Animal Biotelemetry最新文献

{"title":"Using insertable cardiac monitors to test determinants of heart rate and activity in captive baboons.","authors":"Catherine R Andreadis, Ipek G Kulahci, James Ndung'u, Daisy Kigen, Priscilla Kimiti, Kevin Mugambi Kibe, Noelle R Laske, Janet Mwadime, Nashon Wanjala, Herman Pontzer, Timothy G Laske, Mercy Y Akinyi, Elizabeth A Archie","doi":"10.1186/s40317-026-00485-x","DOIUrl":"10.1186/s40317-026-00485-x","url":null,"abstract":"<p><strong>Background: </strong>Insertable cardiac monitors (ICMs) provide fine-grained, continuous data on cardiac activity. These data have great potential to reveal individual physiology, energetics, and stress responses, with implications for animal health, cognition, welfare, and conservation. However, these devices must be tested for safety, accuracy, and biological validity before being deployed in new species. Here we do so for the Reveal LINQ^™ ICM (Medtronic, Minneapolis, MN USA) over an 8-month period in 10 adult female baboons (<i>Papio anubis</i> and <i>P. cynocephalus</i>) at the Kenya Institute of Primate Research in Kenya. We also report data on heart rate, physical activity, and body temperature in unrestrained, conscious, captive baboons during their normal activities. Finally, we test how heart rate and activity levels are predicted by baboon species, body mass, time of day, ambient temperature, social dominance rank, and ovarian cycle phase.</p><p><strong>Results: </strong>The baboons had no adverse reactions to the Reveal LINQ^™ ICM. Their mean daytime heart rates (HRs) ranged from 89.6 to 128.0 beats per minute (bpm), and their resting HRs ranged from 74.4 to 98.2 bpm. The fastest observed R-wave interval validated by electrocardiogram (ECG) was 230 milliseconds (ms) (260 bpm), and the slowest was 1270 ms (47.4 bpm). In terms of predictors of HR and activity, HR was highly individualized, while activity level was not: baboon identity explained 41% of the variation in HR, but identity only explained 2% of variation in activity levels. HR was positively correlated with physical activity and HR was highest during daylight hours when the baboons were more active. Dominant baboons had higher HRs controlling for activity and were more active than low ranking individuals. In terms of ovarian cycle phase, HR was higher when individuals were in the periovulatory and luteal phases of the ovarian cycle compared to the follicular phase.</p><p><strong>Conclusions: </strong>Our findings support the future use of ICMs to investigate physiological responses in baboons. These devices' safety and validity represent the plausibility of understanding inter-individual and inter-species variation in heart rate and activity in response to variation in the external environment and in individual internal state.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13557771/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148921162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Case report: comparison of NexTrak and VR2 acoustic receiver performance in a low-noise coastal marine environment.","authors":"Wesley R Ogloff, Thomas Stamp, Dale M Webber, Gregory B Skomal, Megan V Winton, Alisa L Newton, G Christopher Fischer, Nigel E Hussey","doi":"10.1186/s40317-026-00451-7","DOIUrl":"10.1186/s40317-026-00451-7","url":null,"abstract":"<p><strong>Background: </strong>Acoustic telemetry is a common methodology in the study of animal movement, behaviour, and physiology in aquatic environments. In the marine environment, receiver performance is limited by environmental conditions and habitat (which modulate receiver detection range) and the number of tagged animals in the system (with signal collisions reducing the receiver's ability to decode unique transmitter IDs). The Innovasea NexTrak receiver was developed to address the key challenges of detection range, number of transmissions successfully decoded, and quality of detection data. To assess how NexTrak receivers perform relative to the commonly used VR2AR receiver, we co-deployed NexTrak and VR2AR receivers on six moorings within a larger acoustic array deployed to study white shark movement ecology in Mahone Bay, Nova Scotia, Canada. We compared receiver performance in terms of (i) number of animals detected, (ii) number of transmissions received, (iii) structure and duration of detection events, and (iv) the effects of environmental noise on detection rates.