Biology 2483A Lecture Notes - Lecture 7: Eyestalk, Pipefish, Sexy Son Hypothesis
27 Feb 2017
School
Department
Course
Professor
Document Summary
Animals make behavioral choices that enhance their energy gain and reduce their risk of becoming prey. Mating behaviors reflect the costs and benefits of parental investment and mate defense. There are advantages and disadvantages to living in groups. An evolutionary approach to the study of behavior leads to testable predictions. Adult male lions often kill the cubs of another male in the pride. Young adult male lions are driven out fro(cid:373) the pride a(cid:374)d (cid:373)ay for(cid:373) (cid:862)(cid:271)a(cid:272)helor prides(cid:863) with other young adult lions that hunt together. At 4 or 5 years, a male can challenge adult males in an established pride. A female lion will become sexually receptive soon after her cubs are killed, as opposed to 2 years. If successful, the new male may kill cubs recently sired by the vanquished male. if she has cubs. The new male is increasing the chances that he will sire cubs before he is replaced by another, younger male.
