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Individual variation in marine larval-fish swimming speed and the emergence of dispersal kernels

Citation

Burgess, SC and Bode, M and Leis, JM and Mason, LB, Individual variation in marine larval-fish swimming speed and the emergence of dispersal kernels, Oikos, 2022, (3) Article e08896. ISSN 1600-0706 (2021) [Refereed Article]


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Copyright Statement

© 2021 The Authors. Oikos published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos. This is an open access article under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) License, (https://creativecommons.org/licenses/by/3.0/) which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

DOI: doi:10.1111/oik.08896

Abstract

Dispersal emerges as a consequence of how an individualís phenotype interacts with the environment. Not all dispersing individuals have the same phenotype, and variation among individuals can generate complex variation in the distribution of dispersal distances and directions. While active locomotion performance is an obvious candidate for a dispersal phenotype, its effects on dispersal are difficult to measure or predict, especially in small organisms dispersing in wind or currents. Therefore, we analyzed the effects of larval swimming on dispersal and settlement of coral-reef fish larvae using a high-resolution biophysical model. The model is, to date, the only biophysical model of marine larval dispersal that has been statistically validated against genetic parentage estimates of larval origin and destination, and incorporates empirically-estimated larval behaviors and their ontogeny. Larval swimming, in combination with depth, orientation and navigation behaviors, actually reduced dispersal distances compared to those of passive larvae. Swimming had no consistent effects on long distance dispersal, but increased the spread of settlement locations. Swimming speed, in contrast, did not consistently affect median dispersal distances, but faster swimming larvae had greater mean and maximum dispersal distances than slower swimming larvae. Finally, faster larval swimming speeds consistently increased the probability of settlement. Our analysis shows how larval swimming differentially affects multiple properties of dispersal kernels. In doing so, it indicates how selection could favor faster larval swimming to increase settlement and local retention, which may actually result in longer dispersal distances as a by-product of larvae trying to locate habitat rather than to disperse greater distances.

Item Details

Item Type:Refereed Article
Keywords:larval biology, dispersal, population connectivity, dispersal kernels, fisheries, conservation
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural ecology
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
UTAS Author:Leis, JM (Dr Jeff Leis)
ID Code:148190
Year Published:2021
Web of Science® Times Cited:5
Deposited By:Ecology and Biodiversity
Deposited On:2021-12-09
Last Modified:2022-04-21
Downloads:7 View Download Statistics

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