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In many frog species, such as the common tree frog (Polypedates leucomystax), females reply to males' calls, which acts to reinforce reproductive activity in a breeding colony. [93] Female frogs prefer males that produce sounds of greater intensity and lower frequency, attributes that stand out in a crowd.
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 ...
The frog's skin is smooth, but with a lateral line sensory organ that has a stitch-like appearance. The frogs are all excellent swimmers and have powerful, fully webbed toes, though the fingers lack webbing. Three of the toes on each foot have conspicuous black claws. The frog's eyes are on top of the head, looking upwards. The pupils are circular.
During the amplexus, the female's back is gradually swelled to a puffy condition. The male and female cloacae are brought close together, and many eggs are transferred anteriorly to the female's swollen dorsal epidermis. The eggs, each around 6.5 mm in diameter, then become implanted into the female's dorsal epidermis. During the first day the ...
This finding refutes previous claims that a male frog will clasp any proximate female with no regard to whether the female has consented. [32] [34] [35] [36] Once a male finds a receptive female he will clasp onto her and undergo amplexus—reproductive position—by utilization of the males' forelimbs. The enlargement of forelimb muscles is a ...
Multimale amplexus, in which multiple males mate with a single female, is the predominant method of mating that the moor frog performs. [19] The sperm of male moor frogs compete in the female reproductive tract for fertilization of the female's egg. Female frogs do not appear to prefer males of a particular size. [19]
The characteristic quivering abdomen caused by movement of tadpoles within a pregnant female Limnonectes larvaepartus. Ovoviviparity , ovovivipary , ovivipary , or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction.
The human female reproductive system is a series of organs primarily located inside of the body and around the pelvic region of a female that contribute towards the reproductive process. The human female reproductive system contains three main parts: the vulva, which leads to the vagina, the vaginal opening, to the uterus; the uterus, which ...