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130 results for “foraging behaviour”
Data from: Urbanization and the temporal patterns of social networks and group foraging behaviours
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Data from: Variability in the movement and foraging behaviour of female Eurasian lynx during the denning season across Europe
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Data from: Age-related variation in non-breeding foraging behaviour and carry-over effects on fitness in an extremely long-lived bird
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Harbour porpoises are flexible predators displaying context dependent foraging behaviours
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Evidence of links between haematological condition and foraging behaviour in Northern gannets (Morus bassanus)
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Predation risk can modify the foraging behaviour of frugivorous carnivores: implications of rewilding apex predators for plant-animal mutualisms
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Foraging behaviour alters with social environment in a juvenile songbird
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Effects of litter quality on foraging behaviour and demographic parameters in Folsomia candida (Collembola)
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Modelled mid‐trophic pelagic prey fields improve understanding of marine predator foraging behaviour
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Data from: Development of flight and foraging behaviour in a juvenile seabird with extreme soaring capacities
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Figure 6 in Home rangeı population densityı and foraging behaviour of the Yellow-breasted Warbling-Antbird (Hypocnemis subflava) in forest fragments in southwestern Brazilian Amazonia
Figure 6. Probability of occurrence of the Yellow-breasted Warbling-Antbird (Hypocnemis subflava) in relation to: (a) total bamboo culm density; (b) density of live culms; (c) density of dead culms; (d) percentage bamboo cover, and (e) mean height of the bamboo patch. Bamboo densities are shown as the number of culms per hectare. Each datapoint represents 1 – ha plot: squares = Zoobotanical Park, circles = Catuaba Experimental Farm, Triangles = Humaitá Forest Reserve.
Figure 1 in Home rangeı population densityı and foraging behaviour of the Yellow-breasted Warbling-Antbird (Hypocnemis subflava) in forest fragments in southwestern Brazilian Amazonia
Figure 1. Location of the three study areas (circled) in eastern Acre, southwestern Brazilian Amazonia, in which the grids were installed for the monitoring of the Yellow-breasted Warbling-Antbird (Hypocnemis subflava).
Figure 5 in Home rangeı population densityı and foraging behaviour of the Yellow-breasted Warbling-Antbird (Hypocnemis subflava) in forest fragments in southwestern Brazilian Amazonia
Figure 5. Frequency (number of events observed) of foraging by the Yellow-breasted Warbling- Antbird (Hypocnemis subflava) in each height class. The columns show the total number of records and the records for each study site. ZP = Zoobotanical Park; CEF = Catuaba Experimental Farm; HFR = Humaitá Forest Reserve.
Darwin's finch foraging behaviour and naris size
<p>The avian beak is a key morphological trait used for foraging. If parasites alter beak shape, we expect changes in host foraging behaviour. Nestling Darwin's finches on the Galápagos Islands experience naris size enlargement caused by <i>Philornis downsi </i>larvae. We predict (1) altered foraging behaviour in birds with malformed beaks from <i>P. downsi</i>. To test the evolutionary implications of naris malformation, we predict (2) changes in foraging niche overlap between sympatric species, and (3) worse body condition in birds with malformed beaks. Our focal species are small tree finch (<i>Camarhynchus parvulus</i>), medium tree finch (<i>C. pauper</i>), hybrid tree finch (<i>Camarhynchus spp</i>.), and small ground finch (<i>Geospiza fuliginosa</i>) on Floreana Island. With the exception of hybrid finches, Darwin's finch species with malformed beaks exhibited increased surface prey removal and decreased hidden prey extraction during foraging. Naris size enlargement, and different beak size traits per species, was associated with worse body condition in <i>Camarhynchus</i> finches. Divergence can be rapidly undone when introduced parasites alter functional morphological traits that create ecological distinctiveness in species.</p>
Data from: Study on the foraging behaviour of the European nightjar Caprimulgus europaeus reveals the need for a change in conservation strategy in Belgium
