Movement Ecology最新文献

{"title":"Of shared homes and pathways: free-ranging dog movement and habitat use in a human-wildlife landscape in India.","authors":"Sanjana Vadakke Kuruppath, Nilanjan Chatterjee, Ramesh Krishnamurthy","doi":"10.1186/s40462-026-00632-2","DOIUrl":"10.1186/s40462-026-00632-2","url":null,"abstract":"<p><p>BACKGROUND: Free-ranging dogs are widely considered to negatively impact wildlife in shared landscapes. Understanding their use of these landscapes is therefore essential to develop effective management strategies in wildlife-adjacent regions. In this study, we investigated the movement patterns of free-ranging dogs (FRD) in the protected area matrix of Mudumalai Tiger Reserve (MTR) in Southern India. We hypothesized that increased settlement cover would result in a greater human shield effect, allowing dogs more freedom of movement. METHODS: Fifteen owned FRD were collared from two adjacent villages with different levels of human habitation. We estimated dog activity ranges and movement patterns using autocorrelated kernel density estimates (AKDE). Large-scale movement was characterized through multiple metrics (intensity of space use and mean distance from the dog’s home) and compared between villages to understand underlying drivers. Lastly, we quantified fine-scale movement and habitat selection using integrated step selection analysis (iSSA). RESULTS: We found that FRD in MTR had directionally dependent home-ranging behavior and small activity ranges, with the mean AKDE activity range being 9.88 ± 7.69 ha (median = 6.09 ha, range 3.28–26.16 ha), and primarily utilized the area within 500 m of their homes. None of the movement metrics varied significantly between villages except for intensity of use, suggesting that dogs in the less populated village perceived a greater threat from surrounding wildlife and were more driven to seek refuge inside their activity ranges. iSSA revealed that dogs selected strongly for human settled or human-modified habitats, and moved significantly faster in forest land than any other habitat. CONCLUSIONS: Our findings indicate that owned FRD may pose a relatively lower threat to wildlife in MTR than feral dogs. They also support the human shield hypothesis, show that FRD display behavioral plasticity at fine scales of < 5 km, and highlight the role of human land use intensity in shaping the movement of domestic dogs. As humans can thus mediate the potential effects of dogs on wildlife, anthropogenic factors should be taken in consideration when designing management strategies that aim to curb dog movement. </p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12961862/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146215020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stuck in space but not in time: multiple-scale resource selection in a stationary prey.","authors":"Roel May, Craig Ryan Jackson, Justin Wanda, Robert Fyumagwa, Kjetil Bevanger, Eivin Røskaft","doi":"10.1186/s40462-026-00631-3","DOIUrl":"10.1186/s40462-026-00631-3","url":null,"abstract":"<p><strong>Background: </strong>Prey species need to adjust their habitat selection either temporally or spatially to reduce predation risk or human disturbance. We tested the risk allocation hypothesis that poses that foraging is higher in low-risk habitats and during low-risk periods for impala (Aepyceros melampus) in the Serengeti Ecosystem. We expected impalas to select ranges that balance long-term predation risk and forage availability and adjust their habitat utilization within their ranges temporally to balance short-term predation risk and energy intake.</p><p><strong>Methods: </strong>We modelled multi-scale resource selection for 36 GPS-tracked impala (2016-2018) to disentangle spatial and temporal trade-offs between forage acquisition and predation risk using resource selection functions at the landscape and within-home-range level. We contrasted resource selection inside and outside of Serengeti NP (SNP) for woody cover, forage availability (vegetation heterogeneity, NDVI) and risky places (proximity to water, terrain ruggedness). We also modelled responses to diel and lunar cycles in space use.</p><p><strong>Results: </strong>Impalas attuned their resource selection both towards maximizing forage availability and minimizing risk exposure, especially at the landscape level. While home-ranges were generally placed in more homogeneous woodland close to water sources, impalas preferred to use more heterogeneous, open and rugged patches within their home-ranges. They adjusted their responses outside SNP by placing their home-ranges in less rugged terrain and farther from water sources. Impalas balanced foraging and risk temporally by adjusting their preferences to circalunar and diel patterns.