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Male Dendropsophus microcephalus calling. Sexual selection in amphibians involves sexual selection processes in amphibians, including frogs, salamanders and newts.Prolonged breeders, the majority of frog species, have breeding seasons at regular intervals where male-male competition occurs with males arriving at the waters edge first in large number and producing a wide range of vocalizations ...
Frogs constitute another conspicuous illustration of the principle. There are two types of dichromatism for frog species: ontogenetic and dynamic. Ontogenetic frogs are more common and have permanent color changes in males or females. Ranoidea lesueuri is an example of a dynamic frog with temporary color changes in males during the breeding ...
Sources say frogs use low frequency sound of rain as a cue to emerge from aestivation. [12] While olfactory cues are considered a secondary emergence stimulus, there is evidence in other anurans that the smell of emergent plant growth can also guide frogs to breeding sites, specifically pond weed species.
Two main types of reproduction occur in frogs, prolonged breeding and explosive breeding. In the former, adopted by the majority of species, adult frogs at certain times of year assemble at a pond, lake or stream to breed. Many frogs return to the bodies of water in which they developed as larvae.
The edible bullfrog spends approximately 10 months of the year in aestivation beneath the surface of the soil, only emerging to breed in numbers if sufficiently heavy rain, i.e. more than 70 mm (2.8 in), falls within a short period. After which male edible bullfrogs call on the flooded grassland and from any small, temporary pools such as ...
The call lasts about a second and can be described as a low-pitched whoop. [16] Males have two breeding strategies, depending on their age. Young males congregate in a small area, perhaps only 1–2 m 2 (11–22 sq ft) of shallow water. The larger males occupy the centre of these breeding arenas or leks, and attempt to chase off other males ...
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The green head can be more or less prominent on certain individuals, with some frogs only having green on the side of their heads while other frogs are green all the way down their back. The belly is white with black mottling. Male green frogs in breeding condition have yellow throats. Green frogs are darker colored on colder days to help ...