>Butorides virecens</em>), una especie rara, con pocas observaciones para el país. Otras especies poco comunes, con solo uno o dos reportes para Caracas, son la Reinita de Louisiana (<em>Parkesia motacilla</em>), el Turpial Migratorio (<em>Icterus gálbula</em>) y el Pájaro Arrocero (<em>Dolichonyx oryzivora</em>), o consideradas como probables como la Reinita Atigrada (<em>Dendroica tigrina</em>), de la que aún no se tiene registro. Estos resultados muestran la importancia de bases de datos como eBird y Citizen Science para el conocimiento de la avifauna del mundo. <strong>Abstract</strong> The city of Caracas has a large number of bird species, however, scientific publications regarding the migratory species that visit it is very poor. The objective of this study consisted of making a compilation of the migratory species reported for the city. For the elaboration of this study, bibliographic sources available in scientific journals, bird guides and the eBird page were consulted. As a result, 51 northern migratory species were identified, two austral migratory, and 12 species with resident and migratory populations. The most diverse family was Parulidae with 17 species, followed by Scolopacidae, with 10 species, and Hirundinidae, with four. All migratory from the north. The species with the highest number of sightings were the parulidae Northern Waterthrush <em>(Parkesia noveboracensis</em>) (n = 91), American Redstart (<em>Setophaga ruticilla</em>) (n = 82) and Yellow Warbler (<em>Setophaga petechia</em>) (n = 42). Among the most important sightings is the Green Heron (<em>Butorides virescens</em>), a rare species, with few observations for the country. Other rare species, with only one or two reports for Caracas, were Louisiana Waterthrush (<em>Parkesia motacilla</em>), Baltimore Oriole (<em>Icterus galbula</em>) and Bobolink (<em>Dolichonyx oryzivora</em>), and species considered probable as Cape May Warbler (<em>Dendroica tigrina</em>), of which there is no record yet. These results show the importance of databases such as eBird and the Citizen Science for the knowledge of the world's avifauna.
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Jaman, Mohammad Firoj, Ashikur Rahman Shome, Md Fazle Rabbe, et al. "Community structure, threats and conservation issues of migratory birds in the south-central coastal area of Bangladesh." Dhaka University Journal of Biological Sciences 34, no. 1 (2025): 155–73. https://doi.org/10.3329/dujbs.v34i1.79868.
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The coastal areas of Bangladesh are enriched with migratory avian species but the actual status of birds was unknown, particularly in the south-central coastal region of the country. A yearlong (June 2023 to May 2024) direct field observation-based study was conducted to unfold the present status of the migratory avifauna in three protected areas (Kuakata National Park, Tangragiri Wildlife Sanctuary, and Sonarchar Wildlife Sanctuary). In this study, a total of 85 migratory bird species were recorded under 10 orders and 22 families. Individuals of wetland dependent migratory birds were higher than other bird species. Sonarchar Wildlife Sanctuary (SWS) had the highest number of bird species and individuals (70 species; n = 3618 individuals) with the highest diversity index values (H’ = 3.135, Ds = 0.9257) compared to two other sites. Significant variations among migratory avian communities were found among the three study sites as indicated by the Analysis of Similarity (ANOSIM) test (R = 0.168, P < 0.001) in the non-metric multidimensional plot (NMDs). Among the migratory bird species, Charadrius dubius (14.75%), Anas crecca (14.33%), Threskiornis melanocephalus (11.69%), Actitis hypoleucos 8.47%), Vanellus cinereus (6.75%) were the most abundant. Population abundance was higher for the occurrence of the wetland dependent migratory bird species in the study area. Avian community composition of migratory species showed uneven distribution in the rank abundance curve. Across the three study sites, the majority of the migratory bird species exhibited clumped distribution patterns, followed by regular and random distribution patterns. A total of 37 (45.12%) species of migratory birds were found to use the coastline as their microhabitat. Unplanned fishing, tourism, expansion of agricultural land, hunting, and pollution were identified as major threats to the migratory bird species in the study area. This study suggests community-based conservation measures are essential for the proper conservation of the migratory birds. Dhaka Univ. J. Biol. Sci. 34(1): 155-173, 2025 (January)
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Wieringa, Jamin G., Bryan C. Carstens, and H. Lisle Gibbs. "Predicting migration routes for three species of migratory bats using species distribution models." PeerJ 9 (June 12, 2021): e11177. https://doi.org/10.5281/zenodo.13426326.
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(Uploaded by Plazi for the Bat Literature Project) Understanding seasonal variation in the distribution and movement patterns of migratory species is essential to monitoring and conservation efforts. While there are many species of migratory bats in North America, little is known about their seasonal movements. In terms of conservation, this is important because the bat fatalities from wind energy turbines are significant and may fluctuate seasonally. Here we describe seasonally resolved distributions for the three species that are most impacted by wind farms (Lasiurus borealis (eastern red bat), L. cinereus (hoary bat) and Lasionycteris noctivagans (silver-haired bat)) and use these distributions to infer their most likely migratory pathways. To accomplish this, we collected 2,880 occurrence points from the Global Biodiversity Information Facility over five decades in North America to model species distributions on a seasonal basis and used an ensemble approach for modeling distributions. This dataset included 1,129 data points for L. borealis, 917 for L. cinereus and 834 for L. noctivagans. The results suggest that all three species exhibit variation in distributions from north to south depending on season, with each species showing potential migratory pathways during the fall migration that follow linear features. Finally, we describe proposed migratory pathways for these three species that can be used to identify stop-over sites, assess small-scale migration and highlight areas that should be prioritized for actions to reduce the effects of wind farm mortality.
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Wieringa, Jamin G., Bryan C. Carstens, and H. Lisle Gibbs. "Predicting migration routes for three species of migratory bats using species distribution models." PeerJ 9 (June 7, 2021): e11177. https://doi.org/10.5281/zenodo.13426326.
