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199 results for “Nestling”
Complete datasets and code for "Hungry or angry? Experimental evidence for the effects of food availability on two measures of stress in developing wild raptor nestlings"
<p><strong>Abstract</strong></p> <p>Food shortage challenges the development of nestlings; yet, to cope with this stressor, nestlings can induce stress responses to adjust metabolism or behaviour. Food shortage also enhances the antagonism between siblings, but it remains unclear whether the stress response induced by food shortage operates via the individual nutritional state or via the social environment experienced. In addition, the understanding of these processes is hindered by the fact that effects of food availability often co-vary with other environmental factors. We used a food supplementation experiment to test the effect of food availability on two complementary stress measures, feather corticosterone (CORTf) and Heterophil/Lymphocyte-ratio (H/L) in developing red kite (Milvus milvus) nestlings, a species with competitive brood hierarchy. By statistically controlling for the effect of food supplementation on the nestlings’ body condition, we disentangled the effects of food and ambient temperature on nestlings during development. Experimental food supplementation increased body condition, and both CORTf and H/L were reduced in nestlings of high body condition. Additionally, CORTf decreased with age in non-supplemented nestlings. H/L decreased with age in all nestlings and was lower in supplemented last-hatched nestlings compared to non-supplemented ones. Ambient temperature showed a negative effect on H/L. Our results indicate that food shortage increases the nestlings’ stress levels through both, a reduced food intake affecting nutritional state and the nestlings’ social environment. Thus, food availability in conjunction with ambient temperature shape between- and within nest differences in stress load, which may have carry-over effects on behaviour and performance in further life-history stages.</p>
Lapland longspur and Gambel's white crowned sparrow egg and nestling survival near Toolik Field Station, Alaska, summers 2012-2016
This data set contains information about the daily status (alive/ dead) of Lapland longspur and Gambel's white-crowned sparrow eggs and nestlings studied near Toolik Field Station from 2012 to 2016 under National Science Foundation (NSF) Office of Polar Programs ARC 0908444 (to Laura Gough), ARC 0908602 (to Natalie Boelman), and ARC 0909133 (to John Wingfield). It is associated with publication DOI: 10.1111/jav.01712.
Fig. 7. Box plots comparing average counts per 10 in Trypanosomiasis: An emerging disease in Alpine swift (Tachymarptis melba) nestlings in Switzerland?
Fig. 7. Box plots comparing average counts per 10 HPF of granulocytes, mononuclear cells, and thrombocytes between positive (n = 20) and negative (n = 20) 45- day-old Alpine swift nestlings sampled in 2022.
Fig. 5 in Trypanosomiasis: An emerging disease in Alpine swift (Tachymarptis melba) nestlings in Switzerland?
Fig. 5. Skeletal musculature of a nestling Alpine swift showing infiltrations of mononuclear inflammatory cells (A, B) and presumably extracellular, amastigote-like structures (C). Bursa fabricii of a nestling Alpine swift with depletion of the medullary follicle with lymphocytolysis (asterisk) and a distinct epithelium (arrows) (D).
Fig. 6 in Trypanosomiasis: An emerging disease in Alpine swift (Tachymarptis melba) nestlings in Switzerland?
Fig. 6. Blood smears of nestling Alpine swifts with high (A) and moderate (B) trypomastigote burdens. Close-up of a trypomastigote between erythrocytes (C).
Fig. 4 in Trypanosomiasis: An emerging disease in Alpine swift (Tachymarptis melba) nestlings in Switzerland?
Fig. 4. Distribution of louse flies on an Alpine swift nestling (A) compared with the distribution of bruising on post-mortem examination with plumage removed (B).
Fig. 3 in Trypanosomiasis: An emerging disease in Alpine swift (Tachymarptis melba) nestlings in Switzerland?
Fig. 3. Missing (left wing) and poor quality (right wing) primary feathers on a 45-day-old nestling.
Fig. 1 in Trypanosomiasis: An emerging disease in Alpine swift (Tachymarptis melba) nestlings in Switzerland?
Fig. 1. Map of Switzerland with the locations and appearance of the three evaluated colonies (A, B, C).
