Population spatial structure, human
... There are practical implications of this finding. For example it suggests that, given a certain amount of habitat loss due to ...
... There are practical implications of this finding. For example it suggests that, given a certain amount of habitat loss due to ...
Keeping the herds healthy and alert - People
... There are limitations on this result as excessive predation can have a greater impact than parasitism (in which case the population is regulated by the predators). Thus, ‘host release’ is only expected when initial predation rates are low to moderate (Fig. 3b). The results of these models are more s ...
... There are limitations on this result as excessive predation can have a greater impact than parasitism (in which case the population is regulated by the predators). Thus, ‘host release’ is only expected when initial predation rates are low to moderate (Fig. 3b). The results of these models are more s ...
Rebuilding Global Fisheries - Department of Marine and Coastal
... sustainable yield (MMSY) and decrease thereafter. In this example, the corresponding exploitation rate that gives maximum yield uMMSY is ~0.45, and total community biomass BMMSY equilibrates at ~35% of unfished biomass (Fig. 2). Overfishing occurs when u exceeds uMMSY, whereas rebuilding requires re ...
... sustainable yield (MMSY) and decrease thereafter. In this example, the corresponding exploitation rate that gives maximum yield uMMSY is ~0.45, and total community biomass BMMSY equilibrates at ~35% of unfished biomass (Fig. 2). Overfishing occurs when u exceeds uMMSY, whereas rebuilding requires re ...
Dens et al.
... As a complement to fitting the Lotka – Volterra competition model to experimental data, population density time series can be simulated for scenarios consisting of specified values of the model parameters and initial population densities. For illustrative purposes, consider a simple, two-species mic ...
... As a complement to fitting the Lotka – Volterra competition model to experimental data, population density time series can be simulated for scenarios consisting of specified values of the model parameters and initial population densities. For illustrative purposes, consider a simple, two-species mic ...
spatial selection and inheritance: applying evolutionary concepts to
... relationship with predictions from the breeder’s equation (Fig. 1A), and after several generations k approached an asymptotic value that was inversely related to median dispersal distance (Fig. 1B). For certain parameter values, spatial selection and inheritance caused k to reach an asymptotic value ...
... relationship with predictions from the breeder’s equation (Fig. 1A), and after several generations k approached an asymptotic value that was inversely related to median dispersal distance (Fig. 1B). For certain parameter values, spatial selection and inheritance caused k to reach an asymptotic value ...
Pulsed resources and community dynamics of consumers in
... Similar patterns of community response to masting appear to occur in temperate forests throughout the world. In beech (Nothofagus spp.) forests of New Zealand, mast production stimulates high overwinter survival and subsequent summer peaks in the population density of introduced house mice (Mus musc ...
... Similar patterns of community response to masting appear to occur in temperate forests throughout the world. In beech (Nothofagus spp.) forests of New Zealand, mast production stimulates high overwinter survival and subsequent summer peaks in the population density of introduced house mice (Mus musc ...
Estimating cost functions for the four large carnivores in Sweden
... f(·) represents the predators' numerical response. To proceed with step 1 it is necessary to focus on the function g(N, P), which is commonly known as the predator functional response. As demonstrated in Eqs. (1) and (2) there is a feedback effect in the sense that the prey population influences the ...
... f(·) represents the predators' numerical response. To proceed with step 1 it is necessary to focus on the function g(N, P), which is commonly known as the predator functional response. As demonstrated in Eqs. (1) and (2) there is a feedback effect in the sense that the prey population influences the ...
Comparative growth rates and yields of ciliates and heterotrophic
... species studied here showed that there was no single explanation for this growth rate disparity. Heterotrophic dinoflagellates exhibited both low ingestion rates and, in one case, low yields; ciliates were able to achieve higher growth rates via either higher ingestion rates or higher yields, depend ...
... species studied here showed that there was no single explanation for this growth rate disparity. Heterotrophic dinoflagellates exhibited both low ingestion rates and, in one case, low yields; ciliates were able to achieve higher growth rates via either higher ingestion rates or higher yields, depend ...
Effect of experimental manipulation on survival and recruitment of
... age classes and sexes, almost doubling mortality resulting from hunting alone. The nearly equal population growth rates in the moderately and heavily harvested populations indicate that as annual survival was reduced, recruitment rates (which included both reproduction and immigration) increased in ...
... age classes and sexes, almost doubling mortality resulting from hunting alone. The nearly equal population growth rates in the moderately and heavily harvested populations indicate that as annual survival was reduced, recruitment rates (which included both reproduction and immigration) increased in ...
Limitation of population recovery - Cooperative Institute for the North
... growth rates (Gardmark et al. 2003). To the extent that the population is recovering from a decline, density-dependent factors may be unimportant (unless, perhaps, the decline has been severe enough to trigger an Allee effect), which allows linear demographic analysis to be applied in a powerful fas ...
... growth rates (Gardmark et al. 2003). To the extent that the population is recovering from a decline, density-dependent factors may be unimportant (unless, perhaps, the decline has been severe enough to trigger an Allee effect), which allows linear demographic analysis to be applied in a powerful fas ...
ecology culminating project
... Extend your thinking: In North America, many top predators, such as wolves, have been driven nearly to extinction. What effect do you think this has on their main prey, deer? Write your answer below, and/or discuss with your classmates and teacher. ...
... Extend your thinking: In North America, many top predators, such as wolves, have been driven nearly to extinction. What effect do you think this has on their main prey, deer? Write your answer below, and/or discuss with your classmates and teacher. ...
