BIOL 4150 Lecture 17: Lecture 17

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ochreherring44

24 Feb 2012

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Ex: the monarch butterfly: the range of milkweed determines the breeding range of the butterfly as it is the only plant, adult female monarchs lay their eggs on the underside of milkweed leaves. These eggs hatch that larvae can eat in three to twelve days: leaves contain toxins that are unpalatable to butterfly predators , adult range much wider: summer food plants; winter pine stands at high elevation. Trade-offs: allocation to growth, defense, or reproduction. the winning strategy is selected via fitness implications (best trade-off in a given environment = the most offspring) predation exerts strong selection pressure on allocation to defense. Case study: invasion by cottony cushion-scale: the cottony cushion-scale (i. purchasi) arrived 1880s from australia, the vedalia beetle"s diet consists specifically of the cottony cushion scale, and was imported. Case study: disease outbreaks in north american tree species.

Related Questions

What is likely to happen when there is an increase inthe population of a prey species?
1. Higher incidence of interactions between prey andpredators.
2. A subsequent increase in the predator population size.
3. More chances for the prey species members to be killed.
4. A and C.
5. None of the above
Which of the following is an example ofevolution?
1. The ability of human adults to digest lactose.
2. A tall giraffe that can eat plants that other members of itsspecies cannot reach.
3. A bacterium that survives antibiotic treatment.
4. All of the above are correct.
5. None of the above.

pinkox999

What is likely to happen when there is an increase inthe population of a prey species?
1. Higher incidence of interactions between prey andpredators.
2. A subsequent increase in the predator population size.
3. More chances for the prey species members to be killed.
4. A and C.
5. None of the above
Which of the following is an example ofevolution?
1. The ability of human adults to digest lactose.
2. A tall giraffe that can eat plants that other members of itsspecies cannot reach.
3. A bacterium that survives antibiotic treatment.
4. All of the above are correct.
5. None of the above.

orangezebra314

1. You have been studying a population of bluebirds. You visitedthe site each summer and counted the number of birds. Your data areas follows:

Year	Birds
2003	205
2004	240
2005	265
2006	281

What was ? (lambda) in 2004, 2005, 2006?

2004: lambda=?

2005: lambda=?

2006: lambda=?

2. Suppose you are reading a scientific paper that comparesseveral insect populations in a prairie. You see the followingtable:

Species	?
Grasshopper	1.07
Monarch Butterfly	0.86
Leaf Hopper	1.15
Bumblebee	1.00
Honeybee	0.75

Which populations are increasing insize?

Which are decreasing?

Which are stable?

Will you ever see a ? less than zero?Why?

azurecheetah525

BIOL 4150 Lecture 17: Lecture 17

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