07-parental%20behavior

07-parental%20behavior - Parental behavior. Although...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Parental behavior. Although courtship and mating are the fun part, reproduction certainly doesnt end there. In fact, its just starting. If you want to pass your genes on to the next generation, you have to care for and nurture your offspring until they can go off and fend for themselves. Depending on your species, this can take a very long time. (But its all worth it.) Because of the tremendous energetic and temporal demands of parental care, environmental conditions have to be just right for reproduction to occur. Many species use food availability or day length to determine the time of mating so that the young will be born at a time when food is available. There is no common theme to parental behavior among vertebrates - or even mammals, for that matter. 1. Biparental versus uniparental: >90% of birds are biparental >90% of mammals are uniparental In 100% of mammals, the female is involved in parental care Why? But male mammary glands can be induced to grow and produce milk witches milk There is no common theme to parental behavior among vertebrates - or even mammals, for that matter. 2. Precocial versus altricial young: Some species give birth to precocial young: offspring that are capable of moving independently, maintaining their body temperature, hearing, and seeing shortly after birth. Examples: horses, cattle, elephants, guinea pigs But these little critters still need to be nursed, protected and cared for until they can fend for themselves. There is no common theme to parental behavior among vertebrates - or even mammals, for that matter. 2. Precocial versus altricial young: Other species give birth to altricial young: offspring that are very immature. They may be blind, deaf, furless, unable to maintain body temperature, unable to urinate and defecate, etc . Examples: rats, mice, hamsters, dogs, cats Rat pups Rat pup Dog pups There is no common theme to parental behavior among vertebrates - or even mammals, for that matter. 2. Precocial versus altricial young: Most primate species arent clearly precocial or altricial . They can hear, see, maintain their body temperatures, urinate and defecate (can they ever!). But they cant fend for themselves at all. There is no common theme to parental behavior among vertebrates - or even mammals, for that matter. 3. Continuous versus intermittent care: Some species spend relatively little time on parental care. Tree shrews deposit their offspring in an arboreal nest (in a tree) and visit once every 48 hr. Rabbits spend about 3 minutes a day with their babies. Inject some milk and then split. Other species ( e.g. , primates) are in nearly continuous contact with their infants. Most of what we know about the neuroendocrinology of rat maternal behavior is due to the research of Jay Rosenblatt and his academic offspring. The basics of rat pregnancy and lactation....
View Full Document

Page1 / 46

07-parental%20behavior - Parental behavior. Although...

This preview shows document pages 1 - 16. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online