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41 results for “egg-laying”
Figure 3 in Habitat, egg-laying behaviour, eggs and tadpoles of four sympatric species of Pseudopaludicola (Anura, Leiuperidae)
Figure 3. Left side view of the tadpole of the Pseudopaludicola species studied. (A) Pseudopaludicola saltica, (B) Pseudopaludicola mystacalis, (C) Pseudopaludicola aff. canga, (D) Pseudopaludicola ternetzi. Specimens from Uberlândia, MG, Brazil. Scales 11.5, 9.0, 10.0 and 10.0 mm for A, B, C and D, respectively.
Videos of nest defense against cuckoo egg-laying from 2013 to 2022
<p><span>As the first line of defense in avian brood parasitism, nest defense plays an important role in reducing nest parasitism and increasing host fitness. However, systematic studies on its effectiveness (i.e., on whether it successfully prevents cuckoo parasitism) are lacking. Based on 214 video recordings from 10 years of field observations, we evaluated the effectiveness of nest defenses of the Oriental reed warbler (<em>Acrocephalus</em> <em>orientalis</em>) in deterring common cuckoo (<em>Cuculus</em> <em>canorus</em>) parasitism. The results revealed that, under a breeding pair situation (≤ 2 host individuals), nest defenses of the warbler were hardly effective in resisting the egg-laying behavior of the cuckoo, and many of the cuckoos under attack were able to complete the parasitic process without being harmed. However, when hosts were ≥ 3 host individuals, the trigger value was reached, and the warbler was able to effectively thwart the cuckoo's parasitism and cause lethal damage to the cuckoo. This indicated that the host group was effective in resisting the cuckoo, which fully demonstrates the importance of cooperation and socially transmitted defenses among host neighbors in resisting cuckoo parasitism.</span></p>
Data from: A treefrog with reproductive mode plasticity reveals a changing balance of selection for non-aquatic egg-laying
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Data from: Copy if dissatisfied, innovate if not: contrasting egg-laying decision making in an insect
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Data from: Reprograming of epigenetic mechanisms controlling host insect immunity and development in response to egg-laying by a parasitoid wasp
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Data from: Oviposition site choice under conflicting risks demonstrates that aquatic predators drive terrestrial egg-laying
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Videos of nest defense against cuckoo egg-laying from 2013 to 2022
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Food restriction delays breeding and affects insulin-like growth factor-1, oxidative damage, and haematocrit value before egg-laying in female canaries
<p>Environmental challenges, such as fluctuations in food availability, could influence reproductive investment. If resource availability is poor, individuals need to decide in which life-history process they invest more energy and vital compounds, which determine the cost of reproduction. In resource allocation, the physiological pathways have important roles. The aim of our study was to examine whether food availability influenced physiological traits (insulin-like growth factor-1 (IGF-1) concentration, antioxidant capacity (OXY), level of oxidative damage (ROM) and haematocrit value) prior to egg-laying in female canaries (<i>Serinus canaria</i>). We also tested whether these physiological traits were associated with traits reflecting the reproductive investment in egg macro- (egg mass and yolk mass) and micronutrient content (eggshell biliverdin- and protoporphyrin-based colouration). To test these questions we conducted a food restriction experiment with control and food-restricted (72% of control food) groups. Our study showed that food-restricted canary females delayed egg-laying and the physiological traits differed between the groups. At the pre-laying period, after 9-11 days of treatment, a reduction in plasma IGF-1 concentration, ROM level, and haematocrit value was detected in the control group, whereas in the food-restricted group plasma IGF-1 concentration increased, while ROM level and haematocrit value did not change. Plasma level of OXY was not influenced by treatment or breeding period. Plasma concentration of IGF-1, haematocrit value and oxidative status before egg laying did not affect the egg characteristics. Our study highlights the importance of breeding stage when studying and interpreting the effects of food restriction on physiological traits of breeding birds. Moreover, our data suggest that nutritional limitation had an effect on the timing of egg-laying that could be mediated by changes in physiological variables.</p>
Stable isotope data from: Use of marine vs. freshwater proteins for egg-laying and incubation by sea ducks breeding in Arctic tundra
<p>This data archive contains data used in analyses of protein sources for egg membranes and whole blood of long-tailed ducks (<em>Clangula hyemalis</em>) and Steller's (<em>Polysticta stelleri</em>), spectacled (<em>Somateria fischeri</em>), and king <em>(Somateria spectabilis)</em> eiders. These data have been published in Miller et al. (2022): Use of marine vs. freshwater proteins for egg-laying and incubation by sea ducks breeding in Arctic tundra (Ecosphere).</p>
Data from: Egg-laying environment modulates offspring responses to predation risk in an amphibian
Predator-induced plasticity has been in the focus of evolutionary ecological research in the last decades, but the consequences of temporal variation in the presence of cues predicting offspring environment have remained controversial. This is partly due to the fact that the role of early environmental effects has scarcely been scrutinized in this context while also controlling for potential maternal effects. In this study we investigated how past environmental conditions, i.e. different combinations of risky or safe adult (pre-natal) and oviposition (early post-natal) environments affected offspring's plastic responses in hatching time and locomotor activity to predation risk during development in the smooth newt (Lissotriton vulgaris). We found that females did not adjust their reproductive investment to the perceived level of risk in the adult environment, and this pre-natal environment had generally negligible effect on offspring phenotype. However, when predator cues were absent during oviposition, larvae raised in the presence of predator cues delayed their hatching and exhibited a decreased activity compared to control larvae developing without predator cues, which responses are advantageous when predators pose a threat to hatched larvae. In the presence of predator cues during oviposition, the difference in hatching time persisted,but the difference in general locomotor activity disappeared between risk-exposed and control larvae. Our findings provide clear experimental evidence that fine-scale temporal variation in a predictive cue during and after egg-laying interactively affect offspring phenotype, and highlight the importance of the early post-natal environment, which may exert a substantial influence on progeny's phenotype also under natural conditions.
