Due to recent habitat destruction and deforestation, multiple isolated populations of poison dart frogs were left behind in the Amazonian Forest. The table Population Population Size Initial allele frequency (p) 1 47 0.78 indicates the population size and initial allele frequencies for each population. 2 0.31 3 115 0.59 4 328 0.19 In terms of future conservation efforts, identify... • the population of most concern and • the population of least concern
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- 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.One concept of conservation biology is known as minimum viablepopulation. Some species’ populations are so fragmented andsmall that they may have very little genetic variability left. Withminimal genetic variation in the population, there is little likelihoodthat a population can adapt to an environmental threat, such as anew disease. Florida panthers are at or below the minimum viablepopulation level (estimated population less than 80). 1)Do you think that it is practical to use limited resources toconserve a population like the Florida panther? 2)Why?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?
- A population of wolves in a national park is known to be 150 individuals. As wildlife ecologist, you are tasked with assessing the accuracy of the mark and recapture technique. At the start, you mark 30 wolves, and your recapture yields 20 wolves, 5 of whom are marked. State whether the mark and recapture data results in an over or underestimation of the actual population size, and show work to support your claim.The per capita birth (b) and death (d) rates are measured for two populations across a range of population sizes in the attached figure. The equation for exponential growth rate is dN/dt=rN where the per capita growth rate is r=(b-d). The equation for logistic population growth rate is dN/dt=rN(1-N/K). With logistic growth, r varies as a function of the population size with density-dependent birth and/or death rates. See attached image If the death rate decreased, what would happen to the population trajectory for population A? a) increase faster b) increase slower c) decrease faster d) decrease slowerThe 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?
- Salt is notoriously dangerous to land snails; however, some populations of aquatic, freshwater snail have brackish (or a mix of salt and fresh water) water adaptations and live in different parts of a river system. A group of scientists monitored salt concentrations in the habitats of two freshwater snail populations located nearby and recorded the data as follows (in ppt, parts per thousand): Population 1 (Day 1): 0.1 ppt (morning), 0.0 ppt (afternoon), 0.1 ppt (evening) Population 2 (Day 1): 0.3 ppt (morning), 0.5 ppt (afternoon), 0.2 ppt (evening) In 3–5 sentences, 1) describe how these results show why the brackish water adaptation may be necessary, and 2) explain how to determine whether the inherited adaptation is influenced by environmental factors.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/km2Zebra mussels are an aquatic invasive species that are threatening the diversity and abundance of native species in the lake ecosystems of Alberta. Sylvan Lake is a beautiful recreational lake located in central Alberta. It has a total area of 43 km2. If the population of zebra mussels is estimated to be 128 mussels/200 km2, calculate the size of the zebra mussel population in Sylvan Lake. Express your answer as a value rounded to one decimal place. Answer
- A founder population of interesting creatures is established, and the average probability of identity by descent is calculated for each subsequent generation as follows: Generation F 1 0.05 2 0.0975 3 0.142625 4 0.2283625 a) What are the effective population sizes Ne for each Generation 1 through 4, relative to Generation 0 (the founder population)? b) What is the effective population size of Generation 4 relative to Generation 3? c) Is there any evidence for changes in population size after the founder event, and if so, at which generation did the size change in the number of breeding individuals occur?several years ago wolves were reintroduced in to a national park in North Carolina. Researchers have monitored the populations over the last several years and the per capita growth rate of the population is.5. If the current population size is 100, what equation would you use to determine how large he population will be in ten yearS? N/t *r N(1+r)^t (N*r)/t please highlight the answerVicuña are ungulate herbivores related to llamas that occupy high mountain grasslands in the Andes. They are valued for their wool. Overhunting led to global population declines from millions in the 1500s to thousands in the mid 1900s.Lauca National Park was established in Chile in 1970 and banned hunting of vicuña. Researchers used census data (solid circles) to fit the population dynamics, and evaluated two models: one in which the carrying capacity was fixed over time (“Logistic Constant K”, dashed line), and one in which the carrying capacity could vary over time (“Logistic Variable K”, solid line). See attached image The researchers found that rainfall ~4 years prior was a good predictor of the population size of vicuña in a given year. Is rainfall four years before 1990 likely to be lower than average or higher than average? Why?