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358 results for “hatching”
Fig. 6 in The Lecithotrophic Zoea Of Chirostylus Ortmanni Miyake & Baba, 1968 (Crustacea: Anomura: Galatheoidea: Chirostylidae) Described From Laboratory Hatched Material
Fig. 6. Chirostylus ortmanni Miyake & Baba, 1968: a, second pleopod; b, third pleopod; c, fourth pleopod; d, fifth pleopod; e, uropod; f, dorsal view of telson.
Fig. 4 in The Lecithotrophic Zoea Of Chirostylus Ortmanni Miyake & Baba, 1968 (Crustacea: Anomura: Galatheoidea: Chirostylidae) Described From Laboratory Hatched Material
Fig. 4. Chirostylus ortmanni Miyake & Baba, 1968: a, first (chela) pereiopod; b, second pereiopod; c, third pereiopod; d, fourth pereiopod; e, fifth pereiopod.
Text-fig. 8. Line drawings of third molars from the upper part of the Nagri Formation; 8a–b and 8e–g are referred to Karnimata fejfari, 8c and 8h are referred to Progonomys hussaini, and 8d represents Progonomys morganae. a) left m3 YGSP 34573, b) right m3 YGSP 34568, c) right m3 YGSP 34574, d) left M3 YGSP 34033 from Y 259, e) right M3 YGSP 34595, f) right M3 YGSP 34596, g) right M3 YGSP 33197 from Y 450, h) right M3 YGSP 34597. All teeth drawn to same scale, anterior is upward; black shading represents dentine exposed by wear; hatching on 8d represents breakage. in Early Late Miocene Murine Rodents From The Upper Part Of The Nagri Formation, Siwalik Group, Pakistan, With A New Fossil Calibration Point For The Tribe Apodemurini (Apodemus/Tokudaia)
Text-fig. 8. Line drawings of third molars from the upper part of the Nagri Formation; 8a–b and 8e–g are referred to Karnimata fejfari, 8c and 8h are referred to Progonomys hussaini, and 8d represents Progonomys morganae. a) left m3 YGSP 34573, b) right m3 YGSP 34568, c) right m3 YGSP 34574, d) left M3 YGSP 34033 from Y 259, e) right M3 YGSP 34595, f) right M3 YGSP 34596, g) right M3 YGSP 33197 from Y 450, h) right M3 YGSP 34597. All teeth drawn to same scale, anterior is upward; black shading represents dentine exposed by wear; hatching on 8d represents breakage.
Thermal regimes and hatching success related data for wild king cobra nests from the Western Himalayas, Uttarakhand, India
<p>This dataset, collected between 2009-2020, describes the thermal regimes of wild king cobra nests from the foothills of the Western Himalayas of Uttarakhand, northern India. Nest and ambient temperatures at nest sites were recorded every hour via automatic data loggers during, mostly, the latter part of incubation period (post natural nest-abandonment by female king cobras). Nest attributes (e.g. size, weight etc.) and hatching success parameters (i.e. percentage of hatched eggs and offspring size) are also provided per nest. All uploaded data have been analyzed in the paper: "House warming: wild king cobra nests have thermal regimes that positively affect hatching success and hatchling size" by Dolia et al. (currently under review in Journal of Thermal Biology.)</p>
Anticipatory plasticity: frog embryos respond to environmental cues by producing an adaptive phenotype at hatching
<p>Developmental plasticity can occur at any life stage, but a context in which it might be crucial is when individuals that produce specific phenotypes early in development gain a competitive advantage at a later life stage. Here we asked if pre-hatching (embryonic) exposure to a nutrient-rich resource can impact hatchling morphology in tadpoles of Mexican spadefoot toads, <em>Spea multiplicata</em>. Induction of a distinctive carnivore morph can occur when a tadpole eats live fairy shrimp. We investigated whether cues from fairy shrimp, detected as embryos, determine hatchling morphology in a manner allowing individuals to take advantage of this nutritious resource. We found that hatchlings with embryonic exposure to shrimp were larger and had larger jaw muscles––traits that increase their ability to compete for shrimp. Thus, embryos can assess and respond to environmental cues by producing preemptive resource-use phenotypes. Such anticipatory plasticity may be an important but understudied form of developmental plasticity.</p>
Data and code for "Turning tables: food availability shapes dynamic aggressive behaviour among asynchronously hatching siblings in red kites Milvus milvus"
<p><strong>Abstract</strong></p> <p>Aggression represents the backbone of dominance acquisition in several animal societies, where the decision to interact is dictated by its relative cost. Among siblings, such costs are weighted in the light of inclusive fitness, but how this translates to aggression patterns in response to changing external and internal conditions remains unclear. Using a null-model-based approach, we investigate how day-to-day changes in food provisioning affect aggression networks and food allocation in growing red kite (<em>Milvus milvus</em>) nestlings, whose dominance rank is largely dictated by age. We show that older siblings, irrespective of age, change from targeting only close-aged peers (close-competitor pattern) when food provisioning is low, to uniformly attacking all other peers (downward heuristic pattern) as food conditions improve. While food allocation was generally skewed towards the older siblings, the youngest sibling in the nest increased its probability of accessing food as more was provisioned and as downward heuristic patterns became more prominent, suggesting that different aggression patterns allow for catch-up growth after periods of low food. Our results indicate that dynamic aggression patterns within the nest modulate environmental effects on juvenile development by influencing the process of dominance acquisition and potentially impacting the fledging body condition, with far-reaching fitness consequences.</p>
