Class12_Reproductive+Behavior - What is Sexual Behavior...

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1 Reproductive Behavior What is Sexual Behavior? • Behavior that has evolved to bring sperm and eggs together Sex drive is the motivational forces that propel individuals to seek mates Field and lab suggest males will do just about anything to mate with females…. . For example: bull elephant seals will…. •go without food for 3 months •migrate 6000 miles •fight with vigorously with other males Rats will cross electrified grids and endure significant pain to mate……. Outline • Appetitive phase – Overview – Pheremones • Consummatory phase – Hormones – Female circuit – Male circuit • Parental behavior Male Reproductive Patterns 1) Appetitive Phase Includes all behaviors that will gain access to mates Sexual Motivation Libido Courtship Male sexual behavior can be divided into 2 Phases 2) Consummatory Phase ! When copulation occurs ! Sexual Performance ! Potency Appetitive phase Consummatory phase
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2 Appetitive Behavior Appetitive behaviors establish, maintain, or promote sexual interaction. Appetitive behavior varies widely across species Male Appetitive Behavior • Can involve a wide range of behaviors – Vocal displays – Physical displays – Grooming • Often reflect strength/vigor or ability to be a good parent Female Appetitive Behavior Female appetitive behavior often called proceptive Rats Wiggling their ears Primates – Vocalizations, approach/withdraw Pheremones • Pheremone: a chemical signal is released outside the body of an animal and affects other members of the same species – Are usually non-volatile, you have to get up close to detect them (Flehmen response) Pheromones and Reproductive Behavior Prostaglandin F stimulates ovulation in female goldfish and is detected by males In mammals pheromones are usually detected by the vomeronasal organ Pheromones and Reproduction Pheromones from male prairie vole can accelerate onset of puberty in females Musth is a period of increased activity in male elephants – sexual status is marked by different pheromones
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Class12_Reproductive+Behavior - What is Sexual Behavior...

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