Which observation would be considered more accurate and useful? Observation 1: There are fewer elk in the Yellowstone National Park that there used to be. Observation 2: The density of elk in Yellowstone National Park has declined during the consecutive dry years since the reintroduction of the native wolf population. No answer text provided. O Observation 2 O None of the above O Observation 1
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- You are contracted by the City of Ottawa to estimate the size of the population of small mouth bass in Dow's Lake. Using nets, you capture, mark, and release 48 bass. You return to Dow's Lake two weeks later and use the same techniques to sample more bass. This time, you capture 37 bass, 16 of which you had previously captured (marked ones). What is the estimated size of the population of small mouth bass in Dow's Lake?Which of the lab field techniques would you use to answer each of the following questions? Answer choices A-E. What is the density of dandelions in the lawn? Is the population of warblers in Scotland Run park in decline? A. Daubenmire plots B. BBS C. Mark/Recapture D. Point Centered Quarter E. Life Table AnalysisYou and your team continue to study the population of long-tongued pucas. You counted 1,000 individuals in this population at the start of the year. Over the course of a year, 150 pucas were born and 75 died. What is the per capita rate of increase (r) for this population?
- A fish biologist goes out and samples (sample 1) a population of salmon. A total of 109 (M) salmon were marked and released. At this time, a proportion of fish in the total population has a mark and we assume that this proportion remains constant. On a second sampling trip (sample 2), the biologist collected 177 (C) salmon and 57 (R) of those were marked from the initial sample. How large is the population?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?You have been tasked to estimate the number of pigeons along a lakeside in western Texas. To accomplish your assigned task, you capture 37 pigeons and mark them with PIT tags. You return to the site one week later and resample the population by capturing 52 pigeons. Of the 52, 30 are marked from your first sample. How many pigeons are in the population?
- A student decides to use the mark-recapture technique to estimate thepopulation size of mosquitofish in a small pond near his home. In thefirst catch, he marked 45 individuals. Two weeks later, he captured 62individuals, of which 8 were marked. What is the estimated size of thepopulation based on these data?a. 134 c b. 349 c. 558 d. 1,016 e. 22,320The neighborhood of a lake has a population of snails, which come out onto the sidewalk when the sprinklers come on, and the rest of the time they hide in the vegetation. If you catch 20, and mark them and, then, a week later, after they have had a chance to disperse into the population, you catch 15, and 6 have marks on them, what is the estimated size of the population?It is estimated that approximately 20,000 grizzly bears live in Western Canada, Yukon, and Northwest Territories. Currently, there are 146 grizzly bears remaining in Jasper National Park in an area of 7500 km2. Calculate the density of the grizzly bear population in Jasper Park. Express your answer as a value rounded to two decimal places. Units = grizzly bears/km2