Scaling of Activity Space in Marine Organisms across Latitudinal Gradients

Udyawer, Vinay, Huveneers, Charlie, Jaine, Fabrice, Babcock, Russell C., Brodie, Stephanie, Buscot, Marie Jeanne, Campbell, Hamish A., Harcourt, Robert G., Hoenner, Xavier, Ledee, Elodie J.I., Simpfendorfer, Colin A., Taylor, Matthew D., Armstrong, Asia, Barnett, Adam, Brown, Culum, Bruce, Barry, Butcher, Paul A., Cadiou, Gwenael, Couturier, Lydie I.E., Currey-Randall, Leanne, Drew, Michael, Dudgeon, Christine L., Dwyer, Ross G., Espinoza, Mario, Ferreira, Luciana C., Fowler, Anthony, Harasti, David, Harborne, Alastair R., Knott, Nathan A., Lee, Kate, Lloyd, Matt, Lowry, Michael, Marzullo, Teagan, Matley, Jordan, Mcallister, Jaime D., McAuley, Rory, McGregor, Frazer, Meekan, Mark, Mills, Kade, Norman, Bradley M., Oh, Beverly, Payne, Nicholas L., Peddemors, Vic, Piddocke, Toby, Pillans, Richard D., Reina, Richard D., Rogers, Paul, Semmens, Jayson M., Smoothey, Amy, Speed, Conrad W., van der Meulen, Dylan, and Heupel, Michelle (2023) Scaling of Activity Space in Marine Organisms across Latitudinal Gradients. American Naturalist, 201 (4). pp. 586-602.

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Unifying models have shown that the amount of space used by animals (e.g., activity space, home range) scales allometrically with body mass for terrestrial taxa; however, such relationships are far less clear for marine species. We compiled movement data from 1,596 individuals across 79 taxa collected using a continental passive acoustic telemetry network of acoustic receivers to assess allometric scaling of activity space. We found that ectothermic marine taxa do exhibit allometric scaling for activity space, with an overall scaling exponent of 0.64. However, body mass alone explained only 35% of the variation, with the remaining variation best explained by trophic position for teleosts and latitude for sharks, rays, and marine reptiles. Taxon-specific allometric relationships highlighted weaker scaling exponents among teleost fish species (0.07) than sharks (0.96), rays (0.55), and marine reptiles (0.57). The allometric scaling relationship and scaling exponents for the marine taxonomic groups examined were lower than those reported from studies that had collated both marine and terrestrial species data derived using various tracking methods. We propose that these disparities arise because previous work integrated summarized data across many studies that used differing methods for collecting and quantifying activity space, introducing considerable uncertainty into slope estimates. Our findings highlight the benefit of using large-scale, coordinated animal biotelemetry networks to address cross-taxa evolutionary and ecological questions.

Item ID: 79977
Item Type: Article (Research - C1)
ISSN: 1537-5323
Keywords: acoustic telemetry, Brownian bridge kernel utilization distribution (KUD), continental network, Integrated Marine Observing System (IMOS), metabolic theory, spatial ecology
Copyright Information: © 2023 The University of Chicago. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), which permits non-commercial reuse of the work with attribution. For commercial use, contact
Date Deposited: 30 Aug 2023 06:08
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 100%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1805 Marine systems and management > 180504 Marine biodiversity @ 100%
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