WFC110 Lecture 25

1.

1 point

American Bison populations show evidence of

genetic introgression with domestic buffalo

genetic introgression with domestic cattle

interbreeding with Banteng, a bovid from South East Asia

genetic introgression with domestic yaks

2.

1 point

White nose syndrome (WNS) is named for a white fungus that appears
on the muzzle and other parts of bats. Choose the true statements below.

Detected in 6 of the 9 species of hibernating bats of the region

Does not harm hibernating bats.

Spread to bats that migrate to other places

The fungus causes bats to behave oddly, such as flying outside during the day and clustering near the entrances of caves and other hibernation areas

3.

1 point

Choose the example(s) of habitat degradation from class

River otters in the Columbia Basin may be impacted by chemicals that operate as endocrine disruptors; many male otters have a reduced or distorted baculae which influences reproductive capacity

Monk seal population decreases with the opening of coast guard post and increases when it closes

Freshwater dolphins in Asia and South America in danger from local fisheries and also water pollution and damming

Ships/boats disturb Orcas and other marine mammal communication

4.

1 point

Are anti-coagulate rodenticides (AR) found only in target species?

No, wider use of second generation generates more secondary poisoning.

Yes, only the second generation type is used widely preventing non-target species from being affected.

Yes, only the first generation type is used widely preventing non-target species from being affected.

No, wider use of first generation generates more secondary poisoning.

5.

1 point

Choose the false statement(s)

Pinnipeds have doubled since 1970s

Humpbacks have increased by 4 times as much since 1970s

Blue whales have doubled since 1970s

Blue whales have managed to avoid exploitation

6.

1 point

Choose the true statement(s)

Pronghorn slightly decreased

Temporal trends for antler ungulates have been mostly negative over the past century

Trophy mountain sheep have increased except big horn sheep

Muskox have substantially increased

Bison and mountain goats did not decline

7.

1 point

Rank by percistance in liver tissue from least to most days.

Warfarin, diphacinone, difethialone, brodifacoum, bromadiolone

Bromadiolone, brodifacoum, warfarin, diphacinone, difethialone

Bromadiolone, brodifacoum, difethialone, diphacinone, warfarin

Warfarin, diphacinone, difethialone, bromadiolone, brodifacoum

8.

1 point

Second generation anti-coagulate rodenticides (AR) are/classified by

Commensal and outdoor use

Single feeding

Multiple feeding

More persistent in tissue

Brodifacoum, bromadiolone, difethialone

Chlorophacinone, diphacinone, Warfarin

Less persistent in tissue

Commercial use only

9.

1 point

What are some of the issues with introducing beavers to Tierra del Fuego?

Lead to increased erosion

They removed deciduous trees, so it became replaced by grasslands

Not enough beavers were originally introduces, so the population was never able to establish

Accumulation of wood debris and changes in flow regimes altered biochemical composition of waters

10.

1 point

What is a major issue with the northern elephant seals near extinction and recovery?

They now consume too much space and decrease biodiversity.

They have already reached carrying capacity on their island and will soon become an invasive species nearby islands.

There is little to no genetic difference, so the entire population could be wiped out by disease.

There is no problem, because their near extinction recovery is a miracle.

11.

1 point

In the study of how otters affect minks what were the results

Otters are not present mink are active at night (nocturnal), when the otters return they shift to diurnal

Mink did not respond demographically to increases in otters

Mink did respond demographically to increases in otters

Otters are not present mink take over the space, when the otters are present they abandon the area

12.

1 point

If cats were believed to cause the decrease in sooty terns why didn't the removal of all cats cause a meaningful increase in recruitment?

Cats were not responsible for predation on sooty terns to begin with

Egg predation by black rats and especially mynas increased, compensating for cat predation

Other bird populations increased more rapidly and out competed sooty terns for space

Too many sooty terns were scared off the island and would not return

13.

1 point

First generation anti-coagulate rodenticides (AR) are/classified by

More persistent in tissue

Chlorophacinone, diphacinone, Warfarin

Single feeding

Commensal and outdoor use

Brodifacoum, bromadiolone, difethialone

Many feedings

Less persistent in tissue

Only for commercial use