Data for: Selection on the joint action of pairs leads to divergent adaptation and coadaptation of care-giving parents during pre-hatching care
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Data from: Hatching plasticity is associated with a more advanced stage at hatching in an Ambystoma with terrestrial eggs
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Anticipatory plasticity: frog embryos respond to environmental cues by producing an adaptive phenotype at hatching
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Evolution of a mosquito’s hatching behavior to match its human-provided habitat
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No evidence for quorum sensing during egg hatching in the cestode <em>Schistocephalus solidus</em>
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Data from: Laying sequence interacts with incubation temperature to influence rate of embryonic development and hatching synchrony in a precocial bird
Incubation starts during egg laying for many bird species and causes developmental asynchrony within clutches. Faster development of late-laid eggs can help reduce developmental differences and synchronize hatching, which is important for precocial species whose young must leave the nest soon after hatching. In this study, we examined the effect of egg laying sequence on length of the incubation period in Wood Ducks (Aix sponsa). Because incubation temperature strongly influences embryonic development rates, we tested the interactive effects of laying sequence and incubation temperature on the ability of late-laid eggs to accelerate development and synchronize hatching. We also examined the potential cost of faster development on duckling body condition. Fresh eggs were collected and incubated at three biologically relevant temperatures (Low: 34.9°C, Medium: 35.8°C, and High: 37.6°C), and egg laying sequences from 1 to 12 were used. Length of the incubation period declined linearly as laying sequence advanced, but the relationship was strongest at medium temperatures followed by low temperatures and high temperatures. There was little support for including fresh egg mass in models of incubation period. Estimated differences in length of the incubation period between eggs 1 and 12 were 2.7 d, 1.2 d, and 0.7 d at medium, low and high temperatures, respectively. Only at intermediate incubation temperatures did development rates of late-laid eggs increase sufficiently to completely compensate for natural levels of developmental asynchrony that have been reported in Wood Duck clutches at the start of full incubation. Body condition of ducklings was strongly affected by fresh egg mass and incubation temperature but declined only slightly as laying sequence progressed. Our findings show that laying sequence and incubation temperature play important roles in helping to shape embryo development and hatching synchrony in a precocial bird.
Data from: The hatching mechanism of 130-million-year-old insects: an association of neonates, egg shells and egg bursters in Lebanese amber
Hatching is a pivotal moment in the life of most animals. Diverse chemical, behavioural and mechanical methods have evolved in metazoans to break the egg membranes. Among them, many arthropod and vertebrate embryos hatch using ephemeral, frequently convergent structures known as egg bursters. However, the evolutionary processes by which hatching mechanisms and related embryonic structures became established in deep time are poorly understood due to a nearly complete absence from the fossil record. Herein we describe an exceptional c. 130‐million‐year‐old association in Lebanese amber composed of multiple neonate green lacewing larvae, Tragichrysa ovoruptora gen. et sp. nov. (Neuroptera, Chrysopoidea), and conspecific egg remains. Egg bursters with a serrated blade bearing a short process are attached to three longitudinally split egg shells. Embryos of extant green lacewing relatives (Chrysopidae) utilize this egg burster morphotype to open a vertical slit on the egg, after which the burster is moulted and left joined to the empty egg shell. Additionally, the new larval species has extremely elongate dorsal tubercles, an adaptation to carry exogenous debris for protection and camouflage also known from other Cretaceous chrysopoids but absent in modern relatives. The present discovery demonstrates that the hatching mechanism of modern green lacewings was established in the chrysopoid lineage by the Early Cretaceous and proves through direct fossil evidence how some morphological traits related to hatching and linked behaviours, at least in insect embryos, have been subject to a high degree of evolutionary conservatism.
