LECTURE 14b - Food Shortages Flashcards Preview

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Flashcards in LECTURE 14b - Food Shortages Deck (14)
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1
Q

When insects are gone in the winter this is a _____ _____ ____

A

Predictable food shortage

2
Q

What are three solutions for predictable food shortages?

A
  • Collect food and store it
  • Hibernate/Dormancy
  • Migration
3
Q

Migration solves a ____ food supply problem

A

predictable

4
Q

What food supplies fluctuate every year and are unpredictable food supplies?

A
  • Seeds and nuts
  • Berries and other fruit
  • Small Mammals
5
Q

Birds are _____ and ______ to find plentiful food supplies. Give three examples of birds for the food supplies of fruit, seeds and small mammals.

A

Nomadic and Irruptive

Bohemian Waxwing (fruit) White Wing Crossbills (seeds) 
Owls (small mammals)
6
Q

What animal impales food on trees to dry them out.

A

Northern Shrike

7
Q

What is an area called with a large number of food stored?

A

Larder

8
Q

How do gray squirrels solve the predictable food shortage?

A

Scatter hoarding (lots of solitary caches)

9
Q

How do Canada Jays solve the predictable food shortage?

A

Scatter hoarding - each stored under the bark of spruce trees

10
Q

What are some special adaptations that the Canada Jay has for helping food stick under bark. (4)

A
  • enlarged salivary glands
  • sticky saliva
  • nest early to start storing food
  • Large spatial memory and hippocampus
11
Q

How do red squirrels solve the predictable food shortage?

A

Create large pinecone caches called middens

12
Q

What physical adaptation do red squirrels have for helping them store food?

A

Expandable cheeks.

13
Q

How do beavers solve the predictable food shortage?

A

Create a central cache of branches next to their lodge as a food pile

14
Q

Adaptations that beavers have that help them store food. (4)

A
  • Create drag trials ( land)
  • Maintain paths in early winter (water)
  • Bubble trails that make ice weaker
  • Break thin ice with their heads