Innate behaviours

1
Innate behaviours

• Territory, society, competition and co-operation

2
Social Interaction

• Involves 2 or more individuals
• Eg. Competition, aggression, co-operation,
  courtship

3
Behaviours identify

• Different species behave in slightly different
  ways. This allows members of one species to
  identify members of their own species.
• Example table 11.4 pg 353. Two species of ravens
  behave slightly differently. This is especially
  important for successful mating and reproduction.

4
Group organisation

• Groups may be formed for a variety of reasons
• Dolphins form groups to herd fish
• Jays (bird type) group to care for young
• A couple come together to mate
• For protection
• For shelter

5
Caste systems

• Caste systems are found in bees, wasps, ants.
• Caste is like the class of the individual. Where
  it fits in with others, and its role.

Ants Ants Ants
Reproductive caste Sterile workers (food collection) Soldier
6
Social hierarchies

• Pecking order
• Dominance
• Animals learn their place by challenging members
  of the group. If they lose, they will not
  challenge that member again
• Stronger animals more likely to have offspring,
  which means offspring are generally also strong.

7
Dominance behaviour
http//www.teachertube.com/viewVideo.php?video_id
43811titleLowland_gorilla_display_of_dominancer
efCampme86
8
Leadership

• Baboons
• One or two dominant males
• Many subordinate males
• Many females and young
• Dominant males protect group members safer than
  solitary animals
• Dominant males get first priority mating partners
• When moving, strong males lead, followed by the
  dominant male, females and young. Young males are
  last.

9
Territoriality

• Select and guard a territory
• From competitors for resources
• From predators
• Eg. Magpies swooping

10
Competition

• For resources
• Eg. Birds compete for nest space
• Seagulls squabble over food morsel
• Crickets fight over mating partners

11
Co-operation

• Helping each other
• Pack animals hunt together
• Meerkats look out for danger

12
Innate behaviours can change

• May not be fully developed at birth
• May not be needed at all ages
• Innate behaviour can be built upon by learned
  behaviour eg. The walking motion in babies is
  further built upon by learning to balance

13
Laughing gull chick

• Chicks peck at parents red beak in order to
  trigger regurgitation
• Day 1 1/3 of pecks are accurate
• Day 2 ½ accurate
• Day 3 more than ¾ accurate
• May learn quicker from siblings

14
Activities

• Glossary behaviour, innate, learned, rhythmic
  behaviour, communication, pheromones, caste,
  hierarchy, competition, aggression, co-operation.
• Quick Check questions pg 357
• Chapter review pg 369 question 2, 5, 9