BIOL 190 Lecture Notes - Lecture 32: Mate Choice, Limiting Factor, Naked Mole-Rat

• School: University of San Diego
• Department: Biology Courses
• Course: BIOL 190
• Professor: Leavitt, Dean

Document Summary

Female investment in offspring (eggs and pregnancy) is greater than male investment (sperm) Eggs are large store energy a nd nutrients few available per individual. Con ict males attempt as many matings as possible increases reproductive success. Close relatives of sea-horses: male provides parental car and choose female in this case a few females have most mates and offspring. Therefore, con ict driven by whichever sex has parental care, not gender. Generally, access to female is a limiting resource: males compete for females. Reversed in some cases (sea horses: male to male competition. Combat: males ght or challenge males for access may be over optimal nesting areas or resources favorable to females, males with more elaborate traits do better body size, horns/antlers. Ex: elephant seals have large harems and sire more offspring. High variance ins reproductive success many males have low productivity. Order of mating, amount of sperm structure to remove previous sperm deposits determine success.