Circadian rhythms of locomotor activity in the reddish-grey musk shrew (Eulipotyphla : Soricidae) from South Africa

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dc.contributor.author Van der Merwe, Ingrid
dc.contributor.author Oosthuizen, Maria Kathleen
dc.contributor.author Chimimba, Christian Timothy
dc.contributor.author Bennett, Nigel C., 1961-
dc.coverage.spatial South Africa en
dc.date.accessioned 2011-09-08T07:13:34Z
dc.date.available 2011-09-08T07:13:34Z
dc.date.issued 2011-06
dc.description.abstract The circadian rhythm of locomotor activity in a southern African shrew, the reddish-grey musk shrew Crocidura cyanea was investigated. Thirteen individuals were subjected to three successive light cycles, each cycle lasting approximately 2 weeks: an LD cycle (12 h light/12 h dark), a DD cycle (constant darkness) and a DL cycle (an inverse of the LD cycle). All of the animals exhibited entrainment of their activity to the LD and DL lighting regimes. Locomotor activity of C. cyanea occurred predominantly during the dark phases of the LD cycle and the DL cycle. Under LD, the mean active phase (a) of C. cyanea was 10.8 0.3 h and the total percentage of activity was 78.9% during the dark phase. When subjected to constant darkness, the mean active phase increased to 13.2 01.8 h and all animals expressed free-running rhythms of locomotor activity (mean 1 SD=23.0 0.55 h; range=22.4–23.7 h). On the reverse LD cycle, the mean active phase was lowest (09.3 0.16 h) and the total percentage of activity was 71.5% during the dark phase of the cycle. The reddish-grey musk shrew possesses a strong circadian rhythm of locomotor activity that predominantly occurs during the dark phase and consequently the musk shrew may essentially be considered a nocturnal mammal. en
dc.description.sponsorship The research was supported by a Department of Science and Techonlogy/National Research Foundation South African Research Chair of Mammal Behavioural Ecology and Physiology awarded to NCB. IVDM acknowledges a scholarship from the South African National Research Foundation (NRF). The work was supported by a collecting permit from the Department of Nature Conservation in Limpopo Province. en
dc.description.uri http://www3.interscience.wiley.com/journal/118535410/home-8369 en
dc.identifier.citation Van der Merwe, I, Oosthuizen, MK, Chimimba, CT & Bennett, NC 2011, 'Circadian rhythms of locomotor activity in the reddish-grey musk shrew (Eulipotyphla: Soricidae) from South Africa musk shrew (Eulipotyphla: Soricidae) from South Africa', Journal of Zoology, vol. 284, no. 2, pp. 124–132. en
dc.identifier.issn 0952-8369 (print)
dc.identifier.issn 1469-7998 (online)
dc.identifier.other 10.111/j.1469-7998.2010.00789.x
dc.identifier.uri http://hdl.handle.net/2263/17240
dc.language.iso en en
dc.publisher Wiley-Blackwell en
dc.rights © 2010 The Authors. Journal compilation © 2010 The Zoological Society of London. This article is embargoed by the publisher until June 2012. en
dc.subject Locomotor activity en
dc.subject Soricidae en
dc.subject Crocidura cyanea en
dc.subject.lcsh Shrews en
dc.subject.lcsh Circadian rhythms en
dc.subject.lcsh Animal locomotion en
dc.title Circadian rhythms of locomotor activity in the reddish-grey musk shrew (Eulipotyphla : Soricidae) from South Africa en
dc.type Postprint Article en


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