</p><p><strong>Results: </strong>Results showed 27.7 ± 14.4% more white sharks and 86.0 ± 20.9% more detections for NexTrak relative to VR2AR. At the detection-event level, NexTrak recorded more detections (3.9 ± 3.6, range: 0-19) than VR2AR (2.2 ± 3.0, range: 0-11). Detection events were also longer for NexTrak (471 ± 321 s, range: 0-1549 s) than for VR2AR (324 ± 241 s, range: 0-893 s), equating to a 45% higher detection-event duration as a proxy for increased detection range. While noise was a significant predictor of hourly detections, with each mV increase associated with a ~ 0.4% reduction in detections, there was no discernable difference between NexTrak and VR2AR in their performance relative to noise in our relatively quiet study system.</p><p><strong>Conclusions: </strong>Overall, it is evident that the NexTrak receiver has the potential to improve acoustic telemetry capabilities through enhanced detection efficiency and data quality relative to VR2AR. Improvements in detection range and decoding efficiency have implications for research costs, array design decisions, and the accuracy and precision of continuous movement tracks in fine-scale positioning arrays.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1186/s40317-026-00451-7.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"14 1","pages":"17"},"PeriodicalIF":3.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13230341/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148164757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A call for minimum standards in methodological reporting for studies using animal-borne accelerometers.","authors":"Daire Carroll, Jessica Harvey-Carroll, Jose Luis Crespo-Picazo, Daniel García-Párraga, David March","doi":"10.1186/s40317-026-00506-9","DOIUrl":"10.1186/s40317-026-00506-9","url":null,"abstract":"<p><p>Animal-borne tri-axial accelerometers are increasingly used to investigate animal behaviour and energetics. Critical methodological details, such as device placement and dynamic range, are frequently underreported. This lack of reporting hampers study replicability and interpretation of results. It also complicates comparisons between studies. In addition, as device placement and attachment method can impact animal welfare and survival, transparent reporting should be considered vital for ethical publication. In this comment, we highlight these issues through a review of methodological reporting in studies involving attaching accelerometers to sea turtles. To address these challenges, we propose a framework for minimum standardised reporting that outlines key metadata which researchers should include when publishing studies utilizing animal-borne accelerometers. We also recommend thorough testing of devices and attachment methods prior to their use in the field. Adoption of this framework will enhance transparency, reproducibility, and comparability across studies, while promoting best practices in animal welfare.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at https://doi.org/10.1186/s40317-026-00506-9.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"14 1","pages":"42"},"PeriodicalIF":3.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13675368/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149216969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards a minimum reporting standard to promote animal welfare and data quality in biologging research.","authors":"Allison R Payne, Conner M Hale, Sarah C Davidson, Jessica M Kendall-Bar, Roxanne S Beltran","doi":"10.1186/s40317-025-00438-w","DOIUrl":"10.1186/s40317-025-00438-w","url":null,"abstract":"<p><p>Over the last six decades, the biologging research community has reduced instrument effects on study animals by miniaturizing devices, employing sophisticated release mechanisms, and developing other novel technological advancements. However, biologging devices can still impact animal physiology, behavior, and demography-the very biological metrics the instruments are meant to measure. Recent meta-analyses have emphasized the subjectivity of field-wide \"rules of thumb\" such as the 3% rule, but opportunities to quantify effects more objectively can be expensive or impossible to implement when instrumenting new species. There is therefore a time-sensitive need for systematic reporting of biologging instrument characteristics based on known effects to animal welfare and data quality. We used 202 biologging impact studies from the last thirty years to draw broad, multispecies connections between instrument characteristics and animal physiology, behavior, and/or demography. We build on impact studies that focus on a single species, instrument type, or attachment method to offer solutions applicable across those taxa, technologies, and methodologies. From the literature, we distilled eight best practices for biologging researchers with a particular focus on minimum reporting standards as a low-cost, high-impact way to promote animal welfare and data quality. We propose a preliminary minimum reporting standard, informed by the literature and presented as a machine-readable checklist, that