Part I: chapters, but I will cover them rapidly. The outlines will be
... graph, add a third line that approximates a population with an exponential value of 1.25. ...
... graph, add a third line that approximates a population with an exponential value of 1.25. ...
Predation
... All these models make a series of simplifying assumptions • A homogenous world in which there are no refuges for the prey or different habitats. • There is one predator species eating one prey species and there are no other species involved in the dynamics of these two populations • Relaxing these ...
... All these models make a series of simplifying assumptions • A homogenous world in which there are no refuges for the prey or different habitats. • There is one predator species eating one prey species and there are no other species involved in the dynamics of these two populations • Relaxing these ...
Successful Invasion of a Food Web in a Chemostat
... populations but only m of them have at least one predator. For example, in the food web in Figure 2 there are n = 3 competitors, but only m = 2 of them have at least one predator population. ‘I’= { i,, i, } = { 1,3}. Also, r,, indicates how many predators the i,th competitor has. In Figure 2, compet ...
... populations but only m of them have at least one predator. For example, in the food web in Figure 2 there are n = 3 competitors, but only m = 2 of them have at least one predator population. ‘I’= { i,, i, } = { 1,3}. Also, r,, indicates how many predators the i,th competitor has. In Figure 2, compet ...
Marine Science - Mathematics and Statistics
... effects of balanced and other patterns of exploitation on marine ecosystems (for background on size-spectra dynamics, see Benoı̂t and Rochet, 2004; Andersen and Beyer, 2006; Blanchard et al., 2009; Datta et al., 2010). The paper develops an approach taken by Rochet and Benoı̂t (2011) who found varia ...
... effects of balanced and other patterns of exploitation on marine ecosystems (for background on size-spectra dynamics, see Benoı̂t and Rochet, 2004; Andersen and Beyer, 2006; Blanchard et al., 2009; Datta et al., 2010). The paper develops an approach taken by Rochet and Benoı̂t (2011) who found varia ...
Workshop on Predation – Thomas Herbert, Ph.D. I. Basics of the
... migrate to an area where there are others of your species. 5. (Lynx) Recall the data on the relationship between lynx and hare populations as analyzed by MacLulich. What is your relationship to the trappers? (Consider all possibilities.) Predation: The trappers are your predators when they trap you. ...
... migrate to an area where there are others of your species. 5. (Lynx) Recall the data on the relationship between lynx and hare populations as analyzed by MacLulich. What is your relationship to the trappers? (Consider all possibilities.) Predation: The trappers are your predators when they trap you. ...
Climate change and southern calamary
... Thus, with respect to potential changes in growth rate of the Tasmanian population under a regime of elevated temperatures, several outcomes (not mutually exclusive) are possible. Firstly, if individuals are able to obtain sufficient resources (both food and oxygen, see below) growth rates will incr ...
... Thus, with respect to potential changes in growth rate of the Tasmanian population under a regime of elevated temperatures, several outcomes (not mutually exclusive) are possible. Firstly, if individuals are able to obtain sufficient resources (both food and oxygen, see below) growth rates will incr ...
A severe predator-induced population decline predicted
... However recent research has revealed two important details about swift parrot ecology. First, spatio-temporal fluctuation in food availability drives unpredictable annual movements by swift parrots, causing the population to select entirely different breeding sites each year across a breeding range o ...
... However recent research has revealed two important details about swift parrot ecology. First, spatio-temporal fluctuation in food availability drives unpredictable annual movements by swift parrots, causing the population to select entirely different breeding sites each year across a breeding range o ...
File - Science Source
... Ecosystems Unit of the 6th grade Scope Science Curriculum. A test blue print is included for the summative unit test. The blueprint describes the content to be assessed with selected response, constructed response, and performance assessments. In addition, the packet includes suggestions and ...
... Ecosystems Unit of the 6th grade Scope Science Curriculum. A test blue print is included for the summative unit test. The blueprint describes the content to be assessed with selected response, constructed response, and performance assessments. In addition, the packet includes suggestions and ...
Document
... dealers are now starting to look elsewhere. The tentacles of that octopus have spread all the way to North America.“ -Dr. John Behler, Freshwater Tortoise & Turtle Specialists Group ...
... dealers are now starting to look elsewhere. The tentacles of that octopus have spread all the way to North America.“ -Dr. John Behler, Freshwater Tortoise & Turtle Specialists Group ...
INTRODUCTION
... Extend your thinking: In North America, many top predators, such as wolves, have been driven nearly to extinction. What effect do you think this has on their main prey, deer? Write your answer on a separate sheet, and/or discuss with your classmates and teacher. ...
... Extend your thinking: In North America, many top predators, such as wolves, have been driven nearly to extinction. What effect do you think this has on their main prey, deer? Write your answer on a separate sheet, and/or discuss with your classmates and teacher. ...
DENSITY AND SIZE CLASS DISTRIBUTION OF YELLOW
... indicated that no slider turtles were present (Lewis 1946), suggesting the turtles likely colonized at some point after the golf course wetlands were created. Thus, although density at BHI is currently very high, further monitoring is needed to observe long-term changes to this population. Density o ...
... indicated that no slider turtles were present (Lewis 1946), suggesting the turtles likely colonized at some point after the golf course wetlands were created. Thus, although density at BHI is currently very high, further monitoring is needed to observe long-term changes to this population. Density o ...