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Social structure in synanthropic populations of a murid rodent Mastomys natalensis in Senegal

100%

Granjon L. , Duplantier J. M.

Acta Theriologica

1993

tom 38

nr 1

Synanthropic populations of Mastomys natalensis (A. Smith, 1834) were studied in southeastern Sénégal in order to evaluate some elements of their social structure. Analysis of trapping data consisting in single and multiple captures indicates that adult males were less likely to be involved in multiple captures than any other category of individuals. Sex-ratio in adults was significantly female-biased, and multiple captures involving 4 individuals or more (up to 13) were characterized by the small number of adult males involved (usually one per capture). Dyadic encounters between males revealed a higher rate of aggressive behaviours in M. natalensis than in its sibling species M. huberti. These observations suggest that these synanthropic populations are subdivided in polygynous units in which: (1) a part of males are evicted from the social group before their maturity and (2) adult males of different social units display aggressive behaviour towards each other.

Karyotypic variation in two species of jerboas Jaculus jaculus and Jaculus orientalis [Rodentia, Dipodidae] from Tunisia

80%

Ben Faleh A. , Ben Othmen A. , Said K. , Granjon L.

Folia Biologica

2010

tom 58

nr 3-4

229-236

Water physiology and population dynamics in insular populations of Mastsomys huberti [Rodentia, Muridae]

80%

Granjon L. , Ganem G. , Ba K. , Duplantier J. M.

Polish Ecological Studies

1994

tom 20

nr 3-4

Community ecology of the terrestrial small mammals of Zakouma National Park, Chad

51%

Granjon L. , Houssin C. , Lecompte E. , Angaya M. , Cesar J. , Cornette R. , Dobigny G. , Denys C.

Acta Theriologica

2004

tom 49

nr 2

The terrestrial small mammal community of the Zakouma National Park (Chad) was assessed by live trapping in various habitats during the dry season. Nearly 3000 trap-nights yielded 505 captures of nine rodent and two shrew species, making up a representative small mammal community for the Sudanian savanna biotic zone. Murine rodents of the genus Mastomys dominated, with M. erythroleucus and M. cf. kollman- nspergeri occuring at similar abundances. The former was widespread and especially abundant in habitats with high tree cover. The latter was more localized, predominantly in annually flooded habitats characterized by a clay-rich soil, often with Acacia seyal as the main vegetation. Population structure differed between the two species, suggesting distinct reproductive strategies possibly linked with habitat preferences: the M. erythroleucus population comprised mainly young, immature individuals, whereas M. cf. kollmannspergeri was represented by older individuals, a significant fraction of which had already reproduced. Taterillus congicus and Tatera kempi (gerbilline rodents), togetjier with Lemniscomys zebra, were mainly found in more open habitats with sand-rich soils. Arvicanthis niloticus, Acomys cf. johannis, Mus mattheyi and Xerus erythropus were the other rodents captured, whereas shrews were represented by Crocidura fulvastra and Suncus sp.