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144 results for “nest predation”
Remotely sensed forest understory density and nest predator occurrence interact to predict suitable breeding habitat and the occurrence of a resident boreal bird species
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Video of nest predation of an African Paradise Flycatcher (Terpsiphone viridis) by an Olive Sunbird (Cyanomitra olivacea)
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Data from: Nest predation predicts infanticide in a cooperatively breeding bird
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Data from: Upland rush management advocated by agri-environment schemes increases predation of artificial wader nests
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Conspecific brood parasitism and nest predation in moorhens
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Population decline of a long-distance migratory passerine at the edge of its range: nest predation, nest replacement, and immigration
<p class="CxSpFirst">The relative importance of predators and resources (i.e., food) for the dynamics of migratory bird populations is poorly known. Resource availability may be more likely in resource poor environments, but given that nest failure in most systems is due mainly to predation, predator effects may predominate. We document a rapid decline of an isolated Eastern Kingbird (<i>Tyrannus tyrannus</i>) population breeding in the Great Basin Desert of eastern Oregon, USA, and evaluate whether it was driven by limited food resources (water availability ~ food), nest predation, or first-year or adult return rate (RR<sub>J</sub> and RR<sub>A</sub>, respectively) that reflect nonbreeding season events. Most nests failed (~68% of nests) due mainly to nest predation (>90% of failures); nestling starvation was rare. Bioyear precipitation (October-April), breeding season precipitation, and river flow all varied widely but none could account for annual variation in either nest success (NS) or fledging success of successful nest (FSSN). Neither RR<sub>J</sub> nor RR<sub>A</sub> varied with year, any measure of water resources, or reproductive success. Annual population growth rate (ln[N<sub>t+1</sub>/N<sub>t</sub>]) was independent of year, all measures of water availability, RR<sub>J</sub> and RR<sub>A</sub>, and NS of replacement nests, but was high following years of high NS of initial nests; FSSN was also higher in years of high NS. High rates of nest predation, due likely to the expansion of the local American Crow (<i>Corvus brachyrhynchos</i>) population, appeared to drive the population decline. Empirical data and population simulations indicated that replacement nests contributed little to λ, while simulations revealed that, given site-specific vital rates, the decline would have been even greater without immigration (λ = 0.812) than the observed (λ = 0.914). Long distance dispersal may thus be critical for persistence of kingbirds in the naturally highly fragmented habitat that it occupies in the Great Basin Desert.</p>
Data from: Nest predation and climate change as drivers of alternative reproductive tactics in a migratory species
<p>Alternative reproductive tactics enable individuals to choose a reproductive tactic relative to their status and prevailing environmental conditions in a way that increases their fitness. Conspecific brood parasitism, in which females lay eggs in nests of conspecifics, is one example of such behaviour. It has been proposed that when prospects for successful nesting are low and/or costs of reproduction are high, females employ tactics of low cost such as non-breeding and parasitic laying. When environmental conditions are ideal and prospects for success high, females can increase their reproductive effort above typical nesting by laying parasitic eggs prior to initiating their own nest. </p>
Carcasses attract invasive species and increase artificial nest predation in a desert environment
<p><span><span>In addition to feeding on animal remains, many scavengers also function as predators. Carcasses may therefore affect local animal communities by attracting facultative scavengers and increasing predation risk for other species in the vicinity of the carcasses. This risk may be elevated in low productivity environments, especially where humans increase carcass production and where facultative scavengers include </span>invasive species. In June and October 2018, we monitored experimentally placed red kangaroo (</span><em>Osphranter rufus</em>) carcasses and artificial bird nests in two different habitats in the Simpson Desert, Australia, to identify the nest predators attracted to the carcasses, and to determine how carcasses affect overall and predator-specific nest predation. We modelled our nests to approximate those of the ground nesting little buttonquail (<em>Turnix velox</em>) and the endangered night parrot (<em>Pezoporus occidentalis</em>). Native <em>Corvus</em> spp. and then invasive red foxes (<span><em>Vulpes vulpes</em></span>) were the top carcass visitors and nest egg predators. Carcass presence and open habitat increased overall nest predation and fewer artificial parrot nest eggs were depredated compared to those of quail. Open habitat and carcass presence only increased predator-specific nest predation by foxes, but corvid nest predation was highest in June 2018, and for the artificial quail nest types. Foxes were the main predator of eggs from night parrot nests. Our study shows that carcass provisioning by humans may have indirect, deleterious effects on ground nesting birds, and indicates that foxes might pose a greater threat to night parrot populations than previously recognised.</p>
Figure 1 in Predation by white-fronted capuchin monkeys, Cebus albifrons on eggs of three species of freshwater turtles in Brazilian Amazonia: solitary nests are also depredated
Figure 1. The location of Jaú National Park, within Brazil, and of the study site within the park.
