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Article: Predation by the sea urchin Strongylocentrotus droebachiensis on capsular egg masses of the whelk Buccinum undatum
Title | Predation by the sea urchin Strongylocentrotus droebachiensis on capsular egg masses of the whelk Buccinum undatum | ||||||||
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Authors | |||||||||
Keywords | Buccinum undatum Capsular egg masses Predation Sea urchin Strongylocentrotus droebrachiensis | ||||||||
Issue Date | 2008 | ||||||||
Publisher | Cambridge 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? | ||||||||
Abstract | We 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 Identifier | http://hdl.handle.net/10722/127433 | ||||||||
ISSN | 2023 Impact Factor: 1.1 2023 SCImago Journal Rankings: 0.355 | ||||||||
ISI Accession Number ID |
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 Field | Value | Language |
---|---|---|
dc.contributor.author | Dumont, CP | en_HK |
dc.contributor.author | Roy, JS | en_HK |
dc.contributor.author | Himmelman, JH | en_HK |
dc.date.accessioned | 2010-10-31T13:25:20Z | - |
dc.date.available | 2010-10-31T13:25:20Z | - |
dc.date.issued | 2008 | en_HK |
dc.identifier.citation | Journal Of The Marine Biological Association Of The United Kingdom, 2008, v. 88 n. 5, p. 1025-1031 | en_HK |
dc.identifier.issn | 0025-3154 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/127433 | - |
dc.description.abstract | We 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.language | eng | en_HK |
dc.publisher | Cambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=MBI | en_HK |
dc.relation.ispartof | Journal of the Marine Biological Association of the United Kingdom | en_HK |
dc.rights | Journal of Marine Biological Association of the United Kingdom. Copyright © Cambridge University Press. | - |
dc.subject | Buccinum undatum | en_HK |
dc.subject | Capsular egg masses | en_HK |
dc.subject | Predation | en_HK |
dc.subject | Sea urchin | en_HK |
dc.subject | Strongylocentrotus droebrachiensis | en_HK |
dc.title | Predation by the sea urchin Strongylocentrotus droebachiensis on capsular egg masses of the whelk Buccinum undatum | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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.email | Dumont, CP: dumont.clement@gmail.com | en_HK |
dc.identifier.authority | Dumont, CP=rp00692 | en_HK |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1017/S0025315408001628 | en_HK |
dc.identifier.scopus | eid_2-s2.0-48249141023 | en_HK |
dc.identifier.hkuros | 175367 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-48249141023&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 88 | en_HK |
dc.identifier.issue | 5 | en_HK |
dc.identifier.spage | 1025 | en_HK |
dc.identifier.epage | 1031 | en_HK |
dc.identifier.isi | WOS:000258750600019 | - |
dc.publisher.place | United Kingdom | en_HK |
dc.identifier.scopusauthorid | Dumont, CP=13407874500 | en_HK |
dc.identifier.scopusauthorid | Roy, JS=16837228800 | en_HK |
dc.identifier.scopusauthorid | Himmelman, JH=7005440550 | en_HK |
dc.identifier.issnl | 0025-3154 | - |