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(Uploaded by Plazi for the Bat Literature Project) Understanding seasonal variation in the distribution and movement patterns of migratory species is essential to monitoring and conservation efforts. While there are many species of migratory bats in North America, little is known about their seasonal movements. In terms of conservation, this is important because the bat fatalities from wind energy turbines are significant and may fluctuate seasonally. Here we describe seasonally resolved distributions for the three species that are most impacted by wind farms (Lasiurus borealis (eastern red bat), L. cinereus (hoary bat) and Lasionycteris noctivagans (silver-haired bat)) and use these distributions to infer their most likely migratory pathways. To accomplish this, we collected 2,880 occurrence points from the Global Biodiversity Information Facility over five decades in North America to model species distributions on a seasonal basis and used an ensemble approach for modeling distributions. This dataset included 1,129 data points for L. borealis, 917 for L. cinereus and 834 for L. noctivagans. The results suggest that all three species exhibit variation in distributions from north to south depending on season, with each species showing potential migratory pathways during the fall migration that follow linear features. Finally, we describe proposed migratory pathways for these three species that can be used to identify stop-over sites, assess small-scale migration and highlight areas that should be prioritized for actions to reduce the effects of wind farm mortality.
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Wildbacher, Michaela, Julia Andronache, Katharina Pühringer, Stefanie Dobrovolny, Rupert Hochegger, and Margit Cichna-Markl. "Authentication of EU-Authorized Edible Insect Species in Food Products by DNA Barcoding and High-Resolution Melting (HRM) Analysis." Foods 14, no. 5 (2025): 751. https://doi.org/10.3390/foods14050751.
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The consumption of edible insects is a promising approach to meet the increasing global demand for food. Commercialization of edible insects in the EU is regulated by the Novel Food regulation. To date, the yellow mealworm (Tenebrio molitor larva), the migratory locust (Locusta migratoria), the house cricket (Acheta domesticus), and the buffalo worm (Alphitobius diaperinus larva) have been authorized in the EU for human consumption. We aimed to develop a method based on DNA barcoding and high-resolution melting (HRM) analysis for the identification and differentiation of these four EU-authorized edible insect species in food. A primer pair previously designed for DNA metabarcoding, targeting a ~200 bp sequence of mitochondrial 16S rDNA, allowed discrimination between the four insect species in highly processed food. However, house cricket and migratory locust could not unambiguously be differentiated from tropical house cricket, desert locust, superworm, cowpea weevil, and sago worm, respectively. This problem could be solved by designing primers specific for house cricket and migratory locust. By combining these primers with the insect primers, additional polymerase chain reaction (PCR) products for house cricket and migratory locust were obtained, resulting in more complex melt curves compared to the unauthorized insect species. The optimized PCR-HRM assay is a very cost-efficient screening tool for authentication of EU-authorized edible insect species in food.
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Main, Martin B., Mary C. Christman, Annisa Karim, and Mark Hostetler. "Species Richness and Diversity of Resident and Migratory Landbirds in Remnant Forest Patches and Residential Areas in the Florida Keys, USA." International Journal of Ecology 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/364213.
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Conservation of migratory birds necessitates protecting suitable stopover habitat along migratory routes as well as destination habitats, especially near large geographic barriers such as the Gulf of Mexico. The Florida Keys (Keys) are an important stopover and breeding destination for migratory landbirds. We documented 47 migratory and 21 resident landbird species via point counts during March–May 2004 and 2005. As a group, species richness, species diversity, and the effective number of species of migratory landbirds, including several species of conservation concern, was significantly and positively associated with percent cover of tropical hardwood hammock, a threatened upland forest type. The collective resident landbird community in the Keys was negatively associated with native hammock cover, although species diversity of the resident community was positively associated with the proximity of native hammock and several resident species, including species of conservation concern, were commonly or predominantly associated with native hammock. Consequently, conservation of native hammock habitat in the Keys is an important conservation priority for migratory birds and several resident species of conservation concern.
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Risely, Alice, Marcel Klaassen, Bethany J. Hoye, and Jason Chapman. "Migratory animals feel the cost of getting sick: A meta‐analysis across species." Journal of Animal Ecology 87, no. 1 (2018): 301–14. https://doi.org/10.5281/zenodo.13433068.
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(Uploaded by Plazi for the Bat Literature Project) Abstract Migratory animals are widely assumed to play an important role in the long‐distance dispersal of parasites, and are frequently implicated in the global spread of zoonotic pathogens such as avian influenzas in birds and Ebola viruses in bats. However, infection imposes physiological and behavioural constraints on hosts that may act to curtail parasite dispersal via changes to migratory timing ("migratory separation") and survival ("migratory culling"). There remains little consensus regarding the frequency and extent to which migratory separation and migratory culling may operate, despite a growing recognition of the importance of these mechanisms in regulating transmission dynamics in migratory animals. We quantitatively reviewed 85 observations extracted from 41 studies to examine how both infection status and infection intensity are related to changes in body stores, refuelling rates, movement capacity, phenology and survival in migratory hosts across taxa. Overall, host infection status was weakly associated with reduced body stores, delayed migration and lower survival, and more strongly associated with reduced movement. Infection intensity was not associated with changes to host body stores, but was associated with moderate negative effects on movement, phenology and survival. In conclusion, we found evidence for negative effects of infection on host phenology and survival, but the effects were relatively small. This may have implications for the extent to which migratory separation and migratory culling act to limit parasite dispersal in migratory systems. We propose a number of recommendations for future research that will further advance our understanding of how migratory separation and migratory culling may shape host–parasite dynamics along migratory routes globally.
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Risely, Alice, Marcel Klaassen, Bethany J. Hoye, and Jason Chapman. "Migratory animals feel the cost of getting sick: A meta‐analysis across species." Journal of Animal Ecology 87, no. 1 (2018): 301–14. https://doi.org/10.5281/zenodo.13433068.
