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48 results for “nest size”
Data from: Nest size is predicted by female identity and the local environment in the blue tit, but is not related to genetic or foster mother's nest size
The potential for animals to respond to changing climates has sparked interest in intraspecific variation in avian nest structure since this may influence nest microclimate and protect eggs and offspring from inclement weather. However, there have been relatively few large-scale attempts to examine variation in nests or the determinates of individual variation in nest structure within populations. Using a set of mostly pre-registered analyses, we studied potential predictors of variation in the size of a large sample (803) of blue tit (Cyanistes caeruleus) nests across three breeding seasons at Wytham Woods, UK. Whilst our pre-registered analyses found that individual females built very similar nests across years, there was no evidence in follow-up (post hoc) analyses that their nest size correlated to that of their genetic mother or, in a cross-fostering experiment, to the nest where they were reared. In further pre-registered analyses, spatial environmental variability explained nest size variability at relatively broad spatial scales, and especially strongly at the scale of individual nestboxes. Our study indicates that nest structure is a characteristic of individuals, but is not strongly heritable, indicating that it will not respond rapidly to selection. Explaining the within-individual and within-location repeatability we observed requires further study.
Data from: Nest-box temperature affects clutch size, incubation initiation, and nestling health in great tits
Prenatal maternal effects can be a source of phenotypic plasticity and may play a role in adaptation to climate change. However, we do not know how far temperature could influence such effects, if at all. We studied the influence of temperature during egg laying on maternal reproductive investment and on the phenotype of adult females, adult males, and nestlings. We expected temperature to have an effect, as it influences maintenance costs for females, who can also use it as a cue of the advancement of the breeding season. We experimentally increased night-time nest-box temperatures by approximately 1 °C throughout the entire laying period in great tits (Parus major). Clutch size was negatively correlated with laying date in heated females. Heated females did not delay incubation after clutch completion as frequently as control females did. Finally, blood sedimentation rate, which is an indicator of acute infections and inflammatory diseases, was positively correlated with hatching date in control broods. This suggests that nestlings were of lower quality in late-hatched broods than in early-hatched broods. This seasonal effect was not detected in heated nests. Our results show that a small increase in temperature during laying can influence breeding strategy and nestling characteristics. These results suggest that birds used temperature as a cue of seasonal advancement to adjust breeding phenology, with beneficial effects on nestling health. To better understand the consequences of maternal adjustments during egg laying, it would be interesting to combine studies with heating treatment during different periods of the breeding cycle.
Data for: Long duration advertisement calls of nesting male plainfin midshipman fish are honest indicators of size and condition
<p>The plainfin midshipman fish (Porichthys notatus) has long served as a model organism for neuroethology research on acoustic communication and related social behaviors. Type I or 'singing' males produce highly stereotyped, periodic advertisement calls that are the longest known uninterrupted vertebrate vocalizations. Despite the extensive literature on the acoustic behaviour of this species, it remains unclear whether reproductive males signal their quality via their highly energetic, multiharmonic advertisement calls. Here, we recorded the advertisement calls of 22 reproductive type I males at night in a controlled laboratory setting in which males were housed in aquaria maintained at a constant temperature (13.9±0.3°C). The duration of the advertisement calls from type I males was observed to increase from the first call of the night to the middle call after which call duration remained steady until the early morning hours and first light. A strong positive correlation was observed between loudness (sound pressure level and maximum sound pressure level) of the advertisement call and body size (mass and standard length; rs>0.8). In addition, an asymptotic relationship was observed between the harmonic frequencies (f0–f10) of the advertisement calls and male body condition, with harmonic frequencies initially increasing with body condition indices, but then plateauing when body condition measures were high. Taken together, our results suggest that type I male advertisement calls provide reliable honest information about male quality regarding size and body condition. Such condition-dependent information of calling males could potentially be used by receptive females to help facilitate mate choice decisions.</p>
Estimation of worker population size-density by nest counting in the Asian weaver ant, Oecophylla smaragdina (Hymenoptera: Formicidae) and it's dynamic in oil palm plantations industry
<p>Supplementary material-information supporting the article of research related to the Asian weaver ant population size-density in the oil palm plantations. The findings suggested an abundant numerical amount of individual workers per colony. The weaver ant were self-sustainable surviving during long years i.e. more than 20 years. This is the first study carried out on a large scale in oil palm plantation directly in the field by gathering only empirical data and monitor the population dynamic on a long term basis. </p>
Data from: Nest-box temperature affects clutch size, incubation initiation, and nestling health in great tits
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Data from: Timber harvest and tree size near nests explains variation in nest site occupancy but not productivity in northern goshawks (Accipiter gentilis)
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Data from: Do small swarms have an advantage when house hunting? The effect of swarm size on nest-site selection by Apis mellifera
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Data from: Fitness in invasive social wasps: the role of variation in viral load, immune response and paternity in predicting nest size and reproductive output
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Data for: Long duration advertisement calls of nesting male plainfin midshipman fish are honest indicators of size and condition
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Data from: Nest size is predicted by female identity and the local environment in the blue tit, but is not related to genetic or foster mother's nest size
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Structural size measurements and isotopic signatures of foraging among adult male and female Adélie penguins (Pygoscelis adeliae) nesting along the Palmer Archipelago near Palmer Station, 2007-2009
Sexual segregation in vertebrate foraging niche is often associated with sexual size dimorphism (SSD), i.e., ecological sexual dimorphism. We examined ecological sexual dimorphism among sympatric nesting Pygoscelis penguins near Palmer Station, Antarctica, asking whether environmental variability in the form of winter sea ice is associated with differences in male and female pre-breeding foraging niche. Each season, study nests, where pairs of adults were present, were individually marked and chosen before the onset of egg-laying, and consistently monitored. When study nests were found at the one-egg stage, both adults were captured to obtain blood samples used for molecular sexing and stable isotope analyses, and measurements of structural size and body mass. At the time of capture, each adult penguin was quickly blood sampled (~1 ml) from the brachial vein. After handling, individuals at study nests were further monitored to ensure the pair reached clutch completion, i.e., two eggs. Molecular analyses were conducted at Simon Fraser University following standard PCR protocols, and stable isotope analyses were conducted at the Stable Isotope Facility at the University of California, Davis using an elemental analyzer interfaced with an isotope ratio mass spectrometer
Structural size measurements and isotopic signatures of foraging among adult male and female gentoo penguins (Pygoscelis papua) nesting along the Palmer Archipelago near Palmer Station, 2007-2009
Sexual segregation in vertebrate foraging niche is often associated with sexual size dimorphism (SSD), i.e., ecological sexual dimorphism. We examined ecological sexual dimorphism among sympatric nesting Pygoscelis penguins near Palmer Station, Antarctica, asking whether environmental variability in the form of winter sea ice is associated with differences in male and female pre-breeding foraging niche. Each season, study nests, where pairs of adults were present, were individually marked and chosen before the onset of egg-laying, and consistently monitored. When study nests were found at the one-egg stage, both adults were captured to obtain blood samples used for molecular sexing and stable isotope analyses, and measurements of structural size and body mass. At the time of capture, each adult penguin was quickly blood sampled (~1 ml) from the brachial vein. After handling, individuals at study nests were further monitored to ensure the pair reached clutch completion, i.e., two eggs. Molecular analyses were conducted at Simon Fraser University following standard PCR protocols, and stable isotope analyses were conducted at the Stable Isotope Facility at the University of California, Davis using an elemental analyzer interfaced with an isotope ratio mass spectrometer
Structural size measurements and isotopic signatures of foraging among adult male and female Chinstrap penguins (Pygoscelis antarcticus) nesting along the Palmer Archipelago near Palmer Station, 2007-2009
Sexual segregation in vertebrate foraging niche is often associated with sexual size dimorphism (SSD), i.e., ecological sexual dimorphism. We examined ecological sexual dimorphism among sympatric nesting Pygoscelis penguins near Palmer Station, Antarctica, asking whether environmental variability in the form of winter sea ice is associated with differences in male and female pre-breeding foraging niche. Each season, study nests, where pairs of adults were present, were individually marked and chosen before the onset of egg-laying, and consistently monitored. When study nests were found at the one-egg stage, both adults were captured to obtain blood samples used for molecular sexing and stable isotope analyses, and measurements of structural size and body mass. At the time of capture, each adult penguin was quickly blood sampled (~1 ml) from the brachial vein. After handling, individuals at study nests were further monitored to ensure the pair reached clutch completion, i.e., two eggs. Molecular analyses were conducted at Simon Fraser University following standard PCR protocols, and stable isotope analyses were conducted at the Stable Isotope Facility at the University of California, Davis using an elemental analyzer interfaced with an isotope ratio mass spectrometer
Fig. 1 in Growth and nest hole size preferences in immature southern house spiders (Araneae: Filistatidae): Are they constrained consumers?