Data from: Plasticity of snowy plover incubation behaviors in response to risks of nest predation
<p>Nest predation influences population dynamics and is thought to exert strong selection on the evolution of avian life history. Because parental behaviors can attract the attention of nest predators, incubating birds are predicted to decrease conspicuous behaviors at the nest-site and increase incubation constancy when risks of nest predation are high. We examined whether snowy plovers Charadrius nivosus responded to predator-specific risks of nest predation, using the number of off bouts and daily nest attendance (proportion of time spent incubating) as responses. We quantified risks using predator-specific hazard rates of nest mortality, which varied daily and were based on habitat characteristics at each nest. We assessed the influence of predator-specific risks of nest mortality on incubation behaviors using an individual-centering approach, allowing us to explain variation in incubation behaviors within and among breeding pairs. We found increased number of off bouts and nest attendance within breeding pairs in response to increasing risks of nest predation by foxes (Vulpes spp.) and gulls (Larus spp.), but not coyotes (Canis latrans) and common ravens (Corvus corax). Among breeding pairs across habitats, we found increased nest attendance in response to higher risks of nest predation by foxes, but not coyotes, gulls, or ravens. Breeding pairs differed in the amount of behavioral plasticity they exhibited in response to risks of nest predation. Our results suggest that risks of nest predation differentially influence behavioral responses of snowy plovers depending on the predator species, and the amount of behavioral plasticity may depend on characteristics of breeding adults.</p>
Figures 1-4 from: Ribeiro-Silva L, Perrella DF, Biagolini-Jr CH, Zima PVQ, Piratelli AJ, Schlindwein MN, Galetti-Jr PM, Francisco MR (2018) Use of camera traps for detecting nest predation of birds in the Atlantic Forest of Brazil. Zoologia 35: 1-8. https://doi.org/10.3897/zoologia.35.e14678
Figures 1-4 Predators of bird nests recorded with camera traps in an area of Atlantic rainforest. (1) the Collared Forest-falcon, Micrastur semitorquatus, depredating a nest of the White-necked Thrush, Turdus albicollis. (2) the Red-breasted Toucan, Ramphastos dicolorus, depredating a nest of the Ruddy Quail-dove, Geotrygon montana. (3) the Ocelot, Leopardus pardalis, depredating a nest of the Gray-hooded Flycatcher, Mionectes rufiventris. (4) the Gray Slender Mouse Opossum, Marmosops incanus depredating a nest of the Royal Flycatcher, Onychorhynchus swainsoni.
Figure 2 in Nest-site microhabitat association of red-billed leiothrix in subtropical fragmented forest in central China: evidence for a reverse edge effect on nest predation risk?
Figure 2. Nest sites of red-billed leiothrix (a) in the forest and (b) in the scrub-grassland.
Data from: Plasticity of snowy plover incubation behaviors in response to risks of nest predation
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Data from: Male reproductive adjustments to an introduced nest predator
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Carcasses attract invasive species and increase artificial nest predation in a desert environment
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Data from: Higher nest predation favors rapid fledging at the cost of plumage quality in nestling birds
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Data from: Hypoxia increases the risk of egg predation in a nest-guarding fish
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Population decline of a long-distance migratory passerine at the edge of its range: nest predation, nest replacement, and immigration
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Data from: Nest predation and climate change as drivers of alternative reproductive tactics in a migratory species
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Data from: Daily nest predation rates decrease with body size in passerine birds
<p>Body size evolution is generally framed by the benefits of being large, while costs are largely overlooked. An important putative cost of being large is the need to extend development periods, which should increase exposure to predation and potentially select against larger size. In birds, this selection pressure can be important because predation is the main source of offspring mortality and predators should more readily detect the larger nests associated with larger body sizes. Here, we show for diverse passerine birds across the world that, counter to expectations, larger species suffer lower daily nest predation rates than smaller species. This pattern is consistent despite latitudinal variation in predation and does not seem to reflect a tendency of larger species to use more protected nests or less exposed nest locations. Evidence instead suggests that larger species attack a wider array of predator sizes, which could reduce predation rates at nests of large-bodied species. Regardless of the mechanism, the lower daily nest predation rates of larger species yield slightly lower predation rates over the entire development period compared to smaller species. These results highlight the importance of behavior as a mechanism to alter selection pressures, and have implications for body size evolution.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.