GGR208H5 Lecture : Migration.docx

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roserat376

2 Mar 2012

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Population growth/decline depends on 3 factors: number of births (cbr/tfr, number of deaths (cdr/le, migration. Natural increase only accounts for births and deaths (not for migration) (ni= br>dr) Population change accounts for all 3 factors. 1900-1911 increase in migration to account for population growth. 1950-1960 mass immigration- accounted more for population growth than ni. Canada depends on migration for population growth since our fertitiliy and birth rates are declining. Emigrant: person who moved from a place. Immigrant: person who moves to a place: visible minority: person who doesn"t share same physical characteristic with majority population (ethnicity) Visible minority status does not always imply immigrant status and vice versa: diaspora: a community outside of homeland i. e. chinese population in canada (china town) , little italy, xenophobia. Fear of muslims because of the terrorist connection. Form of racism that targets new comers communities. Mobility (any movement: any form of geographical movement (temporary/permanent, some populations have more mobility that others.

Related Questions

What is the most likely consequence of open pit mining on plant life?

a. a dramatic reduction in the variety of plant species

b. an increase in the number of plant species

c. the complete loss of plant life in the area occupied by the surface mine

d. a temporary decrease in plant populations

rubysnake808

The fish population P(t) in a lake is suddenly attacked by adisease that render the fish unable to reproduce. Assuming that thedeath rate of the fish is inversely proportional to the square rootof the fish population (i.e. k1 = Î²/â(P) where Î² is aconstant), perform the following tasks:

1. Write a differential equation that models the population offish as a function of time. Assume that the fish are infected bythe disease at t = 0 and define your constants.

2. Solve the differential equation with the initial condition thatP(0) = P0.

3. What is the half-life of the fish population?

4. If there were 900 fish initially, and 441 are left after 6weeks, how long does it take for all the fish to die? Assume thatthe disease was caused by radioactive waste dumped in the lake. Itis discovered that another population of fish, S(t), spontaneouslymutate into the original fish at a rate of k2 (per week) and neverdie. The population S(t) are born at a rate k3.

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harlequinsquirrel990

GGR208H5 Lecture : Migration.docx

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