An unresolved question in sexual selection research is whether different secondary sexual traits are developmentally independent or instead whether their degree of expression is a manifestation of a general resource pool (i.e., condition) within the organism. If degree of expression of different...

Many vertebrate and invertebrate taxa have the ability to autotomize and later regenerate appendages and with this process come both costs and benefits. For example, an animal might lose a leg to avoid a predator but as a result become a less effective predator itself. These impacts of autotomy...