• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
MATHEMATICAL MODELS IN POPULATION DYNAMICS BY
MATHEMATICAL MODELS IN POPULATION DYNAMICS BY

... equations. Other manifestations are frequently found in partial differential equations ...
Name: Block:______ Date:______ Limiting Factors Worksheet For
Name: Block:______ Date:______ Limiting Factors Worksheet For

... For Questions 1–6, write “True” if the statement is true. If the statement is false, change the underlined word to make the statement true _________1. Limiting factors determine the immigration capacity of a population. _________2. A limiting factor controls the growth of a population. _________3. L ...
Population ecology PPT
Population ecology PPT

... Evolution and Life History Diversity • Species that exhibit semelparity, or big-bang reproduction, reproduce once and die • Species that exhibit iteroparity, or repeated reproduction, produce offspring repeatedly • Highly variable or unpredictable environments likely favor big-bang reproduction, wh ...
Ecological and Evolutionary Consequences of
Ecological and Evolutionary Consequences of

... small offshore islands as a result of the availability of the bird pollinators for pollination? a. On the mainland (few pollinators), birth rate is low and population size will likely decrease. ...
Energy Flow - SchoolRack
Energy Flow - SchoolRack

... • The size of a population can also change when individuals move into or out of the population. • Immigration means moving INTO a population • Emigration means leaving a population ...
Population dynamics - The Deer Initiative
Population dynamics - The Deer Initiative

... to reach the absolute carrying capacity, it is not likely to be good for the deer or their habitat. This implies that most deer populations require some management to hold them at least at the SCC. Human interests (e.g. preventing damage to crops or sensitive habitats) may dictate a further reductio ...
Energy Flow - SchoolRack
Energy Flow - SchoolRack

... • The size of a population can also change when individuals move into or out of the population. • Immigration means moving INTO a population • Emigration means leaving a population ...
What is our impact on Biodiversity - Barbara and Kris` Division II MST
What is our impact on Biodiversity - Barbara and Kris` Division II MST

... Black-footed ferret population numbers were frightfully reduced by the 1950s, and feared extinct in 1979! A small population was discovered in Wyoming in 1981, but that population was nearly wiped out by a plague, followed by an epidemic of canine distemper. The last 18 survivors of the population w ...
Will Small Population Sizes Warn Us of Impending Extinctions?
Will Small Population Sizes Warn Us of Impending Extinctions?

... However, when consumer death rate increases steadily over time, both consumer and resource populations lag behind their equilibrium densities. The difference between current density and the equilibrium density for current conditions increases as the rate of environmental change increases relative to ...
Florida 4-H Environmental Education Activities
Florida 4-H Environmental Education Activities

... population size of the predator in an inverse relationship. Under controlled laboratory conditions, situations have been observed in which both the predator and the prey may be eliminated. In natural systems, extinction of populations caused by predation is much more rare. Extinction of an organism ...
limitingfactors.cdr
limitingfactors.cdr

... If temperatures vary too much out of this range the species will either die or move to a different location. Temperature also influences the chemical properties of water. The rate of chemical reactions in the water increases as temperature increases. For example, warm water holds less oxygen than co ...
Chapter 12
Chapter 12

... c) decline as predators die. d) decline at first, but then increase as predators switch to other modes of feeding. e) decline at first, but then reach a small equilibrium population size. Answer: C 11. In the Lotka-Volterra predation model, the predator death rate is represented by a) c. b) p. c) cp ...
video slide - Course
video slide - Course

... • Life history traits favored by natural selection may vary with population density and environmental conditions. • K-selection = density-dependent selection, selects for life history traits that are sensitive to population density. • r-selection = or density-independent selection, selects for life ...
Chapter 5 Powerpoint ch5powerpoint
Chapter 5 Powerpoint ch5powerpoint

...  If the number of individuals added by births & immigration are balanced by those lost by deaths & emigration then there is zero population growth;  populations vary in their capacity for growth, also known as biotic potential;  the intrinsic rate of growth (r) is the rate at which a population w ...
File - Pedersen Science
File - Pedersen Science

... • Life history traits favored by natural selection may vary with population density and environmental conditions. • K-selection = density-dependent selection, selects for life history traits that are sensitive to population density. • r-selection = or density-independent selection, selects for life ...
Population Ecology
Population Ecology