Fig. 1. Photograph showing "wooly" webs of 2 small and one large Kukulcania hibernalis radiating from nest holes on side of a wooden barn at the Archbold Biological Station, Lake Placid, Florida. Scale bar (lower lef): 5 cm.
Fig. 2 in Growth and nest hole size preferences in immature southern house spiders (Araneae: Filistatidae): Are they constrained consumers?
Fig. 2. Scale drawing of clear plastic test chamber. An immature Kukulcania hibernalis introduced through the hole in the top could choose to nest in any one of 4 different size holes drilled in wooden dowels (1.9 cm diam.) protruding into the chamber.
Census data of growth, mortality and size stage transitions of nests of leaf-cutting ant species before and after fires
<p>We hypothesized that fires will affect more the species that build external, easily flammable thatch mounds with superficial fungal gardens (<i>Acromyrmex lobicornis</i>) than colonies that build subterranean nests in the less-flammable bare-ground (<i>Acromyrmex striatus</i>). We use a stochastic matrix demographic model parameterized with 4 years of data in pre and post fire scenarios. This data set contain all the census data which from we build the matrix models.</p>
Figure 2 in Size of nest complexes, the size of anthills, and infrastructure development in 4 species wood ants (Formica rufa, F. polyctena, F. aquilonia, F. lugubris) (Hymenoptera;
Figure 2. Fragment of a map of the nest complex of red wood ants on the territory of Kyiv and Kyiv region. Anthills are marked with yellow circles. The symbols in the circles represent the size classes of the anthills.
Figure 5 in Size of nest complexes, the size of anthills, and infrastructure development in 4 species wood ants (Formica rufa, F. polyctena, F. aquilonia, F. lugubris) (Hymenoptera;
Figure 5. Average number of trails depending on anthill status in F. rufa (5A) and F. polyctena (5B) (single or colonial, from 2 to 51 and more anthills), Kyiv and region, Ukraine.
Figure 3 in Size of nest complexes, the size of anthills, and infrastructure development in 4 species wood ants (Formica rufa, F. polyctena, F. aquilonia, F. lugubris) (Hymenoptera;
Figure 3. Average diameter and height (in meters, m) of nests of red wood ants from different locations: Diameter (3A) and height (3B) of Formica lugubris, F. aquilonia, F. polyctena anthills, included in nest complexes (c). Ur - Ural, Irk - Irkutsk (Cis-Baikal, Russia). Diameter (3C) and height (3D) of F. rufa, F. polyctena anthills, Kyiv and Kyiv region (Ukraine), c - colonial forms (nest complexes), s - single anthills. Legend in Figures 2–5. "Whiskers" vertical lines within color-filled areas include Whisker length (one sigma), mean (horizontal line across the box) and standard error of mean, color-filled boxes up and down from the vertical line indicate the variability of the mean, quartile method - interpolation; in violins filled regions are colored.
Nest microhabitats and tree size mediate shifts in ant community structure across elevation in tropical rainforest canopies
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Allen Brain Atlas
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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
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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
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