Movement Ecology最新文献

{"title":"Radio telemetry of butterflies: practical insights and critical tag-weight thresholds.","authors":"Simon Heitzler, Sara Dallmöller, Heiko Hinneberg, Luis Ricardo Murillo-Hiller, Thomas K Gottschalk","doi":"10.1186/s40462-025-00615-9","DOIUrl":"10.1186/s40462-025-00615-9","url":null,"abstract":"<p><strong>Background: </strong>Radio telemetry offers new opportunities for studying the movement of insects. One important prerequisite for using radio tags to study butterfly movement ecology is that tag weight and attachment do not significantly affect butterfly flight performance. Despite recent applications of telemetry in butterflies, a systematic evaluation of tag-to-body-weight thresholds for successful tagging has been lacking.</p><p><strong>Methods: </strong>We tested ultra-light radio tags (0.13 g) on 117 individuals of 18 butterfly species under greenhouse and field conditions. Tag-to-body-weight ratios ranged from 5.6% to 77.8%. We used generalized linear mixed-effects models to identify predictors of flight success and used ROC analysis to determine the critical tag-to-body-weight threshold. Tag retention was also compared between thoracic and abdominal attachment sites.</p><p><strong>Results: </strong>We found that a threshold of approximately 20% of body weight marks a critical point beyond which flight performance declines significantly. Abdominal tag attachment proved more reliable and stable than thoracic attachment, with lower detachment rates.</p><p><strong>Conclusions: </strong>This study presents the first comprehensive evaluation of tag-to-body-weight thresholds and attachment methods in butterfly telemetry. The results provide practical guidance for planning radio telemetry studies of butterflies and for conducting further methodological research, such as into the effects of tagging on butterfly behavior, body condition, survival, and reproduction.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"86"},"PeriodicalIF":3.9,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12690926/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145715634","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":"A simple method for rapid reconstruction of 3D animal trajectory from monocular video.","authors":"Weihao Qi, Kangkang Zhang, Jiqian Li, Jianan Ding, Nina Ma, Weiyi Lin, Xinwen Xu, Ru Wang, Zhuomin Niu, Aiqing Lin, Jiang Feng, Ying Liu","doi":"10.1186/s40462-025-00608-8","DOIUrl":"10.1186/s40462-025-00608-8","url":null,"abstract":"<p><strong>Background: </strong>Quantification of locomotion is central to the study of animal movement ecology. Although technological advances have enabled researchers to acquire high-resolution kinematic data, the associated methods often require multiple cameras and complicate the analysis process. Quantifying complex animal locomotion in three-dimensional space lacks an accurate, user-friendly method.</p><p><strong>Methods: </strong>By combining deep learning tools and the pinhole camera model, we develop a novel method for reconstructing three-dimensional animal motion trajectories from monocular videos and analyzing kinematic data. We tested spatial precision and occlusion robustness in both aerial-based and ground-based scenarios. Subsequently, the method was applied to a bat-predation biomechanics study to demonstrate its capabilities. The application is based on low-cost single camera and does not require multiple devices or precise calibration.</p><p><strong>Results: </strong>Our method rapidly reconstructs 3D trajectories for various animal movements, including flight, walking, and preying. The estimated 3D coordinates have an average bias of 0.09 m for aerial motion and 0.044 m for ground motion. Moreover, our method is extremely robust in distance estimation when faced with foreground occlusion. We extracted kinematic parameters from the 3D trajectory and gait frequencies from pixel area changes. Applying these parameters to biomechanical analysis, the results show that the obtained parameters can accurately describe the animal's movement.</p><p><strong>Conclusions: </strong>This lightweight and cost-effective approach allows the analysis of animal locomotion in the natural environment. It also allows researchers to flexibly adapt it to their specific needs, facilitating intelligent monitoring of the wild animals and enhancing the understanding of their locomotion data.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"85"},"PeriodicalIF":3.9,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12659078/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145642759","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":"Balancing opposing cues: seasonal shifts in push-pull drivers of migration in a temperate waterfowl species.","authors":"Nicholas W Bakner, Nicholas M Masto, Cory J Highway, Allison C Keever, Lydia P Holmes, Nathan J Steelman, Heath M Hagy, Jamie C Feddersen, Aaron R Pierce, Bradley S Cohen","doi":"10.1186/s40462-025-00605-x","DOIUrl":"10.1186/s40462-025-00605-x","url":null,"abstract":"<p><p>BACKGROUND: Migration in birds results from a complex interplay of internal and environmental cues that shift across seasons. A push–pull framework conceptualizes migration as driven by external “push” cues, such as deteriorating weather, and internal “pull” cues associated with photoperiod and reproductive readiness. Understanding how these cues interact seasonally can inform predictions about migratory behavior under changing climatic conditions. METHODS: We applied the push–pull framework to assess drivers of seasonal migration in mallards (Anas platyrhynchos), a behaviorally plastic waterfowl species. We analyzed GPS data from 414 individuals tracked across the Mississippi Flyway from 2019 to 2024. Monthly migration direction and distance were modeled as functions of minimum temperature, wind direction, barometric pressure change, and photoperiod. We examined how cue influence varied between autumn and spring migration periods. RESULTS: By December 31, ~92% of southward migrations had occurred, with ~50% completed by mid-November. Autumn migration was primarily influenced by environmental push cues—declining temperatures, favorable wind direction, and falling barometric pressure all increased the likelihood and distance of migration. Migration distances peaked in November and December, when these push conditions were strongest. In contrast, spring migration was driven more by internal pull cues. Northward movements initiated in January and intensified through April, with photoperiod overriding weather as the primary driver. Weather still affected migration distances, e.g. warmer minimum temperatures in February increased distances by 62%, while strong north winds in March reduced movement by up to 213%. Barometric pressure had opposing effects by season: falling pressure promoted movement in autumn but inconsistently influenced spring migration. CONCLUSIONS: Our findings reveal a seasonal shift in the relative influence of environmental and internal cues on mallard migration. Weather exerts stronger influence during autumn, whereas photoperiod dominates in spring. These results highlight the utility of a push–pull framework for understanding migratory behavior and suggest that climate change may disproportionately disrupt the reliability of migration cues across seasons. </p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":" ","pages":"91"},"PeriodicalIF":4.0,"publicationDate":"2025-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12751336/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145582803","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":"Allied male dolphins use synchronous displays to strengthen social bonds in a cooperative context.","authors":"Sam Hill-Cousins, Emma Chereskin, Simon J Allen, Richard C Connor, Michael Krützen, Danai Papageorgiou, Stephanie L King","doi":"10.1186/s40462-025-00603-z","DOIUrl":"10.1186/s40462-025-00603-z","url":null,"abstract":"<p><p>From fireflies to fiddler crabs and anurans to apes, males from across the animal kingdom perform synchronous displays in the mating context. Most do so in competition for mates, but few species synchronise signal production cooperatively. For example, synchrony in humans is cooperative; where interpersonal synchrony increases affiliation, cooperative ability, and group cohesion. Interestingly, multi-level alliances of male Indo-Pacific bottlenose dolphins in Shark Bay, Western Australia, also engage in cooperative synchrony. Adult males form pairs or trios to cooperatively herd single oestrus females, during which males perform elaborate synchronous displays. These displays comprise synchronous turns, leaps, and surfacing bouts around the female, but the function remains equivocal. Here, we used drone mounted video coupled with 40 years of behavioural data to investigate what social factors influence the performance of these synchronous displays by male dolphins. We found that males perform synchronous displays for longer after engaging in affiliative contact behaviour, and that those with weaker social bonds engaged in more precise synchrony with each other. Aligning with recent research on vocal synchrony in this population, we provide evidence that male dolphins use synchrony to both maintain and strengthen their social bonds. These findings suggest that dolphins have converged with humans on the use of synchronous displays to sustain multiple social bonds in nested, complex social systems.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"84"},"PeriodicalIF":4.0,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12636197/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145574948","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":"Variability in foraging ranges of snow petrels and implications for breeding distribution and use of stomach-oil deposits as proxies for paleoclimate.","authors":"Ewan D Wakefield, Erin L McClymont, Sébastien Descamps, W James Grecian, A Rus Hoelzel, Eleanor M Honan, Anna S Rix, Henri Robert, Vegard Sandøy Bråthen, Richard A Phillips","doi":"10.1186/s40462-025-00609-7","DOIUrl":"10.1186/s40462-025-00609-7","url":null,"abstract":"<p><strong>Background: </strong>Pelagic seabirds forage over vast areas, and their movements and diet provide valuable insights into environmental conditions that are otherwise difficult to observe. Snow petrels Pagodroma nivea forage largely on sea-ice-associated prey, rendering the energy-rich lipids into stomach oil, some of which is spat defensively at nest sites where it accumulates over tens of millennia. These deposits contain chemical signatures of the foraging environment, providing a unique biological archive of sea-ice conditions in the pre-satellite era. Accurate interpretation of these proxies, however, requires detailed knowledge of foraging ranges-how far the petrels travel, the habitats they target, and how these behaviours vary with season, colony location, and sex.