Movement predictability of individual barn owls facilitates estimation of home range size and survival

Movement Ecology, Journal Year: 2023, Volume and Issue: 11(1)

Published: Feb. 7, 2023

Abstract Background There is growing attention to individuality in movement, its causes and consequences. Similarly other well-established personality traits (e.g., boldness or sociability), conspecifics also differ repeatedly their spatial behaviors, forming behavioral types (“spatial-BTs”). These spatial-BTs are typically described as the difference mean-level among individuals, intra-individual variation (IIV, i.e., predictability) only rarely considered. Furthermore, factors determining predictability ecological consequences for broader space-use patterns largely unknown, part because was mostly tested captivity with repeated assays). Here we test if (i) individuals movement specifically predictability. We then investigate (ii) of this home-range size survival estimates, (iii) that affect individual Methods tracked 92 barn owls ( Tyto alba ) an ATLAS system monitored survival. From these high-resolution (every few seconds) extensive trajectories (115.2 ± 112.1 nights; X̅ SD) calculated indices max-displacement size, respectively). used double-hierarchical generalized linear mix-models assess spatial-BTs, nightly max-displacement, consistency across time. Finally, explored levels were associated survival, well seasonal, geographical, demographic affecting it age, sex, owls’ density). Results Our dataset (with 74 after filtering) revealed clear individualism movement. Individuals differed consistently both mean max-displacement) IIV around (i.e., predictability). More predictable had smaller home-ranges lower rates, on top beyond expected effects spatial-BT (max-displacement), age environments. Juveniles less than adults, but sexes did not Conclusion results demonstrate may act overlooked axis potential implications relevant processes at population level fitness. Considering how mean-effect can facilitate understanding intraspecific diversity, predicting responses changing conditions management.

Language: Английский

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Predator-mediated interactions through changes in predator home range size can lead to local prey exclusion

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2023, Volume and Issue: 290(2004)

Published: Aug. 9, 2023

The strength of indirect biotic interactions is difficult to quantify in the wild and can alter community composition. To investigate whether presence a prey species affects population growth rate another species, we quantified predator-mediated interaction using multi-prey mechanistic model predation matrix model. Models were parametrized behavioural, demographic experimental data from vertebrate that includes arctic fox (

Language: Английский

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Intrinsic traits, social context, and local environment shape home range size and fidelity of sleepy lizards

Ecological Monographs, Journal Year: 2022, Volume and Issue: 92(3)

Published: March 24, 2022

Abstract Home ranges (HRs), the regions within which animals interact with their environment, constitute a fundamental aspect of ecology. HR sizes and locations commonly reflect costs benefits associated diverse social, biotic, abiotic factors. Less is known, however, about how these factors affect intraspecific variation in size or fidelity (the individual's tendency to maintain same location over time) whether features emerge from consistent differences among individuals sites they occupy. To address this knowledge gap, we used an extensive GPS‐tracking data set long‐lived lizard, sleepy lizard ( Tiliqua rugosa ), included repeated observations multiple across years. We tested three categories predictors—(1) characteristics (sex, aggressiveness, parasitic tick counts), (2) environmental (precipitation, food, refuge quality), (3) social conditions (conspecific overlap number neighbors)—affected fidelity. found that differed consistently annual HRs (with repeatability 0.58 0.33, respectively), all predictors affected both For example, were smaller areas more males had larger than females. In addition, aggressive lizards tended have HRs. Conspecific interacted (social network degree) interactive effect on where whose overlapped neighbors HRs, was particularly strong for neighbors. declined time (HR drifted year year), but rate drift. The fact despite drifting suggests individual traits (e.g., habitat choice criteria differ individuals), rather simple heterogeneity sites. Overall, findings demonstrate (1) strong, long‐term, within‐individual consistency between‐individual space use combined effects traits, conditions, animal implications ecological processes.

Language: Английский

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Personality, space use, and networks directly and indirectly explain tick infestation in a wild population of lizards

Ecological Monographs, Journal Year: 2025, Volume and Issue: 95(1)

Published: Jan. 27, 2025

Abstract Host personality can markedly affect parasite transmission. Especially for parasites with indirect transmission through the environment, effects of consistent among‐individual differences in behavior may have both direct and components. For example, mediate how hosts respond to infected individuals likelihood that indirectly interact conspecifics (e.g., by visiting patches previously contaminated). Integrating parasites, personality, these different kinds interaction networks constitutes a key step toward understanding natural systems. We evaluated elements using 5‐year field study wild population sleepy lizards, Tiliqua rugosa , their tick which transmit among lizards lizards' shared use refuges. Using Bayesian models, we (1) predictors lizard infestation probability intensity (i.e., average count when infested) (2) relationships predictors. used latter set models assess between metrics. As predictors, “risk” (derived from time‐lagged refuge sharing network), traits (sex, mass, axes aggression boldness), space (number unique refuges home range overlap other lizards), measures synchronous social interactions edge weight degree). found connections our infestation. boldness was positively directly associated infection via intermediary network risk. more refuges, on hand, negatively (via reduced risk), but probability, indicating potential trade‐off anti‐parasite benefits Our results emphasize multiple aspects host associate infection, components proceed pathways, (3) pathways should be considered together because compounding or counteracting effects.

Language: Английский

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Advancing the Spatiotemporal Dimension of Wildlife–Pollution Interactions

Environmental Science & Technology Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Chemical pollution is one of the fastest-growing agents global change. Numerous pollutants are known to disrupt animal behavior, alter ecological interactions, and shift evolutionary trajectories. Crucially, both chemical individual organisms nonrandomly distributed throughout environment. Despite this fact, current evidence for chemical-induced impacts on wildlife largely stems from tests that restrict organism movement force homogeneous exposures. While such approaches have provided pivotal ecotoxicological insights, they overlook dynamic spatiotemporal interactions shape wildlife-pollution relationships in nature. Indeed, seemingly simple notion animals move environment creates a complex many which never been theoretically modeled or experimentally tested. Here, we conceptualize between variation highlight their implications. We propose three-pronged approach-integrating silico modeling, laboratory experiments allow movement, field-based tracking free-ranging animals-to bridge gap controlled studies real-world Advances telemetry, remote sensing, computational models provide necessary tools quantify these paving way new era ecotoxicology accounts complexity.

Language: Английский

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Resource manipulation reveals interactive phenotype‐dependent foraging in free‐ranging lizards

Journal of Animal Ecology, Journal Year: 2024, Volume and Issue: 93(8), P. 1108 - 1122

Published: June 14, 2024

Abstract Recent evidence suggests that individuals differ in foraging tactics and this variation is often linked to an individual's behavioural type (BT). Yet, while typically comprises a series of search handling steps, empirical investigations have rarely considered BT‐dependent effects across multiple stages the process, particularly natural settings. In our long‐term sleepy lizard ( Tiliqua rugosa ) study system, exhibit consistency boldness (measured as willingness approach novel food item presence threat) aggressiveness response ‘attack’ by conspecific dummy). These BTs are only weakly correlated previously been shown interactive on space use movement, suggesting they could also affect performance, their behaviour for food. To investigate how lizards' process wild, we supplemented 123 patches 120‐ha site with three abundance treatments (high, low no‐food controls). Patches were replenished twice week over species' entire spring activity season feeding behaviours quantified camera traps at these patches. We tracked lizards using GPS determine home range (HR) size repeatedly assayed designated assays. hypothesised bolder would be more efficient foragers aggressive ones less attentive quality found BT effect overall performance. Individuals both bold ate highest number items from array. Further dissection showed general fewest part because visited regularly, discriminated between high low‐quality when revisiting them. Bolder lizards, contrast, tomatoes higher proportion available during visits. Our demonstrates can interact different components leading within‐population success. Given individual differences movement will influence social ecological interactions, results highlight potential role BT's shaping fitness strategies population dynamics.

Language: Английский

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Integrating Personality and Thermal Physiology Traits in a Specialist Liolaemus Lizard: Is There a Syndrome?

Ethology, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

ABSTRACT Physiological mechanisms underlie behavioural responses that have important implications for individual fitness. While personality variation is well established in reptiles, the underlying physiological are less understood. Studies on lizards yielded mixed results regarding relationships between traits and parameters, with syndromes, particularly connection physiology, remaining largely unexplored. We assessed relationship thermal Liolaemus multimaculatus , considering sex as an intervening factor. Exploration boldness were compared familiar novel substrates, we correlations preference locomotor performance. found no repeatability any of studied, contrast to performance which exhibited high repeatability. Our do not support occurrence a syndrome, correlation was exploration. Exploratory behaviour differed substrates sexes, females being more exploratory than males. More explorative individuals, females, enhanced at lower temperatures, revealing inverse within observed thermal‐behavioural type. Intersexual differences lizard can be attributed both ecological pressures mechanisms. Intraspecific syndromes increase species' niche, potentially favouring its adaptability environmental change. Previous studies independently explored pressures. However, comprehensive understanding how these interact influence outcomes remains elusive.

Language: Английский

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Categorizing the geometry of animal diel movement patterns with examples from high-resolution barn owl tracking

Movement Ecology, Journal Year: 2023, Volume and Issue: 11(1)

Published: March 21, 2023

Movement is central to understanding the ecology of animals. The most robustly definable segments an individual's lifetime track are its diel activity routines (DARs). This robustness due fixed start and end points set by a 24-h clock that depends on quotidian schedule. An analysis day-to-day variation in DARs individuals, their comparisons among questions can be asked, particularly context lunar annual cycles, relocation frequency spatial accuracy movement data. Here we present methods for categorizing geometry high (seconds minutes) data.Our method involves initial categorization using data pooled across all individuals. We approached this Ward clustering algorithm employs four scalar "whole-path metrics" trajectory geometry: 1. net displacement (distance between points), 2. maximum from point, 3. diameter, 4. width. illustrate general approach reverse-GPS obtained 44 barn owls, Tyto alba, north-eastern Israel. conducted principle components (PCA) obtain factor, PC1, essentially captures scale movement. then used generalized linear mixed model with PC1 as dependent variable assess effects age sex movement.We clustered 6230 individual into 7 categories representing different shapes owls nightly routines. Five based size elongation were classified closed (i.e. returning same roost), one partially open (returning nearby roost) fully (leaving another region). Our PCA revealed DAR accounted 86.5% existing variation. It also showed PC2 openness 8.4% constructed spatio-temporal distributions types individuals groups aggregated age, sex, seasonal quadrimester, well identify some idiosyncratic behavior within family relation location. Finally, two ways significantly larger young than adults males females.Our study offers new high-frequency classify animal Insights geometric shape populations may prove more invaluable predicting space-use response climate land-use changes other currently analysis.

Language: Английский

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The statistical building blocks of animal movement simulations

Movement Ecology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Sept. 30, 2024

Language: Английский

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Livin' la vida local: philopatry results in consistent patterns of annual space use in a long‐lived lizard

Journal of Zoology, Journal Year: 2023, Volume and Issue: 321(4), P. 309 - 321

Published: Oct. 19, 2023

Abstract For animals exhibiting range residency, the home is a useful framework to quantify space use. Some reptiles can live decades in wild and experience extreme environmental variation that influences patterns of habitat Individuals may modify their use over time, reducing utility single‐year estimates. Very high frequency (VHF) telemetry data were collected for Gila monsters ( Heloderma suspectum ) at three Mojave Desert sites Clark County, Nevada, utilization distributions calculated using an autocorrelated kernel density estimator. Home size was consistent within individuals populations, did not vary across years any site. To measure fidelity (year‐to‐year reuse), we Bhattacharyya's coefficient (BC) each combination which individual tracked averaged estimates populations. The average BC score 0.86 (scale from 0 1; = no overlap 1 complete overlap) among We modeled area accumulation estimate minimum sample needed asymptotic stability found be dynamic variable individuals. Analysis movement by individuals, distance traveled per movement, cumulative active season revealed considerably year. Heterogeneity populations suggests local variation, rather than annual resource availability, drive southern Nevada. Annual variability translate or location, species exhibits extremely philopatry, same areas periods least 3–5 years.

Language: Английский

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