Question

D Question 1 Which of the below is TRUE concerning demographic data and management of threatened species? Populations in which reproduction occurs in very young individuals are likely to be most vulnerable to population decline A population with an even mix of juveniles and adults is likely to grow or remain stable A population with mostly adults is likely to grow Populations in which very few mature individuals can be found are likely to be stable Question 2 A wide range of laws protect endangered species. Why don't species covered by such laws always quickly recover? It is common for species to be well into the extinction vortex before they are protected by law o International organizations, such as the United Nations have not yet acted to restrict international trade in endangered species In the United States, the applicable law, the Endangered Species Act, is too weak to afford meaningful protections to endangered species No species that is endangered is capable of rapid population growth Question 3 You are asked to monitor the population of an endangered marine fish over time. Which of the below methods would be the most appropriate? Population Viability analysis that was based on data from a nearby population of a different species Interviews of local fishermen that asked for their perception of the viability of the population of endangered fish A bi-annual survey that collected demographic data on the population A bi-annual census that collected demographic data on the population ustin

Answer 1

1. A population with an even mix of juveniles and adults is likely to grow and remain stable (a population with higher number of aged individuals will not be growing and stable)

2. It is common for species to be well into the extinction vortex before they are protected by law (if the population of endangered species has already become so low, then even significant conservation efforts cannot recover that in a small time)

3. A biannual census that collected demographic data on the population (this will give the absolute number of the endangered fish in the marine environment twice a year making monitoring conservation status easier)