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Article: Predation by the sea urchin Strongylocentrotus droebachiensis on capsular egg masses of the whelk Buccinum undatum

TitlePredation by the sea urchin Strongylocentrotus droebachiensis on capsular egg masses of the whelk Buccinum undatum
Authors
KeywordsBuccinum undatum
Capsular egg masses
Predation
Sea urchin
Strongylocentrotus droebrachiensis
Issue Date2008
PublisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=MBI
Citation
Journal Of The Marine Biological Association Of The United Kingdom, 2008, v. 88 n. 5, p. 1025-1031 How to Cite?
AbstractWe evaluated sea urchin Strongylocentrotus droebachiensis predation on egg masses of the whelk Buccinum undatum. The urchin actively grazes on the egg masses, even as they are being deposited on the bottom. Whelks preferentially lay their egg masses on vertical areas where urchin densities are 4-fold less than on flat areas. This strategy is advantageous, as experimental trials showed that the loss in the mass of capsules was 4 fewer on walls than on flat areas. Nevertheless, a high proportion of egg masses on walls show damage from predation. Urchins provided with egg masses in the laboratory, ingested the capsules at a steady rate over a 9-d period (5 urchins ingested 2.8 g.d-1). Urchins provided agar discs that included a preferred alga and whelk capsule walls ingested the discs at a rate that was half that observed for discs that only included the alga. Discs that included the preferred alga and capsule contents were eaten at the same rate as discs that only included the alga. Thus, capsule walls, but not the capsule contents, provide a defence against urchin predation. Laying aggregate egg masses likely provides only a limited advantage, as the attachment surface does not increase with the number of egg masses deposited together, so the risk of detachment increases. Consideration of the interactions between urchins and whelks is important in managing the fisheries of the two species. Copyright © Marine Biological Association of the United Kingdom 2008.
Persistent Identifierhttp://hdl.handle.net/10722/127433
ISSN
2015 Impact Factor: 1.094
2015 SCImago Journal Rankings: 0.509
ISI Accession Number ID
Funding AgencyGrant Number
NSERC
Quebec-Ocean
Biology Department of Universite Laval
Funding Information:

We are grateful to J-P. Parent, P. Grondin, and E. Castonguay for their extensive help with the field and laboratory work and to two referees for providing helpful comments on the manuscript. This study was funded by an NSERC grant to J.H.H. and additional financial support to C.P.D. was provided by Quebec-Ocean and the Biology Department of Universite Laval.

References

 

DC FieldValueLanguage
dc.contributor.authorDumont, CPen_HK
dc.contributor.authorRoy, JSen_HK
dc.contributor.authorHimmelman, JHen_HK
dc.date.accessioned2010-10-31T13:25:20Z-
dc.date.available2010-10-31T13:25:20Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal Of The Marine Biological Association Of The United Kingdom, 2008, v. 88 n. 5, p. 1025-1031en_HK
dc.identifier.issn0025-3154en_HK
dc.identifier.urihttp://hdl.handle.net/10722/127433-
dc.description.abstractWe evaluated sea urchin Strongylocentrotus droebachiensis predation on egg masses of the whelk Buccinum undatum. The urchin actively grazes on the egg masses, even as they are being deposited on the bottom. Whelks preferentially lay their egg masses on vertical areas where urchin densities are 4-fold less than on flat areas. This strategy is advantageous, as experimental trials showed that the loss in the mass of capsules was 4 fewer on walls than on flat areas. Nevertheless, a high proportion of egg masses on walls show damage from predation. Urchins provided with egg masses in the laboratory, ingested the capsules at a steady rate over a 9-d period (5 urchins ingested 2.8 g.d-1). Urchins provided agar discs that included a preferred alga and whelk capsule walls ingested the discs at a rate that was half that observed for discs that only included the alga. Discs that included the preferred alga and capsule contents were eaten at the same rate as discs that only included the alga. Thus, capsule walls, but not the capsule contents, provide a defence against urchin predation. Laying aggregate egg masses likely provides only a limited advantage, as the attachment surface does not increase with the number of egg masses deposited together, so the risk of detachment increases. Consideration of the interactions between urchins and whelks is important in managing the fisheries of the two species. Copyright © Marine Biological Association of the United Kingdom 2008.en_HK
dc.languageengen_HK
dc.publisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=MBIen_HK
dc.relation.ispartofJournal of the Marine Biological Association of the United Kingdomen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsJournal of Marine Biological Association of the United Kingdom. Copyright © Cambridge University Press.-
dc.subjectBuccinum undatumen_HK
dc.subjectCapsular egg massesen_HK
dc.subjectPredationen_HK
dc.subjectSea urchinen_HK
dc.subjectStrongylocentrotus droebrachiensisen_HK
dc.titlePredation by the sea urchin Strongylocentrotus droebachiensis on capsular egg masses of the whelk Buccinum undatumen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0025-3154&volume=88&issue=5&spage=1025&epage=1031&date=2008&atitle=Predation+by+the+sea+urchin+Strongylocentrotus+droebachiensis+on+capsular+egg+masses+of+the+whelk+Buccinum+undatum-
dc.identifier.emailDumont, CP: dumont.clement@gmail.comen_HK
dc.identifier.authorityDumont, CP=rp00692en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1017/S0025315408001628en_HK
dc.identifier.scopuseid_2-s2.0-48249141023en_HK
dc.identifier.hkuros175367en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-48249141023&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume88en_HK
dc.identifier.issue5en_HK
dc.identifier.spage1025en_HK
dc.identifier.epage1031en_HK
dc.identifier.isiWOS:000258750600019-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridDumont, CP=13407874500en_HK
dc.identifier.scopusauthoridRoy, JS=16837228800en_HK
dc.identifier.scopusauthoridHimmelman, JH=7005440550en_HK

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