Lecture 2: Counter Intuitive Behaviour Flashcards Preview

APS209 Animal Behaviour > Lecture 2: Counter Intuitive Behaviour > Flashcards

Flashcards in Lecture 2: Counter Intuitive Behaviour Deck (19):
1

why do humans eat so many sweets and drink so many soft drinks?

Especially the we know its rots teeth, make you obese, leads to diabetes and is COSTLY

2

Infanticide in Hanuman langurs group / individual selection? And what occurs?

INDIVIDUAL
--live in social groups, 1 M and group of F.
-- when a M is displaced they new males kills the old ones young (risk being attacked by females)
-SO infanticide free F become pregnant sooner. The male becomes father sooner and has more offspring before being displaced himself

3

group selection is the idea that

certain characteristics of individuals are adaptive not at the individual level but at the group level
-individual will be doing something good for the group but bad for themselves
-e.g. reproducing less to avoid overexploiting resources

4

what is the problem with group selection

individual selection will usually be stronger. Groups with the characteristics necessary for group selection are rare

5

when are "non-restraining" (selfish) type advantageous? Competition WITHIN groups for space or resources/competition BETWEEN groups for space or resources

Competition WITHIN groups for space --> individuals do better

6

when are "restraining" altruistic type advantageous? Competition WITHIN groups for space or resources/competition BETWEEN groups for space or resources

competition BETWEEN groups for space or resources --> groups do better

7

Alcock discusses infanticide in other species:

including lions, giants waterbeds and jacanas

8

infanticide in meerkats

-meerkats live in social groups, with a dominant female & subordinates
-pregnant females will kill the pups of other females, so their young do not have to compete for resources --> direct benefit

9

self sacrifice in Worker Honey bees

-self sacrifice --> casting off part of body
-barbed sting, easy to go in, hard to come out
-alarm pheromone guides other worker bees to the intruder -> releases highly defensive behaviour
-individual gains benefits as pass on genes by helping fam survive, by leaving sting in the victim works for longer

10

worker honey bees sting contains

muscles, nerve ganglion a venom sac and an alarm pheromone gland

11

alarm pheromone main chemical

-very volatile and smell of bananas, isoamy acetate

12

Sex change in Anthias fish

-Female --> Male
- gains fitness as a large male has greater reproductive potential as female eggs are limited

13

Garden spider: waiting for females to mature

-M smaller than F
-M waits near nest and then waits for female to mature, then plucks nest (differently to how prey would) to gain F attention

14

Crabs spider:

Grabs F legs waits till F stop wriggling ties her in silk, copulates and then leaves her to untangle herself

15

nuptial gift

food gift --> persuade female

16

black widow to types

black widow and redneck spider

17

redback spider: differences in F & M

-Female much larger
-F live longer
-M matures at a younger age
-Many males per female
-multiple mating by females occurs

18

redback copulation

ends in cannibalism of male
-male actually gives himself to feel, almost as a nuptial gift

19

Why do redbacks M give themselves to the F to be cannibalised??

Female is less likely to mate again if she has cannibalised the first male