摘要:

Seventy‐seven house mice (Mus domesticus) from Eday, Orkney were released into a long‐established population on the Isle of May (56o12'N) in 1982. Introduced allozymes, mt and Y‐chromosome DNA, and Robertsonian chromosomes spread rapidly, reaching approximate stabilityc. 3 years later at frequencies different to those in both parental populations. The hybrid population was morphometrically intermediate between the two parents. This is a preliminary summary only; full details will be published else

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1990.tb00836.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

In Australia, populations of mice occasionally irrupt into plagues, mainly in the southern and eastern grain‐growing regions.Mus domesticuswas the only member of the subgenusMusidentified from a genetic survey of animals collected from four states. Little is known of the origin of these mice but they probably came from Europe where plagues do not occur. We examined whether mice have evolved the ability to plague since their colonization by comparing some population parameters of Australian, European and North American mice. Their helminth fauna were contrasted to gauge the importance of founder effects on the evolution of mice in Australia.Australian mice share 52% (12 of 23) of the helminths found in mice in Europe and North America. Those not shared mainly had indirect life cycles. The absence of species could be explained by a strong founder effect or the lack of suitable intermediate hosts near Australian ports. There was no evidence that population structure or diet had evolved differently. Population abundance was different in field populations especially during the build‐up and irruption of plagues. These differences were related to better breeding by mice in Australia in field environments; average number of embryos per litter was substantially higher and breeding seasons longer. Genetic change is not the only explanation for this increased productivity–a combination of lack of interspecific competition from other granivores and more favourable climatic conditions may be responsible.All things considered, there was no compelling evidence that Australian mice have evolved the ability to plague. Their ability to respond to good conditions by increasing litter size beyond that recorded elsewhere supports the notion that control of mouse productivity is an appropriate management option for plague preve

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1990.tb00837.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1990.tb00816a.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY