Covering behavior of deep-water echinoids in Antarctica : possible response to predatory king crabs
Smith, Kathryn E.
Amsler, Margaret O.
Aronson, Richard B.
McClintock, James B.
MetadataShow full item record
Covering behavior refers to the propensity of echinoids (Echinoidea) to lift materials from the surrounding environment onto their aboral surfaces using their tube feet and spines. This behavior has been widely documented in regular echinoids from a variety of well-lit, shallow-marine habitats. Covering behavior in the deep sea, however, is rarely observed, and the functional significance of covering when it does occur remains speculative. During a photographic survey of the seafloor off Anvers Island and Marguerite Bay along the western Antarctic Peninsula, we imaged 11 benthic transects at depths ranging from 390 to 2100 m. We recorded the number of echinoid species, incidence of covering behavior, types of materials used for covering, potential predators of echinoids, and potential prey items for predators. The echinoid Sterechinus spp. was found at all depths, and the percentage of individuals exhibiting covering behavior increased with depth between 390 and 1500 m. There was a significant positive correlation between the incidence of covering behavior in Sterechinus spp. and the density of king crabs (Anomura: Lithodidae), crushing predators that may be expanding their bathymetric range up the Antarctic continental slope as a consequence of ongoing climatic warming. In contrast, covering behavior was not positively correlated with the densities of non-crab predators, the total densities of predators, or the availability of prey. Our results document rarely observed covering behavior in echinoids living in the deep sea and suggest that covering could be a behavioral response to predation pressure by king crabs.
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Marine Ecology Progress Series 553 (2016): 155-162, doi:10.3354/meps11739.
Suggested CitationArticle: Brothers, Cecilia, Smith, Kathryn E., Amsler, Margaret O., Aronson, Richard B., Singh, Hanumant, McClintock, James B., "Covering behavior of deep-water echinoids in Antarctica : possible response to predatory king crabs", Marine Ecology Progress Series 553 (2016): 155-162, DOI:10.3354/meps11739, https://hdl.handle.net/1912/8461
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Shimada, Koji; Kamoshida, Takashi; Itoh, Motoyo; Nishino, Shigeto; Carmack, Eddy C.; McLaughlin, Fiona A.; Zimmermann, Sarah; Proshutinsky, Andrey (American Geophysical Union, 2006-04-21)The spatial pattern of recent ice reduction in the Arctic Ocean is similar to the distribution of warm Pacific Summer Water (PSW) that interflows the upper portion of halocline in the southern Canada Basin. Increases in ...
Cover Unknown author (IAMSLIC, 2005)"The color of the cover was chosen to match the color of the Golden Wattle (Acacia pycnantha), the national floral emblem of Australia, which was in bloom at the time of the IAMSLIC conference."
Islam, Fakhrul; DeGrandpre, Michael D.; Beatty, Cory; Timmermans, Mary-Louise; Krishfield, Richard A.; Toole, John M.; Laney, Samuel R. (John Wiley & Sons, 2017-02-25)Understanding the physical and biogeochemical processes that control CO2 and dissolved oxygen (DO) dynamics in the Arctic Ocean (AO) is crucial for predicting future air-sea CO2 fluxes and ocean acidification. Past studies ...