biologging researchers can include with their manuscripts or data submissions to provide data for future meta-analyses. We also present an example of a completed checklist to demonstrate the feasibility of such a standard and a plan for community input and adoption via the International Bio-Logging Society. Robust biologging infrastructure, beginning with a minimum reporting standard informed by the literature on instrument impacts, will facilitate the expansion of biologging across the globe and across disciplines while ensuring animal welfare and improving data quality. As biologging instruments become less expensive and more accessible, researchers, journals, and funders are better positioned than ever to broaden and implement these standards.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1186/s40317-025-00438-w.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"14 1","pages":"1"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12764506/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145907000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The European tracking network through time: united efforts to advance aquatic conservation in Europe.","authors":"Jan Reubens, Kim Aarestrup, David Abecasis, Pedro Afonso, Josep Alós, Eneko Aspillaga, Kim Birnie-Gauvin, David Casals, Peter Desmet, Jena E Edwards, Pieter Huybrechts, Robert J Lennox, Ross McGill, Claudia Meneses, Christopher T Monk, Danielle L Orrell, Lotte Pohl, Marie Prchalova, Inge van der Knaap, Pieterjan Verhelst, David Villegas-Ríos, Stijn Vermaere","doi":"10.1186/s40317-026-00475-z","DOIUrl":"https://doi.org/10.1186/s40317-026-00475-z","url":null,"abstract":"<p><p>Biotelemetry networks have transformed our capacity to study the movements and ecology of aquatic animals, yet their development has been geographically uneven over time. While North America and Australia (among others) already hosted mature, well-coordinated infrastructures in the early 2000s, Europe has long lacked a formal framework for collaboration. The European Tracking Network (ETN) emerged in 2017 as a grassroots response to this gap. Since then, ETN has grown tremendously and has become a sustainable network with a central data system and research infrastructure installed all across Europe, enabling collaborative research on a multitude of species and environments while maintaining a strong track record in capacity building. ETN operates through a decentralised model in which national and regional partners lead infrastructure deployment while contributing data to a shared data platform that adheres to FAIR principles and supports collaborative tools, interactive dashboards and a dedicated R-package. ETN has successfully enabled a growing body of transnational research on species movements, habitat connectivity and behavioural ecology, as well as meta-analyses that maximise data reuse and help reduce animal use. At the same time, ETN faces challenges common to large-scale telemetry initiatives, including the need for stable funding, potential equipment incompatibility, the risk of false-positive detections, a potential lack of community buy-in, and ongoing discussions around data ownership and proper attribution. By working proactively with the community and stakeholders, ETN could address most of these potential challenges through the development of open transmission protocols, by aligning data policies with community needs, and by enhancing stakeholder engagement. Looking ahead, ETN is positioning itself at the interface of digital twins, machine learning, multisensor integration and responsible stewardship. Together, these efforts are transforming ETN into a key component of a global aquatic animal observatory, supporting evidence-based management and conservation across European aquatic ecosystems and beyond.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at https://doi.org/10.1186/s40317-026-00475-z.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"14 1","pages":"37"},"PeriodicalIF":3.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13630809/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149115724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methods for tagging whale sharks: insights into performance and best practices with a focus on clamp attachments.","authors":"Freya C Womersley, Sofia Green, Alberto Garcia-Baciero, Ronan Conlon, Amy L Jeffries, Matt J Waller, Sara S Ratão, Nuno Queiroz, Pedro Afonso, Gonzalo Araujo, Adam Barnett, Christine Barry, Michael L Berumen, Farukhkha Bloch, Ginevra Boldrocchi, Camrin D Braun, Ryan Caillouet, Constance Chapman, Jesse E M Cochran, Rafael de la Parra, Stella Diamant, Alistair D M Dove, Matthew Dunbabin, Mark V Erdmann, Luciana C Ferreira, Richard Fitzpatrick, Jorge Fontes, Adrian C Gleiss, Jonathan R