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107 results for “larval frogs”
Figure 10 in Morphological evolution in Ceratophryinae frogs (Anura, Neobatrachia): the effects of heterochronic changes during larval development and metamorphosis
Figure 10. Total length (TL) versus snout–vent length (SVL) plotted for larval specimens of six species between stages 39 and 41. Ceratophrys cranwelli tadpoles (N = 8, TL = 61.8 ± 8.2 mm, SVL = 26.3 ± 3.8 mm) are the smallest. Pseudis platensis larvae (N = 9, TL = 129.5 ± 14.4 mm, SVL = 46.3 ± 3.6 mm) are the largest. Lepidobatrachus laevis (N = 12, TL = 98.3 ± 7.2 mm, SVL = 46.6 ± 2.8 mm) and Chacophrys pierottii (N = 10, TL = 106.5 ± 8.0 mm, SVL = 46.3 ± 3.9 mm) share with P. platensis similar values of SVL. Lepidobatrachus llanensis (N = 15, TL = 83.7 ± 7.5 mm, SVL = 36.7 ± 3.4 mm) and Telmatobius atacamensis (N = 11, TL = 84.6 ± 4.8 mm, SVL = 32.9 ± 3.4 mm) are similar in total length, but L. llanensis tadpoles have greater body sizes.
Figure 1 in Morphological evolution in Ceratophryinae frogs (Anura, Neobatrachia): the effects of heterochronic changes during larval development and metamorphosis
Figure 1. The hypothetic relationships among ten anuran taxa that resulted from the analyses of 102 morphological characters. A, the only tree that was obtained from the analysis of larval and adult characters. B, strict consensus of relationships obtained from the analysis of 61 larval characters. C, strict consensus of relationships obtained from the analysis of 41 adult characters.
Fig. 2 in First record of the Vietnam Flying Frog, Rhacophorus calcaneus Smith, 1924, from Khanh Hoa Province, including the first molecular identification and morphological description of larval stages
Fig. 2. Drawings of the preserved tadpole (VNMN 6318) of Rhacophorus calcaneus from Hon Ba Nature Reserve in Gosner Stage 32: lateral view (A), dorsal view (B) (scale bar = 1 cm); oral apparatus (C) (scale bar = 0.5 mm).
Fig. 3 in First record of the Vietnam Flying Frog, Rhacophorus calcaneus Smith, 1924, from Khanh Hoa Province, including the first molecular identification and morphological description of larval stages
Fig. 3. Drawings of the preserved tadpoles of Rhacophorus calcaneus from Hon Ba Nature Reserve in advanced Gosner stages. (A) Stage 36. (B) Stage 37. (C) Stage 41 and (D) Stage 42 (scale bar = 1 cm).
Fig. 1 in First record of the Vietnam Flying Frog, Rhacophorus calcaneus Smith, 1924, from Khanh Hoa Province, including the first molecular identification and morphological description of larval stages
Fig. 1. Maximum-likelihood (ML) and Bayesian inference (BI) tree based on the partial 16S rRNA mitochondrial gene. Numbers above and under branches are ML bootstrap values and Bayesian posterior probabilities.
Influence of density and salinity on larval development of salt-adapted and salt-naïve frog populations
<p>Environmental change and habitat fragmentation will affect population densities for many species. For those species that have locally adapted to persist in changed or stressful habitats, it is uncertain how density dependence will affect adaptive responses. Anurans (frogs and toads) are typically freshwater organisms, but some coastal populations of green treefrogs (<i>Hyla cinerea</i>) have adapted to brackish, coastal wetlands. Tadpoles from coastal populations metamorphose sooner and demonstrate faster growth rates than inland populations when reared solitarily. Although saltwater exposure has adaptively reduced the duration of the larval period for coastal populations, increases in densities during larval development typically increase time to metamorphosis and reduce rates of growth and survival. We test how combined stressors of density and salinity affect larval development between salt-adapted ("coastal") and non-salt adapted ("inland") populations by measuring various developmental and metamorphic phenotypes. We found that increased tadpole density strongly affected coastal and inland tadpole populations similarly. In high-density treatments, both coastal and inland populations had reduced growth rates, greater exponential decay of growth, a smaller size at metamorphosis, took longer to reach metamorphosis, and had lower survivorship at metamorphosis. Salinity only exaggerated the effects of density on the time to reach metamorphosis and exponential decay of growth. Location of origin affected length at metamorphosis, with coastal tadpoles metamorphosing slightly longer than inland tadpoles across densities and salinities. These findings confirm that density has a strong and central influence on larval development even across divergent populations and habitat types and may mitigate the expression (and therefore detection) of locally adapted phenotypes.</p>
Figure 4 in Husbandry, captive breeding, larval development and stages of the Malayan horned frog Megophrys nasuta (Schlegel, 1858) (Amphibia: Anura: Megophryidae)
Figure 4. Megophrys nasuta larvae in stages 25 to 45. Drawings: M. Wildenhues.
