The importance of sample size in marine megafauna tagging studies
Ana M. M. Sequeira,Michelle R. Heupel,Mary-Anne Lea,Víctor M. Eguíluz,Carlos M. Duarte,Mark G. Meekan,Michele Thums,Hannah J. Calich,Ruth H. Carmichael,Daniel P. Costa,Luciana C. Ferreira,Juan Fernández-Gracia,Robert Harcourt,Autumn-Lynn Harrison,Ian D. Jonsen,Clive R. McMahon,David W. Sims,David W. Sims,Rory P. Wilson,Graeme C. Hays +19 more
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TLDR
This work reviewed the types of information that have been obtained in previously published studies using different sample sizes, considered sample sizes from one to more than 100 individuals and synthesized empirical findings, detailing the information that can be gathered with increasing sample sizes.Abstract:
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.read more
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Overhauling Ocean Spatial Planning to Improve Marine Megafauna Conservation
Ana M. M. Sequeira,Graeme C. Hays,David W. Sims,Víctor M. Eguíluz,Jorge P. Rodríguez,Michelle R. Heupel,Robert Harcourt,Hannah J. Calich,Nuno Queiroz,Nuno Queiroz,Daniel P. Costa,Juan Fernández-Gracia,Luciana C. Ferreira,Simon D. Goldsworthy,Mark A. Hindell,Mary-Anne Lea,Mary-Anne Lea,Mark G. Meekan,Anthony M. Pagano,Scott A. Shaffer,Julia Reisser,Michele Thums,Michael J. Weise,Carlos M. Duarte,Carlos M. Duarte +24 more
TL;DR: In this article, the authors proposed a global approach combining tracked movements of marine megafauna and human activities at sea, and using existing and emerging technologies (e.g., through new tracking devices and big data approaches) can be applied to deliver near real-time diagnostics on existing risks and threats to mitigate global risks.
Journal ArticleDOI
SSizer: Determining the Sample Sufficiency for Comparative Biological Study.
Fengcheng Li,Ying Zhou,Xiaoyu Zhang,Jing Tang,Qingxia Yang,Yang Zhang,Yongchao Luo,Jie Hu,Weiwei Xue,Yunqing Qiu,Qiaojun He,Bo Yang,Feng Zhu +12 more
TL;DR: An online tool SSizer is unique for its ability to comprehensively evaluate whether the sample size is sufficient and determine the required number of samples for user-input dataset, which therefore facilitate the comparative and OMIC-based biological studies.
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Spatiotemporal distribution patterns of immature Australasian white sharks (Carcharodon carcharias).
Julia L.Y. Spaet,Julia L.Y. Spaet,Toby A. Patterson,Russell W. Bradford,Paul A. Butcher,Paul A. Butcher +5 more
TL;DR: A comprehensive characterisation of the movement ecology of immature Australasian white sharks across multiple spatial scales is characterised and the body of knowledge available for population assessment and management is substantially expanded.
Journal ArticleDOI
Individual variation in residency and regional movements of reef manta rays Mobula alfredi in a large marine protected area
Samantha Andrzejaczek,Taylor K. Chapple,Taylor K. Chapple,David J. Curnick,Aaron B. Carlisle,Michael Castleton,David M. P. Jacoby,Lauren R. Peel,Lauren R. Peel,Robert J. Schallert,David Tickler,Barbara A. Block +11 more
TL;DR: In this article, the United Kingdom Foreign and Commonwealth Office and the British Indian Ocean Territory Administration for granting us permission to undertake the research, and two anonymous reviewers for providing constructive comments that improved the manuscript.
Journal ArticleDOI
Toward a global strategy for seabird tracking
Alice Bernard,Ana S. L. Rodrigues,Victor Cazalis,Victor Cazalis,David Grémillet,David Grémillet +5 more
TL;DR: In this paper, the authors identified and mined 689 seabird tracking studies, reporting on > 28,000 individuals of 216 species from 17 families over the last four decades.
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