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Article: A field technique for estimating the influence of surface complexity on movement tortuosity in the tropical limpet Cellana grata gould

TitleA field technique for estimating the influence of surface complexity on movement tortuosity in the tropical limpet Cellana grata gould
Authors
KeywordsForaging behaviour
Fractal dimension
Habitat complexity
Random walk
Topography
Trail complexity
Issue Date1999
PublisherApollo Books.
Citation
Ophelia, 1999, v. 50 n. 3, p. 215-224 How to Cite?
AbstractMost studies of the movement patterns of intertidal herbivores assess overall displacement in an assumed homogeneous environment. In the present study, the impact of substrate complexity on spatial patterns of foraging in the limpet, Cellana grata, was investigated on a rocky shore in Hong Kong. Movement patterns were measured by photographing individual C. grata every 10 minutes over an entire foraging cycle. From the photographs, limpet positions were mapped onto the shore at low water and individual trails re-constructed in situ. Individual movement tortuosity (using a sinuosity index from a correlated random walk model and the fractal dimension of movement paths), mean speed, overall net displacement and trail length were measured. Surface profiles were recorded using a contour gauge and surface complexity described using fractal dimensions. The paths of C. grata became more tortuous as the complexity of the rock surface increased, suggesting that the limpet avoids moving and foraging directly over surface irregularities. Actual trail length was almost three times greater than the overall net displacement. This field technique estimates spatial movement patterns of intertidal gastropods in three dimensions and highlights the importance of detailed analyses of movement paths during complete foraging excursions, especially in energetic studies of foraging.
Persistent Identifierhttp://hdl.handle.net/10722/73356
ISSN
2006 Impact Factor: 0.5
2007 SCImago Journal Rankings: 0.388
References

 

DC FieldValueLanguage
dc.contributor.authorErlandsson, Jen_HK
dc.contributor.authorKostylev, Ven_HK
dc.contributor.authorWilliams, GAen_HK
dc.date.accessioned2010-09-06T06:50:31Z-
dc.date.available2010-09-06T06:50:31Z-
dc.date.issued1999en_HK
dc.identifier.citationOphelia, 1999, v. 50 n. 3, p. 215-224en_HK
dc.identifier.issn0078-5326en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73356-
dc.description.abstractMost studies of the movement patterns of intertidal herbivores assess overall displacement in an assumed homogeneous environment. In the present study, the impact of substrate complexity on spatial patterns of foraging in the limpet, Cellana grata, was investigated on a rocky shore in Hong Kong. Movement patterns were measured by photographing individual C. grata every 10 minutes over an entire foraging cycle. From the photographs, limpet positions were mapped onto the shore at low water and individual trails re-constructed in situ. Individual movement tortuosity (using a sinuosity index from a correlated random walk model and the fractal dimension of movement paths), mean speed, overall net displacement and trail length were measured. Surface profiles were recorded using a contour gauge and surface complexity described using fractal dimensions. The paths of C. grata became more tortuous as the complexity of the rock surface increased, suggesting that the limpet avoids moving and foraging directly over surface irregularities. Actual trail length was almost three times greater than the overall net displacement. This field technique estimates spatial movement patterns of intertidal gastropods in three dimensions and highlights the importance of detailed analyses of movement paths during complete foraging excursions, especially in energetic studies of foraging.en_HK
dc.languageengen_HK
dc.publisherApollo Books.en_HK
dc.relation.ispartofOpheliaen_HK
dc.subjectForaging behaviouren_HK
dc.subjectFractal dimensionen_HK
dc.subjectHabitat complexityen_HK
dc.subjectRandom walken_HK
dc.subjectTopographyen_HK
dc.subjectTrail complexityen_HK
dc.titleA field technique for estimating the influence of surface complexity on movement tortuosity in the tropical limpet Cellana grata goulden_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0078-5326&volume=50&issue=3&spage=215&epage=224&date=1999&atitle=A+field+technique+for+estimating+the+influence+of+surface+complexity+on+movement+tortuosity+in+the+tropical+limpet+Cellana+grata+Goulden_HK
dc.identifier.emailWilliams, GA: hrsbwga@hkucc.hku.hken_HK
dc.identifier.authorityWilliams, GA=rp00804en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1080/00785326.1999.10409396-
dc.identifier.scopuseid_2-s2.0-0032783921en_HK
dc.identifier.hkuros53795en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032783921&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume50en_HK
dc.identifier.issue3en_HK
dc.identifier.spage215en_HK
dc.identifier.epage224en_HK
dc.publisher.placeDenmarken_HK
dc.identifier.scopusauthoridErlandsson, J=6602860527en_HK
dc.identifier.scopusauthoridKostylev, V=7005512944en_HK
dc.identifier.scopusauthoridWilliams, GA=7406082821en_HK

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