BIOL 290 Chapter Notes - Chapter 3: Ontogeny, Precocial, Zygote
Document Summary
Search time: time required to search for a prey item: profitability is also effected by search time, when search time is not 0, profitability: e/h+s, h= handling time, e= energy. S= search time: costs and benefits, displays: a way to settle conflict; used to advertise certain attrivutes. Polygynous species: each successful male mates with multiple females, females with one male. Monogamous: paired for entire breeding system; males and females take one mate. Polyandry: females mate with more than one male, while males mate with only one female. Polygynandry: both males and females take multiple mates: ansiogamy: formation of zygote where two gametes were unequal in size and form. Sexual selection: explains why males and females adopt different sexual strategies and why the two sexes are dimorphic (look quite distinct) Intrasexual selection: usually two males competing for mating opportunities; drives evolution of secondary sexual characteristics; size, antlers ect.