Growth Rates of Technologies in the Historical Adoption of Technologies (HATCH) Dataset
<p>Table of growth rate measurements for each technology measured from the Historical Adoption of Technologies dataset. The methods to calculate these growth rates is described in the paper "Dataset on the adoption of historical technologies informs the scale-up of emerging carbon dioxide removal measures" </p>
Data from: To hatch and hatch not: Rejecting the hypothesis that heterochrony in vestibular mechanosensing explains poor escape-hatching success of Agalychnis spurrelli in snake attacks compared with its congener A. callidryas
<p>Phyllomedusid treefrogs hatch prematurely to escape egg predation, but escape success varies among species. During spontaneous hatching of <em>Agalychnis</em> <em>spurrelli</em>, snake attacks elicited 55% less escape-hatching than did attacks on less developed <em>A. callidryas</em>. <em>Agalychnis</em> <em>callidryas</em> use their vestibular system and, secondarily, their lateral line to sense physical disturbances that cue hatching. Since <em>A. spurrelli </em>develop faster, we hypothesized that heterochronic shifts in the onset timing of vestibular mechanosensory function, relative to hatching ability, might explain their lower escape response to mechanosensory cues. To test this, we compared the onset timing of hypoxia- and mechanosensory-cued hatching (MCH) and vestibular mechanosensory function in developmental series of <em>A. spurrelli</em> and <em>A. callidryas</em> embryos. Across species, most sibships began responding to each cue at the same developmental stage. MCH onset in A. spurrelli was associated with vestibular function onset, as indicated by measurements of the vestibulo-ocular reflex (VOR). Indeed, the first <em>A. spurrelli</em> embryos to show MCH had VOR amplitudes similar to those previously found for <em>A. callidryas</em> at the onset of MCH. These results indicate that low escape-hatching success in <em>A. spurrelli</em> is not caused by a relative delay in the onset of vestibular mechanosensory function, rejecting our initial hypothesis; the developmental timing of vestibular mechanosensing and its role in predator-induced hatching appears conserved. Our observations of both higher escape success of larger clutches in snake attacks and hatching complications in flooded A. spurrelli suggest, instead, that differences in egg capsule and clutch structure may contribute to species differences in escape-hatching success.</p>
Data from: Temperature has an overriding role compared to photoperiod in regulating the seasonal timing of winter moth egg hatching
<p>To accurately predict species' phenology under climate change, we need to gain a detailed mechanistic understanding of how different environmental cues interact to produce the seasonal timing response. In the winter moth (<em>Operophtera brumata</em>), seasonal timing of egg hatching is strongly affected by ambient temperature and has been under strong climate change-induced selection over the past 25 years. However, it is unclear whether photoperiod received at the egg stage also influences timing of egg hatching. Here, we investigated the relative contribution of photoperiod and temperature in regulating winter moth egg development using two split-brood experiments. We experimentally shifted the photoperiod eggs received by 2-4 weeks compared to the actual calendar date and measured the timing of egg hatching, both at a constant temperature and in combination with two naturally changing temperature treatments – mimicking a cold and a warm year. We found an eight-fold larger effect of temperature compared to photoperiod on egg development time. Moreover, the very small photoperiod effects we found were outweighed by both between- and within-clutch variation in egg development time. Thus, we conclude that photoperiod received at the egg stage does likely not play a substantial role in regulating the seasonal timing of egg hatching in the winter moth. These insights into the regulatory mechanism of seasonal timing could have important implications for predicting insect climate change adaptation, as we might expect different targets of selection depending on the relative contribution of different environmental cues.</p>
Data from: Delayed incubation leads to hatching failure of a Burrowing Owl (Athene cunicularia) nest