Fig. 1 in Morphological Differentiation In Nestlings Turdus Philomelos (Passeriformes, Turdidae) And Staging In Their Development During The Nestling Period Of Postembryogenesis
Fig. 1. Dynamics of changes in 12 morphometric traits in nestlings during the nesting stage of postembryogenesis (from 1 to 14 days), the stage of fast growth (from 1 to 8 days) and of slow growth (from 8 to 14 days).
Can diet composition estimates using stable isotope analysis of feathers predict growth and condition in nestling mountain bluebirds (Sialia currucoides)
<p>Insectivorous birds breeding in seasonal environments provision their dependent young during periods when prey diversity and abundance vary. Consequently, the composition and nutritional value of diets parents feed to their offspring may differ within and among broods, potentially affecting the condition of nestlings. In a population of mountain bluebirds (<i>Sialia currucoides</i>), we used two methods to estimate diet composition for individual nestlings: direct observation of provisioning using video recordings at 5 and 9 days post-hatch, and stable isotopes of the δ<sup>13</sup>C and δ<sup>15</sup>N in nestling feathers and prey followed by analysis with mixing models. We determined the macronutrient content (% fat and lean mass) and estimated the metabolized energy from each type of prey. We evaluated whether different methods of estimating diet composition would produce similar results, and if the types of prey nestlings ate at one or both ages affected their morphology, growth rates, or blood ketone concentration. We found that bluebirds fed their young 5 main types of prey: beetles, cicadas, grasshoppers, insect larvae, and spiders. Both observational and mixing model estimates of diet composition indicated that larvae are traded-off with grasshoppers, and that fewer larvae are provided to nestlings as the season progresses. In evaluating how diet influences individual growth and condition, estimates from direct observations had greater explanatory power than those from mixing models, indicating that diets rich in the most energy-dense prey (greatest fat content; cicadas and larvae) were associated with larger size and higher body condition, and faster rate of mass gain and growth of tarsus. Lower value prey had more limited, specific effects on nestlings, but may still be important dietary components. While isotopic methods produced estimates of diet composition that were generally informative, when applied to explain the growth and condition of nestlings they proved less useful. </p>
Figure 2 in The nest, nestlings and morphometrics of Sapphire-spangled Emerald Amazilia lactea bartleti
Figure 2. Nest of Sapphire-spangled Emerald Amazilia lactea bartleti with two nestlings on a horizontal branch of Tectona grandis: (A) outer nest wall showing lichen ornamentation; (B) dorsal view of nest with recently hatched nestlings (2–3 days old); (C–D) dorsal and ventral views of a nestling on the day it was found (23 March 2017); (E) feathered nestlings on 30 March 2017; (F) nestling on the day it was banded (4 April 2017) (Edson Guilherme)
Figure 1 in The nest, nestlings and morphometrics of Sapphire-spangled Emerald Amazilia lactea bartleti
Figure 1. Nests of Sapphire-spangled Emerald Amazilia lactea bartleti and floral resources at the Campus and Zoobotanical Park of the Universidade Federal do Acre, Rio Branco, Brazil: (A) nest constructed on a mango Mangifera indica tree, with two nestlings, 3 March 2013; (B) the same nest from above, 5 March 2013; (C) adult female collecting Monotagma sp. nectar for the nestlings depicted in A and B; (D–E) flowers of Costus sp. and Hibiscus rosa‐sinensis, respectively, where the adult female collected nectar to feed the nestlings depicted in photos A and B; (F) nest found on 8 December 2015 with an adult female incubating eggs (A–E: Jônatas Lima; F: Edson Guilherme)
Figure 1 in The nest, eggs and nestling development of Fork-tailed Woodnymph Thalurania furcata boliviana
Figure 1. Nest, eggs and nestlings of Fork-tailed Woodnymph Thalurania furcata boliviana in south-west Brazilian Amazonia: (A) female incubating the eggs; (B) view of the nest showing the eggs; (C) nestlings with feathers growing on all body tracts; (D) feathered nestlings; (E) one of the nestlings the day prior to fledging (A, B and D: Edson Guilherme; C and E: Jônatas Lima)
Figure 3 in The nest, eggs and nestling development of Fork-tailed Woodnymph Thalurania furcata boliviana
Figure 3. Mass gain of Fork-tailed Woodnymph Thalurania furcata boliviana nestlings in Acre, Brazil, over the development period (measurements taken every two days between 14 January and 1 February 2016).
