Allomothering Flashcards Preview

Year 3: Primate Ecology and Behaviour > Allomothering > Flashcards

Flashcards in Allomothering Deck (15):
1

What is allomothering?

Care of an infant from a non-parent

2

Is allomothering more likely to occur in species with altricial or precocial young?

Altricial, because they are helpless

3

Give 3 direct benefits to the mother of allomothering.

1. Decreased risk of predation
2. Conservation of energy
3. Can increase reproductive output

4

If a mother dies, is adoption of her infant more likely in a society with allomothering?

Yes

5

What is a benefit of allomothering for the infant?

It has an increased likelihood of survival

6

What is an indirect benefit of allomothering for the mother?

By ensuring her infant's survival she ensures that her genes will be passed on to the next generation, non-altruistic

7

Why is allomothering beneficial to the group? Give 2 reasons.

1. Disseminates maternal skills around the group, allowing younger females to gain mothering experience
2. Shared affection for the infant enhances social cohesion

8

What percentage of mammals display allomothering?

3%

9

Which mammal group shows the highest rates of allomothering?

Primates

10

What does allomothering depend on, like many other traits in socioecology?

Food availability

11

What affects allomothering in primates? Give 3 factors?

1. Seasonality
2. Predation
3. Competition

12

How would seasonality affect allomothering?

Seasonality decreases food availability, thus increasing intra-sexual competition between females. Therefore they are less likely to allomother.

13

How would competition affect allomothering?

If females are competing for food their priority is food intake, not looking after someone else's baby.

14

Therefore allomothering should be more likely in groups with which kind of feeding competition?

Those that face scramble competition, i.e. folivores

15

What is the Grandmother Hypothesis?

Females live past reproductive age to help rear their grandoffspring
Reproduction is v. costly but helping kin to reproduce is less so
Their genes are still passed on to the next generation

Altruism? Natural or forced?