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(Uploaded by Plazi for the Bat Literature Project) Abstract Migratory animals are widely assumed to play an important role in the long‐distance dispersal of parasites, and are frequently implicated in the global spread of zoonotic pathogens such as avian influenzas in birds and Ebola viruses in bats. However, infection imposes physiological and behavioural constraints on hosts that may act to curtail parasite dispersal via changes to migratory timing ("migratory separation") and survival ("migratory culling"). There remains little consensus regarding the frequency and extent to which migratory separation and migratory culling may operate, despite a growing recognition of the importance of these mechanisms in regulating transmission dynamics in migratory animals. We quantitatively reviewed 85 observations extracted from 41 studies to examine how both infection status and infection intensity are related to changes in body stores, refuelling rates, movement capacity, phenology and survival in migratory hosts across taxa. Overall, host infection status was weakly associated with reduced body stores, delayed migration and lower survival, and more strongly associated with reduced movement. Infection intensity was not associated with changes to host body stores, but was associated with moderate negative effects on movement, phenology and survival. In conclusion, we found evidence for negative effects of infection on host phenology and survival, but the effects were relatively small. This may have implications for the extent to which migratory separation and migratory culling act to limit parasite dispersal in migratory systems. We propose a number of recommendations for future research that will further advance our understanding of how migratory separation and migratory culling may shape host–parasite dynamics along migratory routes globally.
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Sodhi, Navjot S. "Parasitic infection of migratory bird species." Trends in Ecology & Evolution 10, no. 10 (1995): 417–18. http://dx.doi.org/10.1016/s0169-5347(00)89162-4.
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McGuire, Liam P., and John M. Ratcliffe. "Light enough to travel: migratory bats have smaller brains, but not larger hippocampi, than sedentary species." Biology Letters 7, no. 2 (2010): 233–36. http://dx.doi.org/10.1098/rsbl.2010.0744.
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Migratory bird species have smaller brains than non-migratory species. The behavioural flexibility/migratory precursor hypothesis suggests that sedentary birds have larger brains to allow the behavioural flexibility required in a seasonally variable habitat. The energy trade-off hypothesis proposes that brains are heavy, energetically expensive and therefore, incompatible with migration. Here, we compared relative brain, neocortex and hippocampus volume between migratory and sedentary bats at the species-level and using phylogenetically independent contrasts. We found that migratory bats had relatively smaller brains and neocortices than sedentary species. Our results support the energy trade-off hypothesis because bats do not exhibit the same degree of flexibility in diet selection as sedentary birds. Our results also suggest that bat brain size differences are subtler than those found in birds, perhaps owing to bats' shorter migration distances. Conversely, we found no difference in relative hippocampus volume between migratory and sedentary species, underscoring our limited understanding of the role of the hippocampus in bats.
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MØLLER, Anders P., Laszlo Zsolt Garamszegi, Juan Manuel Peralta-Sánchez, and Juan José Soler. "Migratory divides and their consequences for dispersal, population size and parasite–host interactions." journal of evolutionary biology 24, no. 2011 (2011): 1744–55. https://doi.org/10.1111/j.1420-9101.2011.02302.x.
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Populations of migratory birds differ in their direction of migration withneighbouring populations often migrating in divergent directions separated bymigratory divides. A total of 26% of 103 passerine bird species in Europe hadmigratory divides that were located disproportionately often along a longitudinalgradient in Central Europe, consistent with the assumption of aQuaternary glacial origin of such divides in the Iberian and Balkan peninsulasfollowed by recolonization. Given that studies have shown significant geneticdifferentiation and reduced gene flow across migratory divides, we hypothesizedthat an absence of migratory divides would result in elevated rates of geneflow and hence a reduced level of local adaptation. In a comparative study,species with migratory divides had larger population sizes and populationdensities and longer dispersal distances than species without migratory divides.Species with migratory divides tended to be habitat generalists. Bird specieswith migratory divides had higher richness of blood parasites and higher growthrates of Staphylococcus on their eggs during the incubation period. There wasweaker cell-mediated immunity in adults and stronger cell lysis in species withmigratory divides. These findings may suggest that migratory divides constitutebarriers to dispersal with consequences for ecology and evolution of distributions,population sizes, habitats and parasite–host interactions. They alsosuggest that migratory divides may play a role in local adaptation in host–parasite interactions.
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Winger, Benjamin M., Irby J. Lovette, and David W. Winkler. "Ancestry and evolution of seasonal migration in the Parulidae." Proceedings of the Royal Society B: Biological Sciences 279, no. 1728 (2011): 610–18. http://dx.doi.org/10.1098/rspb.2011.1045.
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Seasonal migration in birds is known to be highly labile and subject to rapid change in response to selection, such that researchers have hypothesized that phylogenetic relationships should neither predict nor constrain the migratory behaviour of a species. Many theories on the evolution of bird migration assume a framework that extant migratory species have evolved repeatedly and relatively recently from sedentary tropical or subtropical ancestors. We performed ancestral state reconstructions of migratory behaviour using a comprehensive, well-supported phylogeny of the Parulidae (the ‘wood-warblers’), a large family of Neotropical and Nearctic migratory and sedentary songbirds, and examined the rates of gain and loss of migration throughout the Parulidae. Counter to traditional hypotheses, our results suggest that the ancestral wood-warbler was migratory and that losses of migration have been at least as prevalent as gains throughout the history of Parulidae. Therefore, extant sedentary tropical radiations in the Parulidae represent losses of latitudinal migration and colonization of the tropics from temperate regions. We also tested for phylogenetic signal in migratory behaviour, and our results indicate that although migratory behaviour is variable within some wood-warbler species and clades, phylogeny significantly predicts the migratory distance of species in the Parulidae.
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Semmens, Darius J., James E. Diffendorfer, Laura López-Hoffman, and Carl D. Shapiro. "Accounting for the ecosystem services of migratory species: Quantifying migration support and spatial subsidies." Ecological Economics 70, no. 12 (2011): 2236–42. https://doi.org/10.5281/zenodo.13412419.
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(Uploaded by Plazi for the Bat Literature Project) Migratory species support ecosystem process and function in multiple areas, establishing ecological linkages between their different habitats. As they travel, migratory species also provide ecosystem services to people in many different locations. Previous research suggests there may be spatial mismatches between locations where humans use services and the ecosystems that produce them. This occurs with migratory species, between the areas that most support the species' population viability – and hence their long-term ability to provide services – and the locations where species provide the most ecosystem services. This paper presents a conceptual framework for estimating how much a particular location supports the provision of ecosystem services in other locations, and for estimating the extent to which local benefits are dependent upon other locations. We also describe a method for estimating the net payment, or subsidy, owed by or to a location that balances benefits received and support provided by locations throughout the migratory range of multiple species. The ability to quantify these spatial subsidies could provide a foundation for the establishment of markets that incentivize cross-jurisdictional cooperative management of migratory species. It could also provide a mechanism for resolving conflicts over the sustainable and equitable allocation of exploited migratory species.
