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Marine Ecology Progress Series

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MEPS 528:277-288 (2015)  -  DOI:

Habitat selection of a coastal shark species estimated from an autonomous underwater vehicle

D. E. Haulsee1,*, M. W. Breece1, D. C. Miller1, B. M. Wetherbee2, D. A. Fox3, M. J. Oliver1

1College of Earth, Ocean and the Environment, University of Delaware, Lewes, DE 19958, USA
2Department of Biological Sciences, University of Rhode Island, Kingston, RI 02811, USA
3Department of Agriculture and Natural Resources, Delaware State University, Dover, DE 19901, USA
*Corresponding author:

ABSTRACT: Quantifying habitat selection in marine organisms is challenging because it is difficult to obtain species location information with multiple corresponding habitat measurements. In the ocean, habitat conditions vary on many spatiotemporal scales, which have important consequences for habitat selection. While macroscale biotic and abiotic features influence seasonal movements (spatial scales of 100-1000 km), selectivity of conditions on mesoscales (1-100 km) reflects an animal’s response to the local environment. In this study, we examined habitat selectivity by pairing acoustic telemetry with environmental habitat parameters measured by an autonomous underwater vehicle (AUV), and demonstrate that migrating sand tiger sharks Carcharias taurus along the East Coast of the USA did not randomly use the coastal environment. Of the variables examined, we found evidence to suggest that sand tigers were selecting their habitat based on distance to shore, salinity, and colored dissolved organic matter (CDOM). Notably, temperature was not predictive of habitat use in our study. We posit that during their coastal migration, sand tigers select for specific mesoscale coastal habitats that may inform navigation or feeding behaviors. To our knowledge, this is the first empirical measure of mesoscale habitat selection by a coastal marine organism using an AUV. The applications of this method extend beyond the habitat selectivity of sand tigers, and will prove useful for future studies combining in situ observations of marine habitats and animal observations.

KEY WORDS: Acoustic telemetry · Coastal habitats · Habitat utilization · Sand tiger shark · Autonomous underwater vehicle · Carcharias taurus

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Cite this article as: Haulsee DE, Breece MW, Miller DC, Wetherbee BM, Fox DA, Oliver MJ (2015) Habitat selection of a coastal shark species estimated from an autonomous underwater vehicle. Mar Ecol Prog Ser 528:277-288.

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