- Received August 17, 2014
- Accepted October 1, 2014
- Published online November 5, 2014.
Copyright & Usage
© 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
- 1Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599–3300, USA
- 2Department of Marine and Environmental Sciences, Marine Science Center, Northeastern University, Nahant, MA 01908, USA
- 3Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 29599–3280, USA