Coughing may also be used for social reasons, such as coughing before giving a displacement behaviors or defense mechanisms.
3.
:: : Your note about the displacement behavior reminds me of a funny incident I observed while sailing with some friends recently.
4.
When post-feeding larvae venture away from the body to pupate, as is common for most blowflies, displacement behavior becomes the determining factor of age.
5.
"' Normal contact stiffness "'is a physical quantity related to the generalized force displacement behavior of rough surfaces in contact with a rigid body or a second similar rough surface.
6.
If a displacement behavior served an adaptive function, such as increased survival of the young, then it may have experienced positive selection and become ritualized and stereotyped in its new context.