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Semmens, Darius J., James E. Diffendorfer, Laura López-Hoffman, and Carl D. Shapiro. "Accounting for the ecosystem services of migratory species: Quantifying migration support and spatial subsidies." Ecological Economics 70, no. 12 (2011): 2236–42. https://doi.org/10.5281/zenodo.13412419.
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(Uploaded by Plazi for the Bat Literature Project) Migratory species support ecosystem process and function in multiple areas, establishing ecological linkages between their different habitats. As they travel, migratory species also provide ecosystem services to people in many different locations. Previous research suggests there may be spatial mismatches between locations where humans use services and the ecosystems that produce them. This occurs with migratory species, between the areas that most support the species' population viability – and hence their long-term ability to provide services – and the locations where species provide the most ecosystem services. This paper presents a conceptual framework for estimating how much a particular location supports the provision of ecosystem services in other locations, and for estimating the extent to which local benefits are dependent upon other locations. We also describe a method for estimating the net payment, or subsidy, owed by or to a location that balances benefits received and support provided by locations throughout the migratory range of multiple species. The ability to quantify these spatial subsidies could provide a foundation for the establishment of markets that incentivize cross-jurisdictional cooperative management of migratory species. It could also provide a mechanism for resolving conflicts over the sustainable and equitable allocation of exploited migratory species.
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N. Taghiyev, A. "THE CHANGES OCCURRED IN THE WINTERING BEHAVIOR OF THE MIGRATORY-WINTERING RED BOOK SPECIES OF THE ANSERIFORMES IN THE GIZILAGHAJ BAY." Advances in Biology & Earth Sciences 9, no. 3 (2024): 347–53. https://doi.org/10.62476/abes93347.
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In 2018-2024, the effect of the lowering of the water level in the Caspian Sea on the wintering behavior of the migratory-wintering species from the order of Anseriformes included in the 3rd edition of the Red Book of the Republic of Azerbaijan (2023) was studied in the Gizilaghaj Bay which is one of the largest wintering places of the birds in Eurasia. 10 migratory-wintering species (Branta ruficollis, Anser erythropus, Cygnus olor, Cygnus bewickii, Marmaronetta angustirostris, Aythya ferina, Aythya nyroca, Clangula hyemalis, Melanitta fusca, Oxyura leucocephala) from the Anseriformes order were included in the Red Book of Azerbaijan. 9 of them are the migratory-wintering species. Only Aythya nyroca has a migratory-wintering population as well as a sedentary one. The migratory-wintering species included in the Red Book come to the research area from the Northern European countries, Russia and the North of Kazakhstan. The lowering of the water level in the Caspian Sea caused a change in the wintering behavior of the migratory-wintering species in the Gizilaghaj Bay.
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McGuire, Liam P., and John M. Ratcliffe. "Light enough to travel: migratory bats have smaller brains, but not larger hippocampi, than sedentary species." Biology Letters 7, no. 2 (2011): 233–36. https://doi.org/10.5281/zenodo.13444147.
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(Uploaded by Plazi for the Bat Literature Project) Migratory bird species have smaller brains than non-migratory species. The behavioural flexibility/migratory precursor hypothesis suggests that sedentary birds have larger brains to allow the behavioural flexibility required in a seasonally variable habitat. The energy trade-off hypothesis proposes that brains are heavy, energetically expensive and therefore, incompatible with migration. Here, we compared relative brain, neocortex and hippocampus volume between migratory and sedentary bats at the species-level and using phylogenetically independent contrasts. We found that migratory bats had relatively smaller brains and neocortices than sedentary species. Our results support the energy trade-off hypothesis because bats do not exhibit the same degree of flexibility in diet selection as sedentary birds. Our results also suggest that bat brain size differences are subtler than those found in birds, perhaps owing to bats' shorter migration distances. Conversely, we found no difference in relative hippocampus volume between migratory and sedentary species, underscoring our limited understanding of the role of the hippocampus in bats.
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McGuire, Liam P., and John M. Ratcliffe. "Light enough to travel: migratory bats have smaller brains, but not larger hippocampi, than sedentary species." Biology Letters 7, no. 2 (2011): 233–36. https://doi.org/10.5281/zenodo.13444147.
Full textAbstract:
(Uploaded by Plazi for the Bat Literature Project) Migratory bird species have smaller brains than non-migratory species. The behavioural flexibility/migratory precursor hypothesis suggests that sedentary birds have larger brains to allow the behavioural flexibility required in a seasonally variable habitat. The energy trade-off hypothesis proposes that brains are heavy, energetically expensive and therefore, incompatible with migration. Here, we compared relative brain, neocortex and hippocampus volume between migratory and sedentary bats at the species-level and using phylogenetically independent contrasts. We found that migratory bats had relatively smaller brains and neocortices than sedentary species. Our results support the energy trade-off hypothesis because bats do not exhibit the same degree of flexibility in diet selection as sedentary birds. Our results also suggest that bat brain size differences are subtler than those found in birds, perhaps owing to bats' shorter migration distances. Conversely, we found no difference in relative hippocampus volume between migratory and sedentary species, underscoring our limited understanding of the role of the hippocampus in bats.
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Garvon, Jason M., Alan M. Fedynich, Markus J. Peterson, and Danny B. Pence. "Helminth Community Dynamics in Populations of Blue-Winged Teal (Anas discors) Using Two Distinct Migratory Corridors." Journal of Parasitology Research 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/306257.
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The influence of spatially distinct host subpopulations on helminth community structure and pattern was examined in a migratory avian host species. Forty helminth species represented by 24,082 individuals were collected from 184 blue-winged teal (Anas discors; BWT) from 2 primary migratory corridors in Florida (eastern migratory corridor; EMC) and Louisiana and Texas (western migratory corridor; WMC). Mean species richness was greater in BWT from the WMC (x¯±S.E=10.2 ± 0.3species) than the EMC (8.6 ± 0.2). The helminth community from the WMC had higher abundances of 6 common/intermediate species. Corridor helminth communities were similar in species composition but less similar when incorporating abundances of those species. Overlapping distributions of phylogenetically related host species that share generalist helminth species across ecologically similar habitats seem to mitigate the isolating mechanisms that are necessary for the distinct coevolutionary pathways to develop between adjacent corridors.
