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72 results for “egg hatching”
Data from: Temperature has an overriding role compared to photoperiod in regulating the seasonal timing of winter moth egg hatching
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Data from: The hatching mechanism of 130-million-year-old insects: an association of neonates, egg shells and egg bursters in Lebanese amber
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Figure 1 in Pre-ovipositional and ovipositional behaviour of Trichouropoda ovalis (C.L. Koch) and Uroobovella marginata (C.L. Koch) (Parasitiformes: Uropodina: Trematuridaeı Urodinychidae) with notes on egg incubation and hatching behaviour
Figure 1. Egg clusters of Trichouropoda ovalis (a,b) and Uroobovella marginata (c,d). (a,c) eggs deposited on plaster of Paris and charcoal substrate; (b,d) eggs deposited on the wall of a culture cell. Scale bar: 500µm.
Data from: Rapid evolutionary loss of metal resistance revealed by hatching decades-old eggs
We investigated the evolutionary response of an ecologically important freshwater crustacean, Daphnia, to a rapidly changing toxin environment. From the 1920s until the 1960s, the use of leaded gasoline caused the aquatic concentration of Pb to increase at least 5-fold, presumably exerting rapid selective pressure on organisms for resistance. We predicted that Daphnia from this time of intense pollution would display greater resistance than those hatched from times of lower pollution. This question was addressed directly using the resurrection ecology approach, whereby dormant propagules from focal time periods were hatched and compared. We hatched several Daphnia genotypes from each of two Swiss lakes, during times of higher (1960s / 1980s) and lower (2000s) lead stress, and compared their life histories under different laboratory levels of this stressor. Modern Daphnia had significantly reduced fitness, measured as the population growth rate (λ), when exposed to lead, while those genotypes hatched from times of high lead pollution did not display this reduction. These phenotypic differences contrast with only slight differences measured at neutral loci. We infer that Daphnia in these lakes were able to rapidly adapt to increasing lead concentrations, and just as rapidly lost this adaptation when the stressor was removed.
Data from: Post-hatching parental care masks the effects of egg size on offspring fitness: a removal experiment on burying beetles
Parents can increase the fitness of their offspring by allocating nutrients to eggs and/or providing care for eggs and offspring. Although we have a good understanding of the adaptive significance of both egg size and parental care, remarkably little is known about the co-evolution of these two mechanisms for increasing offspring fitness. Here, we report a parental removal experiment on the burying beetle Nicrophorus vespilloides in which we test whether post-hatching parental care masks the effect of egg size on offspring fitness. As predicted, we found that the parent's presence or absence had a strong main effect on larval body mass, while there was no detectable effect of egg size. Furthermore, egg size had a strong and positive effect on offspring body mass in the parent's absence, while it had no effect on offspring body mass in the parent's presence. These results support the suggestion that the stronger effect of post-hatching parental care on offspring growth masks the weaker effect of egg size. We found no correlation between the number and size of eggs. However, there was a negative correlation between larval body mass and brood size in the parent's presence, but not in its absence. These findings suggest that the trade-off between number and size of offspring is shifted from the egg stage towards the end of the parental care period, and that post-hatching parental care somehow moderates this trade-off.
Figs. 21–29. Dasytes vulgaris. 21 in Egg Hatch and Early Instars ofDasytes(Mesodasytes)vulgarisNakane (Coleoptera: Melyridae: Dasytinae) and Comparison with the Related Subfamily Malachiinae
Figs. 21–29. Dasytes vulgaris. 21) Adult male; 22) Habitat; 23) Eggs at ovipositon; 24) Eggs at egg burst; 25) Egg hatch, ct = cuticle; 26) Larva at egg burst, y = yolk; 27) Egg bursters (eb); 28) Rupture of the chorion (arrow); 29) Neonate larvae.
Fig. 30 in Egg Hatch and Early Instars ofDasytes(Mesodasytes)vulgarisNakane (Coleoptera: Melyridae: Dasytinae) and Comparison with the Related Subfamily Malachiinae
Fig. 30. Comparison of growth processes of Dasytes vulgaris and three species of Malachiinae, Laius asahinai, Intybia niponicus, and Nepacys japonicus.
Figs. 15–20 in Egg Hatch and Early Instars ofDasytes(Mesodasytes)vulgarisNakane (Coleoptera: Melyridae: Dasytinae) and Comparison with the Related Subfamily Malachiinae
Figs. 15–20. Larva after third molt of Dasytes vulgaris. 15) Habitus, dorsal view; 16) Head, dorsal view; 17) Head, ventral view; 18) Labrum, dorsal view; 19) Proleg; 20) Urogomphi. Scale bar A: Fig. 15; scale bar B: Figs. 18–20; scale bar C: Figs. 16–17.
Figs. 9–14 in Egg Hatch and Early Instars ofDasytes(Mesodasytes)vulgarisNakane (Coleoptera: Melyridae: Dasytinae) and Comparison with the Related Subfamily Malachiinae
Figs. 9–14. Neonate larva of Dasytes vulgaris. 9) Habitus, dorsal view; 10) Head, dorsal view; 11) Head, ventral view; 12) Proleg; 13) Mesonotal spiracle; 14) Urogomphi. Scale bar A: Fig. 9; scale bar B: Figs. 10–14.
