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33 results for “invasive rodents”
Impacts of black rat invasion on the primary rodent host of Lassa virus, Mastomys natalensis
<p>Shared here is code and data supporting the manuscript, "Reservoir displacement by an invasive rodent reduces Lassa virus zoonotic spillover risk."</p> <p>The project directory, which contains numerous large raster data files, was stored as a split zip archive to facilitate upload to Zenodo and consists of the files "rat_invasion.z01", "rat_invasion.z02", "rat_invasion.z03", and "rat_invasion.zip". Following download, these files may need to be decompressed using dedicated archiver software (such as The Unarchiver [https://theunarchiver.com/] on macOS). Note that the entire project repository is ~7 GB when uncompressed. The files shared here mirror the GitHub project repository (https://github.com/eveskew/rat_invasion) with the addition of the large environmental raster data in the "data/environmental" subdirectory.</p>
Figs 3–4 in Dispersal History Of An Invasive Rodent In Hungary - Subfossil Finds Of Rattus Rattus
Figs 3–4. Skull (ventral view) of one of the black rats from site: 3 = Budapest, District XVII, Péceli Road (Roman Period); 4 = Dusnok–Szúnyogosi dűlő (Roman Period). Scale bars 10 mm
Fig. 1 in Dispersal History Of An Invasive Rodent In Hungary - Subfossil Finds Of Rattus Rattus
Fig. 1. Investigated archaeological sites in Hungary with small mammal fauna. = open air sites with using flotation method, black rat absence; = open air/cave sites with using flotation method,
Towards substitution of invasive telemetry: An integrated home cage concept for unobtrusive monitoring of objective physiological parameters in rodents - Minimal dataset
<p>Minimal dataset for unobtrusive monitoring of vital parameters in rodents.</p>
Invasive rodent responses to experimental and natural hurricanes with implications for global climate change
Find these data here: https://doi.org/10.5061/dryad.r7sqv9sfz Hurricanes cause dramatic changes to forests by opening the canopy and depositing debris onto the forest floor. How invasive rodent populations respond to hurricanes is not well understood, but shifts in rodent abundance and foraging may result from scarce fruit and seed resources that follow hurricanes. We conducted studies in a wet tropical forest in Puerto Rico to better understand how experimental (Canopy Trimming Experiment) and natural (Hurricane Maria) hurricane effects alter populations of invasive rodents (Rattus rattus [rats] and Mus musculus [mice]) and their foraging behaviors. To monitor rodent populations, we used tracking tunnels (inked and baited cards inside tunnels enabling identification of animal visitors’ footprints) within experimental hurricane plots (arborist trimmed in 2014) and reference plots (closed canopy forest). To assess shifts in rodent foraging, we compared seed removal of two tree species (Guarea guidonia and Prestoea acuminata) between vertebrate-excluded and free-access treatments in the same experimental and reference plots, and did so 3 months before and 9 months after Hurricane Maria (2017). Trail cameras were used to identify animals responsible for seed removal. Rat incidences generated from tracking tunnel surveys indicated that rat populations were not significantly affected by experimental or natural hurricanes. Before Hurricane Maria there were no mice in the forest interior, yet mice were present in forest plots closest to the road after the hurricane, and their forest invasion coincided with increased grass cover resulting from open forest canopy. Seed removal of Guarea and Prestoea across all plots was rat dominated (75%-100% rat-removed) and was significantly less after than before Hurricane Maria. However, following Hurricane Maria, the experimental hurricane treatment plots of 2014 had 3.6 times greater seed removal by invasive rats than did the referenc
Data from: Cascading effects of earthworm invasion in tundra increase graminoid density and rodent grazing intensities
<p>Earthworms are being introduced to numerous ecosystems through human activities. Some non-native earthworm species have the potential to 'geoengineer' soils and increase plant nitrogen (N) uptake, but if the increased plant N concentrations can cause increased rodent grazing is not well known. In this study, we present findings from a common garden experiment with two tundra communities, meadow (forb dominated) and heath (shrub dominated), half of them subjected to four years of earthworm presence (<em>Lumbricus</em> spp. and <em>Aporrectodea</em> spp.). Within four summers, our earthworm treatment changed plant community composition by increasing graminoid density by on average 94 % in the heath vegetation and by 49 % in the meadow. Rodent winter grazing were more intense on plants growing in soils with earthworms, an effect that coincided with higher nitrogen concentrations in plants indicating a higher palatability. Moreover, although the earthworms decreased soil moisture, our proxy for plant community photosynthesis (greenness) was not negatively affected. We conclude that earthworm-induced changes in plant composition and trophic interactions may radically alter the functioning of tundra ecosystems.</p>