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Ganiev, Bunyod N., Nodirjon N. Azimov, and Bakhtiyor R. Kholmatov. "A comparative study of spring avifauna in natural biotopes and agricultural landscapes of the Tashkent Region, Uzbekistan." Acta Biologica Sibirica 10 (September 27, 2024): 1103–20. https://doi.org/10.5281/zenodo.13920029.
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Between 2014 and 2022, a comprehensive analysis was conducted to compare the spring diversity of avifauna, including bird occurrence, density, similarity, and differences between natural biotopes and agrarian landscapes in the Tashkent region. This study assessed changes in avifauna composition resulting from the conversion of natural biotopes into cultivated areas and evaluated the influence of anthropogenic factors on bird behavior. During the spring months of March, April, and May, approximately 205 bird species were recorded. Of these, 186 species were observed in natural biotopes, while 162 species were identified in agrarian landscapes. Notably, 143 species were common to both biotopes, whereas 43 species were exclusive to natural biotopes, and 19 species were found only in agrarian landscapes. The spring avifauna was classified into six categories based on their occurrence: Resident (51 species), Breeding-Migratory (75 species), Migratory-Wintering (34 species), Migratory (25 species), Breeding-Migratory-Wintering (11 species), and Wintering (9 species). The study included a comparative evaluation of bird diversity in natural biotopes and agrocenoses.
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Kononenko, Ye D. "Migratory species of wild animals as objects of the animal world of Ukraine." Uzhhorod National University Herald. Series: Law 2, no. 87 (2025): 211–15. https://doi.org/10.24144/2307-3322.2025.87.2.31.
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The issue of classifying migratory species of wild animals as objects of the animal world is examined in accordance with doctrinal definitions and legal terminology. The author presents and supplements a scientific definition of the term «animal world.» The term «wild animals» is analyzed, and their main characteristics are identified. Emphasis is placed on the generic affiliation of migratory animals to wild animals, and their specific biological features that are significant for the legal regulation of the protection, use, and reproduction of such species are highlighted. The state of natural freedom is necessary for migratory animals to meet their basic biological needs: appropriate temperature conditions of the surrounding natural environment, sufficient food resources, and safe places for reproduction. The spatial and temporal peculiarities of the life activity of animals that undergo migration are noted. It is substantiated that migratory species of wild animals live not only on the territories of different countries but also within the territory of Ukraine. The place of residence of such species depends on the trajectory and length of the migratory route. The territory of Ukraine can be either a part of the migratory path, its starting point, endpoint, or intermediate link, as well as a space beyond which the respective species moves for migration purposes. Attention is drawn to such objects of the animal world as parts of migratory species of wild animals and the products of their life activity. The concept of migratory species of wild animals as both a component of the animal world and its objects is differentiated. The Law of Ukraine «On the Animal World» identifies certain objects of legal regulation, such as the habitats and structures of migratory animals, their breeding grounds, bird nesting colonies, permanent or temporary animal aggregations, spawning areas, and migratory routes. These objects of legal regulation are not identical to the objects of the animal world; they are separate material assets that are subject to protection together with living organisms. It is concluded that migratory species of wild animals are both an integral part of the animal world and its objects, the protection, use, and reproduction of which are regulated by the Law of Ukraine «On the Animal World.» Their specific characteristics, such as the temporary nature of their residence in Ukraine and periodic cross-border movements, necessitate the separation of migratory animals as a distinct object of the animal world with special legal regulation.
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Mei, Xinyue. "Effect of Climate Change and Loss of Habitat on Migratory Birds." Transactions on Environment, Energy and Earth Sciences 3 (November 26, 2024): 288–93. https://doi.org/10.62051/z05p0q25.
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Climate change and habitat loss have influenced many species of organisms globally. Migratory birds are one of the most responsive animals towards climate change and habitat disruption, many species of migratory birds have a rapid decline in population in recent years because of these two factors. The aim of this article is to conclude information among the data available to achieve a better understanding of the challenges faced by migratory birds under the situation of climate change and suggest ways of preserving these species of migratory birds. This paper is mainly focused on the effects on migratory birds, especially from a perspective of a decline in population, caused by climate change and habitat loss caused by both natural and human factors. Causes such as frequent forest fires and early, warm springs are discussed in this paper. The effect on migratory birds by warm springs is causing a mismatch between food availability and breeding peak, causing inefficient breeding in many species of migratory birds, while the habitat loss caused by increasing forest fires is causing a decline in the population of migratory birds by not only decreasing their efficiency in breeding but also forced them to migrate to a less optimum habitat for reproduction.
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Taylor, Caz M., and Richard J. Hall. "Metapopulation models for seasonally migratory animals." Biology Letters 8, no. 3 (2011): 477–80. http://dx.doi.org/10.1098/rsbl.2011.0916.
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Metapopulation models are widely used to study species that occupy patchily distributed habitat, but are rarely applied to migratory species, because of the difficulty of identifying demographically independent subpopulations. Here, we extend metapopulation theory to describe the directed seasonal movement of migratory populations between two sets of habitat patches, breeding and non-breeding, with potentially different colonization and extinction rates between patch types. By extending the classic metapopulation model, we show that migratory metapopulations will persist if the product of the two colonization rates exceeds the product of extinction rates. Further, we develop a spatially realistic migratory metapopulation model and derive a landscape metric—the migratory metapopulation capacity—that determines persistence. This new extension to metapopulation theory introduces an important tool for the management and conservation of migratory species and may also be applicable to model the dynamics of two host–parasite systems.
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Kirby, Jeff S., Alison J. Stattersfield, Stuart H. M. Butchart, et al. "Key conservation issues for migratory land- and waterbird species on the world's major flyways." Bird Conservation International 18, S1 (2008): S49—S73. http://dx.doi.org/10.1017/s0959270908000439.