</p><p><strong>Conclusions: </strong>Impala attuned their home-range placement and utilization according to the 'landscape of fear' hypothesis inhabiting a 'squeezed' landscape. Here, prey to a functionally diverse carnivore guild clearly balanced their space use between food acquisition and spatio-temporal risk avoidance. Humans, however, acted as a 'super-predator' eliciting a stronger behavioural response compared to natural predators. Following the risk allocation hypothesis, the presence of humans was of such an intensity and predictability that it changed the anti-predator responses in impala compared to the adjacent natural system with carnivores only. A functional response in habitat selection indicated that impala avoided long-term spatial risk in home-range placement, while within their home-ranges short-term temporal risk mimicked the diel patterns observed within the protected area with natural predators only.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12997823/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146159139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of topographic complexity on space-use by a key intertidal grazer in artificial environments.","authors":"Charlotte H Clubley, Louise B Firth, Antony M Knights","doi":"10.1186/s40462-026-00629-x","DOIUrl":"10.1186/s40462-026-00629-x","url":null,"abstract":"<p><p>BACKGROUND: The movement of animals in intertidal environments underpins community structure and is influenced by both abiotic and biotic factors within the environment. Whilst the effects of body size, tidal regime and temperature on the timing and ability of movement have been well-explored, physical features of the environment that generate complexity have received comparatively less attention. Given alterations to the topographic complexity of intertidal habitats associated with climate change and anthropogenic activities, understanding the effects of varying levels of topographic complexity on the movement of intertidal animals is critical to our understanding of biodiversity and ecosystem functioning in these habitats going forward. METHODS: We experimentally manipulated topographic complexity using bespoke concrete panels at two scales, the individual panel and configuration of panels in a modelled 2 × 4 m area, to explore the effects of topographic complexity on the movement of a key intertidal gastropod and ecosystem engineer, the common limpet Patella vulgata. Using a combination of time-lapse photography and correlated random-walk modelling, we ‘scaled-up’ these experimental results to model the effects of topographic complexity on movement and space-use at landscape scales. RESULTS: Results revealed a significant effect of topographic complexity on limpet movement, with greater distances travelled on ‘intermediate’ topographic complexity surfaces (surface areas = 0.08 m2 and 0.09 m2), but more frequent, shorter movements on lowest topographic complexity (surface area = 0.06 m2). At landscape scales, panels with intermediate topographic complexity placed in random configurations at highest spatial cover induced the greatest path lengths of simulated limpets. CONCLUSIONS: This study and its results represent the first experimental assessment of the direct effects of eco-engineered topographic complexity on the small-scale movements of intertidal gastropods and outline a first step towards the mechanistic extrapolation of results to heterogenous landscapes to explore the space-use of gastropods across larger spatial scales. With ongoing changes to intertidal environments resulting from climate change and anthropogenic activities, understanding how the movement of animals is impacted by variation in topographic complexity is essential to predicting future impacts on metapopulation dynamics and ecosystem functioning. </p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12937512/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Miniaturized light-level geolocators provide novel insight into the migration ecology of an endangered songbird.","authors":"John N Macey, Jane M Kunberger, Kellene Collins, Scott Rowin, James M Mueller, Shannon M Carrasco, Melanie R Colón, Nathan Grigsby, Nancy M Raginski, Michael D Gamble, Drew S Finn, Roel Lopez, Ashley M Long","doi":"10.1186/s40462-026-00626-0","DOIUrl":"10.1186/s40462-026-00626-0","url":null,"abstract":"<p><p>Understanding songbird movements throughout their annual cycles is critical to inform conservation planning decisions and management priorities for migratory species. From 2017 to 2020, we attached miniaturized light-level geolocators to 309 male golden-cheeked warblers (Setophaga chrysoparia; hereafter warbler) at five study sites located across the species’ breeding range in Texas. From 2018 to 2021, we recovered data from 61 geolocators and used these data to determine the locations and timing of