Unrestricted gene flow between two subspecies of translocated brushtail possums (Trichosurus vulpecula) in Aotearoa New Zealand

  title={Unrestricted gene flow between two subspecies of translocated brushtail possums (Trichosurus vulpecula) in Aotearoa New Zealand},
  author={Nimeshika Pattabiraman and Mary Morgan‐Richards and Ralph G. Powlesland and Steven A. Trewick},
  journal={Biological Invasions},
Two lineages of brushtail possums ( Trichosurus vulpecula ) were historically introduced to Aotearoa New Zealand, and these two subspecies have different phenotypic forms. Despite over 100 years of potential interbreeding, they appear to retain morphological differences, which may indicate reproductive isolation. We examined this using population samples from a confined landscape and scored each specimen for phenotype using a number of fur colour traits. This resulted in a bimodal trait… 

Time‐calibrated phylogeny and ecological niche models indicate Pliocene aridification drove intraspecific diversification of brushtail possums in Australia

Abstract Major aridification events in Australia during the Pliocene may have had significant impact on the distribution and structure of widespread species. To explore the potential impact of



Has the introduction of two subspecies generated dispersal barriers among invasive possums in New Zealand?

The origins and population structure of common brushtail possums in the Hawkes Bay region of New Zealand are examined using a genotype-by-sequencing approach and clear evidence of a contact zone between them in which a hybrid form is evident.

Creating new evolutionary pathways through bioinvasion: the population genetics of brushtail possums in New Zealand

It is shown that T. vulpecula originating from at least two different Australian locations exhibit a population structure that is commensurate with their introduction history and which cannot be explained by landscape features alone, and a hybrid zone is identified between the two subspecies which appears to function as a barrier to dispersal.


Two morphological types of brushtail possum (Trichosurus vulpecula) were introduced to New Zealand: smaller, grey possums from mainland southeastern Australia, and larger, black possums from

High microsatellite diversity and differential structuring among populations of the introduced common brushtail possum, Trichosurus vulpecula, in New Zealand.

Populations on the two main islands of New Zealand had only slightly lower genetic diversity than did Australian populations, except that allelic richness on the South Is. was significantly lower and diversity in mainland New Zealand populations was significantly more diverse than offshore islands that represented secondary population size bottlenecks.

A systematic analysis of the brushtail possum, Trichosurus vulpecula (Kerr, 1792) (Marsupialia : Phalangeridae)

There are insufficient differences between populations of T. vulpecula to reject a null hypothesis that they comprise a single species, but other morphological characteristics and ecological data provide adequate evidence the T. caninus is a distinct species.

Population density estimates of brushtail possums (Trichosurus vulpecula) in dry grassland in New Zealand

Density estimates were similar to those recorded in radiata pine and beech forests in New Zealand, but were 5- to 29-fold lower than those in podocarp-broadleaved forest.

Microsatellite markers for the Phalangerid marsupial, the common brushtail possum (Trichosurus vulpecula)

No linkage disequilibrium was found, suggesting that there is no physical linkage between the loci, andocus independence and HardyÐWeinberg equilibrium (FIS estimates) were also found.

Do novel genotypes drive the success of an invasive bark beetle-fungus complex? Implications for potential reinvasion.

Analysis of population genetics and behavior of the fungus introduced by a highly invasive bark beetle to determine whether genetic changes in the fungus contributed to the invasive success of the beetle-fungal complex in China suggests a possible mechanism based on the evolution of a novel genotype during the two or three decades since its introduction.

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

This study has highlighted the value of genetic typing for detecting cryptic invasive species, providing historical insights into introductions and for directing future sampling, and indicated that R. rattus probably became established following at least two and three independent introductions, respectively.

Assortative mating frames establishment in a young island bird population

The observed genetic patterns unravel a complex colonization history to which migratory and mainland birds have contributed and which is characterized by assortative mating.