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Bioregion heterogeneity correlates with extensive mitochondrial DNA diversity in the Namaqua rock mouse, Micaelamys namaquensis (Rodentia: Muridae) from southern Africa - evidence for a species complex

Russo, I.-R.M.; Chimimba, C.T.; Bloomer, P. (BioMed Central Ltd., 2010)

Background: Intraspecific variation within the diverse southern African murine rodents has not been extensively investigated, yet cryptic diversity is evident in several taxa studied to date. The Namaqua rock mouse, ...

Ecological niche modeling of the invasive potential of Nile tilapia Oreochromis niloticus in African river systems: concerns and implications for the conservation of indigenous congenerics

Zengeya, T.A.; Robertson, M.P.; Booth, A.J.; Chimimba, C.T. (2013-06-30)

This study applied ecological niche models to determine the potential invasive range of Nile tilapia, Oreochromis niloticus, with a particular focus on river systems in southern Africa where it is now established and ...

Ontogenetic variation and craniometric sexual dimorphism in the social giant mole-rat, Fukomys mechowii (Rodentia: Bathyergidae), from Zambia

Chimimba, C.T.; Sichilima, A.M.; Faulkes, C.G.; Bennett, N.C. (2010-10)

The degree of maxillary molar tooth-row eruption and wear were used to assign samples of the social giant mole-rat, Fukomys mechowii, from Zambia, into nine relative age classes in order to assess ontogenetic (age) variation ...

Habitat-specific shaping of proliferation and neuronal differentiation in adult hippocampal neurogenesis of wild rodents

Cavegn, N.; van Dijk, R.M.; Menges, D.; Brettschneider, H.; Phalanndwa, M.; Chimimba, C.T.; Isler, K.; Lipp, H.P.; Slomianka, L.; Amrein, I. (Open Access Publishing, 2013-04)

Daily life of wild mammals is characterized by a multitude of attractive and aversive stimuli. The hippocampus processes complex polymodal information associated with such stimuli and mediates adequate behavioral responses. ...

Seasonal reproduction in the eastern rock elephant-shrew: Influenced by rainfall and ambient temperature?

Medger, K.; Chimimba, C.T.; Bennett, N.C. (Zoological Society of London, 2012)

Because environmental conditions vary seasonally in most regions, many small mammals reproduce at a specific time of the year to maximize their reproductive success. In the tropics and subtropics, the breeding season is ...

Evidence of a contact zone between Rhabdomys dilectus(Rodentia: Muridae) mitotypes in Gauteng province, South Africa

le Grange, A.; Bastos, A.D.S.; Brettschneider, H.; Chimimba, C.T. (Zoological Society of Southern Africa, 2015)

Recent studies have described the presence of several mitochondrial lineages within Rhabdomys, which was previously considered to be a monotypic genus. The exact distributional limits of the species and subspecies and their ...

A qualitative ecological risk assessment of the invasive Nile tilapia, Oreochromis niloticus in a sub-tropical African river system (Limpopo River, South Africa)

Zengeya, T.A.; Robertson, M.P.; Booth, A.J.; Chimimba, C.T. (John Wiley & Sons Ltd., 2013)

1. This study outlines the development of a qualitative risk assessment method and its application as a screening tool for determining the risk of establishment and spread of the invasive Nile tilapia, Oreochromis niloticus ...

Genetic monitoring detects an overlooked cryptic species and reveals the diversity and distribution of three invasive Rattus congeners in South Africa

Bastos, A.R.; Nair, D.; Taylor, P.J.; Brettschneider, H.; Kirsten, F.; Mostert, E.; von Maltitz, E.; Lamb, J.M.; van Hooft, P.; Belmain, S.R.; Contrafatto, G.; Downs, S.; Chimimba, C.T. (BioMed Central, 2011)

Background: South Africa’s long and extensive trade activity has ensured ample opportunities for exotic species introduction. Whereas the rich biodiversity of endemic southern African fauna has been the focus of many ...

Inter-island dispersal of flightless Bothrometopus huntleyi (Coleoptera: Curculionidae) from the sub-Antarctic Prince Edward Island archipelago

Grobler, G.C.; Bastos, A.D.S.; Chimimba, C.T.; Chown, S.L. (Antarctic Science Ltd, 2011)

Bothrometopus huntleyi is a flightless weevil endemic to the volcanically-formed sub-Antarctic Prince Edward Islands archipelago that arose approximately 0.5 million years ago (m.y.a.). Since emergence, a series of volcanic ...

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

van der Merwe, I.; Oosthuizen, M.K.; Chimimba, C.T.; Bennett, N.C. (The Zoological Society of London, 2011)

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 ...