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Scavenging in Antarctica: intense variation between sites and seasons in shallow benthic necrophagy

Scavenging in Antarctica: intense variation between sites and seasons in shallow benthic necrophagy
Scavenging in Antarctica: intense variation between sites and seasons in shallow benthic necrophagy
The response of scavengers to a feeding cue at Adelaide Island, West Antarctic Peninsula was investigated using a baited video camera system. Fourteen experimental deployments, each lasting 72 h were conducted at two contrasting sites during the winter and summer of 2005. The rate of bait consumption varied between sites but not between seasons, and was low in comparison with studies at lower latitudes and greater depths. At the Hangar Cove site, the nemertean Parborlasia corrugatus was out-competed at the bait and displaced by the lysianassid amphipod Cheirmedon femoratus during winter. However, C. femoratus did not feed on the bait during summer, allowing P. corrugatus to monopolise the feeding opportunity. At the South Cove site the asteroid Odontaster validus dominated the bait in both seasons but sporadic feeding by the nototheniid fish Notothenia coriiceps considerably affected consumption rates during two of the six deployments. Scavengers were attracted to the bait in very high numbers and opportunistic necrophagy seems to be a successful strategy in an environment that is intensely disturbed by ice.
baited camera, consumption rates, necrophagy, scavengers, southern ocean
0022-0981
405-417
Smale, Dan A.
19528a3a-f66c-474d-ae13-c6405b8014ab
Barnes, David K.A.
f53924ec-169f-4620-9e9b-c51a405bf6ca
Fraser, Keiron P.P.
7f42cac7-8764-4f94-a80c-cd93ad2649fc
Mann, Paul J.
ca4bb807-ad80-4647-9f2b-6768951ddf50
Brown, Matt P.
274c01f3-d0bc-4a46-bf83-f21dbf6f4dd9
Smale, Dan A.
19528a3a-f66c-474d-ae13-c6405b8014ab
Barnes, David K.A.
f53924ec-169f-4620-9e9b-c51a405bf6ca
Fraser, Keiron P.P.
7f42cac7-8764-4f94-a80c-cd93ad2649fc
Mann, Paul J.
ca4bb807-ad80-4647-9f2b-6768951ddf50
Brown, Matt P.
274c01f3-d0bc-4a46-bf83-f21dbf6f4dd9

Smale, Dan A., Barnes, David K.A., Fraser, Keiron P.P., Mann, Paul J. and Brown, Matt P. (2007) Scavenging in Antarctica: intense variation between sites and seasons in shallow benthic necrophagy. Journal of Experimental Marine Biology and Ecology, 349 (2), 405-417. (doi:10.1016/j.jembe.2007.06.002).

Record type: Article

Abstract

The response of scavengers to a feeding cue at Adelaide Island, West Antarctic Peninsula was investigated using a baited video camera system. Fourteen experimental deployments, each lasting 72 h were conducted at two contrasting sites during the winter and summer of 2005. The rate of bait consumption varied between sites but not between seasons, and was low in comparison with studies at lower latitudes and greater depths. At the Hangar Cove site, the nemertean Parborlasia corrugatus was out-competed at the bait and displaced by the lysianassid amphipod Cheirmedon femoratus during winter. However, C. femoratus did not feed on the bait during summer, allowing P. corrugatus to monopolise the feeding opportunity. At the South Cove site the asteroid Odontaster validus dominated the bait in both seasons but sporadic feeding by the nototheniid fish Notothenia coriiceps considerably affected consumption rates during two of the six deployments. Scavengers were attracted to the bait in very high numbers and opportunistic necrophagy seems to be a successful strategy in an environment that is intensely disturbed by ice.

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More information

Published date: 19 October 2007
Keywords: baited camera, consumption rates, necrophagy, scavengers, southern ocean
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 348329
URI: http://eprints.soton.ac.uk/id/eprint/348329
ISSN: 0022-0981
PURE UUID: cacedc0e-0c2f-4a6d-a9e0-b3ee7c46fd16

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Date deposited: 12 Feb 2013 12:03
Last modified: 14 Mar 2024 12:58

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Contributors

Author: Dan A. Smale
Author: David K.A. Barnes
Author: Keiron P.P. Fraser
Author: Paul J. Mann
Author: Matt P. Brown

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