We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Importance of Assessing Population Genetic Structure before Eradication of Invasive Species: Examples from Insular Norway Rat Populations.
- Authors
ABDELKRIM, JAWAD; PASCAL, MICHEL; CALMET, CLAIRE; SAMADI, SARAH
- Abstract
Determining the inter-island migration abilities of pest species and delimiting eradication units enable more viable long-term eradication campaigns because recurrent colonization from neighboring islands is avoided. We examined the genetic structure of the invasive Norway rat (Rattus norvegicus ) to identify gene flow between islands and delimit population units at different geographical scales. We investigated variation in eight microsatellite loci in rat populations from 18 islands, representing five archipelagos off the Brittany coast (France). Although most of the islands are isolated from each other, short genetic distances, weak FST values between close islands, and a high level of cross-assignment showed that individuals collected on different islands could represent a single population unit. A Bayesian clustering method also supported the existence of high levels of gene flow between some neighboring islands. Thus, the statement “one island equals one population” can be false when inter-island distances are less than a few hundred meters. Genetic studies enable the definition of island clusters among which migration may occur that should be considered eradication units. To avoid reinvasion and to minimize ecological and economic costs, rats on all islands in an eradication unit should be eradicated simultaneously. We suggest that the genetic monitoring we performed here can be applied for management of any pest.
- Subjects
RATTUS norvegicus; RATS; ANIMAL populations; ANIMAL ecology; BIOLOGICAL invasions; ANIMAL introduction; ISLANDS; MICROSATELLITE repeats
- Publication
Conservation Biology, 2005, Vol 19, Issue 5, p1509
- ISSN
0888-8892
- Publication type
Article
- DOI
10.1111/j.1523-1739.2005.00206.x