Invasive rodent responses to experimental and natural hurricanes with implications for global climate change
<p>Hurricanes cause dramatic changes to forests by opening the canopy and depositing debris onto the forest floor. How invasive rodent populations respond to hurricanes is not well understood, but shifts in rodent abundance and foraging may result from scarce fruit and seed resources that follow hurricanes. We conducted studies in a wet tropical forest in Puerto Rico to better understand how experimental (Canopy Trimming Experiment) and natural (Hurricane Maria) hurricane effects alter populations of invasive rodents (Rattus rattus [rats] and <em>Mus musculus</em> [mice]) and their foraging behaviors. To monitor rodent populations, we used tracking tunnels (inked and baited cards inside tunnels enabling identification of animal visitors' footprints) within experimental hurricane plots (arborist trimmed in 2014) and reference plots (closed canopy forest). To assess shifts in rodent foraging, we compared seed removal of two tree species (Guarea guidonia and Prestoea acuminata) between vertebrate-excluded and free-access treatments in the same experimental and reference plots, and did so 3 months before and 9 months after Hurricane Maria (2017). Trail cameras were used to identify animals responsible for seed removal. Rat incidences generated from tracking tunnel surveys indicated that rat populations were not significantly affected by experimental or natural hurricanes. Before Hurricane Maria there were no mice in the forest interior, yet mice were present in forest plots closest to the road after the hurricane, and their forest invasion coincided with increased grass cover resulting from open forest canopy. Seed removal of Guarea and Prestoea across all plots was rat dominated (75%-100% rat-removed) and was significantly less after than before Hurricane Maria. However, following Hurricane Maria, the experimental hurricane treatment plots of 2014 had 3.6 times greater seed removal by invasive rats than did the reference plots, which may have resulted from rats selecting post-hurricane forest patches with greater understory cover for foraging. Invasive rodents are resistant to hurricane disturbance in this forest. Predictions of increased hurricane frequency from expected climate change should result in forest with more frequent periods of grassy understories and mouse presence, as well as with heightened rat foraging for fruit and seed in pre-existing areas of disturbance.</p>
The timid invasion: Behavioural adjustments and range expansion in a non-native rodent
<p><span>Animal behaviour can moderate</span> <span>or favour biological invasion processes, and the native fauna's ability to adapt. The importance of behavioural traits for colonization success remains debated, as well as the nature of behavioural traits that facilitate colonization. We investigated behavioural responses associated with risk-taking and exploration, in both non-native bank voles (<em>Myodes</em> <em>glareolus</em>, N = 225) accidentally introduced to Ireland a century ago, and in native wood mice (<em>Apodemus</em> <em>sylvaticus</em>, N = 189), that decline in numbers with vole expansion. </span></p> <p><span>We repeatedly sampled behavioural responses in three colonization zones: source (2 sites), expansion edge (4) and pre-arrival(2). Only source and edge zones are occupied by bank voles, for more than 80 years and 1-4 years, respectively. </span></p> <p><span>Individuals of both species varied consistently in risk-taking and exploration, and mice had not adjusted their behaviour to the presence of non-native voles, as their behaviour did not differ between the zones. Voles at the expansion edge were initially more risk-averse but habituated to the repeated testing situation, compared to voles that were consistently less risk-averse in the source population, indicating spatial sorting for risk-taking propensity along the expansion front We suggest that in non-native species under high predation pressure, the ability to develop timid phenotypes may thus represent a fundamental component for range expansions.</span></p>
Bulk tissue versus amino acid carbon stable isotopes to reveal the diet and basal resource use of an invasive rodent
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The timid invasion: Behavioural adjustments and range expansion in a non-native rodent
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Invasive rodent responses to experimental and natural hurricanes with implications for global climate change
