A year-long trapping study showed that species utilize spatial niche partitioning, but aggregate the timing of their activity, in areas with high levels of rodent activity. In a field experiment with dyed seeds I found that cache pilfering occurred infrequently, and a field-enclosure experiment revealed that none of the species use heterospecific scent to find (or avoid) seed caches. longimembris, if pocket mice pilfer from the other species' seed caches more frequently than the other species pilfer from their caches. However, the presence of other members of the seed-foraging guild could have a net benefit for P. As such, temporarily reducing the density of competing species might be an advisable reintroduction strategy, in combination with other interventions, such as predator exclusion. Repeated aggressive interactions from resident heterospecifics could lower the chances of reintroduced pocket mice establishing burrows during the critical settlement period. Body size asymmetries strongly predicted dominance, regardless of phylogenetic relatedness or residency status.
longimembris and four sympatric species, and determined that pocket mice, the smallest species, are subordinate to all larger species. I conducted simulated territory intrusion experiments between P. The species in this foraging guild compete for seeds both exploitatively and through direct interference interactions. The endangered Pacific pocket mouse (Perognathus longimembris pacificus) is being reintroduced to parts of its former range where multiple species of native rodents have overlapping diets. Reintroduction programs for endangered species rarely take competitive interactions between species into account.
0 kommentar(er)