... proportional to the size of the population.  if it has the perfect environment. Limited to short periods and small areas.  Population multiplies quickly.  All populations grow exponentially until some limiting factor slows the population’s growth. J-Curve This is mostly unrealistic. ...
Chapter 53 Population Ecology Powerpoint
Chapter 53 Population Ecology Powerpoint

... • Life history traits favored by natural selection may vary with population density and environmental conditions. • K-selection = density-dependent selection, selects for life history traits that are sensitive to population density. • r-selection = or density-independent selection, selects for life ...
Concordia University BASIC POPULATION ECOLOGY (BIOL 351/4
Concordia University BASIC POPULATION ECOLOGY (BIOL 351/4

... Office Hours: XXXXXX or by appointment Email: XXXXXXXXXXX (Include BIOL 351 in the subject line of your email). ...
4.1: Communities and ecosystems
4.1: Communities and ecosystems

... populations get larger and therefore reduces the number of individuals who can reproduce. Predators can hunt more successfully as the prey population increases, which in turn increases the population of predators (negative feedback). Resources become scarce when a population is large, which in turn ...
BIOL 1020 – ECOLOGY UNIT LECTURE NOTES 1 of 5 Ecology I
BIOL 1020 – ECOLOGY UNIT LECTURE NOTES 1 of 5 Ecology I

... A. Ecology is the scientific study of interactions between ___________ 1. term ecology comes from the Greek oikos, _______, and logos, to study B. biotic and abiotic factors 1. What are biotic factors? Give examples. ...
ecology
ecology

... A. Ecology is the scientific study of interactions between ___________ 1. term ecology comes from the Greek oikos, _______, and logos, to study B. biotic and abiotic factors 1. What are biotic factors? Give examples. ...
Chapter 52
Chapter 52

... - max. population the environment can support without degrading the habitat Determined by: The species itself and the environment (resources available, predation, etc…) **Carrying capacity if obviously not fixed. It depends on abundance of limiting resources at a particular space and time. Figure ou ...
Life History Strategies: Trade-offs with reproduction and survival
Life History Strategies: Trade-offs with reproduction and survival

... condition-dependent decision rules governing an organisms scheduling of allocation of resources towards growth, survival and reproduction. ...
ICS Final Exam Study Guide
ICS Final Exam Study Guide

... Density- dependent limiting factor-a limiting factor that depends on population size. Predator- prey relationship-one of the best known mechanisms of population control. Density-independent limiting factors- affect all populations similar ways, regardless of the population size. Review Question: 1. ...
Download chapter 3
Download chapter 3

... highly degraded and fragmented habitats. In many cases, it is not clear how to define separate populations, since this requires knowledge of mechanisms for gene flow within and between populations for the different species, which can only be generally characterized at this point. Throughout the MVP ...
< 1 ... 23 24 25 26 27 28 29 30 31 ... 105 >

Maximum sustainable yield

In population ecology and economics, maximum sustainable yield or MSY is theoretically, the largest yield (or catch) that can be taken from a species' stock over an indefinite period. Fundamental to the notion of sustainable harvest, the concept of MSY aims to maintain the population size at the point of maximum growth rate by harvesting the individuals that would normally be added to the population, allowing the population to continue to be productive indefinitely. Under the assumption of logistic growth, resource limitation does not constrain individuals’ reproductive rates when populations are small, but because there are few individuals, the overall yield is small. At intermediate population densities, also represented by half the carrying capacity, individuals are able to breed to their maximum rate. At this point, called the maximum sustainable yield, there is a surplus of individuals that can be harvested because growth of the population is at its maximum point due to the large number of reproducing individuals. Above this point, density dependent factors increasingly limit breeding until the population reaches carrying capacity. At this point, there are no surplus individuals to be harvested and yield drops to zero. The maximum sustainable yield is usually higher than the optimum sustainable yield and maximum economic yield.MSY is extensively used for fisheries management. Unlike the logistic (Schaefer) model, MSY has been refined in most modern fisheries models and occurs at around 30% of the unexploited population size. This fraction differs among populations depending on the life history of the species and the age-specific selectivity of the fishing method.However, the approach has been widely criticized as ignoring several key factors involved in fisheries management and has led to the devastating collapse of many fisheries. As a simple calculation, it ignores the size and age of the animal being taken, its reproductive status, and it focuses solely on the species in question, ignoring the damage to the ecosystem caused by the designated level of exploitation and the issue of bycatch. Among conservation biologists it is widely regarded as dangerous and misused.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report