warbler movements during their non-breeding seasons and to quantify migratory connectivity and migration networks for the species. Mean duration of fall migration (37 d ±19 d) was longer than spring migration (27 d ±14 d), and, on average, second-year warblers initiated fall migration 10 d ±13 d earlier than after-second-year warblers. Migration initiation dates during spring, as well as duration and distance of fall and spring migrations, were similar for both age classes. Overall, 80% of warblers migrated along the Sierra Madre Oriental and Mexico’s Gulf coast between their breeding grounds in Texas and wintering grounds in southern Mexico and Central America during fall and spring; 20% migrated across or eastward around the Gulf of Mexico, primarily in fall. Overall, stopover duration varied along the warbler’s migration route (range = 3–61 d), with the longest stopovers in Texas and along the coast of Tamaulipas and Veracruz in Mexico. The highest percentages of stationary overwintering locations occurred in Chiapas, Mexico (27%), Guatemala (25%), and Honduras (17%), and many warblers used more than one location during winter. Some warblers used areas outside the predicted winter range; one extralimital location was confirmed during field-based surveys in Oaxaca, Mexico. Our results suggested that warblers exhibit weak migratory connectivity and likely disperse widely across the winter range. Given the narrow migration pathway used by most warblers and confined winter range in montane forests, continued and increased conservation along the warbler’s migration route and on the wintering grounds could help ensure population persistence and simultaneously protect co-occurring species.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12947339/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inferring behavioural states from tracking data with hidden Markov models - a validation study using GPS video-camera collars.","authors":"Benjamin Larue, Jonathan J Farr, Libby Ehlers, Jim Herriges, Torsten Bentzen, Michael J Suitor, Kyle Joly, Théo Michelot, Barbara Vuillaume, Steeve D Côté, Eliezer Gurarie, Mark Hebblewhite","doi":"10.1186/s40462-025-00621-x","DOIUrl":"10.1186/s40462-025-00621-x","url":null,"abstract":"<p><p>BACKGROUND: Hidden Markov models (HMMs) are increasingly used to infer animal behavioural states from GPS tracking data, yet their interpretation often remains uncertain in the absence of empirical validation. Misinterpretation of statistical states as biologically meaningful behaviours can undermine scientific understanding and conservation decisions. Our objective was to evaluate how well HMM-inferred states correspond to directly observed behaviours and to test how the temporal resolution of GPS sampling influences behavioural inference. METHODS: We used GPS collars equipped with video cameras to validate HMM-inferred behavioural states in 81 female migratory caribou (Rangifer tarandus) from two herds. We compared states derived from two- and three-state HMMs to behaviours observed in short collar video clips. To assess the effect of temporal scale, we fit HMMs to GPS data resampled at 20-, 60-, and 120-minute relocation intervals. RESULTS: HMM-inferred behavioural states frequently diverged from video-observed behaviours at the start of observed GPS steps, especially at longer relocation intervals. These mismatches appeared to result from overlapping movement metrics among caribou behaviours (e.g., foraging vs. resting or traveling) and the inability of coarser GPS data to capture behavioural switches occurring at finer temporal scales than the fix rate. Videos of eating were the most misaligned with HMM-inferred states, likely due to high variation in caribou movement while foraging that is often characteristic of mixed-feeding large herbivores. Inferred states for a given location were often inconsistent across temporal scales, indicating that HMM outputs must be interpreted cautiously with respect to the GPS sampling frequency. CONCLUSIONS: The predicted HMM state can differ substantially from true behaviour at the start of each step, in particular at coarse temporal scales. Our results serve as a reminder to interpret HMM states over whole steps rather than at observed positions, validate movement-derived states where possible, and align sampling resolution with species-specific behavioural patterns. </p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12924397/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146044411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The global importance of grasslands underlined by the combination of multiple telemetry tracking techniques of a trans-equatorial loop migrant bird, the European roller (Coracias garrulus).","authors":"Orsolya Kiss, Joanna B Wong, Béla Tokody, Szilárd J Daróczi, Lőrinc Bărbos, András Kelemen","doi":"10.1186/s40462-026-00625-1","DOIUrl":"10.1186/s40462-026-00625-1","url":null,"abstract":"<p><p>Migrant birds encounter different conditions and threats across seasons, so their population dynamics are affected by the events in both breeding and nonbreeding seasons. The decline of long-distance migrant, grassland specialist birds underlines the necessity of integrating the full annual cycle perspective in conservation research. The European roller (Coracias garrulus), as a long-distance migratory grassland bird, is an excellent model species for exploring the environmental parameters that may contribute to the vulnerability of birds with similar requirements through the full annual cycle. Here, we aim to identify the migration strategies and phenology to locate the stopover sites and wintering grounds and to describe the home-range size and habitat composition during the breeding season and the non-breeding season. We studied the breeding population of the Carpathian Basin between 2015 and 2021. We used GPS-UFH loggers to investigate movements during the breeding season and PTT tags and geolocators for tracking during the non-breeding season. For the habitat use analysis, we employed European and global land cover databases. We found that home-range size changed over the breeding season, the availability of grasslands affected the size of the home-range and the core area harboured the largest proportion of grasslands. During the non-breeding period, 108 stopover sites were identified. During autumn, rollers used more stopovers compared to the spring migration. Although rollers migrate on broad fronts during autumn migration, two main stopover regions were identified: a sub-Saharan and a subequatorial. Rollers spent significantly more time at the stopover sites in the sub-Saharan region than in the subequatorial region or during the spring migration. We found multiple migration pathways and a wide east-west spread over the wintering grounds in the southern savanna region. Rollers mainly used grassland habitats, especially on the wintering sites, where rollers spend the longest time during the non-breeding period. Here, we firstly provided a detailed overview of the spatial and temporal scale of rollers’ habitat use through the full annual cycle, proving the global importance of grasslands in the conservation of long-distance migratory birds. In our view such detailed knowledge is crucial for developing conservation strategies applicable to the whole Afro-Palearctic flyway system.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":"9"},"PeriodicalIF":4.0,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12911060/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146042277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FishDiveR: wavelet analyses and machine learning provide robust classification of animal behaviour from time-depth data.","authors":"Calvin S Beale, Jenna L Hounslow, Angela J E Beer, Matias Braccini, Mark V Erdmann, Alastair Harry, Neil R Loneragan, Mark Meekan, Stephen J Newman, David Righton, Ferawati Runtuboy, Michael J Travers, Serena Wright, Adrian C Gleiss","doi":"10.1186/s40462-025-00622-w","DOIUrl":"10.1186/s40462-025-00622-w","url":null,"abstract":"<p><p>Biologging devices have revolutionised our understanding of aquatic animal movement by enabling the collection of detailed depth and temperature time-series. The advent of pop-up satellite archival tags has been particularly impactful, facilitating the collection of tens of thousands of depth time-series (DTS) datasets, with deployment periods ranging from days to years. Datasets from recovered tags are more detailed than those transmitted via satellite, yet both are commonly reported with rudimentary histograms of time-at-temperature and time-at-depth. Such histograms often fail to capture the complex temporal dynamics of vertical movements that are available from the high sampling frequency time-series in recovered tags. This study describes a robust and effective methodological workflow for the quantitative analysis of large DTS datasets collected from archival tags deployed on gill-breathing aquatic animals, utilising continuous wavelet transformation (CWT), Principal Component Analysis (PCA), and k-means clustering. CWT was employed to detect key periodic patterns within the data. Daily wavelet components were calculated across different wavelet periods (e.g., 5-min through 24-h) and reduced via PCA to characterise daily vertical movement behaviour while preserving variance. Finally, unsupervised k-means clustering was used to classify vertical movement behaviours according to their wavelet components and depth summary statistics. This approach efficiently processed large quantities of data, and validation using simulated data demonstrated its