@article{Monge_2019, title={The persistent embrace of onychophorans: What determines copulation duration in velvet worms?}, url={https://revistas.ucr.ac.cr/index.php/rbt/article/view/36161}, abstractNote={<p><strong>In the only </strong><strong>onychophorans mating</strong><strong> that has been photographed, instead of fleeing, the couple remained together despite being manipulated. Why? The duration of copulation in </strong><strong>onychophorans</strong><strong> is possibly controlled by the female, larger and stronger than the male, probably with the participation of dopamine and γ-aminobutyric acid. Insemination through the body wall can be a male mechanism to overcome female defenses.</strong></p>}, number={1}, journal={Revista de Biología Tropical}, author={Monge, Julián}, year={2019}, month={Feb.}, pages={Darwin} }