Figure 3 in Husbandry, captive breeding, larval development and stages of the Malayan horned frog Megophrys nasuta (Schlegel, 1858) (Amphibia: Anura: Megophryidae)
Figure 3. Megophrys nasuta larvae in stages 18 to 22. Drawings: R. Bach.
Figure 7 in Husbandry, captive breeding, larval development and stages of the Malayan horned frog Megophrys nasuta (Schlegel, 1858) (Amphibia: Anura: Megophryidae)
Figure 7. Megophrys nasuta larvae in stages 30 to 34. Photos: M. Wildenhues.
Figure 6 in Husbandry, captive breeding, larval development and stages of the Malayan horned frog Megophrys nasuta (Schlegel, 1858) (Amphibia: Anura: Megophryidae)
Figure 6. Megophrys nasuta larvae in stages 25 to 29. Photos: M. Wildenhues.
Figure 9 in Husbandry, captive breeding, larval development and stages of the Malayan horned frog Megophrys nasuta (Schlegel, 1858) (Amphibia: Anura: Megophryidae)
Figure 9. Megophrys nasuta larvae in stages 41 to 46. Photos: M. Wildenhues.
Influence of density and salinity on larval development of salt-adapted and salt-naïve frog populations
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Temperature-mediated tradeoff between development and performance in larval wood frogs (Rana sylvatica)
<p>Countergradient variation has been detected in diverse taxa. In a common manifestation, individuals from colder environments develop faster than conspecifics from warmer environments when placed in a common garden. Where such a pattern exists, it implies a tradeoff: individuals from warmer environments have intrinsic rates of development lower than those demonstrated by other individuals of the same species. We explored a tradeoff between development rate and locomotor performance in the wood frog (Rana sylvatica), an amphibian for which countergradient variation has been well documented. We reared wood frogs from 10 populations under two temperature regimes, bracketing the temperatures observed in local natural ponds. Individuals reared under warmer conditions developed more rapidly but exhibited burst speeds 20% lower than individuals reared under colder conditions. The shape of the relationship was consistent across the 10 populations and thus, we found no evidence of countergradient variation in performance. Burst speed assays of wild-caught tadpoles from the same populations showed a similar but nonsignificant trend, with greater variability among ponds. Overall, our findings support the existence of a tradeoff that may be of broad importance and which may help explain widespread occurrence of countergradient variation.</p>
FIGURE 2 in Comparative larval morphology in Madagascan frogs of the genus Guibemantis (Amphibia: Mantellidae)
FIGURE 2. Drawings of the preserved DNA voucher tadpole of Guibemantis depressiceps, series ZSM 425–429/2004; (a) dorsal view, (b) lateral view, (c) oral disc.
FIGURE 4 in Comparative larval morphology in Madagascan frogs of the genus Guibemantis (Amphibia: Mantellidae)
FIGURE 4. Drawings of the preserved voucher tadpole of Guibemantis tornieri, series ZSM 424/ 2004; (a) dorsal view, (b) lateral view, (c) oral disc.
FIGURE 3 in Comparative larval morphology in Madagascan frogs of the genus Guibemantis (Amphibia: Mantellidae)
FIGURE 3. Drawings of the preserved DNA voucher tadpole of Guibemantis kathrinae, series ZSM 460/2004; (a) dorsal view, (b) lateral view, (c) oral disc.
FIGURE 1 in Comparative larval morphology in Madagascan frogs of the genus Guibemantis (Amphibia: Mantellidae)
FIGURE 1. Drawings of the preserved DNA voucher tadpoles in (dorsal and lateral view, and oral disk) of Guibemantis liber from central-eastern Madagascar (a,b,c; series ZSM 466–467/2004) and from south-eastern Madagascar (d, e, f; series ZSM 433/2004).
FIGURE 3 in Larval morphology in four species of Madagascan frogs of the subgenus Brygoomantis (Mantellidae: Mantidactylus)
FIGURE 3. Drawings of the preserved voucher tadpole of Mantidactylus sp. aff. betsileanus "Vohidrazana" (stage 37), series ZSM 1063/2004 (left leg cut for tissue sample); (A) dorsal view, (B) lateral view, (C) oral disc.
FIGURE 2 in Larval morphology in four species of Madagascan frogs of the subgenus Brygoomantis (Mantellidae: Mantidactylus)
FIGURE 2. Drawings of the preserved voucher tadpole of Mantidactylus sp. aff. betsileanus "very slow calls" (stage 25), series ZSM 841/2004; (A) dorsal view, (B) lateral view, (C) oral disc.
FIGURE 1 in Larval morphology in four species of Madagascan frogs of the subgenus Brygoomantis (Mantellidae: Mantidactylus)
FIGURE 1. Drawings of the preserved voucher tadpole of Mantidactylus betsileanus (stage 38), series ZSM 880/2004; (A) dorsal view, (B) lateral view, (C) oral disc.
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Allen Brain Atlas
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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
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