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16 results for “Gryllus campestris”
Figure 13 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 13. TEM micrograph of the cross-section of the Malpighian tubules. M: Mitochondria; Sg: secretory granules; (◌): spherocrystals or mineral concretions.
Figure 12 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 12. TEM micrograph of the cross-section of the Malpighian tubules. N: Nucleus; M: mitochondria; GER: rough endoplasmic reticulum; Mv: microvilli; L: lumen.
Figure 5 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 5. SEM micrograph of the cross-section of the Malpighian tubules. Tr: Trachea; Ms: muscle; Mv: microvilli; L: lumen.
Figure 9 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 9. TEM micrograph of the basal side of the Malpighian tubules. BL: Basal lamina; (→): basal plasma membrane infoldings.
Figure 1 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 1. Stereomicroscope image of a part of the alimentary canal and the Malpighian tubules in Gryllus campestris.
Figure 4 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 4. SEM micrograph of the cross-section of the Malpighian tubules. Mv: Microvilli; L: lumen; E: epithelial cell.
Figure 11 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 11. TEM micrograph of the cross-section of the Malpighian tubules. M: Mitochondria; Ls: lysosome-like bodies; Mv: microvilli.
Figure 3 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 3. Light microscopy image of the cross-section of the Malpighian tubules (400×). Nucleus (arrows); microvilli (encircled); L: lumen.
Figure 2 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 2. SEM micrograph of a part of the alimentary canal and the Malpighian tubules in Gryllus campestris.
Figure 10 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 10. TEM micrograph of the basal side of the Malpighian tubules. Ms: Muscle; M: mitochondria; (→): basal plasma membrane infoldings.
Figure 7 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 7. TEM micrograph of the cross-section of the Malpighian tubules. Trachea (arrow); N: nucleus; Mv: microvilli; and L: lumen.
Figure 6 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 6. TEM micrograph of the cross-section of the Malpighian tubules. Muscle (arrow); N: nucleus; Mv: microvilli; L: lumen.
Figure 8 in Fine structure of the Malpighian tubules in Gryllus campestris (Linnaeus, 1758) (Orthoptera, Gryllidae)
Figure 8. The enlargements of the tips of the microvilli (Þ).
Evidence for genetic isolation and local adaptation in the field cricket Gryllus campestris
<p>Understanding how species can thrive in a range of environments is a central challenge for evolutionary ecology. There is strong evidence for local adaptation along large-scale ecological clines in insects. However, potential adaptation among neighbouring populations differing in their environment has been studied much less. We used RAD-sequencing to quantify genetic divergence and clustering of ten populations of the field cricket <i>Gryllus campestris </i>in the Cantabrian Mountains of northern Spain, and an outgroup on the coastal plain. Our populations were chosen to represent replicate high and low altitude habitats. We identified genetic clusters that include both high and low altitude populations indicating that the two habitat types do not hold ancestrally distinct lineages. Using common-garden rearing experiments to remove environmental effects, we found evidence for differences between high and low altitude populations in physiological and life-history traits. As predicted by the local adaptation hypothesis, crickets with parents from cooler (high altitude) populations recovered from periods of extreme cooling more rapidly than those with parents from warmer (low altitude) populations. Growth rates also differed between offspring from high and low altitude populations. However, contrary to our prediction that crickets from high altitudes would grow faster, the most striking difference was that at high temperatures, growth was fastest in individuals from low altitudes. Our findings reveal that populations a few tens of kilometres apart have independently evolved adaptations to their environment. This suggests that local adaptation in a range of traits may be commonplace even in mobile invertebrates at scales of a small fraction of species' distributions.</p>
Evidence for genetic isolation and local adaptation in the field cricket Gryllus campestris
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Fluctuating selection among years in a wild insect (Gryllus campestris)
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