Effective nature conservation requires coherent actions based on the best available evidence concerning protected species. Recent studies have suggested that European nightjars Caprimulgus europaeus forage outside their recognized breeding habitats, yet, for Flanders (northern Belgium) information on nightjar foraging behaviour and key foraging habitats is lacking. To assess whether the foraging ecology of nightjars in Flanders is similar to that observed in other parts of Europe, we studied the crepuscular behaviour of this species in Bosland (northeastern Flanders) during a five-year radio telemetry study. Tracking of 48 individuals within a coniferous forest was standardized and home ranges were calculated using a kernel density estimator (fixed kernel). Habitat use was investigated by comparing kernel placement to available habitat. Average maximal foraging distance was 2603 ± 1094 m and home ranges extended up to 691 ha. We identified the key foraging habitats to be extensively-cultivated grasslands and recreational areas, areas that were previously assumed unsuitable for Belgian nightjars. Our results indicate the importance of foraging sites outside the breeding territory, confirming the findings of previous studies performed elsewhere in Europe. Incorporating our findings into future conservation plans could, therefore, lead to improved efficiency of EU conservation measures, designed for the protection of this bird species in Flanders.
Data from: Personality composition is more important than group size in determining collective foraging behaviour in the wild
Describing the factors that shape collective behaviour is central to our understanding of animal societies. Countless studies have demonstrated an effect of group size in the emergence of collective behaviours, but comparatively few have accounted for the composition/diversity of behavioural phenotypes, which is often conflated with group size. Here, we simultaneously examine the effect of personality composition and group size on nest architecture and collective foraging aggressiveness in the social spider Stegodyphus dumicola. We created colonies of two different sizes (10 or 30 individuals) and four compositions of boldness (all bold, all shy, mixed bold and shy, or average individuals) in the field and then measured their collective behaviour. Larger colonies produced bigger capture webs, while colonies containing a higher proportion of bold individuals responded to and attacked prey more rapidly. The number of attackers during collective foraging was determined jointly by composition and size, although composition had an effect size more than twice that of colony size: our results suggest that colonies of just 10 bold spiders would attack prey with as many attackers as colonies of 110 'average' spiders. Thus, personality composition is a more potent (albeit more cryptic) determinant of collective foraging in these societies.
Data from: Combined use of GPS and accelerometry reveals fine scale three-dimensional foraging behaviour in the short-tailed shearwater
Determining the foraging behaviour of free-ranging marine animals is fundamental for assessing their habitat use and how they may respond to changes in the environment. However, despite recent advances in bio-logging technology, collecting information on both at-sea movement patterns and activity budgets still remains difficult in small pelagic seabird species due to the constraints of instrument size. The short-tailed shearwater, the most abundant seabird species in Australia (ca 23 million individuals), is a highly pelagic procellariiform. Despite its ecological importance to the region, almost nothing is known about its at-sea behaviour, in particular, its foraging activity. Using a combination of GPS and tri-axial accelerometer data-loggers, the fine scale three-dimensional foraging behaviour of 10 breeding individuals from two colonies was investigated. Five at-sea behaviours were identified: (1) resting on water, (2) flapping flight, (3) gliding flight, (4) foraging (i.e., surface foraging and diving events), and (5) taking-off. There were substantial intra- and inter- individual variations in activity patterns, with individuals spending on average 45.8% (range: 17.1–70.0%) of time at sea resting on water and 18.2% (range: 2.3–49.6%) foraging. Individuals made 76.4 ± 65.3 dives (range: 8–237) per foraging trip (mean duration 9.0 ± 1.9 s), with dives also recorded during night-time. With the continued miniaturisation of recording devices, the use of combined data-loggers could provide us with further insights into the foraging behaviour of small procellariiforms, helping to better understand interactions with their prey.
