Sentence examples for males cannot copulate from inspiring English sources

This mating behavior fits both classical courtship behavior and "persuasive mating" behavior [1], due to the fact that females control mating initiation and males cannot copulate without female cooperation.

If they cannot copulate, the animation shows unsuccessful copulation in that they approach each other and try to copulate, but separate immediately (d).

When the glandular source of the scent that is unique to nymphs is blocked, males will copulate with them.

However, deaf males, which cannot detect female song, still copulated at WT rates when paired with WT females.

Subadult males often forcibly copulate with females at times other than during ovulation.

Wingless, they depend on males to feed, copulate with, and return them to a suitable site to lay their eggs.

Furthermore, testosterone-treated males mount and copulate in a male-like manner while females do not.

However, when multiple males copulate with the same female, postcopulatory sperm competition occurs.

Sperm competition arises when multiple males copulate with a female in a polyandrous system.

Especially twice mated males appeared to copulate for a normal length without transferring any sperm.

The orchids mimic the sex pheromone of receptive female insects, mainly hymenopterans, in order to attract males seeking to copulate.