</p><p><strong>Methods: </strong>To estimate foraging ranges at three colonies located 180-200 km inland in Dronning Maud Land, we tracked 94 snow petrels (34 with light-based geolocators and 60 with GPS loggers). We tested whether foraging latitude is associated with the latitude of the ice edge, estimated via satellite remote sensing. We then projected potential foraging ranges for all known colonies in the study area to reexamine assumptions made in paleoclimate studies.</p><p><strong>Results: </strong>During most breeding stages, and across breeding seasons, core foraging areas were centred approximately 2° south of the outer sea-ice edge and tracked this habitat as it receded during the spring melt. Female snow petrels were approximately 7% lighter than males but foraged at similar distances and in similar areas. Foraging ranges differed little between colonies but substantially between breeding stages. For example, average median range was ~1400 km (95% CI 1340-1470 km) during the pre-laying exodus vs. ~530 (430-660) km during brood-guard.</p><p><strong>Conclusions: </strong>Snow petrel stomach-oil deposits potentially integrate environmental conditions over greater and more seasonally variable areas than previously assumed, probably with a bias towards conditions in the marginal ice zone (outer pack ice) during the early summer when stomach oil deposition due to nest competition is likely greatest. Our results are consistent with the hypothesis that snow petrel breeding range in the western Weddell Sea is limited by access to foraging habitat, such as coastal polynyas. Although tracking data from other colonies would be useful to confirm the generality of our foraging range estimates, we hypothesise that as sea ice fluctuated over previous glacial-interglacial cycles, this regulated breeding distribution across the region.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"83"},"PeriodicalIF":3.9,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12636188/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145565529","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":"Habitat fidelity of adult grey seals over multiple years in a changing marine ecosystem.","authors":"Benia V R Nowak, W Don Bowen, Damian C Lidgard, Cornelia E den Heyer","doi":"10.1186/s40462-025-00607-9","DOIUrl":"10.1186/s40462-025-00607-9","url":null,"abstract":"<p><strong>Background: </strong>Individual foraging site fidelity is a common mechanism for dealing with environmental variability across marine predator species. However, there has been little research on long-term individual repeatability to date, especially over time periods where significant environmental and ecological change has occurred. The grey seal is a long-lived pinniped species that forages on the Scotian Shelf and in the Gulf of St. Lawrence, two ecosystems which are characterized by spatio-temporal variability in oceanographic conditions and have also undergone dramatic changes to ecological structuring and functioning in recent decades.</p><p><strong>Methods: </strong>Between 1995 and 2018, 22 adult grey seals (17 females, 5 males) were repeatedly instrumented with tracking devices in two or three different years. We fitted continuous-time correlated random walk state-space models to estimate grey seal locations and move persistence along tracks. We then calculated the kernel utilization distribution overlap for home ranges (99%) and core areas (50%) within and between individuals as well as for areas (95%) associated with apparent foraging behaviour (move persistence < 0.5).</p><p><strong>Results: </strong>Here, we show that grey seals demonstrated long-term moderate to high levels of fidelity in home ranges between years. By contrast, there was little between-year overlap in core areas used. Nevertheless, areas associated with low move persistence, inferred as area-restricted search and hence where foraging maybe more likely, were highly consistent between years. Habitat overlap between individuals was low across years.</p><p><strong>Conclusions: </strong>Home range fidelity appears to persist over the life of grey seals, despite significant environmental and ecological change occurring within their habitat during our study period. These findings contribute to understanding the potential consequences of projected environmental change for this and other central place foraging species.