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14 results for “Numenius”
CURLEW_VLAANDEREN - Eurasian curlews (Numenius arquata, Scolopacidae) breeding in Flanders (Belgium)
<p><em>CURLEW_VLAANDEREN - Eurasian curlews (Numenius arquata, Scolopacidae) breeding in Flanders (Belgium)</em> is a bird tracking dataset published by the <a href="https://www.inbo.be/en">Research Institute for Nature and Forest (INBO)</a>. It contains animal tracking data collected by the LifeWatch GPS tracking network for large birds (<a href="http://lifewatch.be/en/gps-tracking-network-large-birds">http://lifewatch.be/en/gps-tracking-network-large-birds</a>) for the project/study <strong>CURLEW_VLAANDEREN</strong>, using trackers developed by Ornitela (<a href="https://www.ornitela.com">https://www.ornitela.com</a>). The study has been operational since 2020. In total 5 individuals of Eurasian curlew (<em>Numenius arquata</em>) have been tagged at several locations in Flanders (Belgium), mainly to study their habitat use and migration behaviour. Data are automatically synced with Movebank and from there periodically archived on Zenodo (see <a href="https://github.com/inbo/bird-tracking">https://github.com/inbo/bird-tracking</a>).</p> <h2>Files</h2> <p>Data in this package are exported from Movebank study <a href="https://www.movebank.org/cms/webapp?gwt_fragment=page=studies,path=study1841091905">1841091905</a>. Fields in the data follow the <a href="http://vocab.nerc.ac.uk/collection/MVB">Movebank Attribute Dictionary</a> and are described in <code>datapackage.json</code>. Files are structured as a <a href="https://specs.frictionlessdata.io/data-package/">Frictionless Data Package</a>. You can access all data in R via <code>https://zenodo.org/records/15696532/files/datapackage.json</code> using <a href="https://frictionlessdata.github.io/frictionless-r/">frictionless</a>.</p> <ul> <li><strong>datapackage.json</strong>: technical description of the data files.</li> <li><strong>CURLEW_VLAANDEREN-reference-data.csv</strong>: reference data about the animals, tags and deployments.</li> <li><strong>CURLEW_VLAANDEREN-gps-yyyy.csv.gz</strong>: GPS data recorded by the tags, grouped by year.</li> </ul> <h2>Acknowledgements</h2> <p>This dataset was collected using infrastructure provided by INBO and funded by Research Foundation - Flanders (FWO) as part of the Belgian contribution to LifeWatch. Additional funding was provided by Provincie Vlaams-Brabant. Data were collected in collaboration with Natuurpunt Studie.</p>
Tracking data for breeding Curlew (Numenius arquata) in north Wales, UK
<p>This dataset of GPS tracking data for Eurasian Curlew (Numenius arquata) forms the basis of the analysis carried out in Bowgen, K. M., Dodd, S. G., Lindley, P., Burton, N. H. K., & Taylor, R. C. (2022). Curves for Curlew: Identifying Curlew breeding status from GPS tracking data. Ecology and Evolution, 12, e9509. https://doi.org/10.1002/ece3.9509.</p> <p>This paper details a new method to assign breeding status to individual birds during their full breeding season. All points are spatially anonymised but the analyses in the associated paper are replicable with this dataset as it only requires spatial and temporal relationships between the points rather than to a specific landscape.</p> <p>Data permissions are held jointly between BTO, National Resources Wales and Royal Society for the Protection of Birds as the funders and collaborators of the project. The study is open to collaboration with the full spatially referenced dataset following application to the BTO via the lead authors.</p> <p>........................................................................................</p> <p>We would also greatly appreciate if you could fill out <a href="https://forms.gle/DCc58VXpdmqnTmTk8" target="_blank" rel="noopener">this very short form</a> to tell us how you intend to use these data. Thanks in advance!</p>
Figure 2 in Is the global decline reflects local declines? A case of the population trend of Far Eastern Curlew Numenius madagascariensis in Banyuasin Peninsula, South Sumatra, Indonesia
Figure 2. Population trend of number of the Far Eastern Curlew in Banyuasin Peninsula from 1984 to 2020.
Figure 3 in Is the global decline reflects local declines? A case of the population trend of Far Eastern Curlew Numenius madagascariensis in Banyuasin Peninsula, South Sumatra, Indonesia
Figure 3. Mix flocks of Far Eastern Curlew and Eurasian Curlew Numenius arquata in flight on 8 November 2020 in Banyuasin Peninsula, South Sumatra province, Indonesia (Photo: Cipto Dwi Handono).
Figure 4 in Is the global decline reflects local declines? A case of the population trend of Far Eastern Curlew Numenius madagascariensis in Banyuasin Peninsula, South Sumatra, Indonesia
Figure 4. Far Eastern Curlew standing at the mudflat on 8 November 2020 in the coastal zone of Banyuasin Peninsula, South Sumatra province, Indonesia (Photo: Cipto Dwi Handono).
Figure 1 in Is the global decline reflects local declines? A case of the population trend of Far Eastern Curlew Numenius madagascariensis in Banyuasin Peninsula, South Sumatra, Indonesia
Figure 1. Map of Banyuasin Peninsula, South Sumatra, Indonesia.