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AbstractAn estimated 19% of the world's 9,856 extant bird species are migratory, including some 1,600 species of land- and waterbirds. In 2008, 11% of migratory land- and waterbirds were classed by BirdLife International as threatened or near-threatened on the IUCN Red List. Red List indices show that these migrants have become more threatened since 1988, with 33 species deteriorating and just six improving in status. There is also increasing evidence of regional declines. Population trend data show that more Nearctic–Neotropical migrants have declined than increased in North America since the 1980s, and more Palearctic–Afrotropical migrants breeding in Europe declined than increased during 1970–2000. Reviews of the status of migratory raptors show unfavourable conservation status for 51% of species in the African–Eurasian region (in 2005), and 33% of species in Central, South and East Asia (in 2007). Land-use change owing to agriculture is the most frequently cited threat affecting nearly 80% of all threatened and near-threatened species. However, while agricultural intensification on the breeding grounds is often proposed as the major driver of declines in Palearctic–Afrotropical migrants, some species appear to be limited by the quantity and quality of available habitat in non-breeding areas, notably the drylands of tropical Africa. Forest fragmentation in breeding areas has contributed to the declines of Nearctic–Neotropical migrants with deforestation in non-breeding areas another possible factor. Infrastructure development including wind turbines, cables, towers and masts can also be a threat. Over-harvesting and persecution remain serious threats, particularly at key migration locations. Climate change is affecting birds already, is expected to exacerbate all these pressures, and may also increase competition between migratory and non-migratory species. The conservation of migratory birds thus requires a multitude of approaches. Many migratory birds require effective management of their critical sites, and Important Bird Areas (IBAs) provide an important foundation for such action; however to function effectively in conserving migratory species, IBAs need to be protected and the coherence of the network requires regular review. Since many migratory species (c. 55%) are widely dispersed across their breeding or non-breeding ranges, it is essential to address the human-induced changes at the wider landscape scale, a very considerable challenge. Efforts to conserve migratory birds in one part of the range are less effective if unaddressed threats are reducing these species' populations and habitats elsewhere. International collaboration and coordinated action along migration flyways as a whole are thus key elements in any strategy for the conservation of migratory birds.
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Satterfield, Dara A., Peter P. Marra, T. Scott Sillett, and Sonia Altizer. "Responses of migratory species and their pathogens to supplemental feeding." Philosophical Transactions of the Royal Society B: Biological Sciences 373, no. 1745 (2018): 20170094. http://dx.doi.org/10.1098/rstb.2017.0094.
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Migratory animals undergo seasonal and often spectacular movements and perform crucial ecosystem services. In response to anthropogenic changes, including food subsidies, some migratory animals are now migrating shorter distances or halting migration altogether and forming resident populations. Recent studies suggest that shifts in migratory behaviour can alter the risk of infection for wildlife. Although migration is commonly assumed to enhance pathogen spread, for many species, migration has the opposite effect of lowering infection risk, if animals escape from habitats where pathogen stages have accumulated or if strenuous journeys cull infected hosts. Here, we summarize responses of migratory species to supplemental feeding and review modelling and empirical work that provides support for mechanisms through which resource-induced changes in migration can alter pathogen transmission. In particular, we focus on the well-studied example of monarch butterflies and their protozoan parasites in North America. We also identify areas for future research, including combining new technologies for tracking animal movements with pathogen surveillance and exploring potential evolutionary responses of hosts and pathogens to changing movement patterns. Given that many migratory animals harbour pathogens of conservation concern and zoonotic potential, studies that document ongoing shifts in migratory behaviour and infection risk are vitally needed. This article is part of the theme issue ‘Anthropogenic resource subsidies and host–parasite dynamics in wildlife’.
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Oldani, Norberto Oscar, Claudio Rafael Mariano Baigún, John Michael Nestler, and Richard Andrew Goodwin. "Is fish passage technology saving fish resources in the lower La Plata River basin?" Neotropical Ichthyology 5, no. 2 (2007): 89–102. http://dx.doi.org/10.1590/s1679-62252007000200002.
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Over 450 dams have been constructed in the upper Paraná River basin in Brazil during the past 40 years. River regulation by these dams is considered a primary factor in the reduction of fish diversity and depletion of migratory species. In contrast to the upper Paraná Basin, only two large dams (both with upstream fish passage) have been constructed in the lower La Plata River basin. Fishery managers in the lower basin are concerned that existing and planned dams will further deplete populations of migratory fish species that constitute important recreational and commercial fisheries as has occurred in the upper basin. We assessed the sustainability of fisheries in the lower basin in the face of increased river regulation by using literature information to describe the efficiency of the fish passage systems used to mitigate river regulation impacts on fisheries. Our analysis shows that fish passage systems at both lower basin dams, Yacyreta and Salto Grande, fail to transfer sufficient numbers of upstream migrants to sustain populations of migratory species. Fish passage efficiency of target species in the fish elevators at Yacyreta is less than 2%. Fish diversity in the fish elevators is low because about 85% of the fish belong to only three non-migratory species (Pimelodus maculatus, Oxydoras kneri and Rhinodoras dorbignyi). Large migratory species targeted for passage rarely comprise even 5 % of the fish number in the passage system. The two Borland locks at Salto Grande Dam cannot dependably pass large numbers of migratory species because passage efficiency is dependent upon interactions of powerhouse and spillway operation with tailrace elevations. Most species in the Borland system were either a small catfish (Parapimelodus valenciennis) or a engraulid (Lycengraulis grossidens). Again, the targeted migratory species were not abundant in the passage system. We conclude that existing fish passage technology in the lower basin is inadequate and that improved fish passage designs are required to conserve migratory species. These designs must be based on integrated information from geomorphology (habitat), natural fish behavior, fish swimming capabilities, and detailed population studies.
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Gómez, Camila, Nicholas J. Bayly, Ana M. González, et al. "Avances en la investigación sobre aves migratorias neárticas-neotropicales en Colombia y retos para el futuro: trabajos del III Congreso de Ornitología Colombiana, 2010." Ornitología Colombiana, no. 11 (July 12, 2021): 3–13. https://doi.org/10.59517/oc.e255.