Green, Lucas P Griffin, Curtice R Griffin, Royale S Hardenstine, Abdi Hassan, Alex R Hearn, Jill M Hendon, Mochamad Iqbal Herwata Putra, Eric Hoffmayer, Lisa Hoopes, Robert E Hueter, Sajan John, Jake Levenson, Sonny Lewis, Bruno C L Macena, Mark G Meekan, Ingo B Miller, Brad Norman, Jens Paulsen, Cameron Perry, Simon J Pierce, Samantha D Reynolds, David P Robinson, Christoph A Rohner, Jennifer Schmidt, Edy Setyawan, Abraham B Sianipar, Jamison Smith, Simon R Thorrold, Michele Thums, Rory Wilson, Emily J Southall, David W Sims","doi":"10.1186/s40317-026-00462-4","DOIUrl":"10.1186/s40317-026-00462-4","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Background: &lt;/strong&gt;Biologging and telemetry have transformed our understanding of marine megafauna movement ecology. Yet, methodological constraints continue to limit data quality and deployment duration. Devices recording whale shark (&lt;i&gt;Rhincodon typus&lt;/i&gt;) behaviours and movements have been used for decades, but they remain challenging to deploy and vary in success. Recently, spring-loaded clamp-based systems have emerged as one of the most widely used approaches to attach electronic tags to the fins of this globally endangered species. Currently, however, no consensus guidelines exist as to how to optimise this approach, potentially leading to continued underperforming deployments limiting analysis potential. Here, we synthesise experiences with clamp-based tagging worldwide through a targeted survey of whale shark researchers. We explore performance and challenges with a view to propose current best practices in the field.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;Whale shark researcher responses to the survey highlighted clamp-based systems as a practical and more widely applicable approach than drill-based methods, which are often used to secure tags to other large sharks. They also noted that clamps have greater retention potential and are suitable for a wider range of tags compared to dart-based methods, but are still constrained by design, placement, and deployment conditions. Researchers used a variety of materials and designs to build their own clamps, often facilitated by direct collaboration with each other or key manufacturers. Clamps produced highly variable outcomes, ranging from successful long-term satellite transmissions over 200 days and short-term biologging for 48 h at 20 Hz, to premature detachment and cases of fin damage. For long-term clamps, changes in position on the fin allowed for more stable satellite transmissions over time. Some clamp designs achieved data quantity and quality close to that of drilled deployments, demonstrating their potential to rival traditional methods while offering a less invasive approach. Results emphasised the ongoing need for technological refinement and rigorous evaluation of clamp performance and associated impacts.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;Based on collective insights, we present a unified approach to clamp design and positioning, and identify key priorities for advancing this attachment technology, such as aiming for positions b-2 and c-2 on the fin and ensuring the clamp bridge distance (always between 30 and 50 mm) and tension are matched to shark size. Optimising clamp systems could substantially improve our ability to generate high-quality, long-duration movement data while minimising tagging impacts on the animal where possible. This could enhance ecological and conservation research outcomes for endangered whale sharks, with broader implications for tagging other large-bodied marine megafauna.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Supplementary information: &lt;/strong&gt;The online version con","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"14 1","pages":"22"},"PeriodicalIF":3.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13263205/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148253700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The performance of 76 kHz positional acoustic telemetry is challenged by acoustic conditions in the tailrace of a hydroelectric dam.","authors":"C Ryan Hill, Antóin M O'Sullivan, R Allen Curry, Tommi Linnansaari, Philip M Harrison","doi":"10.1186/s40317-025-00420-6","DOIUrl":"10.1186/s40317-025-00420-6","url":null,"abstract":"<p><strong>Background: </strong>Positional acoustic telemetry permits high-resolution (2D and 3D) tracking of tagged fish based on the speed of sound and time at which acoustic signals are detected at independent receivers. Such positional data has important implications for understanding fish behavior in hydropower tailraces, where movement and fishway passage may be influenced by complex hydraulic conditions. However, environmental features common to these settings-such as rocks, vegetation, bubbles, and suspended particles-can reflect, scatter, or absorb acoustic signals, contributing to spatial and temporal variation in positioning error. Therefore, validating system performance in tailrace environments is important for study design and interpretation. We evaluated the performance of a 76 kHz positional acoustic telemetry system (LOTEK MAP) in the tailrace (0-500 m downstream) of a large (672 MW generating capacity) hydroelectric dam, an environment characterized by reflective surfaces, complex hydraulics, and ambient noise from power generation.</p><p><strong>Methods: </strong>We quantified positional accuracy (<i>i.e.</i>, Euclidean distance from measured deployment positions) and position efficiency (<i>i.e.</i>, position estimates/total transmissions) for six stationary transmitters centered within two hydrophone arrays installed 0-150 m and 200-500 m downstream from the power station. Further, we used generalized linear models to explore how accuracy and position efficiency varied as a function of transmitter location, power station discharge (which represented variation in the acoustic environment at each hydrophone), and the number of receivers that contributed to position estimates.</p><p><strong>Results: </strong>The array nearest the power station (<i>i.e.</i>, 0-150 m downstream) yielded no positional data. Performance improved marginally for the second array (i.e., 200-500 m downstream), but position efficiency was ultimately low (1%), variable across transmitter locations, and negatively correlated with discharge. When position estimates were obtained, positional accuracy was moderate (overall mean = 3 ± 3 m) and increased with the number of contributing receivers, but also varied in direction and magnitude as a function of transmitter location and discharge conditions.</p><p><strong>Conclusions: </strong>Performance of the telemetry system was limited by environmental conditions that influenced signal propagation at complex spatial and temporal scales and would ultimately challenge the interpretation of positional data for free-swimming fish in the tailrace. The telemetry system is likely not suitable for studies that require frequent and reliable positions in hydropower dam tailrace environments.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1186/s40317-025-00420-6.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"13 1","pages":"24"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12287158/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144733737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using accelerometers for tracking loggerhead and green sea turtle behaviour.","authors":"Jessica Harvey-Carroll, Daire Carroll, Jose Luis Crespo-Picazo, Daniel García-Párraga, David March","doi":"10.1186/s40317-025-00415-3","DOIUrl":"10.1186/s40317-025-00415-3","url":null,"abstract":"<p><strong>Background: </strong>Understanding animal behaviour is critical for the design of effective conservation and management strategies. Animal-borne tri-axial accelerometers constitute a type of biologging device which have the potential to provide continuous high-resolution behavioural data. For marine animals, device attachment position may influence both the accuracy of behavioural predictions and the hydrodynamic profile of the animal. We present a case study on the use of accelerometers for the behavioural classification of two sea turtle species in captivity: the loggerhead (<i>Caretta caretta</i>) and green (<i>Chelonia mydas</i>) turtle. Accelerometers were placed on the first and third scute to represent extreme placement scenarios. We trained Random Forest (RF) models to classify behaviour and assessed the impact of placement and sampling frequency on accuracy. In addition, we assessed the impact of device position on carapace drag coefficient using Computational Fluid Dynamics (CFD).</p><p><strong>Results: </strong>We achieved a high accuracy for behavioural classification (0.86 for loggerhead and 0.83 for green turtles). We determined that overall RF accuracy for both species is significantly higher for devices positioned on the third scute compared to the first scute (<i>P</i> < 0.001) and with a smoothing window of 2 s compared to 1 s (<i>P</i> < 0.001). We found no significant effect of sampling frequency and therefore recommend the use of 2 Hz in future work to optimise battery life and device memory. CFD modelling indicated an increase in drag coefficient from a maximum of 0.028 without a device to a maximum of 0.064 with a device for an isolated turtle carapace. Attachment to the first scute significantly (<i>P</i> < 0.001) increased drag coefficient relative to the third scute.</p><p><strong>Conclusions: </strong>Moving forward, the attachment and sampling protocols we present here may be adopted in future studies involving captive sea turtles. Further research is needed to assess their applicability and effectiveness under free-ranging conditions to enable their use in wild populations.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1186/s40317-025-00415-3.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"13 1","pages":"20"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12177017/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144477151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A behavioural approach to key area identification in seabirds for threat mitigation and spatial management.","authors":"Hannah Wood, Emma J Tebbs, Robin Freeman, Mark Bolton, Ian R Cleasby, Francis Daunt, Jonathan A Green, Mark A Newell, Stephen F Newton, Ellie Owen, Alice M Trevail, Catharine Horswill","doi":"10.1186/s40317-025-00427-z","DOIUrl":"10.1186/s40317-025-00427-z","url":null,"abstract":"<p><strong>Background: </strong>Identifying key areas of animal distribution using individual movement data is fundamental for conservation planning, threat mitigation, and spatial management. Methodologies which define these areas based on measures of high density and abundance may overlook spatial heterogeneity in behaviour-specific distributions. This is particularly relevant for behaviours that occur at lower densities but are associated with increased exposure to specific environmental threats. We used a dataset of 566 GPS tracked individuals and 14 colonies of a vulnerable species of seabird, the black-legged kittiwake (<i>Rissa tridactyla</i>), to compare two methods for delineating key areas. The first method applies kernel density estimates, based on 50% ('core area') utilisation distributions, to all movement data during an at-sea trip. This reflects a widely used density-based approach to identify high-use spatial areas. The second method incorporates hidden Markov modelling to classify movement data into three dominant behaviour states: resting, foraging, and transiting, to identify behaviour-specific high-use areas. We then compare population-level estimates of key areas based on each method using the BirdLife International Key Biodiversity Area framework. We also explore how the selection of an intermediate (70%) and home range (95%) utilisation distribution influences the capture of different behaviours.</p><p><strong>Results: </strong>We found that individual-level kernel density estimates based on core areas of all movement data fail to adequately capture the core distribution of transiting, a widespread and dispersed behaviour. Moreover, population-level estimates of key areas derived from transiting behaviour are significantly larger than those identified using all tracking data, suggesting that conventional methods likely underestimate exposure to threats encountered during transit. Conversely, key areas for resting and foraging behaviour are more spatially constrained than those derived from all movement data, implying that behaviour-specific analyses may improve the precision of conservation planning. Both individual and population-level key area estimates based on larger utilisation distributions (i.e. 75% and 95%) better capture the distribution of transiting behaviour as these larger distributions probabilistically encompass a greater fraction of observed movement trajectories.</p><p><strong>Conclusion: </strong>These results highlight the importance of labelling movement data by behavioural state to enhance the utility of GPS data for conservation applications. By incorporating behavioural state differentiation into spatial analyses, threat exposure assessments can be refined to focus conservation resources more effectively. Furthermore, this approach has direct implications for environmental impact assessments, particularly in the context of expanding marine industries such as offshore renewable energy developments.</p>","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"13 1","pages":"34"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12576929/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145432429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maximising the value of transmitted data from PSATs tracking marine fish: a case study on Atlantic bluefin tuna","authors":"Thomas W Horton, Samantha Birch, Barbara A. Block, Lucy A. Hawkes, Jeroen Kooij, Matthew J. Witt, David Righton","doi":"10.1186/s40317-023-00356-9","DOIUrl":"https://doi.org/10.1186/s40317-023-00356-9","url":null,"abstract":"","PeriodicalId":37711,"journal":{"name":"Animal Biotelemetry","volume":"18 4","pages":"1-21"},"PeriodicalIF":2.7,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139380904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}