NRES 250 final, NRES 250 Exam 2
WITH CLEAR WELL EXPLAINED
ANSWERS.
What are some of the important functions of a riparian zone on streams? - ANSWER
critical for:
link food webs
ag vs. forested
woody debris important for stream habitat
forest provides erosion control and thermal benefits
What are the effects of Clear-cutting
practices on the riparian zone are - ANSWER increased sediment loads, and stream
temperatures
*What are the effects of Selective harvest
practices on the riparian zone? - ANSWER develop better strategies (smaller cuts,
strategic placement)
What are some common stream degradation issues? - ANSWER -sedimentation
-habitat loss (both physical and thermal)
-increase BOD
-altered channel morphology
-flooding
-fish passage
-toxins
-fishing is poor
- they look terrible!
What is point-source vs. non-point source pollution? - ANSWER -Point-source: A
problem that can be directly (e.g, paper mill discharge)
-Non-point source: problem might be obvious, but not one single source can be
directly identified. (e.g, high atrazine levels)
*What are the most common sources of stream degradation in Wisconsin? -
ANSWER
Which is better: preservation or restoration?
Why? - ANSWER Preservation of "natural" conditions in the stream and watershed
is the best approach.
because a ounce of prevention is worth a pound of cure.
and restorations often not 100% successful in replicating natural conditions.
preservation takes priority over restoration.
,NRES 250 final, NRES 250 Exam 2
WITH CLEAR WELL EXPLAINED
ANSWERS.
Within a stream, where would you most likely find brook trout compared to brown
trout? - ANSWER -in-stream headwaters you are most likely to find brook trout
-in-stream lower sections you are likely to find brown trout
-in-stream middle section both are found.
-but headwater had more brook trout compared to brown trout.
stream order - ANSWER 1st order: small, cold, low species diversity
2nd order: moderate size, cool water, higher species diversity
3rd order: large, warm water, high species diversity
4th order: large rivers, warm water, turbid
Which species, brook or brown trout, is more tolerant of lower dissolved oxygen (DO)
levels and warmer temperatures? - ANSWER brown trout.
*How do we typically sample stream trout in Wisconsin?
What gear/s? - ANSWER -stocking
gear restrictions:
fly-fishing only, artificial only, single hook
premise- less harm to fish, higher survival
reality- often socially oriented
Stocking is a major tool for trout management in Wisconsin. Which performs better in
Wisconsin streams, feral or domestic trout? - ANSWER feral
allows for increased production
What are some common harvest regulations for trout in Wisconsin streams?
(Think about more than just numbers and sizes) - ANSWER -creel and length limits
-gear restrictions
-many stream-specific
-many specific to stream segments or reaches
-trophy regulations
What are some of the reasons we remove fish or wildlife from a population or area? -
ANSWER -overpopulation
-nuisance
-exotic species
-disease control
,NRES 250 final, NRES 250 Exam 2
WITH CLEAR WELL EXPLAINED
ANSWERS.
-increase growth/size structure
-undesirable effects on habitat
-reduce competition/predation with desirable species
-rescue operations
-experiments
What are some common techniques for conducting a fish and wildlife removals? -
ANSWER Fish
-partial removal: remove a portion of a population by removing fish from the pond
with a net.
-complete removal: remove the entire population by draining the pond.
-Piscicides: fish toxins
-Mechanical: nets, electrofishing, commercial fishing , partial removal.
-Anglers: liberalized regulations, reward tags.
Wildlife
-projectiles and traps: bounties, sharpshooters, urban archery hunts, trapping.
-Poison
-egg treatment
-Goose "round-ups"
What the different types of stockings?
When and why we do each type of stocking? - ANSWER -Introductory: think "new",
new spcies, new body of water, trap and transfer.
-Maintenance: think "help", limited or no natural reproduction.
-recovery efforts
-Supplemental: think "bonus", natural reproduction occurring, stock in response to
poor recruitment, public hunting areas or hunt clubs.
-Research: learn something, effects of new species invasion,
manipulation
Is supplemental stocking very successful at increasing populations (in general)? -
ANSWER rarely successful but people love it.
low survival
If you were managing an urban fishery would you use put and take or put, grow, and
take stocking methods?
Which of these is more expensive? - ANSWER -put and take: stock animals at
harvestable size, often wit hate hope they get harvested.
-Put, grow, and take: stock animals at subharvestable size, let them grow, the
harvest them. would use this for urban fishery.
, NRES 250 final, NRES 250 Exam 2
WITH CLEAR WELL EXPLAINED
ANSWERS.
How is stocking funded? - ANSWER -license dollars
-special permits or stamps
-private groups
What, where, when, who and how do regulate? (Fish Harvest Management and
Regulations notes) - ANSWER -What:
certain species are not harvested.
harvest of certain species regulated loosely or not at all.
-Who:
license or permits
open entry: squirrel hunting
limited entry: moose in northern mn
source of funds/info
-When:
Seasons
time of day type of day
traditions
-Where:
Refuges/sanctuaries
spawning areas
safety concerns
management zones
-How:
Gear/ techniques restrictions
"fair-chase" laws
creel limit - ANSWER the number that can be harvested in one day or one trip
bag limit - ANSWER the number that can be harvested in one day or one trip
possession limit - ANSWER the total number you can possess at any one time.
Why are creel/bag limits often an ineffective tool for managing fish? - ANSWER -
often not sufficient to reduce harvest
-relatively liberal for many species
-10% of anglers catch 90& of the fish
-most anglers keep no fish
WITH CLEAR WELL EXPLAINED
ANSWERS.
What are some of the important functions of a riparian zone on streams? - ANSWER
critical for:
link food webs
ag vs. forested
woody debris important for stream habitat
forest provides erosion control and thermal benefits
What are the effects of Clear-cutting
practices on the riparian zone are - ANSWER increased sediment loads, and stream
temperatures
*What are the effects of Selective harvest
practices on the riparian zone? - ANSWER develop better strategies (smaller cuts,
strategic placement)
What are some common stream degradation issues? - ANSWER -sedimentation
-habitat loss (both physical and thermal)
-increase BOD
-altered channel morphology
-flooding
-fish passage
-toxins
-fishing is poor
- they look terrible!
What is point-source vs. non-point source pollution? - ANSWER -Point-source: A
problem that can be directly (e.g, paper mill discharge)
-Non-point source: problem might be obvious, but not one single source can be
directly identified. (e.g, high atrazine levels)
*What are the most common sources of stream degradation in Wisconsin? -
ANSWER
Which is better: preservation or restoration?
Why? - ANSWER Preservation of "natural" conditions in the stream and watershed
is the best approach.
because a ounce of prevention is worth a pound of cure.
and restorations often not 100% successful in replicating natural conditions.
preservation takes priority over restoration.
,NRES 250 final, NRES 250 Exam 2
WITH CLEAR WELL EXPLAINED
ANSWERS.
Within a stream, where would you most likely find brook trout compared to brown
trout? - ANSWER -in-stream headwaters you are most likely to find brook trout
-in-stream lower sections you are likely to find brown trout
-in-stream middle section both are found.
-but headwater had more brook trout compared to brown trout.
stream order - ANSWER 1st order: small, cold, low species diversity
2nd order: moderate size, cool water, higher species diversity
3rd order: large, warm water, high species diversity
4th order: large rivers, warm water, turbid
Which species, brook or brown trout, is more tolerant of lower dissolved oxygen (DO)
levels and warmer temperatures? - ANSWER brown trout.
*How do we typically sample stream trout in Wisconsin?
What gear/s? - ANSWER -stocking
gear restrictions:
fly-fishing only, artificial only, single hook
premise- less harm to fish, higher survival
reality- often socially oriented
Stocking is a major tool for trout management in Wisconsin. Which performs better in
Wisconsin streams, feral or domestic trout? - ANSWER feral
allows for increased production
What are some common harvest regulations for trout in Wisconsin streams?
(Think about more than just numbers and sizes) - ANSWER -creel and length limits
-gear restrictions
-many stream-specific
-many specific to stream segments or reaches
-trophy regulations
What are some of the reasons we remove fish or wildlife from a population or area? -
ANSWER -overpopulation
-nuisance
-exotic species
-disease control
,NRES 250 final, NRES 250 Exam 2
WITH CLEAR WELL EXPLAINED
ANSWERS.
-increase growth/size structure
-undesirable effects on habitat
-reduce competition/predation with desirable species
-rescue operations
-experiments
What are some common techniques for conducting a fish and wildlife removals? -
ANSWER Fish
-partial removal: remove a portion of a population by removing fish from the pond
with a net.
-complete removal: remove the entire population by draining the pond.
-Piscicides: fish toxins
-Mechanical: nets, electrofishing, commercial fishing , partial removal.
-Anglers: liberalized regulations, reward tags.
Wildlife
-projectiles and traps: bounties, sharpshooters, urban archery hunts, trapping.
-Poison
-egg treatment
-Goose "round-ups"
What the different types of stockings?
When and why we do each type of stocking? - ANSWER -Introductory: think "new",
new spcies, new body of water, trap and transfer.
-Maintenance: think "help", limited or no natural reproduction.
-recovery efforts
-Supplemental: think "bonus", natural reproduction occurring, stock in response to
poor recruitment, public hunting areas or hunt clubs.
-Research: learn something, effects of new species invasion,
manipulation
Is supplemental stocking very successful at increasing populations (in general)? -
ANSWER rarely successful but people love it.
low survival
If you were managing an urban fishery would you use put and take or put, grow, and
take stocking methods?
Which of these is more expensive? - ANSWER -put and take: stock animals at
harvestable size, often wit hate hope they get harvested.
-Put, grow, and take: stock animals at subharvestable size, let them grow, the
harvest them. would use this for urban fishery.
, NRES 250 final, NRES 250 Exam 2
WITH CLEAR WELL EXPLAINED
ANSWERS.
How is stocking funded? - ANSWER -license dollars
-special permits or stamps
-private groups
What, where, when, who and how do regulate? (Fish Harvest Management and
Regulations notes) - ANSWER -What:
certain species are not harvested.
harvest of certain species regulated loosely or not at all.
-Who:
license or permits
open entry: squirrel hunting
limited entry: moose in northern mn
source of funds/info
-When:
Seasons
time of day type of day
traditions
-Where:
Refuges/sanctuaries
spawning areas
safety concerns
management zones
-How:
Gear/ techniques restrictions
"fair-chase" laws
creel limit - ANSWER the number that can be harvested in one day or one trip
bag limit - ANSWER the number that can be harvested in one day or one trip
possession limit - ANSWER the total number you can possess at any one time.
Why are creel/bag limits often an ineffective tool for managing fish? - ANSWER -
often not sufficient to reduce harvest
-relatively liberal for many species
-10% of anglers catch 90& of the fish
-most anglers keep no fish
