During July, 1990 - June, 1992 authors collected stomach contents of necropsied rodents that totalled 494 Arvicanthis niloticus (Desmarest, 1822), 356 Mastomys natalensis (Smith, 1834) and 273 Tatera valida (Wroughton, 1906) from natural, savanna fields in Nigeria, and 528 Arvicanthis and 367 Mastomys from nearby irrigated fields, where Tatera was never trapped. The materials were processed and microscopically analyzed to determine patterns of diet selection.
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Rabiu et al. (1997) studied this question.