Figs. 4–8 in Egg Hatch and Early Instars ofDasytes(Mesodasytes)vulgarisNakane (Coleoptera: Melyridae: Dasytinae) and Comparison with the Related Subfamily Malachiinae
Figs. 4–8. Larva at egg burst of Dasytes vulgaris. 4) Habitus, lateral view; 5) Head, ventral view; 6) Right mandible, ventral view; 7) Proleg; 8) Urogomphi, dorsal view. Scale bar A: Fig. 4; scale bar B: Figs. 5–8.
Supplementary material 3 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 3 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 1 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 1 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 2 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 2 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 4 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 4 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
FIGURE 42. Egg hatch from single field collected G in Crickets of the genus Gryllus in the United States (Orthoptera: Gryllidae: Gryllinae)
FIGURE 42. Egg hatch from single field collected G. firmus (S13-65) from near Schulenburg, TX, showing a mixed egg diapause pattern.
Data from: Effects of radiation from contaminated soil and moss in Fukushima on embryogenesis and egg hatching of the aphid Prociphilus oriens
Radiation-contaminated soils are widespread around the Fukushima Daiichi Nuclear Power Plant, and such soils raise concerns over its harmful effect on soil-dwelling organisms. We evaluated the effects of contaminated soil and moss sampled in Fukushima on the embryogenesis and hatching of aphid eggs, along with the measurement of the egg exposure dose. Cs-137 concentration in soil and moss from Fukushima ranged from 2200 to 3300 Bq/g and from 64 to 105 Bq/g, respectively. Eggs of the eriosomatine aphid Prociphilus oriens that were collected from a non-contaminated area were directly placed on the soil and moss for 4 or 3 months during diapause and then incubated until hatching. The total exposure dose to the eggs was estimated as ca. 100–200 mGy in the 4-month soil experiment and 4–10 mGy in the 4-month moss experiment. There was no significant difference in egg hatchability between the contaminated soil treatment and the control. No morphological abnormalities were detected in the first instars that hatched from the contaminated soil treatment. However, we found weak effects of radiation on egg hatching; eggs placed on the contaminated moss hatched earlier than did the control eggs. On the contaminated soil, the effects of radiation on egg hatching were not obvious because of uncontrolled environmental differences among containers. The effects of radiation on egg hatching were detected only in containers where high hatchability was recorded. Through the experiments, we concluded that the aphid eggs responded to ultra-low-dose radiation by advancing embryogenesis.
Figs. 14–20 in Egg Hatch and First Instar of Semijulistus spectabilis (Lewis) (Coleoptera: Rhadalidae) and Diversification of the Ontogenic Development of the Melyrid Lineage
Figs. 14–20. Adult sternites: 14) Semijulitus spectabilis (Rhadalidae); 15) Cordylepherus xantholoma (Kiesenwetter) (Melyridae, Malachiinae); 16) Dasytes vulgaris (Melyridae, Dasytinae). Eggs at oviposition: 17) Holzschuhus yoronensis (from Asano 2019); 18) Laius asahinai; 19) Attalus elongatulus (from Asano 2018); 20) D. vulgaris (from Asano 2016).
Figs. 1–4 in Egg Hatch and First Instar of Semijulistus spectabilis (Lewis) (Coleoptera: Rhadalidae) and Diversification of the Ontogenic Development of the Melyrid Lineage
Figs. 1–4. First instar and egg of Semijulitus spectabilis. 1) Dorsal habitus; 2–3) Head, dorsal and ventral views, respectively; 4) Egg. Scale bar A: Fig 1; scale bar B: Figs. 2–3; scale bar C: Fig. 4.
Figs. 21–28 in Egg Hatch and First Instar of Semijulistus spectabilis (Lewis) (Coleoptera: Rhadalidae) and Diversification of the Ontogenic Development of the Melyrid Lineage
Figs. 21–28. Early instars of melyrid beetles. 21) Laius asahinai, first instar; 22) Laius asahinai, second instar; 23) Intybia niponicus, first instar; 24) Nepachys japonicus, first instar; 25) Holzschuhus yoronensis, first instar; 26) Attalus elongatulus, first instar; 27) Dasytes vulgaris, embryo after egg burst, msb = egg burster of mesonotum; mtb, = egg burster of metanotum, prb = egg pronotum; 28) D. vulgaris, first instar. Scale bars = 0.2 mm. Figs. 21 and 22 from Asano and Kojima (2013); Fig. 23 from Asano (2013); Fig. 24 from Asano (2014); Fig. 25 from Asano (2018); Fig. 26 from Asano (2017); Figs. 27 and 28 from Asano (2016).
Figs. 5–13. Semijulitus spectabilis. 5 in Egg Hatch and First Instar of Semijulistus spectabilis (Lewis) (Coleoptera: Rhadalidae) and Diversification of the Ontogenic Development of the Melyrid Lineage
Figs. 5–13. Semijulitus spectabilis. 5) Habitat; 6) Mating; 7) Feeding; 8) Eggs at oviposition; 9) Eggs at egg burst; 10) Chorion after hatching; 11) First instar hiding in bark crevice; 12) Egg hatch; 13) First instar, ventral view. 1L = first instar; cr = chorion; y = yolk.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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