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5 results for “Cavia porcellus”
Fig. 2 in Phenotypic and Genotypic Characterization ofEimeria caviae from Guinea Pigs (Cavia porcellus)
Fig. 2. Photomicrographs of sporulated oocysts of Eimeria caviae, a coccidium species recovered from Guinea pigs Cavia porcellus: (A, B, D) sub-spherical, (C, D) ellipsoidal, and (D, E, F) ovoidal oocysts. In (D) three shapes can be observed in the same field. The arrowheads point the Stieda and parastieda bodies. Sheather's sugar solution. Scale bar: 10 µm.
Fig. 3 in Phenotypic and Genotypic Characterization ofEimeria caviae from Guinea Pigs (Cavia porcellus)
Fig. 3. Histograms of (A) length, width and (B) shape-index, and (C) linear regression of the oocysts of Eimeria caviae, a coccidium species recovered from Guinea pigs Cavia porcellus.
Fig. 1 in Phenotypic and Genotypic Characterization ofEimeria caviae from Guinea Pigs (Cavia porcellus)
Fig. 1. Line drawings of sporulated oocysts of Eimeria caviae, a coccidium species recovered from Guinea pigs Cavia porcellus: (A) subspherical, (B) ellipsoidal, and (C) ovoidal oocysts; (D–G) variations of the Stieda bodies; (H–K) variations of the parastieda bodies; (L–M) variations of roughness of the oocyst wall. Scale bar: 10 µm.
Data from: The way wear goes – phytolith-based wear on the dentine-enamel system in guinea pigs (Cavia porcellus)
The effect of phytoliths on tooth wear and function has been contested in studies of animal plant interactions. For herbivores whose occlusal chewing surface consists of enamel ridges in dentine tissue, the phytoliths might first erode the softer dentine, exposing the enamel ridges to different occlusal forces and thus leading to enamel wear. To test this hypothesis, we fed guinea pigs (Cavia porcellus; n=36 in 6 groups) for three weeks exclusively on dry or fresh forage of low (lucerne), moderate (fresh timothy grass) or very high (bamboo leaves) silica content representing corresponding levels of phytoliths. We quantified the effect of these treatments with measurements from micro CT scans. Tooth height indicated extreme wear of the bamboo diet that apparently brought maxillary incisors and molars close to the minimum required for functionality. There were negative relationships between a cheek tooth's height and the depth of its dentine basin, corroborating the hypothesis that dentine erosion plays an important role in herbivore tooth wear. In spite of lower body mass, bamboo-fed animals had paradoxically longer cheek tooth rows, and larger occlusal surfaces. Because ever-growing teeth can only change in shape from the base upwards, this is a strong indication that failure to compensate for wear by dental height-growth additionally triggered general expansive growth of the tooth bases. The results suggest that enamel wear may occur in sequence after dentine wear and not the other way around, and illustrate a surprising plasticity in the reactivity of this rodent's system that adjusts tooth growth to wear.
Data from: The way wear goes – phytolith-based wear on the dentine-enamel system in guinea pigs (Cavia porcellus)
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