Consistent apparent adult survival and nest-site fidelity of Whimbrel (Numenius phaeopus) near Churchill, Manitoba, Canada over a 40-year period
<p>Reliable estimates of adult survival for many shorebird species are lacking. We used Cormack-Jolly-Seber (CJS) methods to provide an estimate of apparent, or local, survival (φ) of a population of Whimbrels, <em>Numenius phaeopus</em>, breeding in the subarctic Churchill, Manitoba region. We used data collected in two time periods: 1973–1976 and 2010–2014. We also quantified nest-site fidelity in 2010–2014 to provide context to our apparent survival estimates because mark-recapture analyses cannot distinguish between mortality and permanent emigration. The most parsimonious CJS model did not include effects of sex or time on apparent adult survival in either period (φ = 0.76 ± 0.13 SE; φ = 0.75 ± 0.04 SE, 1973 – 1976 and 2010 – 2014, respectively). Additionally, observations of marked Whimbrels between 2010 and 2019 (n = 124) showed that 61 of the 105 marked individuals (58.1%) were resighted. These estimates of return rates are, as expected, much lower than estimates of apparent survival. The median year-to-year distance between nests (n = 139) from 2010 to 2014 was 198 ± 88 m SE and did not differ significantly (<em>p</em> = 0.84) between females (<em>x</em> ̅ = 721.9 ± 119.8 m SE) and males (<em>x</em> ̅ = 720.3 ± 83.1 m SE). If our apparent survival estimate is indicative of true survivorship, then adult mortality during the nonbreeding season has remained constant over the last five decades, implying that the recent decline in Whimbrel populations may stem largely from reduced fecundity, including egg or juvenile survival, rather than primarily from reduced adult survival.</p>
Consistent apparent adult survival and nest-site fidelity of Whimbrel (Numenius phaeopus) near Churchill, Manitoba, Canada over a 40-year period
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Campylomormyrus numenius decontaminated FSCR
<p>.</p>
Bird migration in space and time: chain migration by Eurasian curlew (Numenius arquata arquata) along the East Atlantic Flyway
<p>Migration patterns in birds vary in space and time. Spatial patterns include chain, leap frog, and telescopic migration. Temporal patterns such as migration duration, number and duration of stopovers may vary according to breeding latitude, sex and season. This study aimed to verify these patterns in a long-distance migrant, the Eurasian curlew (<em>Numenius arquata arquata</em>), and to provide a synopsis of spatio-temporal migration patterns in this species of concern throughout the East Atlantic Flyway. We tagged 85 adults with GPS-data loggers in Germany, Poland, France, and Estonia between 2013 and 2019. We computed the distance flown, linear loxodromic distance, duration, stopover number, total stopover duration, mean stopover duration, departure time, and arrival time for 177 out of 187 tracks. On average (± standard deviation), spring migration occurred from April 4–14 (10.2 ± 8.4 days), curlews flew 3,623 ± 1,366 km, and had 5.8 ± 3.6 stopovers, with a duration of 29.4 ± 38.2 h per stopover, while autumn migration occurred from June 18–29 (10.9 ± 9.9 days), curlews flew 3,362 ± 1,351 km, and had 5.4 ± 4.0 stopovers, with 31.8 ± 32.3 h per stopover. Curlews displayed chain migration, because wintering curlews maintained the latitudinal sequence to their breeding sites. Southern curlews had a longer nesting period due to their earlier arrivals. While spring arrival at breeding sites did not differ between the sexes, in autumn females departed earlier than males. Migration duration and distance, as well as stopover number and duration showed a significant increase with breeding site latitude but did not differ between the sexes or between spring and autumn migrations, suggesting that curlews took a comparable amount of time migrating during both seasons. The high site faithfulness in curlews suggests that rapid autumn migration allows them to return to defend their winter foraging areas.</p>
Campylomormyrus numenius decontaminated gx
<p>.</p>
Bird migration in space and time: chain migration by Eurasian curlew (Numenius arquata arquata) along the East Atlantic Flyway
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Data from: Faster migration in autumn than in spring: seasonal migration patterns and non-breeding distribution of Icelandic Whimbrels Numenius phaeopus islandicus
Migration is fundamental in the life of many birds and entails significant energetic and time investments. Given the importance of arrival time in the breeding area and the relatively short period available to reproduce (particularly at high latitudes), it is expected that birds reduce spring migration duration to a greater extent than autumn migration, assuming that pressure to arrive into the wintering area might be relaxed. This has previously been shown for several avian groups, but recent evidence from four tracked Icelandic Whimbrels (Numenius phaeopus islandicus), a long distance migratory wader, suggests that this subspecies tends to migrate faster in autumn than in spring. Here, we (1) investigate differences in seasonal migration duration, migration speed and ground speed of Whimbrels using 56 migrations from 19 individuals tracked with geolocators and (2) map the migration routes, wintering and stopover areas for this population. Tracking methods only provide temporal information on the migration period between departure and arrival. However, migration starts with the fuelling that takes place ahead of departure. Here we estimate the period of first fuelling using published fuel deposition rates and thus explore migration speed using tracking data. We found that migration duration was shorter in autumn than in spring. Migration speed was higher in autumn, with all individuals undertaking a direct flight to the wintering areas, while in spring most made a stopover. Wind patterns could drive Whimbrels to stop in spring, but be more favourable during autumn migration and allow a direct flight. Additionally, the stopover might allow the appraisal of weather conditions closer to the breeding areas and/or improve body condition in order to arrive at the breeding sites with reserves.
Data from: Faster migration in autumn than in spring: seasonal migration patterns and non-breeding distribution of Icelandic Whimbrels Numenius phaeopus islandicus
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