- Registriert
- 16 Mrz 2008
- Beiträge
- 7.607
... und wieder die alte Klage - würden die Kaninchen in Afrika leben, wüßten wir genau, wie es um Sterblichkeit, Prädatorendruck, Seuchen, etc. stände, da es aber nur das "langweilige" europäische Kaninchen ist, gibt es fast keine Untersuchungen.
Ausgenommen eine französische Arbeit aus dem Jahr 2003, dessen englischen Abstract ich hier einmal einstelle :
Abstract - Assessment of genetic introgression following a wild rabbit restocking.
Wild rabbit (Oryctolagus cuniculus) restocking is a common practice in hunting
management in France. However rabbits generally experience heavy mortality
after release, which jeopardizes restocking efficiency. One may speak of release
success only when introduced individuals produce viable offspring. Here we present
a release experiment, which is appraised through survival and genetic data to evaluate
the subsequent breeding contribution of introduced rabbits. Preliminary genetic
analyses with 9 microsatellite markers led to choose a large population of rabbits in
Lot (south-western France) to restock a small population in Vendée (north-western
France), because there were some specific alleles in both populations. We translocated
55 rabbits from Lot to Vendée in late July 1999, and from radio-tracking data
of 35 individuals, we assessed a 49 % survival in December 1999, resulting in fact in
20 introduced rabbits still alive when the breeding season began. Spotlight census
indicated a resident breeding population size of about 45 individuals. Thus, there
were 31 % of introduced rabbits within the whole breeding population. Then, the
population was genetically sampled by live trapping, and thereafter by hunting. We
compared the genotypes of young individuals born after release (19) to those of
adults originating from either the resident population (29) or the source one (55).
Assignment of offspring to each parental population indicated a low breeding contribution
of introduced individuals as no young fully originated from the source
population, whereas only 6 juveniles were assigned to both populations. The estimated
introgression rate, about 20 %, was slightly lower than expected from a panmictic
model from the proportion of introduced breeders within the population.
Ausgenommen eine französische Arbeit aus dem Jahr 2003, dessen englischen Abstract ich hier einmal einstelle :
Abstract - Assessment of genetic introgression following a wild rabbit restocking.
Wild rabbit (Oryctolagus cuniculus) restocking is a common practice in hunting
management in France. However rabbits generally experience heavy mortality
after release, which jeopardizes restocking efficiency. One may speak of release
success only when introduced individuals produce viable offspring. Here we present
a release experiment, which is appraised through survival and genetic data to evaluate
the subsequent breeding contribution of introduced rabbits. Preliminary genetic
analyses with 9 microsatellite markers led to choose a large population of rabbits in
Lot (south-western France) to restock a small population in Vendée (north-western
France), because there were some specific alleles in both populations. We translocated
55 rabbits from Lot to Vendée in late July 1999, and from radio-tracking data
of 35 individuals, we assessed a 49 % survival in December 1999, resulting in fact in
20 introduced rabbits still alive when the breeding season began. Spotlight census
indicated a resident breeding population size of about 45 individuals. Thus, there
were 31 % of introduced rabbits within the whole breeding population. Then, the
population was genetically sampled by live trapping, and thereafter by hunting. We
compared the genotypes of young individuals born after release (19) to those of
adults originating from either the resident population (29) or the source one (55).
Assignment of offspring to each parental population indicated a low breeding contribution
of introduced individuals as no young fully originated from the source
population, whereas only 6 juveniles were assigned to both populations. The estimated
introgression rate, about 20 %, was slightly lower than expected from a panmictic
model from the proportion of introduced breeders within the population.