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Article: Spatial and temporal variation in diets of the crabs Metopograpsus frontalis (Grapsidae) and Perisesarma bidens (Sesarmidae): Implications for mangrove food webs

TitleSpatial and temporal variation in diets of the crabs Metopograpsus frontalis (Grapsidae) and Perisesarma bidens (Sesarmidae): Implications for mangrove food webs
Authors
KeywordsFeeding ecology
Grapsidae
Hong Kong
Mangroves
Sesarmidae
Issue Date2010
PublisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0018-8158
Citation
Hydrobiologia, 2010, v. 638, p. 29-40 How to Cite?
AbstractThe diets of the mangrove crabs, Metopograpsus frontalis Miers and Perisesarma bidens de Haan, were investigated monthly for 13 months at two Hong Kong mangroves, to examine possible spatial and temporal influences on their feeding ecology. In both species, a higher degree of gut fullness was observed in summer (May-September) than in winter, suggesting a reduction in winter foraging activity. M. frontalis was omnivorous, with animal and plant materials and inorganic sediments being the major food items. P. bidens was detritivorous, with plant materials and inorganic sediment dominating the gut contents. M. frontalis is, therefore, an opportunistic feeder, whilst P. bidens, like many other members of the Sesarmidae, is a detritivore. Some degree of seasonal variation was shown in the diet of M. frontalis (with more algal material in winter) and P. bidens (with more sediments in summer), but diets were similar between sexes in both species. The dietary pattern of M. frontalis also varied between sites. The diets of the crabs, therefore, appear to be a result of the interplay between the seasonal, physical climate and biological factors, especially food availability and the crabs' ecology. Results suggest that the predatory role of Metopograpsus, which has been poorly studied, is potentially important to estuarine food webs; whilst the trophic importance of sesarmid crabs, such as Perisesarma, especially in mangrove outwelling, should be critically re-evaluated. © Springer Science+Business Media B.V. 2009.
Persistent Identifierhttp://hdl.handle.net/10722/127346
ISSN
2015 Impact Factor: 2.051
2015 SCImago Journal Rankings: 1.043
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong
Funding Information:

This study forms part of the M. Phil thesis submitted by David Y. N. Poon and was supported by a postgraduate studentship funded by The University of Hong Kong. The authors would like to thank Peter Ng (National University of Singapore) for confirmation of the taxonomy of Metopograpsus frontalis, and Stefano Cannicci (Florence University, Italy) for constructive comments.

References

 

DC FieldValueLanguage
dc.contributor.authorPoon, DYNen_HK
dc.contributor.authorChan, BKKen_HK
dc.contributor.authorWilliams, GAen_HK
dc.date.accessioned2010-10-31T13:20:11Z-
dc.date.available2010-10-31T13:20:11Z-
dc.date.issued2010en_HK
dc.identifier.citationHydrobiologia, 2010, v. 638, p. 29-40en_HK
dc.identifier.issn0018-8158en_HK
dc.identifier.urihttp://hdl.handle.net/10722/127346-
dc.description.abstractThe diets of the mangrove crabs, Metopograpsus frontalis Miers and Perisesarma bidens de Haan, were investigated monthly for 13 months at two Hong Kong mangroves, to examine possible spatial and temporal influences on their feeding ecology. In both species, a higher degree of gut fullness was observed in summer (May-September) than in winter, suggesting a reduction in winter foraging activity. M. frontalis was omnivorous, with animal and plant materials and inorganic sediments being the major food items. P. bidens was detritivorous, with plant materials and inorganic sediment dominating the gut contents. M. frontalis is, therefore, an opportunistic feeder, whilst P. bidens, like many other members of the Sesarmidae, is a detritivore. Some degree of seasonal variation was shown in the diet of M. frontalis (with more algal material in winter) and P. bidens (with more sediments in summer), but diets were similar between sexes in both species. The dietary pattern of M. frontalis also varied between sites. The diets of the crabs, therefore, appear to be a result of the interplay between the seasonal, physical climate and biological factors, especially food availability and the crabs' ecology. Results suggest that the predatory role of Metopograpsus, which has been poorly studied, is potentially important to estuarine food webs; whilst the trophic importance of sesarmid crabs, such as Perisesarma, especially in mangrove outwelling, should be critically re-evaluated. © Springer Science+Business Media B.V. 2009.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0018-8158en_HK
dc.relation.ispartofHydrobiologiaen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectFeeding ecologyen_HK
dc.subjectGrapsidaeen_HK
dc.subjectHong Kongen_HK
dc.subjectMangrovesen_HK
dc.subjectSesarmidaeen_HK
dc.titleSpatial and temporal variation in diets of the crabs Metopograpsus frontalis (Grapsidae) and Perisesarma bidens (Sesarmidae): Implications for mangrove food websen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0018-8158&volume=638&spage=29&epage=40&date=2010&atitle=Spatial+and+temporal+variation+in+diets+of+the+crabs+Metopograpsus+frontalis+(Grapsidae)+and+Perisesarma+bidens+(Sesarmidae):+Implications+for+mangrove+food+websen_HK
dc.identifier.emailWilliams, GA: hrsbwga@hkucc.hku.hken_HK
dc.identifier.authorityWilliams, GA=rp00804en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s10750-009-0005-5en_HK
dc.identifier.scopuseid_2-s2.0-74249091925en_HK
dc.identifier.hkuros175984en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-74249091925&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume638en_HK
dc.identifier.spage29en_HK
dc.identifier.epage40en_HK
dc.identifier.isiWOS:000273244000004-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridPoon, DYN=8605425700en_HK
dc.identifier.scopusauthoridChan, BKK=7201530640en_HK
dc.identifier.scopusauthoridWilliams, GA=7406082821en_HK
dc.identifier.citeulike6475467-

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