RNR 2102 Final || with 100% Verified Solutions.
result from electrofishing can be considered as an estimate of fish density correct answers false
the pulse frequency of electrofishing can be selected to target a certain fish species or size correct
answers true
toxicants such as rotenone is appropriate in fast moving water because they can be spread
quickly correct answers false
rotenone kills fish that cannot be consumed later because of poisonous residue correct answers
true
prima cord is the brand name of a toxicant for killing fish correct answers false
identify the following as active or passive nets
a. seines
b. gill nets
c. hoops nets
d. trawls
e. fyke nets correct answers a.active
b. passive
c.passive
d. active
e.passive
which of the following items is not measured by a hydrolab? correct answers b substrate physical
properties
secchie disk is used to measure water correct answers turbidity
what is the Edman dredge used for? correct answers used to sample bottom sentiments and fauna
of rivers
fish can be measured by
a. weight
b. length
c. age
d. all of the above correct answers d all of the above
what is the biggest problem in sampling animal populations? correct answers they're always
moving and they are never stationary
which of the following assumptions is not true in the mark-recapture method?
a. population is closed (no birth, death, emigration, nor immigration)
b. all animals have the same probability of being caught
, c. marking affects the chance of catching the animal at time 2
d. animals do not lose their marks correct answers c. because markings DO NOT
which of the following assumptions is not true in the line transect method?
a. lines are randomly placed in the tract
b. animals are not counted twice
c. animals have he same change of being seen (neither sex nor age bias)
d. animals live in groups correct answers d. animals live in groups
which of the following assumptions is not true in the change in ratio method?
a. population is closed (no birth, emigration, nor immigration)
b. the change in ratio (p1 chasing into p2) should be small
c. all animals have the same probability of being caught/seen
d. removals are known exactly correct answers b. the change in ratio should be small
why are plots in biomass sampling square rather than circular? correct answers it is easier to
construct
why are plots used in overstay sampling circular rather than square or rectangle? correct answers
use circular plots in the woods because sharp corners are difficult to find and turn in the woods
why is dry weight often deemed more desirable than green weight? correct answers so that the
weight is not over estimated from the water content
can a vegetation board give you an estimate of density of understory vegetation? correct answers
no, measures index
give examples of wildlife indices correct answers track count
deer carcasses
age ratio
sex ratio
electro fishing
catch effort
give an example of an index that needs to be standardized correct answers bird call counts
why do we need inventory forest stands? correct answers 1. financial
2. management planning
3. policy making
4. research
what is the main difference between sampling forest stands and sampling wildlife or fisheries
population? correct answers trees are located at same place at all times when wildlife and
fisheries are constantly moving
result from electrofishing can be considered as an estimate of fish density correct answers false
the pulse frequency of electrofishing can be selected to target a certain fish species or size correct
answers true
toxicants such as rotenone is appropriate in fast moving water because they can be spread
quickly correct answers false
rotenone kills fish that cannot be consumed later because of poisonous residue correct answers
true
prima cord is the brand name of a toxicant for killing fish correct answers false
identify the following as active or passive nets
a. seines
b. gill nets
c. hoops nets
d. trawls
e. fyke nets correct answers a.active
b. passive
c.passive
d. active
e.passive
which of the following items is not measured by a hydrolab? correct answers b substrate physical
properties
secchie disk is used to measure water correct answers turbidity
what is the Edman dredge used for? correct answers used to sample bottom sentiments and fauna
of rivers
fish can be measured by
a. weight
b. length
c. age
d. all of the above correct answers d all of the above
what is the biggest problem in sampling animal populations? correct answers they're always
moving and they are never stationary
which of the following assumptions is not true in the mark-recapture method?
a. population is closed (no birth, death, emigration, nor immigration)
b. all animals have the same probability of being caught
, c. marking affects the chance of catching the animal at time 2
d. animals do not lose their marks correct answers c. because markings DO NOT
which of the following assumptions is not true in the line transect method?
a. lines are randomly placed in the tract
b. animals are not counted twice
c. animals have he same change of being seen (neither sex nor age bias)
d. animals live in groups correct answers d. animals live in groups
which of the following assumptions is not true in the change in ratio method?
a. population is closed (no birth, emigration, nor immigration)
b. the change in ratio (p1 chasing into p2) should be small
c. all animals have the same probability of being caught/seen
d. removals are known exactly correct answers b. the change in ratio should be small
why are plots in biomass sampling square rather than circular? correct answers it is easier to
construct
why are plots used in overstay sampling circular rather than square or rectangle? correct answers
use circular plots in the woods because sharp corners are difficult to find and turn in the woods
why is dry weight often deemed more desirable than green weight? correct answers so that the
weight is not over estimated from the water content
can a vegetation board give you an estimate of density of understory vegetation? correct answers
no, measures index
give examples of wildlife indices correct answers track count
deer carcasses
age ratio
sex ratio
electro fishing
catch effort
give an example of an index that needs to be standardized correct answers bird call counts
why do we need inventory forest stands? correct answers 1. financial
2. management planning
3. policy making
4. research
what is the main difference between sampling forest stands and sampling wildlife or fisheries
population? correct answers trees are located at same place at all times when wildlife and
fisheries are constantly moving