<p>Birds face strong selective pressures to complete individual nesting attempts as quickly as possible to minimize exposure of nests to predators and weather, maximize renesting potential, and maximize hatching success. As a result, the duration of developmental periods and overall nest periods are often relatively constant within species. However, birds may sometimes be subject to acute energetic constraints that may preclude them from initiating incubation at the optimal time. We report an extraordinary case of delayed incubation by a female Burrowing Owl (<em>Athene cunicularia</em>) in Oregon, USA, which contrasted sharply with a large sample of nests monitored by motion-activated video cameras in western North America from 2015 to 2018. The focal female delayed incubation by 11 days following clutch completion and subsequently experienced near-total hatching failure of her clutch. This observation corroborates previous experimental studies regarding the limits to egg viability and trade-offs between the timing of incubation onset and hatching success. These findings illustrate the acute trade-offs faced by nesting birds, and the cost of delayed incubation that we observed in this owl could help explain the cause of asynchronous hatching.</p>
Ontogeny of risk assessment and escape-hatching performance by red-eyed treefrog embryos in two threat contexts
<p><span>Arboreal embryos of red-eyed treefrogs,<span class="Apple-converted-space"> </span></span><em>Agalychnis callidryas</em><span>, hatch prematurely in response to hypoxia when flooded and mechanosensory cues (MC) in snake attacks, but hatching later improves tadpole survival. We studied ontogenetic changes in risk assessment and hatching performance of embryos in response to flooding and physical disturbance. We hypothesized that risk assessment decreases as hatchling survival improves and hatching performance increases as embryos develop. Because snakes eat faster than embryos asphyxiate, we hypothesized that embryos decide to hatch sooner and hatch faster in response to MC. We video-recorded individual embryos hatching in response to each cue type, then compared the incidence and timing of a series of events and behaviors from cue onset to complete hatching across ages and stimuli. Latency from cue to hatching decreased developmentally in both contexts and was shorter with MC, but the elements contributing to those changes differed.</span><em> </em><span>Hypoxia-assessment involved position changes, which decreased developmentally along with assessment time. MC-assessment<span class="Apple-converted-space"> </span></span><span>occurred more rapidly, without movement, and decreased</span><span><span class="Apple-converted-space"> </span>with age. The first stages of hatching, membrane rupture and head emergence, were surprisingly age-independent but faster with MC, congruent with greater effort under more immediate risk. In contrast, body emergence and compression showed ontogenetic improvement consistent with morphological constraints but no cue effect. Both appropriate timing and effective performance of hatching are necessary for continued development. Different stages of the process vary with development and environmental context, suggesting combinations of adaptive context- and stage-dependent behavior, cue-related constraints on information acquisition, and ontogenetic constraints on elements of performance. </span></p>
Data from: Paternal hatching care regulates the timing, synchrony, and success of hatching in a coral reef fish
<p>In oviparous species, the timing of hatching is a crucial decision, but for developing embryos, assessing cues that indicate the optimal time to hatch is challenging. In species with parental care, parents can assess environmental conditions and induce their offspring to hatch. We provide the first documentation of parental hatching regulation in a coral reef fish, demonstrating that male neon gobies (<em>Elacatinus colini</em>) directly regulate hatching by removing embryos from the clutch and spitting hatchlings into the water column. All male gobies synchronized hatching within 2h of sunrise, regardless of when eggs were laid. Paternally-incubated embryos hatched later in development, more synchronously, and had higher hatching success than artificially-incubated embryos that were shaken to simulate paternal hatching cues or not stimulated. Artificially-incubated embryos displayed substantial plasticity in hatching times (range: 88 – 244 hours post-fertilization), suggesting that males could respond to environmental heterogeneity by modifying the hatching time of their offspring. Finally, paternally-incubated embryos hatched with smaller yolk sacs and larger propulsive areas than artificially-incubated embryos, suggesting that paternal effects on hatchling phenotypes may influence larval dispersal and fitness. These findings highlight the complexity of fish parental care and may have important, and currently unstudied, consequences for fish population dynamics.</p>
Hatched
ID no.: MAK/N/112:1 Archaeological Museum in Kraków https://muzea.malopolska.pl/en/objects-list/1468 Digitalisation: RDW MIC, Virtual Małopolska project Source: Objaverse 1.0 / Sketchfab
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