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Article: Effects of predation and habitat structure on the abundance and population structure of the rock shrimp Rhynchocinetes typus (Caridea) on temperate rocky reefs

TitleEffects of predation and habitat structure on the abundance and population structure of the rock shrimp Rhynchocinetes typus (Caridea) on temperate rocky reefs
Authors
KeywordsAbundance
Aggregation behavior
Anthropogenic effect
Behavioral response
Crustacean
Issue Date2012
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00227/index.htm
Citation
Marine Biology, 2012, v. 159 n. 9, p. 2075-2089 How to Cite?
AbstractHuman disturbances, such as overfishing, may disrupt predator-prey interactions and modify food webs. Underwater surveys were carried out at six shallow-water reef barrens in temperate waters of northern-central Chile from October to December 2010 to describe the effects of predation, habitat complexity (low, medium and high) and refuge availability on the abundance and population structure of the rock shrimp Rhynchocinetes typus (Rhynchocinetidae), an important mesoconsumer on subtidal hard substrata. Three sites were within managed (restricted access) areas for fishermen, and three were unmanaged (open-access). Field observations and tethering experiments were conducted to examine the relationship between fish and shrimp abundances, and the relative predation rates on shrimps. Direct effects of predation on R. typus body-size distribution were examined from shrimps collected in the field and fish stomachs. The presence and the abundance of R. typus increased with habitat reef complexity and refuge availability. Shrimp abundance was negatively related to fish abundance in managed areas, but not in open-access areas, where shrimp densities were the highest. Also, predation rates and body-size distribution of shrimps were unrelated, although fish consumed more large shrimps than should be expected from their distribution in the field. R. typus occurred most often in shelters with wide openings, offering limited protection against predators, but providing potential aggregation sites for shrimps. Overall, direct effects of predation on shrimp densities and population structure were weak, but indirect effects on shrimp distribution within reefs appear to have been mediated through behavioural responses. Our study highlights the need to assess both numerical and behavioural responses of prey to determine the effects of predator loss on mesoconsumer populations. © 2012 The Author(s).
Persistent Identifierhttp://hdl.handle.net/10722/160588
ISSN
2015 Impact Factor: 2.375
2015 SCImago Journal Rankings: 1.302
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorOry, NCen_HK
dc.contributor.authorDudgeon, Den_HK
dc.contributor.authorDumont, CPen_HK
dc.contributor.authorMiranda, Len_HK
dc.contributor.authorThiel, Men_HK
dc.date.accessioned2012-08-16T06:14:48Z-
dc.date.available2012-08-16T06:14:48Z-
dc.date.issued2012en_HK
dc.identifier.citationMarine Biology, 2012, v. 159 n. 9, p. 2075-2089en_HK
dc.identifier.issn0025-3162en_HK
dc.identifier.urihttp://hdl.handle.net/10722/160588-
dc.description.abstractHuman disturbances, such as overfishing, may disrupt predator-prey interactions and modify food webs. Underwater surveys were carried out at six shallow-water reef barrens in temperate waters of northern-central Chile from October to December 2010 to describe the effects of predation, habitat complexity (low, medium and high) and refuge availability on the abundance and population structure of the rock shrimp Rhynchocinetes typus (Rhynchocinetidae), an important mesoconsumer on subtidal hard substrata. Three sites were within managed (restricted access) areas for fishermen, and three were unmanaged (open-access). Field observations and tethering experiments were conducted to examine the relationship between fish and shrimp abundances, and the relative predation rates on shrimps. Direct effects of predation on R. typus body-size distribution were examined from shrimps collected in the field and fish stomachs. The presence and the abundance of R. typus increased with habitat reef complexity and refuge availability. Shrimp abundance was negatively related to fish abundance in managed areas, but not in open-access areas, where shrimp densities were the highest. Also, predation rates and body-size distribution of shrimps were unrelated, although fish consumed more large shrimps than should be expected from their distribution in the field. R. typus occurred most often in shelters with wide openings, offering limited protection against predators, but providing potential aggregation sites for shrimps. Overall, direct effects of predation on shrimp densities and population structure were weak, but indirect effects on shrimp distribution within reefs appear to have been mediated through behavioural responses. Our study highlights the need to assess both numerical and behavioural responses of prey to determine the effects of predator loss on mesoconsumer populations. © 2012 The Author(s).en_HK
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00227/index.htmen_HK
dc.relation.ispartofMarine Biologyen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectAbundance-
dc.subjectAggregation behavior-
dc.subjectAnthropogenic effect-
dc.subjectBehavioral response-
dc.subjectCrustacean-
dc.titleEffects of predation and habitat structure on the abundance and population structure of the rock shrimp Rhynchocinetes typus (Caridea) on temperate rocky reefsen_HK
dc.typeArticleen_HK
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.emailDumont, CP: dumont.clement@gmail.comen_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.identifier.authorityDumont, CP=rp00692en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1007/s00227-012-1994-6en_HK
dc.identifier.scopuseid_2-s2.0-84865820703en_HK
dc.identifier.hkuros205663en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84865820703&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume159en_HK
dc.identifier.issue9en_HK
dc.identifier.spage2075en_HK
dc.identifier.epage2089en_HK
dc.identifier.isiWOS:000308066400018-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridOry, NC=55308373200en_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK
dc.identifier.scopusauthoridDumont, CP=13407874500en_HK
dc.identifier.scopusauthoridMiranda, L=24475272500en_HK
dc.identifier.scopusauthoridThiel, M=35231340100en_HK
dc.identifier.citeulike10887113-

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