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Research on Nearctic-Neotropical migratory birds in Colombia has strengthened in the last decade although most work has been centered on boreal migrants. Achievements are reflected in recent publications, in the studies presented at national ornithology conferences, and in the publication of the National Plan for Conservation of Migratory Species. However, there are still significant information gaps and challenges that must be addressed to guide the conservation of migratory bird populations in decline. During the III Colombian Ornithological Congress in 2010, twelve talks were presented during a symposium on migratory birds. The differentiation of studies between winter and migration periods stood out as a novelty, as well as the presentation of projects aimed at answering questions about the ecology of species instead of showing exclusively descriptive data. Discussions during the symposium generated new research questions and identified current gaps in knowledge. The main conclusion was that there is a need to generate information about the less studied migratory systems like the Neotropical austral, intratropical and local systems. For all systems we need a more comprehensive assessment of species' distribution ranges during stationary periods (or winter) and migration. Habitat use and relative habitat quality for different species, considering body condition and survival between periods, must be investigated as well. Studies on migratory strategies, migratory routes, survival during winter and migration, and on migratory connectivity, should be replicated in more species and locations because they are critical to understanding the mechanisms regulating populations and the conservation needs of each species. Finally, coordinated efforts, the publishing of research findings and the establishment of national and international alliances will be crucial to increase our knowledge on Nearctic-Neotropical-Austral migrants in Colombia.
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Kramer, Gunnar R., David E. Andersen, David A. Buehler, et al. "Population trends inVermivorawarblers are linked to strong migratory connectivity." Proceedings of the National Academy of Sciences 115, no. 14 (2018): E3192—E3200. http://dx.doi.org/10.1073/pnas.1718985115.
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Migratory species can experience limiting factors at different locations and during different periods of their annual cycle. In migratory birds, these factors may even occur in different hemispheres. Therefore, identifying the distribution of populations throughout their annual cycle (i.e., migratory connectivity) can reveal the complex ecological and evolutionary relationships that link species and ecosystems across the globe and illuminate where and how limiting factors influence population trends. A growing body of literature continues to identify species that exhibit weak connectivity wherein individuals from distinct breeding areas co-occur during the nonbreeding period. A detailed account of a broadly distributed species exhibiting strong migratory connectivity in which nonbreeding isolation of populations is associated with differential population trends remains undescribed. Here, we present a range-wide assessment of the nonbreeding distribution and migratory connectivity of two broadly dispersed Nearctic-Neotropical migratory songbirds. We used geolocators to track the movements of 70Vermivorawarblers from sites spanning their breeding distribution in eastern North America and identified links between breeding populations and nonbreeding areas. Unlike blue-winged warblers (Vermivora cyanoptera), breeding populations of golden-winged warblers (Vermivora chrysoptera) exhibited strong migratory connectivity, which was associated with historical trends in breeding populations: stable for populations that winter in Central America and declining for those that winter in northern South America.
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Miller, RL, H. Marsh, C. Benham, and M. Hamann. "Stakeholder engagement in the governance of marine migratory species: barriers and building blocks." Endangered Species Research 43 (September 3, 2020): 1–19. http://dx.doi.org/10.3354/esr01049.
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Meaningful stakeholder engagement is important to collaborative decision-making and to effective polycentric governance, particularly when managing cross-scale environmental issues like those involving marine migratory species. In this paper, we explore the barriers to, and opportunities for, stakeholder involvement in the governance of threats to marine migratory species in eastern Australia, using semi-structured qualitative interviews and a focus group, as an example of the generic problem of managing migratory species within a large range state with multiple jurisdictions. Respondents identified several barriers to, and opportunities for, improved stakeholder involvement in the governance of marine migratory species, corresponding to 4 main themes: decision-making processes, information sharing, institutional structures, and participation processes. Respondents indicated that the governance system protecting marine turtles, dugongs, humpback whales, and non-threatened migratory shorebirds in eastern Australia would benefit from the introduction of new information pathways, reformed institutional structures (including environmental legislation), and improved participatory pathways for non-government stakeholders. Such changes could help harmonise the process of managing these species, leading to more effective conservation management throughout their range.
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Xiao, Hui, Iadine Chadès, Narelle Hill, Nicholas Murray, Richard A. Fuller, and Eve McDonald-Madden. "Conserving migratory species while safeguarding ecosystem services." Ecological Modelling 442 (February 2021): 109442. http://dx.doi.org/10.1016/j.ecolmodel.2021.109442.
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Kitagawa, Takashi, and Yoshinori Aoki. "Viewpoints of high migratory tuna species ecology." Physics of Life Reviews 20 (March 2017): 54–56. http://dx.doi.org/10.1016/j.plrev.2017.01.002.
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Bergin, Anthony. "Conservation and management of highly migratory species." Ocean & Coastal Management 24, no. 2 (1994): 139–44. http://dx.doi.org/10.1016/0964-5691(94)90028-0.
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Hardesty-Moore, Molly, Stefanie Deinet, Robin Freeman, et al. "Migration in the Anthropocene: how collective navigation, environmental system and taxonomy shape the vulnerability of migratory species." Philosophical Transactions of the Royal Society B: Biological Sciences 373, no. 1746 (2018): 20170017. http://dx.doi.org/10.1098/rstb.2017.0017.
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Recent increases in human disturbance pose significant threats to migratory species using collective movement strategies. Key threats to migrants may differ depending on behavioural traits (e.g. collective navigation), taxonomy and the environmental system (i.e. freshwater, marine or terrestrial) associated with migration. We quantitatively assess how collective navigation, taxonomic membership and environmental system impact species' vulnerability by (i) evaluating population change in migratory and non-migratory bird, mammal and fish species using the Living Planet Database (LPD), (ii) analysing the role of collective navigation and environmental system on migrant extinction risk using International Union for Conservation of Nature (IUCN) classifications and (iii) compiling literature on geographical range change of migratory species. Likelihood of population decrease differed by taxonomic group: migratory birds were more likely to experience annual declines than non-migrants, while mammals displayed the opposite pattern. Within migratory species in IUCN, we observed that collective navigation and environmental system were important predictors of extinction risk for fishes and birds, but not for mammals, which had overall higher extinction risk than other taxa. We found high phylogenetic relatedness among collectively navigating species, which could have obscured its importance in determining extinction risk. Overall, outputs from these analyses can help guide strategic interventions to conserve the most vulnerable migrations. This article is part of the theme issue ‘Collective movement ecology'.
