You are an ecologist studying movement behavior of a bird population. You attach radio-transmitters to each member of several different populations of the bird, allowing you to measure precisely how many birds emigrate from each of the populations each year. You gather the following data: Bird population size Total number of birds emigrating per year 712 163 27 244 68 71 20 642 186 12 389 93 Does emigration represent a density-dependent process in this population? Explain your answer briefly.

Compare and contrast density dependent limiting factors and density independent limiting factors Density dependent both Density independent Limit population size

It is estimated that approximately 20,000 grizzly bears live in Western Canada, Yukon, and Northwest Territories. Currently, there are 198 grizzly bears remaining in Jasper National Park in an area of 9500 km2.    Calculate the density of the grizzly bear population in Jasper Park. Express your answer as a value rounded to two decimal places.  Answer grizzly bears/km2

For the next two items, refer to the table below of the population growth rates for Jamaica and Trinidad and Tobago in 2009.: The estimated population of Trinidad and Tobago for the year 2010 is? a. 1 363 900 b 390 000 c. 3 900 d. 1 303 900

On the mystical island of Lumina, researchers discover the elusive Glowfinch, a bird with radiant feathers that glow in the dark. During a mark-recapture study, 50 Glowfinches are marked with luminescent bands and released. In the second capture, 100 Glowfinches are caught, and 20 of them are found to still shimmer brightly. What is the estimated population size (N) of Glowfinches on Lumina? 0160 250 500 130 O100 200 13

What is the Shannon diversity index value for this community?     What is the Species evenness value for this community?

The maximum rate of increase of the seal population on the island occurred during which decade? a) 1910–1920 10 b) 1920–1930 c) 1930–1940 1915 1925 1935 1945 Year Data from K. W. Kenyon et al., A population study of the Alaska fur-seal herd, Federal Government Series: Special Scientific Report–Wildlife 12 (1954). © 2018 Pearson Education, Inc. Breeding male fur seals (thousands)

Vicuña 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 What type of factor is rainfall in regulating vicuña population growth? A. Density-independent; Bottom-up B. Density-independent; Top-down C. Density-dependent; Bottom-up D. Density-dependent; Top-down

A scientist constructs a graph to show the age structure of the human population of Country Y. The graph is shown here. Age Structure of the Human Population, Country Y I Male 100+ 95-99 90-94 85-89 80-84 75-79 70-74 65-69 60-64 55-59 50-54 45-49 40-44 35-39 30-34 25-29 20-24 15-19 10-14 5-9 0-4 Female 20% 10% 0% 10% 20% What conclusion is supported by the graph? 1 2 3 4 5 7 oby

A starting population of 300 individuals grows by 33% every year. Assuming that resources are unlimited, how big will the population be after 5 months (note: months not years)?   Question 4 options:   333   338   364   321     Previous PageNext Page