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Article: Effectiveness of a small marine reserve in southern China in protecting the harvested sea urchin Anthocidaris crassispina: A mark-and-recapture study
Title | Effectiveness of a small marine reserve in southern China in protecting the harvested sea urchin Anthocidaris crassispina: A mark-and-recapture study | ||||||
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Authors | |||||||
Keywords | Anthocidaris crassispina Growth model Marine protected area Mortality rate Sea urchin Southern China | ||||||
Issue Date | 2011 | ||||||
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/biocon | ||||||
Citation | Biological Conservation, 2011, v. 144 n. 11, p. 2674-2683 How to Cite? | ||||||
Abstract | Assessment of the effectiveness of protected areas requires information on population characteristics of the target species. This study used a mark-and-recapture approach to examine the population structure, individual growth, and mortality of the commercially harvested short-spined sea urchin Anthocidaris crassispina in a small (18ha) no-take marine reserve and two nearby non-protected sites. Sea urchins were tagged with fluorochrome and recaptured 1 year later. The size-at-age relationship was modelled using the Tanaka function, and mortality estimated using an exponential decay function coupled with the Tanaka growth parameters. The urchin population in the reserve consisted of a higher proportion of older individuals than populations in the two non-protected areas, however, large sea urchins (>50mm) were absent in the reserve. Sea urchins occurring at high densities (>15ind.m -2) in the reserve grew much slower than those outside the reserve, suggesting a density-dependant effect on growth. Growth ring analysis from the rotulae supported the mark-and-recapture results with the maximum number of rings being higher in the reserve than in non-protected sites. Urchins with the same number of growth rings inside the reserve were smaller than those outside the reserve. Within the reserve, urchins with the same number of growth rings were smaller at locations with higher urchin density. Annual mortality rate was lower in the reserve population than in the non-protected populations. These results illustrate the effectiveness of this small reserve in protecting A. crassispina from fishing. However, further study is required to examine whether a high density of small/old individuals is better than a medium density of large individuals in order to maximize the potential spillover of larvae by such small urchin refugia to the surrounding overfished areas. © 2011 Elsevier Ltd. | ||||||
Persistent Identifier | http://hdl.handle.net/10722/139733 | ||||||
ISSN | 2023 Impact Factor: 4.9 2023 SCImago Journal Rankings: 1.985 | ||||||
ISI Accession Number ID |
Funding Information: We thank M. P. Russell for advice on the tagging method, S.S. Chung, H.L. Wong, C.S. Kwan and C.K. Tang for assistance in the field, G. Williams and T.C. Wai for helpful comments on the manuscript, W.X. Wang for providing access to the marine facilities at HKUST, and three anonymous reviewers for critical comments. The study at the marine reserve has been approved by the Director of the Agriculture, Fisheries and Conservation Department. This study was supported by FRG/07-08/I-06 to JWQ and a postgraduate studentship to DCCL from Hong Kong Baptist University. | ||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lau, DCC | en_HK |
dc.contributor.author | Dumont, CP | en_HK |
dc.contributor.author | Lui, GCS | en_HK |
dc.contributor.author | Qiu, JW | en_HK |
dc.date.accessioned | 2011-09-23T05:54:50Z | - |
dc.date.available | 2011-09-23T05:54:50Z | - |
dc.date.issued | 2011 | en_HK |
dc.identifier.citation | Biological Conservation, 2011, v. 144 n. 11, p. 2674-2683 | en_HK |
dc.identifier.issn | 0006-3207 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/139733 | - |
dc.description.abstract | Assessment of the effectiveness of protected areas requires information on population characteristics of the target species. This study used a mark-and-recapture approach to examine the population structure, individual growth, and mortality of the commercially harvested short-spined sea urchin Anthocidaris crassispina in a small (18ha) no-take marine reserve and two nearby non-protected sites. Sea urchins were tagged with fluorochrome and recaptured 1 year later. The size-at-age relationship was modelled using the Tanaka function, and mortality estimated using an exponential decay function coupled with the Tanaka growth parameters. The urchin population in the reserve consisted of a higher proportion of older individuals than populations in the two non-protected areas, however, large sea urchins (>50mm) were absent in the reserve. Sea urchins occurring at high densities (>15ind.m -2) in the reserve grew much slower than those outside the reserve, suggesting a density-dependant effect on growth. Growth ring analysis from the rotulae supported the mark-and-recapture results with the maximum number of rings being higher in the reserve than in non-protected sites. Urchins with the same number of growth rings inside the reserve were smaller than those outside the reserve. Within the reserve, urchins with the same number of growth rings were smaller at locations with higher urchin density. Annual mortality rate was lower in the reserve population than in the non-protected populations. These results illustrate the effectiveness of this small reserve in protecting A. crassispina from fishing. However, further study is required to examine whether a high density of small/old individuals is better than a medium density of large individuals in order to maximize the potential spillover of larvae by such small urchin refugia to the surrounding overfished areas. © 2011 Elsevier Ltd. | en_HK |
dc.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/biocon | en_HK |
dc.relation.ispartof | Biological Conservation | en_HK |
dc.subject | Anthocidaris crassispina | en_HK |
dc.subject | Growth model | en_HK |
dc.subject | Marine protected area | en_HK |
dc.subject | Mortality rate | en_HK |
dc.subject | Sea urchin | en_HK |
dc.subject | Southern China | en_HK |
dc.title | Effectiveness of a small marine reserve in southern China in protecting the harvested sea urchin Anthocidaris crassispina: A mark-and-recapture study | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0006-3207&volume=144&issue=11&spage=2674&epage=2683&date=2011&atitle=Effectiveness+of+a+small+marine+reserve+in+southern+China+in+protecting+the+harvested+sea+urchin+Anthocidaris+crassispina:+a+mark-and-recapture+study | - |
dc.identifier.email | Dumont, CP: dumont.clement@gmail.com | en_HK |
dc.identifier.email | Lui, GCS: csglui@hku.hk | en_HK |
dc.identifier.authority | Dumont, CP=rp00692 | en_HK |
dc.identifier.authority | Lui, GCS=rp00755 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.biocon.2011.07.027 | en_HK |
dc.identifier.scopus | eid_2-s2.0-80052577416 | en_HK |
dc.identifier.hkuros | 195781 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-80052577416&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 144 | en_HK |
dc.identifier.issue | 11 | en_HK |
dc.identifier.spage | 2674 | en_HK |
dc.identifier.epage | 2683 | en_HK |
dc.identifier.isi | WOS:000295442900016 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Lau, DCC=26633140600 | en_HK |
dc.identifier.scopusauthorid | Dumont, CP=13407874500 | en_HK |
dc.identifier.scopusauthorid | Lui, GCS=8613288600 | en_HK |
dc.identifier.scopusauthorid | Qiu, JW=7403309861 | en_HK |
dc.identifier.citeulike | 9715973 | - |
dc.identifier.issnl | 0006-3207 | - |