BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
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?
In 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?
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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_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_forwardWhy do some species tend to grow exponentially while others tend to follow a logistic growth model?arrow_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_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_forwardDescribe biotic potential. Describe carrying capacity. How do these two factors affect population growth and the ultimate stable size of a population?arrow_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_forwardWhy does the growth curve line become flat after initially increasing? The population growth rate has slowed. The population growth rate has increased. The population has reached maximum sustainable yield. The population is experiencing density-independent growth.arrow_forwardIn constructing a mathematical model for population growth of tilapia grown in fishpens, which factor(s) may be included in model.arrow_forward
- The growth of a population of natural resources (such as hardwood trees) over time is illustrated by the graph. Two significant pieces of information are included: the environment's carrying capacity and the maximum sustainable yield. The environment's carrying capacity is the point at which all available resources are being used by the organisms in the population, and the maximum sustainable yield is the point at which the highest number of the population are being harvested without impairing the populations' growth. (see pic.) Identify the assumptions about population growth that are implicit in the figure. (multiple answers can be chosen.) A) The environment's carrying capacity does not change over time due to any increase or decrease of resource availability. B) The population grows logistically until it nears the environment's carrying capacity and does not diverge from this rate over time. C) The maximum sustainable yield grows logistically until it reaches the…arrow_forwardA fishprint provides a measure of a country’s fish harvestin terms of area. The unit of area used in fishprint analysisis the global hectare (gha), a unit weighted to reflect therelative ecological productivity of the area fished. Whencompared with the fishing area’s sustainable biocapacity (itsability to provide a stable supply of fish year after year,expressed in terms of yield per area), its fishprint indicateswhether the country’s annual fishing harvest is sustainable. The fishprint and biocapacity are calculated using thefollowing formulas:Fishprint in (gha) = metric tons of fish harvestedper year/productivity in metric tons per hectare ×weighting factorBiocapacity in (gha) = sustained yield of fish in metrictons per year/productivity in metric tons per hectare ×weighting factorThe following graph shows the earth’s total fishprint andbiocapacity between 1950 and 2000. Study it and answerthe following questions: If biologists determine that this country’s sustainedyield of fish is…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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