Рис. 3. «ГуΑки» самцов (1) и птенцов (2): a — I. sinensis; b — гибриΑных птиц 2007 г.; c — гибриΑных птиц 2010 г. Fig. 3. "Beeps" of males (1) and nestlings (2): a — I. sinensis; b — hybrid birds 2007; c — hybrid birds 2010 in Call repertoire of Bitterns Ixobrychus in Russian Far East
Рис. 3. «ГуΑки» самцов (1) и птенцов (2): a — I. sinensis; b — гибриΑных птиц 2007 г.; c — гибриΑных птиц 2010 г. Fig. 3. "Beeps" of males (1) and nestlings (2): a — I. sinensis; b — hybrid birds 2007; c — hybrid birds 2010
Рис. 6. Контактно-тревожная позывка «перекΛичка» птенцов I. sinensis (a) и гибриΑных птиц (b) Fig. 6. Contact-alarm call "roll call" of I. sinensis nestlings (a) and hybrid birds (b) in Call repertoire of Bitterns Ixobrychus in Russian Far East
Рис. 6. Контактно-тревожная позывка «перекΛичка» птенцов I. sinensis (a) и гибриΑных птиц (b) Fig. 6. Contact-alarm call "roll call" of I. sinensis nestlings (a) and hybrid birds (b)
Рис. 5. Контактно-пищевая позывка «мяуканье» (1) и пищевое «шипение» (2) птенцов: a — I. eurythmus; b — I. sinensis; c — гибриΑных птиц Fig. 5. Contact-food "meow" call (1) and food "hissing" (2) of nestlings: a — I. eurythmus; b — I. sinensis; c — hybrid birds in Call repertoire of Bitterns Ixobrychus in Russian Far East
Рис. 5. Контактно-пищевая позывка «мяуканье» (1) и пищевое «шипение» (2) птенцов: a — I. eurythmus; b — I. sinensis; c — гибриΑных птиц Fig. 5. Contact-food "meow" call (1) and food "hissing" (2) of nestlings: a — I. eurythmus; b — I. sinensis; c — hybrid birds
Рис. 8. Рост и развитие птенцов: a — изменение массы; b — рост частей теΛа; c — рост перьев Fig. 8. Growth and development of nestlings: a — weight change; b — growth of body parts; c — feather growth in in the Ussuri region
Рис. 8. Рост и развитие птенцов: a — изменение массы; b — рост частей теΛа; c — рост перьев Fig. 8. Growth and development of nestlings: a — weight change; b — growth of body parts; c — feather growth
Рис. 10. Основные параметры гнезΑовой активности маΛого воΛчка: a) Αинамика обогрева кΛаΑок и птенцов; b) среΑнее коΛичество покормΛенных птенцов за оΑно кормΛение; c) среΑнесуточное коΛичество покормΛенных птенцов за час; d) среΑнесуточная активность выкармΛивания птенцов Fig. 10. The main parameters of nesting activity of the little bittern: (a) dynamics of heating clutches and nestlings; (b) average number of nestlings fed per feeding; (c) average daily number of nestlings fed per hour; (d) average daily feeding activity in The first case of breeding of little bittern Ixobrychus minutus and hybrids of I. minutus with I. sinensis in the Russian Far East
Рис. 10. Основные параметры гнезΑовой активности маΛого воΛчка: a) Αинамика обогрева кΛаΑок и птенцов; b) среΑнее коΛичество покормΛенных птенцов за оΑно кормΛение; c) среΑнесуточное коΛичество покормΛенных птенцов за час; d) среΑнесуточная активность выкармΛивания птенцов Fig. 10. The main parameters of nesting activity of the little bittern: (a) dynamics of heating clutches and nestlings; (b) average number of nestlings fed per feeding; (c) average daily number of nestlings fed per hour; (d) average daily feeding activity
Figure 1A in Coproparasitological study of European starling nestlings (Sturnus vulgaris) in Argentina
Figure 1A. Sporulated oocyst of Isospora sp. with 2 pear-shaped sporocysts containing 4 sporozoites each.
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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)
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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.