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Article: Group size and seasonal pattern of occurrence of humpback dolphins Sousa chinensis in Algoa Bay, South Africa

TitleGroup size and seasonal pattern of occurrence of humpback dolphins Sousa chinensis in Algoa Bay, South Africa
Authors
Issue Date1999
Citation
South African Journal Of Marine Science, 1999 n. 21, p. 89-97 How to Cite?
AbstractThe occurrence of humpback dolphins Sousa chinensis and their group size in Algoa Bay, South Africa, are described for the period May 1991-May 1994. The mean group size of dolphins was seven (ranging between 3 and 24). Group size was not affected by diurnal, tidal or lunar variability. Solitary, large individuals were commonly observed and they occasionally joined groups of other humpback dolphins. The number of sightings of humpback dolphins per unit effort and their group size varied seasonally, increasing in summer and again in late winter. These observations follow a regular seasonal fluctuation in water temperature, coincide with the dolphins' reproductive seasonal cycle and could be related to seasonal changes in the abundance and distribution of their prey.
Persistent Identifierhttp://hdl.handle.net/10722/178684
ISSN
2004 Impact Factor: 0.643
References

 

DC FieldValueLanguage
dc.contributor.authorKarczmarski, Len_US
dc.contributor.authorCockcroft, VGen_US
dc.contributor.authorMclachlan, Aen_US
dc.date.accessioned2012-12-19T09:49:08Z-
dc.date.available2012-12-19T09:49:08Z-
dc.date.issued1999en_US
dc.identifier.citationSouth African Journal Of Marine Science, 1999 n. 21, p. 89-97en_US
dc.identifier.issn0257-7615en_US
dc.identifier.urihttp://hdl.handle.net/10722/178684-
dc.description.abstractThe occurrence of humpback dolphins Sousa chinensis and their group size in Algoa Bay, South Africa, are described for the period May 1991-May 1994. The mean group size of dolphins was seven (ranging between 3 and 24). Group size was not affected by diurnal, tidal or lunar variability. Solitary, large individuals were commonly observed and they occasionally joined groups of other humpback dolphins. The number of sightings of humpback dolphins per unit effort and their group size varied seasonally, increasing in summer and again in late winter. These observations follow a regular seasonal fluctuation in water temperature, coincide with the dolphins' reproductive seasonal cycle and could be related to seasonal changes in the abundance and distribution of their prey.en_US
dc.languageengen_US
dc.relation.ispartofSouth African Journal of Marine Scienceen_US
dc.titleGroup size and seasonal pattern of occurrence of 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-s2.0-0033399552en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0033399552&selection=ref&src=s&origin=recordpageen_US
dc.identifier.issue21en_US
dc.identifier.spage89en_US
dc.identifier.epage97en_US
dc.identifier.scopusauthoridKarczmarski, L=6603422145en_US
dc.identifier.scopusauthoridCockcroft, VG=6701399767en_US
dc.identifier.scopusauthoridMcLachlan, A=7102503982en_US

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