What is the extinction rate of mammals, in MSY, since 2000 (+/-0.01)? Assume for our purposes that 5,436 mammals have been monitored over the past 20 years.

Pronghorns look very similar to antelopes and are considered the fastest mammal in North America. They can be found in the Southeastern parts of Alberta.     In the 1800s, it is thought that the population of pronghorns reach 35 million in the Prairies. By 1924, only 20,000 pronghorns could be found in Alberta. In 1996, only 9,600 remained.    What is the per capita growth rate of pronghorns in Alberta between 1924 and 1996?    Express your answer as a value between 0 and 1 rounded to two decimal places. If the population is decreasing indicate this with a negative sign.  Answer

True or False? a) In Lotka-Volterra competition models, coexistence CANNOT occur if interspecific competition is stronger than intraspecific competition. b)There are three types of survivorship curves that describe mortality rates at different age classes. A type I survivorship curve describes a population with low juvenile mortality, while a type III survivorship curve describes a population with high juvenile mortality.

Two species of leaf-eating lizards (species A and B) have coexisted on an isolated island for more than 10,000 years. In 1964, a third species of leaf-eating lizard (species C) was accidentally introduced by humans visiting the island. The graph below shows the population sizes of the three species since that time: Variation in Population Density of Lizards Population Density 45 40 44 35 30 25 20 Species A Species B Species C 10 5 0 1964 + 1974 1984 1994 2004 Year Describe the effect that the introduction of species C had on the population densities of species A and B. Explain what could have caused the introduction of species C to have an effect on the population densities of species A and B. (4 points)

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 these

A particular species of butterfly is capable of surviving and reproducing both in open grasslands and in forested habitats. However, in the forested habitats this butterfly  is heavily predated (eaten) by a forest bird species, so the beetle species avoids these areas and is generally found only in grasslands. Which of the following statements are true? Answer choices: A. The butterfly's realized niche includes both grasslands and forested habitats. B. The butterfly's fundamental niche includes only grasslands. C. The butterfly's realized niche includes only grasslands. D. The butterfly's fundamental niche includes both grasslands and forested habitats E. The butterfly and the forest bird species are in competition.

A population ecologist spent 4-years working on a bird species of concern that breeds in grasslands in Montana. Her goal was to evaluate the status of the population in small fragments of habitat. Most of the fragments were small (< 10 ha) but she had a large 250 ha fragment that was the core study site. She recorded an adult annual survival (SA) of 0.54 and an annual fecundity (F) of 5.28 young/yr (this includes both male and female offspring). The average juvenile survival rate (SJ; to their first year) was 0.22. What is the growth rate of this population? Group of answer choices 0.88 1.70 1.04 1.12

Tigers are solitary animals that require vast amounts of forest landscape as their territory to roam. In order to protect one tiger, we must conserve around 25,000 acres of forest. With poaching and deforestation threatening their survival, what are possible solutions to bring tiger populations back from the brink of extinction?