The 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?

In an effort to measure the size of a bluegill population in a pond, you set 10 traps for bluegills.  You catch and mark 40 with a tag on the tail fin and then release them.  A week later you return to the pond and set 10 traps and you catch 40 more, of which 8 have a tag on the tail fin.  What is the best estimate of the bluegill population in the pond?

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?

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 39 bass, 18 of which you had previously captured (marked ones). What is the estimated size of the population of small mouth bass in Dow's Lake? Round your answer to the closest whole value. You can round up or down if your answer is exactly between two values (i.e. 0.5).

In a study conducted on a population of kingfishers, the number of kingfishers at the beginning of the study was 500. The target of the study was to increase the population size of the kingfishers to 800 by the end of one year. Unfortunately, the target was not achieved. In that year, there were 100 live births, 50 deaths, 200 immigrations and 75 emigrations in the population. Scientists provided certain means by which the target could be achieved. Which of the following combinations of factors would lead to the achievement of the target. Births decreased by 50 and deaths increased by 100 b. Immigration increased by 75 and emigration increased by 20. c. Births increased by 50 and immigration increased by 75. d. Immigration increased by 75 and deaths decreased by 50. a.

Back at the original iguana population, only 40 iguanas remained. This population also has a growth rate of 0.6 and generation time of 2 years. But the island on which this population resides is much smaller and has a carrying capacity of 200. How many iguanas do you expect to find in the original population after 6 years?

You are trying to estimate the population size of a school of fish in the Florida Keys. The first time, you sample and mark 37 sardines. The second time around, you capture 40 sardines and 13 of them were already marked. What is the estimated population size? Show your work!

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.

Mark Recapture can be written as M N = R Define each term. Use this equation to answer the following question. Show your work. A biologist for Mosaic fertilizer company catches 26 Florida scrub jays as part of their monthly environmental monitoring. Each bird is given a band. The next month, they catch 32 birds. 13 of the birds have bands. What is the estimated population size of the birds in that area?

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. 22,320