Coping with the commute: behavioural responses to wind conditions in a foraging seabird
Movement is a necessary yet energetically expensive process for motile animals. Yet how individuals modify their behaviour to take advantage of environmental conditions and hence optimise energetic costs during movement remains poorly understood. This is especially true for animals that move through environments where they cannot easily be observed. We examined the behaviour during commuting flights of black-legged kittiwakes Rissa tridactyla breeding on Middleton Island, Alaska in relation to wind conditions they face. By simultaneously deploying GPS and accelerometer devices on incubating birds we were able to quantify the timing, destination, course and speed of flights during commutes to foraging patches, as well as how wing beat frequency and strength relate to flight speeds. We found that kittiwakes did not preferentially fly in certain wind conditions. However, once in the air they exhibited plasticity by increasing their air speed (the speed at which they fly relative to the wind) when travelling into headwinds and decreasing their air speed when flying with tailwinds. This strategy maximises flight range, whereby the greatest air distance is covered per unit of energy expenditure. Furthermore, we identified a biomechanical link behind this behaviour: that to achieve these changes in flight speeds, kittiwakes altered their wing beat strength, but not wing beat frequency. Using this information, we demonstrate that the cost of flying into a headwind outweighs the benefit of flying with a tailwind of equivalent speed, therefore exploiting a tailwind when commuting to a foraging patch would not be beneficial if having to return in the same direction with the same conditions. Our findings suggest that extrinsic factors, such as prey availability, have a more influential role in determining when and where birds fly during foraging trips than do wind conditions. However, once flying, kittiwakes exhibit behavioural plasticity to minimise transport costs.
Data from: Linking oceanographic conditions, migratory schedules and foraging behaviour during the non‐breeding season to reproductive performance in a long‐lived seabird
1. Studies of the mechanisms underlying climate-induced population changes are critically needed to better understand and accurately predict population responses to climate change. Long-lived migratory species might be particularly vulnerable to climate change as they are constrained by different climate conditions and energetic requirements during the breeding and non-breeding seasons. Yet, most studies primarily focus on the breeding season of these species lifecycle. Environmental conditions experienced in the non-breeding season may have downstream effects on the other stages of the annual lifecycle. Not investigating such effects may potentially lead to erroneous inferences about population dynamics. 2. Combining demographic and tracking data collected between 2006 and 2013 at Kerguelen Island on a long-lived migratory seabird, the Black-Browed Albatross (Thalassarche melanophris), we investigated the links between sea surface temperature during the non-breeding season and behavioural and phenological traits (at-sea behaviour and migratory schedules) while accounting for different responses between birds of different sex and reproductive status (previously failed or successful breeders). We then explored if variation in the foraging behaviour and timing of spring migration influenced subsequent reproductive performance. 3. Our results showed that foraging activity and migratory schedules varied by both sex and reproductive status suggesting different energetic requirements and constraints among individuals. Higher sea surface temperatures during late winter, assumed to reflect poor winter conditions, were associated with an earlier departure from the wintering grounds and an extended pre-breeding period. However, an earlier spring migration and an earlier return to Kerguelen grounds were associated with a lower breeding success. 4. Our results highlighted that behaviour during some periods of the non-breeding season, particularly towards the end of the wintering period and the pre-breeding period had a significant effect on the subsequent reproductive success. Therefore, caution needs to be given to all stages of the annual cycle when predicting the influence of climate on population dynamics.
FIGURE 2 in When starvation challenges the tradition of niche conservatism: On a new species of the saxicolous genus Phymaturus from Patagonia Argentina with pseudoarboreal foraging behaviour (Iguania, Liolaemidae)
FIGURE 2. (a) Adult female paratype of Phymaturus agilis in life from Terra Typica, Río Negro, ventral view. Photo: F.O. Tappari, 11-10-2007. (b) Adult of Phymaturus agilis foraging and feeding on a Lycium gillesianum shrub. Photo: Cynthia González, 26-11-2006.
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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.