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Article: Habitat use and preferences of Indo-Pacific humpback dolphins Sousa chinensis in Algoa Bay, South Africa

TitleHabitat use and preferences of Indo-Pacific humpback dolphins Sousa chinensis in Algoa Bay, South Africa
Authors
KeywordsActivity Index
Algoa Bay-Eastern Cape-South Africa-Indian Ocean
Behavior
Coastal Zone Conservation/Management
Coefficient Of Area Use
Habitat Preference And Use
Indo-Pacific Humpback Dolphin
Inshore Distribution
Sousa Chinensis
Issue Date2000
Citation
Marine Mammal Science, 2000, v. 16 n. 1, p. 65-79 How to Cite?
AbstractThis paper examines environmental and behavioral determinants of the habitat use and preferences of Indo-Pacific humpback dolphins inhabiting the Algoa Bay region on the south Eastern Cape coast of South Africa. In order to quantify the habitat use and preference, two indices were used, the Coefficient of Area Use (AU) and the Activity Index (AI). The dolphins inhabit a narrow strip of shallow, inshore waters of Algoa Bay and remain mostly within 400 m of the shore, in water less than 15 m deep, with no apparent preference for clear or turbid water. Water depth is probably the main factor limiting their inshore distribution, and the 25-m isobath seems to represent the critical depth. Within this confined, inshore distribution, dolphin activities concentrate in the vicinity of rocky reefs - their primary feeding grounds. Dolphin dependence on these shallow-water habitats is evident throughout the year and, consequently, the inshore shallow reefs are identified as the 'key habitat' which is of primary importance for humpback dolphins in Eastern Cape waters. The dolphins' dependence on this restricted type of habitat within an already restricted inshore distribution makes them particularly vulnerable to alteration or loss of this habitat.
Persistent Identifierhttp://hdl.handle.net/10722/178701
ISSN
2015 Impact Factor: 1.665
2015 SCImago Journal Rankings: 1.077
References

 

DC FieldValueLanguage
dc.contributor.authorKarczmarski, Len_US
dc.contributor.authorCockcroft, VGen_US
dc.contributor.authorMclachlan, Aen_US
dc.date.accessioned2012-12-19T09:49:13Z-
dc.date.available2012-12-19T09:49:13Z-
dc.date.issued2000en_US
dc.identifier.citationMarine Mammal Science, 2000, v. 16 n. 1, p. 65-79en_US
dc.identifier.issn0824-0469en_US
dc.identifier.urihttp://hdl.handle.net/10722/178701-
dc.description.abstractThis paper examines environmental and behavioral determinants of the habitat use and preferences of Indo-Pacific humpback dolphins inhabiting the Algoa Bay region on the south Eastern Cape coast of South Africa. In order to quantify the habitat use and preference, two indices were used, the Coefficient of Area Use (AU) and the Activity Index (AI). The dolphins inhabit a narrow strip of shallow, inshore waters of Algoa Bay and remain mostly within 400 m of the shore, in water less than 15 m deep, with no apparent preference for clear or turbid water. Water depth is probably the main factor limiting their inshore distribution, and the 25-m isobath seems to represent the critical depth. Within this confined, inshore distribution, dolphin activities concentrate in the vicinity of rocky reefs - their primary feeding grounds. Dolphin dependence on these shallow-water habitats is evident throughout the year and, consequently, the inshore shallow reefs are identified as the 'key habitat' which is of primary importance for humpback dolphins in Eastern Cape waters. The dolphins' dependence on this restricted type of habitat within an already restricted inshore distribution makes them particularly vulnerable to alteration or loss of this habitat.en_US
dc.languageengen_US
dc.relation.ispartofMarine Mammal Scienceen_US
dc.subjectActivity Indexen_US
dc.subjectAlgoa Bay-Eastern Cape-South Africa-Indian Oceanen_US
dc.subjectBehavioren_US
dc.subjectCoastal Zone Conservation/Managementen_US
dc.subjectCoefficient Of Area Useen_US
dc.subjectHabitat Preference And Useen_US
dc.subjectIndo-Pacific Humpback Dolphinen_US
dc.subjectInshore Distributionen_US
dc.subjectSousa Chinensisen_US
dc.titleHabitat use and preferences of Indo-Pacific humpback dolphins Sousa chinensis in Algoa Bay, South Africaen_US
dc.typeArticleen_US
dc.identifier.emailKarczmarski, L: leszek@hku.hken_US
dc.identifier.authorityKarczmarski, L=rp00713en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0033964830en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0033964830&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume16en_US
dc.identifier.issue1en_US
dc.identifier.spage65en_US
dc.identifier.epage79en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridKarczmarski, L=6603422145en_US
dc.identifier.scopusauthoridCockcroft, VG=6701399767en_US
dc.identifier.scopusauthoridMcLachlan, A=7102503982en_US

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