Food restriction delays breeding and affects insulin-like growth factor-1, oxidative damage, and haematocrit value before egg-laying in female canaries
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Data from: Egg-laying environment modulates offspring responses to predation risk in an amphibian
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Stable isotope data from: Use of marine vs. freshwater proteins for egg-laying and incubation by sea ducks breeding in Arctic tundra
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Transcriptome sequencing reveals key potential long non-coding RNAs related to duration of fertility trait in the uterovaginal junction of egg-laying hens
GEO Series GSE101163. Gallus gallus. 14 samples. Type: Non-coding RNA profiling by high throughput sequencing.
miRNA expression profiling in liver of juvenile and egg-laying hens
GEO Series GSE74242. Gallus gallus. 6 samples. Type: Non-coding RNA profiling by high throughput sequencing.
Fig. 10 in A new giant egg-laying onychophoran (Peripatopsidae) reveals evolutionary and biogeographical aspects of Australian velvet worms
Fig. 10 Phylogenetic relationships among representative onychophorans, including Ooperipatellus nickmayeri sp. nov. Maximum likelihood topology combining the 12S rRNA, 16S rRNA, 18S rRNA and 28S rRNA with COI nucleotide sequences excluding the third codon position. Four
Fig. 2 in A new giant egg-laying onychophoran (Peripatopsidae) reveals evolutionary and biogeographical aspects of Australian velvet worms
Fig. 2 Features associated with male reproductive structures in Ooperipatellus nickmayeri sp. nov. Scanning electron micrographs. In all images, the anterior orientation is at the top of the figure, with posterior at the bottom. a Genital pad in overview. The posterior border of the genital pad appears modified into a conspicuous swollen area (dotted lines) in males of this species. Note the characteristic genital opening of Ooperipatellus, the cruciform opening of which divides the genital pad completely on the transverse but not on the longitudinal axis. b Detail of the modified area of the genital pad. Note the lack of dermal
Fig. 6 in A new giant egg-laying onychophoran (Peripatopsidae) reveals evolutionary and biogeographical aspects of Australian velvet worms
Fig. 6 Head and ventral colour pattern in Ooperipatellus nickmayeri sp. nov. Images of living specimens. In all images, the anterior orientation is at the left of the figure, with posterior at the right. a Head colour pattern. Note the banded antennae and the orange/tan slime papillae. Antennal rings that normally appear orange/tan are numbered according to their
Fig. 1 in A new giant egg-laying onychophoran (Peripatopsidae) reveals evolutionary and biogeographical aspects of Australian velvet worms
Fig. 1 Geographical position and relative size of Ooperipatellus nickmayeri sp. nov. Maps on the left indicate the approximate position (red dot) of the collecting site where the new species was found in Tasmania, Australia. Drawings on the right side represent a comparison to scale of O. nickmayeri sp. nov. (black), reconstructed from photographs of walking
Fig. 9 in A new giant egg-laying onychophoran (Peripatopsidae) reveals evolutionary and biogeographical aspects of Australian velvet worms
Fig. 9 Structures associated with the legs in Ooperipatellus nickmayeri sp. nov. Scanning electron micrographs. In all images, the distal orientation is at the top of the figure, with proximal at the bottom. Spinous pads are numbered from distal to proximal and fragmented pads are delimited by dotted lines. Spineless integumentary fold between the second and third pads is artificially coloured green. a A leg from the midbody. b Detail of the spineless integumentary fold. This
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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.