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Data from: Cascading effects of earthworm invasion in tundra increase graminoid density and rodent grazing intensities
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Supplementary material 3 from: Duron Q, Cornulier T, Vidal E, Bourguet E, Ruffino L (2020) Combining live and lethal trapping to inform the management of alien invasive rodent populations in a tropical montane forest. NeoBiota 63: 101-125. https://doi.org/10.3897/neobiota.63.53811
Mean distances (± se) of trapped rats from the edge of the removal area during the four trapping sessions
Supplementary material 4 from: Duron Q, Cornulier T, Vidal E, Bourguet E, Ruffino L (2020) Combining live and lethal trapping to inform the management of alien invasive rodent populations in a tropical montane forest. NeoBiota 63: 101-125. https://doi.org/10.3897/neobiota.63.53811
Distances (in meters) travelled between rats' home range centers in the CMR area and their recapture in the removal area for 27 individuals
Data from: Invasion genetics of a human commensal rodent: the black rat Rattus rattus in Madagascar
Studies focusing on geographical genetic patterns of commensal species and on human history complement each other, and provide proxies to trace common colonisation events. On Madagascar, the unintentional introduction and spread of the commensal species Rattus rattus by people may have left a living clue of human colonization patterns and history. In this study, we addressed this question by characterising the genetic structure of natural populations of R. rattus using both microsatellites and mitochondrial sequences, on an extensive sampling across the island. Such datasets were analysed by a combination of methods using population genetics, phylogeography and Approximate Bayesian Computation. Our results indicated two different introduction events to Madagascar from the same ancestral source of R. rattus, one in the extreme north of the island and the other further south. The latter was the source of a large spatial expansion, which may have initially started from an original point located on the southern coast. The inferred timing of introduction events – several centuries ago - is temporally congruent with the Arabian trade network in the Indian Ocean, which was flourishing from the middle of the first millennium.
Data from: Contemporary variations of immune responsiveness during range expansion of two invasive rodents in Senegal
Biological invasions provide unique opportunities for studying life history trait changes over contemporary time scales. As spatial spread may be related to changes in parasite communities, several hypotheses (such as the evolution of increased competitive ability (EICA) or EICA-refined hypotheses) suggest immune changes in invasive species along invasion gradients. Although native hosts may be subject to similar changes in parasite selection pressures, their immune responses have been rarely investigated in invasion contexts. In this study, we evaluated immune variations for invasive house mice Mus musculus domesticus, invasive black rats Rattus rattus and native rodents Mastomys erythroleucus and Mastomys natalensis along well-characterised invasion gradients in Senegal. We focused on antibody-mediated (natural antibodies and complement) and inflammatory (haptoglobin) responses. One invasion route was considered for each invasive species, and environmental conditions were recorded. Natural-antibody mediated responses increased between sites of long-established invasion and recently invaded sites only in house mice. Both invasive species exhibited higher inflammatory responses at the invasion front than in sites of long-established invasion. The immune responses of native species did not change with the presence of invasive species. These patterns of immune variations do not support the EICA and EICA refined hypotheses, and they rather suggest a higher risk of exposure to parasites on the invasion front. Altogether, these results provide a first basis to further assess the role of immune changes in invasion success.
Building an eDNA surveillance toolkit for invasive rodents on islands: Can we detect wild-type and gene drive Mus musculus?
<p>R code, data, and qPCR efficiencies for experiments related to this paper.</p>
Data from: Tracing the diversification history of a Neogene rodent invasion into South America
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Data from: Contemporary variations of immune responsiveness during range expansion of two invasive rodents in Senegal
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Data from: Invasion genetics of a human commensal rodent: the black rat Rattus rattus in Madagascar
Open the record for dataset details and reuse information.
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