Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

NRES 250 > EXAM 3 FISHERIES > Flashcards

EXAM 3 FISHERIES Flashcards

1
Q

What are the different uses of marked animals

A

movement and migration
habitat use
behavior patterns
stocking success
abundance and mortality

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the assumptions of using the mark-recapture method on closed populations

A

population is closed- no immigration/emigration, no recruitment/mortality
tagging does not affect matchability
animals do not lose their tags in-between sampling periods
all tags are identified and reported

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the ecological roles of wetlands

A

water storage to mitigate flooding and erosion
reduce dement and nutrients to improve water quality
sequester atmospheric carbon
groundwater recharge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is an ephemeral wet land

A

a wet land that is only wet in the spring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what are the effects of different forestry practices on the riparian zone

A

forests provide erosion control and thermal benefits
woody debris. is important to stream habitat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are some common stream degradation issues

A

sedimentation
habitat loss
altered channel morphology
flooding
toxins
poor fishing practices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is point source vs non-point source pollution

A

point source:
a problem that can be directly attributed to a specific location
non-point source:
problem may be obvious, but not only one single source can be identified

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the most common sources of stream degradation in WI

A

agricultural
vegetation removal
construction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

preservation vs restoration

A

preservation:
involved keeping an object from destruction and seeing to it that the object is irredeemably altered or changed
restoration:
recreated, initiate or accelerate the recovery of an ecosystem that has been destroyed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

which is better preservation or restoration

A

preservation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what are some of the types of in-stream habitat modifications that we can do?

A

easement
creation of public fishery areas
prioritize watersheds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which species, brook or brown trout, is more tolerant of lower dissolved oxygen levels and warmer temperatures

A

brown trout

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how are trout typically distributed within a stream

A

first order: small, cold water, low species diversity
second order: moderate size, cool water, higher species diversity
third order: larger size, warmer water, high species diversity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What gears do we use to sample stream trout

A

electrofishing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which preforms better in WI streams, wild or domestic trout

A

survival is 2-4 times greater for wild trout

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are some common harvest regulations for stream trout in WI

A

creel and length limits
gear restrictions
trophy regulations

17
Q

what are some of the reasons we remove fish or wildlife from a population or area

A

over population
nuisance
exotic species
disease control
increase growth/size structure
undesirable effects on habitat
reduce competition/predation with desirable species
rescue operations
experiments

18
Q

What are come common techniques for conduction fish and wildlife removals

A

piscicides (fish toxins)
mechanical- nets, electrofishing
anglers
projectiles and traps

19
Q

What the different types of stockings

A

maintenance- recovery effort
supplemental- stock in response to poor recruitment

20
Q

what is the put and take method

A

stock animals at a harvestable size, often with the hope they get harvested

21
Q

what is the put, grow and take method

A

stock animals at sub-harvestable size, let them grow, and then harvest them

22
Q

how is stocking funded

A

license dollars
special permits or stamps
private groups

23
Q

what do we regulate

A

endangered or threatened species
migratory species

24
Q

who do we regulate

A

anglers and hunters
using license or permits, open or limited entry

25
Q

when do we regulate

A

seasons:
spawning/ birthing/ rearing

26
Q

where do we regulate

A

refugees and sanctuaries
spawning areas
migratory hotspots
safety concerns
management zones

27
Q

how do we regulate

A

gear/ technique restrictions
fair chase laws
safety concerns

28
Q

what is a creel/bag and possession limit

A

creel/bag limit:
the number that can be harvested in one day or one trip
possession limit:
the total number you can possess at any one time, including what is in your freezer

29
Q

why are creel/bag limits often ineffective tool for managing fish

A

often not sufficient enough to reduce harvest
most anglers do not keep fish
few people keep a legal limit

30
Q

how are the quotes divided up in relation to walleye management in the Ceded Territories

A

tribe declares a percentage of safe harvest
anglers can harvest remaining quota

31
Q

what is the total annual exploitation rate set at?

A

35%

32
Q

how are length and slot limits used to help reduce the risk of over exploitation

A

anglers are able to harvest larger fish to keep resources plentiful for younger, smaller fish

33
Q

open entry system vs limited entry system

A

open entry:
the condition where access to the fishery, for the purpose of harvesting fish is unrestricted
limited entry:
licensing is limited

34
Q

Why did the walleye regulations on Lake Oahe not protect larger walleye

A

The walleye regulations protected smaller fish so they could grow and reproduce easier. By creating length limits, the larger fish, who are more likely to die sooner due to natural causes, will be harvested leaving resources available to growing fish.

35
Q

what are some of the caused of the lake whitefish collapse in Lake Michigan

A

logging:
increased sediment and water temps
sea lamprey:
killed fish at a high rate
zebra mussels:
changed the food web, so walleye had to look towards other sources of energy. There was not enough food for all the walleye

36
Q

What are some of the causes of the recovery of lake whitefish in Lake Michigan

A

clean water act:
limited pollution in waters
Great Lake fisheries commission:
conducted research to remove sea lamprey

37
Q

are there different genetic stocks of lake whitefish in lake Michigan

A

yes, there are 6 different stocks

38
Q

what are some of the challenges of managing lake whitefish in lake michigan?

A

lake whitefish are a migratory species, so it is hard to regulate

NRES 250 (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions