Sonification of Animal Tracks as an Alternative Representation of Multi-Dimensional Data: A Northern Elephant Seal Example

Duarte, Carlos M.; Riker, Paul; Srinivasan, Madhusudhanan; Robinson, Patrick W.; Gallo‐Reynoso, Juan Pablo; Costa, Daniel P.

doi:10.3389/fmars.2018.00128

Cited by 4 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, samples size in the hundreds can reveal correlated or coordinated movement patterns among individuals. An example is the coherent movement patterns suggested by the sonification of movement (i.e., the generation of sound based on the movement patterns in the tracking data) of over 300 northern elephant seals tagged over~10 yr in the Northeast Pacific Ocean (Duarte et al 2018). These studies show that the use of techniques that can deal with big data (Leek et al 2017) might bring new insights to movement ecology.…”

Section: Moving Toward Big Data Analysis (Very Large Sample Sizes; ≫100)mentioning

confidence: 99%

“…(2) assess shifts in space use with time, among subpopulations or with gender, age class, and period (e.g., breeding cycles); (3) estimate susceptibility to interactions with human activities; (4) allow multispecies assessments at large spatial scales assessed the levels of foraging area overlap for Northern Gannets from different breeding areas (Wakefield et al 2013) revealed that oceanic shark hotspots may be at risk from overfishing (Queiroz et al 2016) used to define areas of high susceptibility for fisheries by-catch at the scale of the Atlantic Ocean based on 106 tracks (Fossette et al 2014) led to a better understanding of how seals use the circumpolar habitat in the Southern Ocean based on 287 seals (Hindell et al 2016); allowed application of big data approaches to show memory as an intrinsic driver of movement for southern elephant seals (Rodriguez et al 2017); reveal correlated or coordinated movements from a 10-yr movement data set of northern elephant seals suggested through sonification (Duarte et al 2018) revealed areas of particular ecological significance for multiple species (Raymond et al 2015); showed high variability in the distribution of cumulative impacts across multiple species (Maxwell et al 2013); highlighted hotspots, migration pathways, and niche partitioning among multiple species in the Pacific Ocean (Block et al 2011); showed that movement patterns in marine animals are strongly conserved across species regardless of evolutionary history (Sequeira et al 2018) increases, both in relation to the number of individuals tracked and the length of individual tracks, there is improved ability to resolve a range of questions associated with movement, such as home-range estimates, migration patterns including identification of high-use corridors, migration distance and variability in destinations, and foraging search patterns. How large a sample size is needed to resolve these various movement components to a certain level of confidence will depend on the extent of individual variability and on the behavior of the species being tracked.…”

Section: )mentioning

confidence: 99%

See 1 more Smart Citation

The importance of sample size in marine megafauna tagging studies

Sequeira

Heupel

Lea

et al. 2019

Ecological Applications

View full text Add to dashboard Cite

Telemetry is a key, widely used tool to understand marine megafauna distribution, habitat use, behavior, and physiology; however, a critical question remains: “How many animals should be tracked to acquire meaningful data sets?” This question has wide‐ranging implications including considerations of statistical power, animal ethics, logistics, and cost. While power analyses can inform sample sizes needed for statistical significance, they require some initial data inputs that are often unavailable. To inform the planning of telemetry and biologging studies of marine megafauna where few or no data are available or where resources are limited, we reviewed the types of information that have been obtained in previously published studies using different sample sizes. We considered sample sizes from one to >100 individuals and synthesized empirical findings, detailing the information that can be gathered with increasing sample sizes. We complement this review with simulations, using real data, to show the impact of sample size when trying to address various research questions in movement ecology of marine megafauna. We also highlight the value of collaborative, synthetic studies to enhance sample sizes and broaden the range, scale, and scope of questions that can be answered.

show abstract

Section: Moving Toward Big Data Analysis (Very Large Sample Sizes; ≫100)mentioning

confidence: 99%

Section: )mentioning

confidence: 99%

The importance of sample size in marine megafauna tagging studies

Sequeira

Heupel

Lea

et al. 2019

Ecological Applications

View full text Add to dashboard Cite

show abstract

Metrics for describing dyadic movement: a review

et al. 2018

View full text Add to dashboard Cite

In movement ecology, the few works that have taken collective behaviour into account are data-driven and rely on simplistic theoretical assumptions, relying in metrics that may or may not be measuring what is intended. In the present paper, we focus on pairwise joint-movement behaviour, where individuals move together during at least a segment of their path. We investigate the adequacy of twelve metrics introduced in previous works for assessing joint movement by analysing their theoretical properties and confronting them with contrasting case scenarios. Two criteria are taken into account for review of those metrics: 1) practical use, and 2) dependence on parameters and underlying assumptions. When analysing the similarities between the metrics as defined, we show how some of them can be expressed using general mathematical forms. In addition, we evaluate the ability of each metric to assess specific aspects of joint-movement behaviour: proximity (closeness in space-time) and coordination (synchrony) in direction and speed. We found that some metrics are better suited to assess proximity and others are more sensitive to coordination. To help readers choose metrics, we elaborate a graphical representation of the metrics in the coordination and proximity space based on our results, and give a few examples of proximity and coordination focus in different movement studies.Electronic supplementary materialThe online version of this article (10.1186/s40462-018-0144-2) contains supplementary material, which is available to authorized users.

show abstract

Coherent movement patterns of female northern elephant seals across the NE Pacific Ocean

Pei,

Zhang,

Eguíluz

et al. 2023

Front. Mar. Sci.

View full text Add to dashboard Cite

Northern elephant seals engage in large-scale foraging migrations traveling up to 15,000 Km over 8 months in the northeast Pacific. While traditionally considered solitary migrants, we demonstrate here that female seals migrate in a surprisingly coherent manner, for individual northern elephant seals traveling in over such a large region of the ocean. Animal movement remained coherent, in terms of the direction of individual swimming relative to group movement, throughout much of their migrations. Movement coherence remained well above the value expected if the movement was independent until the migrating seals were further than 1,000 Km from the colony, beyond which movement coherence declined. Migrating seals presented regional aggregations consisting of female seals traveling within the center of the aggregation, closely following the main migration pathway, with individuals isolated on the extremes of the aggregation. These formations were preserved in the out-and-return migration trips. Animals at the edges of the group show an absence of correlation in their movement with the rest of animals. The observed movements exhibited a lag in the group movement patterns that was greater for female animals > 1,000 Km apart. A model that reproduced movement based on the average individual movement properties failed to reproduce the observed movement patterns. In turn, when a parameter was introduced that reflected group behavior, the resulting modelled movement conformed to the observed patterns, thereby demonstrating the presence of coherent, or synchronized, movement. Whereas the duration of female migration is ultimately constrained by reproductive biology, the coherent movement may involve both endogenous and exogenous cues determining the timing of the initiation of return across 25 million Km2 in the northeast Pacific.

show abstract

Sonification of Animal Tracks as an Alternative Representation of Multi-Dimensional Data: A Northern Elephant Seal Example

Cited by 4 publications

References 25 publications

The importance of sample size in marine megafauna tagging studies

The importance of sample size in marine megafauna tagging studies

Metrics for describing dyadic movement: a review

Coherent movement patterns of female northern elephant seals across the NE Pacific Ocean

Contact Info

Product

Resources

About