LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 9781319145125
Author: Sadava
Publisher: MAC HIGHER
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Chapter 54, Problem 5Q
Summary Introduction
To review:
The shark population with a higher r-value and the shark population that has a higher chance of being overfished.
Introduction:
The tropical Australian sharpnose shark is small in size, fast-growing, has a short lifespan, matures early, and produces many offspring. The temperate shark is larger in size, slow-growing, has a longer lifespan, matures late in its life, and produces a few offspring.
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Students have asked these similar questions
Describe the current population of Great White Sharks ( abundance, density,dispersion, dispersal ability )
The graph shows the population size and amount of genetic variation in the Sarotherodon galilaeus fish population over a period of time.
Overfishing of S. galilaeus in 2008 led to a drastic decline in their population size. Although the population has since increased, the genetic variation in S. galilaeus is still low. At which point on the graph was the population most vulnerable to the bottleneck effect due to a natural disaster and why?
A. Y, because the population is small and there is low genetic diversity
B. Z, because the population is large but the genetic diversity has remained low
C. X, because the population is too large and has exceeded its carrying capacity
D. W, because the population is just starting out and natural selection is still taking place
New Zealand snapper populations were found to be under the influence of genetic drift, suggesting overfishing was still an issue for them, despite the New Zealand fisheries estimating their total population size to be over 3 million. Which of the following is the best explanation for this observation?
A) Pelagic fish, like the New Zealand snapper, often only have a few reproductive individuals, therefore their effective population size is actually much smaller than the total population size.
B) Pelagic fish, like the New Zealand snapper, often have an equal sex ratio which affects the number of breeding individuals.
C) Pelagic fish, like the New Zealand snapper, often have disassortative mating which affects the number of breeding individuals.
D) Pelagic fish, like the New Zealand snapper, often have assortative mating which affects the number of breeding individuals.
Chapter 54 Solutions
LIFE: THE SCIENCE OF BIOLOGY
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