Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 59, Problem 2CQ
Why does maximum sustainable yield occur at the midpoint of the logistic curve and not where the population is at
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The maximum sustainable yield (MSY) is the
highest rate at which a potentially renewable
resource can be used indefinitely without
reducing its available supply. The idea is to
remove individuals while keeping the
population at a constant growth rate and size,
but to find the size where the harvest is
maximized. The greater the growth rate, the
more individuals you can remove and not
change the population size. Where is the
growth rate at its maximum? To find this look
at your logistic model simulator.
1. Set up a hypothetical salmon population
where the carrying capacity is 20,000 fish,
the maximumr is 0.7. According the the
maximum sustainable yield (MSY), at what
population size should we maintain the
salmon while fishing?
What conditions produce an inverted pyramid of biomass in which the consumers have a greater biomass than the producers? Can you think of an example of an inverted pyramid of numbers in which there are, for example, more herbivores than plants on which they feed?
A population grows according to the logistic model
N =
55
1 + 0.9e−1.4t
,
where t is measured in years and N is measured in thousands.
(a) What is r for this population? per year(b) What is the environmental carrying capacity K? thousand(c) This population is subject to harvesting. What is the optimum yield level? thousand
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Describe the growth at various parts of the S-shaped curve of logistic growth.arrow_forwardWhat are some factors that cause a population to reach carrying capacity?arrow_forwardIn a temperate grassland ecosystem, to tal primary production was 12,740 g/m/yr. Annual net secondary pro duction by the herbivorous insect community was 320.5 g/m2/yr. Total net tertiary production by spiders was 22.6 g/m/yr. Is productivity biomass-based or productivity-based?arrow_forward
- With which population growth model is the Verhulst Pearl equation associated?arrow_forwardWhy do some species tend to grow exponentially while others tend to follow a logistic growth model?arrow_forwardWhere is the growth rate the fastest on a logistic growth curve? at the inflection point in the very beginning when the population is small right before it reaches the carrying capacityarrow_forward
- A population of 200 bass released in a lake began growing at a rate of 100 fish/yr. A second assessment performed at a later date found that there were 400 fish and the population was growing at a rate of 160 fish/yr. (Assume logistic growth dynamics.) Estimate the maximum sustainable yield (MSY) from the population.arrow_forwardA colony of aliens reaches planet Earth in 3000 BC and set up a base in Antarctica. If their initial population is 100 and their specific growth rate is 0.02263/year and their yieid coefficient is 0.85, then in what year (AD) will they start to outcompete humans for resources negiecting resource and logistic growth limiting effects? Assume the human population 3000 BC is 50 million, the human yield coefficient is 0.75 and the human specific growth rate is 0.02/year. Answer:arrow_forwardExplain what carrying capacity means and give the similarities/differences for exponential growth and logistic growth along with the factors that might affect them. will upvote if correctarrow_forward
- In the land between the lakes, Elk and Bison Prairie, we currently have 125 bison and 15 elk. These species are known to compete for some but not all of their resources. We are able to determine that the carrying capacity of the bison K1 is 200 and that the alpha (competition coefficient) is 4. The carrying capacity for Elk (K2) is 100 and the beta (competition coefficient) is 1.arrow_forwardDescribe biotic potential. Describe carrying capacity. How do these two factors affect population growth and the ultimate stable size of a population?arrow_forwardafter the bamboo fruiting: In reality, this high carrying capacity cannot be sustained for longer than a few weeks.When the bamboo fruits and rice run out, the carrying capacity reverts to the levelobserved before the bamboo began to fruit. A). Describe what is happening to the population size.arrow_forward
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