Acknowledgements
Research was conducted at the Bamfield Marine Sciences Centre, Bamfield,
BC. Many thanks to all the students and lab techs who helped with
rearing animals, especially T. MacKeracher, A. McConnell, T. Tai, and M.
Vance. This research was supported by grants to BRA from NSERC
(RGPIN-2015-06224) and CRC (1219403-2009).