(Extra Credit) Passenger Pigeons were hunted into extinction…

(Extra Credit) Passenger Pigeons were hunted into extinction. The last died in 1916. In addition to the direct mortality caused by humans in search of food, what characteristic of the remaining bird population facilitated a more rapid decline than from hunting mortality alone? 

A polygynous species has a population size of 1000 individua…

A polygynous species has a population size of 1000 individuals, a sex ratio of 40:60 M:F, and a longevity of 6 years. Assuming a fecundity of [b] and an annual mortality of 0%, how many individuals will be in the population after 1 year? Round your answer to the nearest whole animal.

Ecological Footprint:  A fraction of Earth has been dedicate…

Ecological Footprint:  A fraction of Earth has been dedicated to meeting human needs, and that fraction has risen as the human population has risen.  If everyone on earth lived at your standard of living, what proportion of the earth will be left for all the other species? (from the assignment to go calculate your ecological footprint from an external website)