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"82"},"PeriodicalIF":3.9,"publicationDate":"2025-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12616985/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145514978","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":"Northern populations of Finnish raccoon dogs are active at the range edge and unhindered by movement boundaries.","authors":"Purabi Deshpande, Pyry Toivonen, Vesa Selonen","doi":"10.1186/s40462-025-00601-1","DOIUrl":"10.1186/s40462-025-00601-1","url":null,"abstract":"<p><p>Studying movements of invasive species is important for controlling their spread into new areas and understanding how their populations can be controlled in the regions where they have already spread. Additionally, animals at the range edge are known to behave differently from those at the range core. Such differences in movement behaviour can further affect the spread of a species into new areas. Here, we use data from GPS tracking of 103 individuals of the invasive raccoon dog (Nyctereutes procyonoides) in Finland to examine the movement of the species. First, we determine whether movement distances differ in the range edge and range core. Next, focusing on dispersing individuals, we explore whether their movements are directional. Finally, we investigate whether the dispersal by raccoon dogs is affected by movement boundaries, such as waterbodies and roads. We show that raccoon dogs at the range edge move larger distances than those in the range core. The dispersing individuals do not show a preference to moving in any particular direction. Finally, we do not find evidence for waterbodies and roads acting as movement boundaries for raccoon dogs. Our results indicate that raccoon dogs are very active at the range edge and highlight how the movement distances of a species might be underestimated if individuals from the invasion front are not studied. The raccoon dog’s spread is likely to continue into favourable habitats and not be hindered by roads or water bodies putting areas at higher latitudes and surrounding countries at the risk of invasion.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"81"},"PeriodicalIF":4.0,"publicationDate":"2025-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12606842/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145497556","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":"Should I stay or should I go? Causes and consequences of intraspecific variation in site fidelity.","authors":"Katey S Huggler, Rachel A Smiley, Brittany L Wagler, Alyson B Courtemanch, Zach Gregory, Kevin L Monteith, Lisa A Shipley, Cheyenne Stewart, Paul Wik, E Frances Cassirer, Ryan A Long","doi":"10.1186/s40462-025-00606-w","DOIUrl":"10.1186/s40462-025-00606-w","url":null,"abstract":"<p><strong>Background: </strong>Site fidelity, the tendency to return to previously visited locations, is common across a wide range of taxa and ecosystems. Site fidelity can benefit animals by improving foraging efficiency, reducing movement costs, and increasing reproductive success. Nevertheless, considerable variation exists within and among species in the nature and magnitude of site fidelity, and the mechanisms underpinning this variation are poorly understood. One hypothesis for explaining variation in site fidelity suggests that in predictable resource landscapes, fidelity should be conditional on prior reproductive success (win-stay, lose-switch). Alternatively, animals occupying less predictable resource landscapes should make greater use of cues from their current environment and site fidelity should scale inversely with the magnitude of environmental heterogeneity.</p><p><strong>Methods: </strong>We investigated the causes (e.g., prior reproductive success, foodscape heterogeneity) and consequences (e.g., nutritional condition, neonate survival) of intraspecific variation in site fidelity during spring and summer among three bighorn sheep (Ovis canadensis) populations occupying a low-elevation grassland and two alpine ecosystems. We used distance-based metrics to quantify site fidelity at inter-annual, inter-month and inter-week scales to better understand the behavioral strategies employed by bighorn sheep to mitigate environmental variation and optimize foraging opportunities.</p><p><strong>Results: </strong>Site fidelity varied considerably among study areas and across temporal scales. Prior reproductive success was not an important predictor of site fidelity by bighorn sheep, and instead, site fidelity appeared to be influenced by quality and predictability of forage resources within individual home ranges. Despite consistency of this effect, however, we found little evidence that site fidelity improved nutritional condition of female sheep or neonate survival to 120 days.</p><p><strong>Conclusions: </strong>Our results generally support the notion that environmental conditions shaped the strength of site fidelity across temporal scales. Yet, the benefits of site fidelity were limited, at least based on the performance metrics we measured. Continuing to parse the complex mechanisms underpinning variation in site fidelity will shed important light on the capacity of animals to adjust to an unpredictable and changing environment.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"80"},"PeriodicalIF":3.9,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12590834/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145460393","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":"A ERSF-VIPA framework: scalable wildlife movement modelling for conflict mitigation.","authors":"Xiaoyi Chen, Jie Li, Xinyu Cao, Yin Yang, Colin A Chapman, Xiao Li, Ruijing Qiao, Xiaohuan Wang, Feiling Yang, Dejun Kong","doi":"10.1186/s40462-025-00602-0","DOIUrl":"10.1186/s40462-025-00602-0","url":null,"abstract":"<p><p>1. Effective conservation planning and conflict mitigation can hinge on accurately modelling wildlife movement paths (WMPs), yet progress is hindered by both a shortage of reliable methods and limited data. The critical challenge, therefore, is to devise limited-data models that faithfully reproduce elusive species' movements and deliver actionable insights for human-wildlife conflict management. 