robustness and versatility, with assigned behaviour clusters matching the original simulated behaviour types with high consistency (97.7%). For the empirical data, distinct behavioural clusters were identified across a wide range of species, including an oceanic manta ray Mobula birostris, whale shark Rhincodon typus, Atlantic cod Gadus morhua, and largetooth sawfish Pristis pristis. Down sampling of the DTS revealed the workflow to be somewhat insensitive to the sampling frequency of tags, maintaining 83.9% consistency as sampling frequency decreased from one to 15-minutes. These results not only underscore the workflow’s efficacy but also highlight its broad applicability in diverse settings. To facilitate uptake of this approach, an R package FishDiveR, tailored for the implementation of this analytical methodological workflow has been developed.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":"8"},"PeriodicalIF":4.0,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12895817/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Windy weather drives social structure in wild zebra finches.","authors":"Chris Tyson, Hugo Loning, Noëlle Tschirren, Elke Molenaar, Lysanne Snijders, Simon C Griffith, Marc Naguib","doi":"10.1186/s40462-025-00623-9","DOIUrl":"10.1186/s40462-025-00623-9","url":null,"abstract":"<p><p>BACKGROUND: Social connections provide individuals with multiple benefits. Individuals, however, are often constrained in how they socially organize due to ecological and environmental factors that affect individual space-use and movement patterns. Weather is one such factor that influences individual movements, and thus social structure. While on longer time scales (i.e., seasonally) the impacts of weather are relatively predictable, on shorter time scales (i.e., sub-daily), the impacts of weather on social organization are less predictable yet are largely overlooked. METHODS: In this study, we examined the influence of short-term weather components, specifically wind and temperature, on the social structure of free-living zebra finches (Taeniopygia castanotis) in the Australian arid zone. Our goal was to characterize if social network structure was impacted by hourly changes in these important weather components. To do so, we used an automated radio telemetry system to concurrently track 128 wild zebra finches for 12 consecutive days in the Australian spring in order to examine the relationships between weather components and social structure. Using Bayesian network analyses to account for the uncertainty in association strengths among individuals, we examined network structure, as measured by density and modularity, in relation to hourly wind speed, temperature, and time of day. Additionally, to assess if weather impacted the synchronization of group-level movements, we calculated proximity ratios between neighbouring individuals, which we related to wind and temperature. RESULTS: We observed that network modularity increased during hours with higher mean wind speed and was highest in the morning and evening hours. In contrast, network density was not related to wind speed. Additionally, neither modularity nor density showed a significant relationship with temperature during the tracking period, however, this period did not cover a large temperature gradient. Group-level movement patterns as measured by proximity ratios between neighbouring individuals showed no relationship with either wind or temperature. CONCLUSIONS: Our results suggest that changes in wind impact social structure in zebra finches. Given the critical role that network modularity plays in social information transfer, increased wind could have important downstream consequences. Stochastic and more frequent changes in weather due to climate change could thus potentially disproportionately impact species, such as the nomadic zebra finch, that rely on locating ephemeral resources. </p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":"6"},"PeriodicalIF":4.0,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12857109/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Origin of translocated animals is associated with time to settlement and post-translocation survival.","authors":"Seth Harju, Scott Cambrin","doi":"10.1186/s40462-026-00624-2","DOIUrl":"10.1186/s40462-026-00624-2","url":null,"abstract":"<p><p>Translocation of animals is a widespread tool for resolving human-wildlife conflicts and augmenting struggling wild populations. However, expected time to settlement and survival (both measures of translocation success) are often unknown, particularly as a function of the origin of translocatees. We quantified settling times using Bayesian changepoint detection models on the variance in two derived movement metrics for translocated Mojave desert tortoises (Gopherus agassizii) of two different origins: wild adults and adult waifs (i.e. former pets). We compared the annual home range sizes of translocated tortoises with residents, and we also compared survival of each origin group to tagged resident adults. We found that translocated tortoises from different origin groups took an average of 0.5–2.0 years, depending on origin group, to settle based on movement metrics. Waif tortoises took the longest to settle, on average, within 2 years. There was high individual heterogeneity in settling times among tortoises. Home range sizes were larger for translocated wild tortoises than for resident adults only in the year of translocation. Home range sizes of translocated waif females and males were larger than those of residents, but only for the first two years post-translocation. After accounting for a strong year effect, annual survival rates were not different between resident adults (0.91; 90% CI 0.78–0.98) and translocated wild adults (0.90; 0.67–0.99); survival of waif adults was lower than residents, albeit with overlapping confidence intervals, at an annual rate of 0.80 (0.56–0.95) over the 11-year study. We provide results and discussion of using Bayesian models to identify fundamental changes in the variance of distance from release site and directional movement rate (e.g. erratic versus deliberate movements) to determine translocation success. We also provide guidance for managers of Mojave desert tortoise translocation projects and the translocation of animals in general.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":"7"},"PeriodicalIF":4.0,"publicationDate":"2026-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12895592/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145999759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Do GPS collars and coded neckbands tell the same story about year-round movements in geese?","authors":"Mariëlle L van Toor, Christen H Fleming, Niklas Liljebäck, Johan Månsson, Jonas Waldenström, Johan Elmberg","doi":"10.1186/s40462-025-00620-y","DOIUrl":"10.1186/s40462-025-00620-y","url":null,"abstract":"<p><strong>Background: </strong>GPS telemetry has become the norm for the tracking of large-bodied bird species, whereas management and conservation of populations often rely on low-tech methods such as capture-mark-resighting (CMR). Direct evaluations of the comparability of the respective outcome from these methods remain rare despite being crucial for comparative studies and management decisions. Here, we investigated whether GPS tracking and CMR lead to same conclusions about seasonal migration and year-round space use. We chose greylag geese (Anser anser) as a study species, for which a long record of both coded neckband reports and GPS tracking are available, and whose management relies on CMR data.</p><p><strong>Methods: </strong>Our data set was comprised of neckband reports and GPS tracks collected for birds from five capture sites in Sweden (n = 665 neckband birds; n = 156 GPS collar birds). We evaluated the similarity of movement metrics and year-round space use derived from continuous-time movement models and auto-correlated kernel density estimators. We further quantified overlap of spatial range estimates between tracking methods for the breeding period and the wintering season. We approximated spatial observation bias by contrasting range estimates estimated with and without the use of a debiasing algorithm.</p><p><strong>Results: </strong>We found that estimates of space use derived from CMR and GPS tracking were in general agreement: average year-round space use for most individuals was similar even if means among tracking methods differed among all individuals per method (CMR: [Formula: see text]; GPS: [Formula: see text]), and mean overlap of range estimates for summer and winter did not differ depending on whether the comparison was with the same, or differing tracking methods. Movement metrics differed considerably between methods whenever the CMR data captured behaviour at a different temporal scale than GPS (position & velocity autocorrelation), and else in agreement with GPS tracking (periodicity).</p><p><strong>Conclusion: </strong>Our study suggests that the historical and current use of coded neckband data for greylag goose management decisions is appropriate regarding space use of migratory greylag geese in Europe. Understanding whether the existing reporter network can capture changes to the migratory behaviour of greylag geese including short-stopping of migration will however require additional in-depth analyses.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":"3"},"PeriodicalIF":4.0,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12829013/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145960977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}