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Pacheco-Muñoz, Rodrigo, Adrián Ceja-Madrigal, and Jorge E. Schondube. "Migratory birds benefit from urban environments in a highly anthropized Neotropical region." PLOS ONE 20, no. 1 (2025): e0311290. https://doi.org/10.1371/journal.pone.0311290.
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Land use change from wildlands to urban and productive environments can dramatically transform ecosystem structure and processes. Despite their structural and functional differences from wildlands, human-modified environments offer unique habitat elements for wildlife. In this study, we examined how migratory birds use urban, productive, and wildland environments of a highly anthropized region of Western Mexico known as “El Bajío”. We used Generalized Linear Models to compare species richness, abundance, and the functional traits of migratory bird assemblages among these three environments. Results revealed differences in species richness, composition, and the functional traits of migratory birds among environments. Regardless of wildlands showing medium to high levels of human disturbance, they presented the highest species richness and abundance of migratory birds, with urban environments presenting the lowest values. Insectivorous and granivorous birds were dominant in the migratory bird assemblages of the three environments. The migratory bird assemblages of productive environments had more grassland granivorous birds. In contrast, insectivorous birds with dense habitat preferences and short culmen lengths dominated the urban bird assemblage. Migratory bird assemblages in productive and urban environments showed similar species richness and abundance of insectivorous birds, but they differ in their composition. Our results reveal that urban trees allowed cities to function as simplified forests, showing that the urban environment has the untapped potential to support complex assemblages of migratory birds. To promote migratory birds in human-modified landscapes, we must maintain complex vegetation areas that allow birds with diverse functional traits to overwinter in urban and productive environments.
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Arlt, Debora, and Klaus Reinhardt. "Ejaculate size variation in the migratory locust, Locusta migratoria." Behaviour 140, no. 3 (2003): 319–32. http://dx.doi.org/10.1163/156853903321826657.
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AbstractSperm competition models suggest that ejaculate size (ES) is adjusted in relation to female fecundity and the risk of sperm competition, depending on the information males have about that risk. We tested these ideas in the migratory locust, Locusta migratoria, a species in which ES may be an important male fitness parameter. Copulation duration was positively correlated with ES. Males did not increase copulation duration but sperm transfer in the presence of competitors during mating. They did so only when they were reared in conditions that allowed female perception prior to mating. Males that prior to mating were kept with other males only did not show ES variation with regard to different sex ratios at mating. Increased female availability did not affect ES. A male size and condition related parameter was not significantly correlated to ES but older males delivered smaller ejaculates. Females of larger size were inseminated larger amounts of sperm. There was a positive correlation between female size and ES only for males of lower condition and lower relative testis weight but not for males of good condition or higher relative testis weight.
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Méndez, Verónica, José A. Alves, Böðvar Þórisson, Alina Marca, Tómas G. Gunnarsson, and Jennifer A. Gill. "Individual variation in migratory behavior in a subarctic partial migrant shorebird." Behavioral Ecology 31, no. 3 (2020): 672–79. http://dx.doi.org/10.1093/beheco/araa010.
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Abstract Migratory behavior can differ markedly amongst individuals within populations or species. Understanding the factors influencing this variation is key to understanding how current environmental changes might influence migratory propensity and the distribution and abundance of migratory species across their range. Here, we investigate variation in migratory behavior of the partially migratory Eurasian oystercatcher (Haematopus ostralegus) population breeding in Iceland. We use the resightings of color-ringed adults and stable isotopes to determine whether individuals migrate or remain in Iceland during winter and test whether individual migratory strategies vary in relation to sex, body size, and breeding location. We also explore individual consistency in migratory strategy and test whether assortative mating with respect to strategy occurs in this population. The proportion of migrants and residents varied greatly across breeding locations but not with respect to sex or body size. Individuals were consistent in migratory strategy between years and there was no evidence of assortative mating by migratory strategy. We use these findings to explore factors underlying the evolution and maintenance of partial migration at high latitudes.
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Outlaw, Diana C., Gary Voelker, Borja Mila, and Derek J. Girman. "Evolution of Long-Distance Migration in and Historical Biogeography of Catharus Thrushes: A Molecular Phylogenetic Approach." Auk 120, no. 2 (2003): 299–310. http://dx.doi.org/10.1093/auk/120.2.299.
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Abstract We addressed the evolution of long-distance migration in and the historical biogeography of Catharus thrushes within a phylogenetic framework. Catharus thrushes are a Nearctic–Neotropical genus consisting of five migrant and seven resident species. We reconstructed a molecular phylogeny using a combined analysis of cytochrome-b and ND2 genes. Phylogenetic reconstructions indicate the nonmonophyly of migratory Catharus species. The Neotropics are the most likely ancestral geographic area for the entire lineage, and migratory species are sister to resident taxa whose ranges are restricted to Central America, Mexico, or both. Resident behavior may be ancestral within the lineage, with migratory behavior evolving three times, although confidence in those reconstructions is equivocal in many cases. However, uncertainty in ancestral character states presents an interesting scenario including potential drop-offs of resident species from migratory ancestors.
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Gagarin, Yuri, Abdullah Abdullah, Zulfikar Zulfikar, and Hafizd Ramadhan. "Overstayed Migratory Bird Species on The Coast of Banda Aceh City, Aceh Province." BIOTIK: Jurnal Ilmiah Biologi Teknologi dan Kependidikan 12, no. 2 (2024): 111. http://dx.doi.org/10.22373/biotik.v12i2.23096.
Full textAbstract:
Bird migration is a critical ecological phenomenon influenced by various factors such as temperature changes, food availability, and reproductive cycles. Understanding the dynamics of migratory bird populations within specific regions is essential for conservation efforts. This study aims to identify migratory bird species within Banda Aceh City, focusing on the phenomenon of overstaying migratory birds. Conducted between April and June 2022, data collection took place in several locations, employing the concentration count method. Descriptive data analysis was performed to catalog bird species, and the Shannon-Wiener index was utilized to assess biodiversity. Results revealed the presence of four shorebird species. The study underscores the importance of protecting migratory bird populations in urban environments and highlights the potential impacts of their loss or disruption. Joint conservation efforts are crucial to safeguarding these species, and favorable conditions may encourage some individuals from commonly migrating species to remain in urban areas.