Animal Reproduction

Misdirected Courtship and Sex With Other Species

January 20, 2021 0
Evolution should select for individuals that employ ways of discerning members of their own species from any others. Reproductive success of those engaing in sex with organisms of another species should therefore be drastically reduced. […]
Animal Reproduction

Hermaphrodites in the Animal Kingdom

October 21, 2020 0
As members of a species with separate sexes, humans tend to forget about the suite of organisms out there that are hermaphrodites, simultaneously carrying male and female genitalia. Hermaphroditism is present in 24 of the […]
Animal Reproduction

These Lizards Can Engage In Either Live Birth Or Egg-Laying

August 12, 2020 0
Although rare, there are three identified (so far) amphibian species where females can engage in either egg-laying (oviparity) or give birth to live young (viviparity). Zootoca Vivipara – The Viviparous Lizard The lizard Zootoca vivipara […]
Animal Reproduction

The Tree Frog That Can Lay Eggs In Water And On Land

July 8, 2020 0
The tree frog Dendropsophus ebraccatus utilizes a strange form of parental plasticity that is almost unique in the animal kingdom. These parents can deposit their eggs in either terrestrial or aquatic habitats. This is extremely […]
Animal Reproduction

Pregnant Males: Seahorses and Pipefishes

June 24, 2020 0
A certain level of sex-role reversal is observed in insects, amphibians, and birds, but nowhere is it more clearly developed than in the seahorses and pipefishes. In these species, males get pregnant and give birth […]
Animal Parenting

Can Males Lactate?

June 17, 2020 1
It is physiologically possible for males to lactate! As we know, the female investment in almost all animals is much higher than that of males based solely on the value of eggs versus sperm. However, […]