2. We introduce the Enhanced Resource Selection Function-Vector-network Iterative Pathfinding Algorithm (ERSF-VIPA), a novel framework for simulating WMPs with limited data. Drawing on historical occurrence records of Asian elephants (Elephas maximus), we assume individuals make rational, goal-driven decisions based on local environmental knowledge. The ERSF employs a random forest on a hexagonal grid to estimate nonlinear resource-selection probabilities, while VIPA conducts an iterative, node-to-node search across that hexagonal vector network-scoring each candidate by combining selection probability with cubic distance coefficients to ensure ecological validity and energetic efficiency. 3. The model demonstrates high accuracy, with 90.3% of the 68 simulated paths approximating the observed paths with an average maximum deviation of 418 m. These findings underscore the model's robustness and its capacity to translate limited tracking data into actionable insights for conservation. 4. ERSF-VIPA operates using only coarse, non-continuous historical data that lack precise timestamps or spatial accuracy. By operating with minimal data requirements, ERSF-VIPA demonstrates exceptional extensibility and broad applicability for reconstructing movement paths of elusive wildlife species. Its proven accuracy in simulating Asian elephant paths further positions it as a potentially powerful decision-support framework for real-time animal monitoring and proactive human-wildlife conflict mitigation.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"78"},"PeriodicalIF":3.9,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12574237/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145402814","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":"Movement patterns and habitat selection of Lahontan cutthroat trout during streamflow recession in a Great Basin stream.","authors":"Keane Flynn, Suzanne Rhoades, Gabriel Rossi, Zachary Bess, James Simmons, Adam Csank, Zeb Hogan, Sudeep Chandra","doi":"10.1186/s40462-025-00597-8","DOIUrl":"10.1186/s40462-025-00597-8","url":null,"abstract":"<p><strong>Background: </strong>Understanding the movement of organisms is critical for species conservation in the context of changing landscapes and climate. As climatic extremes impact the United States Great Basin, quantifying the movements of native fishes like Lahontan cutthroat trout (Oncorhynchus clarkii henshawi) is vital for facilitating their persistence. These climatic extremes are projected to alter flow regimes, specifically, reducing hydrologic connectivity needed to maintain populations. By studying fish movement patterns during streamflow recession and baseflow conditions, we can identify the factors responsible for movement and habitat selection to better manage these factors in a changing world.</p><p><strong>Methods: </strong>We radio tagged 57 stream-resident Lahontan cutthroat trout from early summer to fall in 2021 and 2022 in the Summit Lake watershed (NV, USA). The location of each fish was associated with local hydraulic, physical habitat, invertebrate drift concentration, and water quality data to assess which factors impact habitat selection, abandonment, and overall movement. Linear mixed effects models were used to assess which factors were associated with trout movement. Density estimates from electrofishing were used as a proxy to assess habitat selection using multiple linear regression modeling.</p><p><strong>Results: </strong>Stream-resident trout displayed little movement during streamflow recession and baseflow conditions, with median daily movements of 0.3 m/day and a median home range of 10.2 m; these results suggest even less movement than those reported in previous studies. Declines in riffle crest thalweg (RCT) depth were the primary factor associated with increases in distance traveled, yet there were only four observed movements below RCT depths of 5 cm and no observations below 4 cm. Woody debris, mean maximum stream depth, and availability of mid-channel pool habitat were the strongest predictors of habitat selection.</p><p><strong>Conclusions: </strong>The findings from this study suggest that stream-resident trout movement occurs when absolutely necessary, such as escaping drying reaches or avoiding risk of predation in shallow water. We suggest that watershed managers implement low-flow hydrologic monitoring to identify vulnerable stream reaches, with an emphasis on preserving streamflow connectivity for stream-rearing salmonids. Additionally, this emphasizes the importance of tracking movements for species of interest as a strategy to identify factors potentially reducing population fitness.</p>","PeriodicalId":54288,"journal":{"name":"Movement Ecology","volume":"13 1","pages":"79"},"PeriodicalIF":3.9,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12574100/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145410776","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}