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Which of the following are variable terms in the discrete-time logistic model?
rmax,d
Δt
Nt
ΔN
K
t
None of these
Introduction :
Population growth that is discrete in nature is known as logistic growth. When population changes happen at regular intervals, discrete growth results.
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- A fish population has a per capita birth rate of 10 young per fish and a per capita death rate of 0.3 (= 30% chance of dying). Its carrying capacity is 50,000. What should be your harvest rate if you want to maximize your catch (number of fish) sustainably, i.e. without risk of bringing the population to extinction? Show your calculations. Note that there is no variation in this system.When the of in = do + aN how do we the effects of "a" in this model? Choose at least one correct answer the negative effects of density on per capita birth rates B the density dependent per capita death rate the density independent per capita death rate the density independent growth rate the negative effects of density on per capita death rates E. Dinerent species feed on the nectar from flowers. One interesting example is the case in which bees and moths use the same food resources, but bees gather nectar by day while moths gather nectar by night. This pattern is a good example of: 125 Choose at least one correct answer A commensalism B. niche partitioning C competitive exclusion D intraspecific competition mutualismWrite the BIDE dynamics equation, where the left side of the equation is Nt+1. Realizing you are working with a closed population, put an “X” through the terms you will not need to consider to understand population growth of a species.
- https://media.hhmi.org/biointeractive/click/lionfish-invasion/introduction.html This section starts explaining how scientists use the population survey data that are collected to model how the lionfish population changes over time. These models enable scientists to make predictions about population changes, which is an important element of developing plans for managing the lionfish population You'll be using the discrete-time logistic model that is described on this page in future parts of the case study, so make sure to carefully read through the explanation of this mathematical model. Even if you don't have a strong math background, this case study walks through the equation step by step. 6)Which of the following are constant terms in the discrete-time logistic model? choose all that apply a)Nt b)ΔN c)t d)K e)Δt f)rmax,d g)None of theseThe figure shows the relationship between the growth rates (on a log scale) of individual fish and the similarity of the fish to their competitors. Assuming that populations with faster growth rates are more likely to have greater population growth, which principle or concept does the figure support? 4.0 3.9 드 3.8 3.7 -1.5 Least similar -1.0 -0.5 0.0 0.5 1.0 1.5 Most similar to competitors Morphological index to competitors O A. Competition is most intense when resources are scarce B. Competition can result in character displacement C. Competition is often asymmetrical D. Competition can determine the local distributions of species E. This figure shows no relationship about competition In (growth rate)Use the following information to answer the next question. Predator-prey population cycles prey predator Time Сорy Look Up Share... In the above graph, the points A, B, C, and D represent the following events, in random oraer. 1. Reduction in predator population 2. Reduction in prey population 3. Increase in predator population 4. Increase in prey population The correct order for listing the events represented by A, B, C, and D is » and Number
- Geometric growth refers to the growth of populations that do not have overlap in their generations. Annual plants and some insects are good examples where adults die before young individuals mature to reproduce. Pacific salmon are an example of a vertebrate with geometric growth because spawning (egg laying). The equation for geometric growth is: N=2 No; where 2= finite rate of increase and t=number of time intervals. Question A1. Calculate the population size after 10 time intervals (N10) if No = 120 and 2 = 1.1. Question A2. If N1 =750 and N2 = 890, calculate 2Think about a predator-prey system that perfectly follows Lotka-Volterra dynamics. The search efficiency parameter (a) represents how quickly the predator finds and kills its prey. What would happen if most the predator population had a parasite that made them less effective predators? Infected animals find and kill prey less frequently (that is, the parasite caused the value of the search efficiency parameter to decline). the populations would still cycle; the amplitude of prey and predator would increase Othe populations would no longer cycle; the prey would increase and the predator would go extinct the populations would no longer cycle; the prey would go extinct and the predator would increase the populations would still cycle; the amplitude of prey and predator would decline the predator and prey populations would no longer cycle; the parasite and the predator populations would cycle insteadOpen the Excel Spreadsheet: ACTIVITY Population Biology Data Analysis Perform data analysis for: Tiger Find the "r" value for tiger. Enter the "r" numerical value in the cell to the right of r: (cell B6). Press ENTER after you enter the "r" value for Tiger. Keep No: the default value of 2. What is the projected population number at No (after 6 generations)? Enter the number below as a numerical value.
- For the mathematical model of population growth below, match the equation variables with their correct interpretation. N₁ = Nort t r NO Nt | Unit of time that the growth rate is based on Projected population number Growth rate of the species Initial population numberSuppose there are two different populations of deer that grow exponentially over a period of 20 years. One population has a growth rate (r) of 0.44, and the other population has a growth rate (r) of 0.46. Is the statement below true or false? There will not be much difference in the size (N) of these two populations after 20 years of exponential growth. True O False MacBook Pro G Search or type URL &1 3- LCWhich letter on the graph represents the EXCEEDING phase of the graph? * 600 500 роp 400 size 300 200 B. 100 TIME A D B.