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- You want to estimate the population size of pink salmon in the upper pitt river and use a mark-recapture technique to do so. You mark 1313 individuals as they pass under the port mann bridge. two weeks later you recapture 2245 individuals in pitt lake of which 204 have marks on them. What is your estimate of the population size?Change in Rabbit Population 1850-2000 100 90 80 70 60 50 40 30 20 10 white gray white gray 1850 2000 In 1850 there was a large snowshoe rabbit population in Manitoba, Canada. Over the years, the winter coloration (the color of the rabbit's fur) of the surviving rabbit population changed. The graph shows the change in winter coloration of rabbits between 185 to 2000. Based on the data, we could hypothesize that A) the winters are longer in length. B) the snowshoe rabbit has migrated to another area. the amount of snow cover varied over the years. D) more snowshoe rabbit predators have moved into Manitoba. % PopulationDuring a 24-month period of time, a population of 5 000 prairie dogs experienced 6 500 births and 5 560 deaths. Forty-two prairie dogs left the population and 85 prairie dogs joined the population. Show all work and explanation.a) The population change of prairie dogs is a. 6 585 b. 5 602 c. 983 d. 941 b)During the 24-month time period, the growth of the prairie dog population is a. 983 prairie dogs/year b. 492 prairie dogs/year c. 291.5 prairie dogs/year d. 41.0 prairie dogs/year c) Calculate the per capita growth rate of the prairie dog population AND the per capita growth rate per year of the prairie dog population. Show all work.
- Once an abundant species in Alberta, the caribou population is currently staggering at approximately 6,700 individuals. Little Smoky caribou herd is located in Northern Alberta, and its population is a risk of extirpation. In 1970, there were only 123 caribous in the Little Smoky area with a per capita growth rate of –0.258 between 1970 and 2012. What was the population of Little Smoky caribou herd in 2012? Express your answer rounded to the nearest whole number.7) The following data has been obtained from the coastal haddock (Melanogrammus aeglefinus) fishery of Maine. The fishing season was divided into 10 periods. Period Catch per Period 1 208 2 195 3 168 4 132 5 91 6 80 7 63 8 56 9 48 10 33 It was also recorded that five fishing trawlers were in operation during each period of the fishing season. Question: What was the size of the haddock population originally available to the fishery?This graph plots the difference between birth rates and death rates in Mexico during the 20th century. During which quarter century did Mexico experience the greatest rate of population growth? a) 1900–1925 50 b) 1925–1950 40 c) 1950–1975 Rate of 30 increase d) 1975–2000 20 Birth rate Death rate 10 1900 1925 1950 1975 2000 2025 2050 Year Adapted from Transitions in World Population, Population Bulletin 59: 1 (2004). © 2018 Pearson Education, Inc. Birth or death rate per 1,000 population
- The life table below is for a species of lizard. Use it to answer the questions below. It can be copied and pasted in excel or downloaded here. What is the intrinsic rate of increase of this population? nx bx 678 1 102 31 3 19 10 4 14 12 5 12 12 6 10 14 7 10 10 8 8 11 9 7 10 1.89 0.053 O 1.32 0.51Question 1) Answer yes or no to the following questions. Scenario (A) A researcher uses a model from a long term study of birth and death rates from the wild population to suggest that a population of 136 animals will go extinct within 100 years. Using 10,000 stimulations, he finds that the population went extinct in 9,547 of them. Select the true statements below. a) Is the minimum viable population size 136. b) is the model stochastic. c) Does the model include uncertainty in the population's trajectory. d) Does the population have at least a 95% chance of persisting for 100 years. e) Is it true that the only way to prevent extinction is to reduce adult mortality Scenario (B) It is argued that African giraffes should be listed under the US Endangered Species Act as they have a global population of just 70,000 individuals, and are threatened by poaching. Select the true statements below. a) Inbreeding is likely to be a serious problem for the current population of giraffes. b) Listing…There was another research effort underway to estimate the squirrel population on the PLU campus. The first trapping effort resulted in 15 individuals being captured, marked and released. The second capture effort resulted in 15 new squirrels being captured and 5 squirrels were recaptured. What is the estimated squirrel population? What are the primary assumptions of the population estimation procedure used in this question?
- S2) Below are two tables showing the population size and deaths by age for one year in the states of Louisiana (LA) and Florida (FL). Use the data to answer the following questions. You may use the blank cells in the tables for calculations and to show answers Age group 0-15 16-70 71+ Louisiana Deaths 30 215 585 Florida Age group Deaths 0-15 16-70 71+ 25 400 725 Population 165,000 300,000 75,000 Population 90,000 435,000 225,000 a. Calculate the overall crude mortality rates for LA and FL expressed as per 100,000 population. LA: FL: b. Calculate the age-adjusted mortality rates using the combined population as the standard. c. Explain what accounts for this difference in crude rates and adjusted rates between LA and FL.The northern hairy-nosed wombat has experienced historical population declines, though population have stabilized recently due to conservation efforts. While studying them researchers noticed the following fluctuations in (effective) population size: Year 1: 100 individuals Year 2: 90 individuals Year 3: 50 individuals Year 4: 75 individuals Year 5: 90 individuals Year 6: 95 individuals A. Given this information what is the long-term effective population size of this particular population over the six years? B. Assume that at the start of the study the researchers determined heterozygosity for this population to be 0.63 at microsatellite loci. What would you expect the heterozygosity to be at the end of the six years? (Answer part B)O Villay Use the passage to answer the question. Mule Deer A) In a short paragraph, propose a hypothesis to test the effect of a zoned reserve on mule deer populations. Justify your hypothesis based on your This image shows a male mule deer (Odocoileus hemionus), which is native to western North America. Named for their large ears, mule knowledge of zoned reserves. deer are hunted for sport and food under strict management B) In 1-2 short paragraphs, outline a field experiment to test your hypothesis on the effect of a zoned reserve on mule deer populations. Describe your control group, experimental group, and the data you would collect. Identify at least two environmental factors that could affect your data collection and practices, such as designated hunting seasons and limits on how many deer a hunter can take. Imagine a scenario where the local mule deer population has declined after a harsh winter. Wildlife management agencies have how you would address them, if possible. proposed…