5.0 Aquatic & Mosquito Exam (Latest Updated
2026 Questions And Answers) Guaranteed Pass
100%
QUESTIONS AND ANSWERS
List the roles plants play in a healthy aquatic ecosystem.. ANSWER -
producing oxygen
-preventing shoreline erosion
-lessening excess nutrients during growing season
-stabilizing lake bottom
-providing food and habitat for fish, waterfowl, and other aquatic animals
List ways that excessive plant growth can adversely affect the ecology and
uses of a water body.. ANSWER -harm ecology of aquatic ecosystem
-curtail or prevent recreational water uses (e.g. fishing, boating, swimming)
-impart tastes or odors to drinking water
-hamper water treatment operations
-adversely affect aesthetics, resort trade, and waterfront property values
-produce toxins that harm animals drinking the water
Describe the general growth habits of, means of dispersal and potential
problems caused by: Emergent aquatic plants. ANSWER -*growth habits*:
rooted in shallow water, most growth above water
-*means of dispersal*: underground root systems
-*potential problems*: very dense and may exclude recreational pursuits like
boating, fishing, and swimming. Purple loosestrife is an example of a problem
species.
Describe the general growth habits of, means of dispersal and potential
problems caused by: Submergent aquatic plants (both pondweeds and plants
with whorled leaves). ANSWER -*growth habits*: grow mostly under water
surface, pondweeds sometimes have floating leaves in addition to their
submerged leaves; whorled-leaf plants grow underwater with whorled leaf
attachments
,-*means of dispersal*: pondweeds have extensive root systems, runners, and
can also reproduce from seeds; plants with whorled leaves can disperse when
uprooted by breaking free and getting moved by the wind
-*potential problems*: most pondweeds not nuisance except for curlyleaf
pondweed and sometimes sago pondweed; whorled leaf plants can uproot and
break free easily and drift with wind to clutter shoreline; Eurasian
watermilfoil is an aggressive non-native that can affect habitat and restrict
recreation. Raking is required to remove these clutters.
Describe the general growth habits of, means of dispersal and potential
problems caused by: Free-floating and rooted floating-leaved aquatic plants.
ANSWER -*growth habits*: occur on water surface and can be free-floating
or rooted with large floating leaves
-*means of dispersal*: free floating plants are easily windblown. rooted ones
not so much
-*potential problems*: free-floating plants accumulate on shorelines and are
difficult to control in large waterbodies; rooted plants are rarely a nuisance.
Describe the general growth habits of, means of dispersal and potential
problems caused by: Free-floating, filamentous, and "rooted" algae. ANSWER
-*growth habits*: found free-floating (planktonic) or attached to submerged
surfaces (filamentous or "rooted").
-*means of dispersal*: multiply rapidly in warm weather;
-*potential problems*: free-floating algae responsible for many nuisance algal
blooms (release toxin, low DO, blue-green algae); removing rooted algae can
allow worse species to come in so don't mess with them.
List the advantages and disadvantages of chemical control of aquatic plants
and algae. ANSWER *Advantages*:
-offer longer-lasting control than some mechanical methods
-less physical labor
-ultimately cost less
-important tool for specific nuisance plants/algae such as Eurasian
watermilfoil and purple loosestrife
*Disadvantages*:
-restrictions on water use
-oxygen depletion and fish kills
-sudden nutrient release into water can lead to other plant or algae problems
-risk to people and nontarget organisms
,Describe the beneficial roles of Wisconsin's fish populations.. ANSWER -
maintain balanced communities by feeding on aquatic plants, insects, and
other fish & provide a food source for natural predators
-fishing for food/sport is popular in WI and ddepends on healthy populations
-fish farms and hatcheries raise fish for food, feed, fertilizer, bait, and to
release
List 5 types of situations in which fish control may be warranted. ANSWER -
eliminating undesirable or competing fish from fish rearing ponds
-removing exotic and other undesirable species from a waterbody
-thinning stunted fish to bring a population into balance
-eliminating fish from a hatchery water supply to prevent a potential reservoir
of disease-causing organisms
-treating fish spawning sites to prevent overpopulation of an individual
species
Explain why post-treatment management can be important in the long-term
success of a pesticide treatment project.. ANSWER -because when fish
populations are lowered, density-dependent population growth allows the
population to rebound if not managed post-treatment
Know the Law: Who do you need to get approval from to conduct any
chemical treatment for fish control?. ANSWER WI DNR Aquatic Plant
Management Program
List the 2 main reasons why mosquito control may be warranted.. ANSWER -
nuisance
-disease
Describe the 4 stages of the mosquito life cycle, including the main structural
features of each. ANSWER -*egg*: laid in water, hatch in ~3 days, some laid
on dry land and hatch when flooded
-*larva*: "wiggler", 4 instars with molting in between each, filterers, air tube
to breath from surface
-*pupa*: comma shaped, non-feeding, lasts a few days, contain respiratory
trumpets, "tumblers"
-*adult*: 1 pair wings, elongated probiscis, pair of antennae, males have bushy
antennae while females have short and sparse antennae
, List the types of info you need about a mosquito species before you can
develop an effective program to control it.. ANSWER -the types and locations
of breeding sites
-# of generations per year
-host preference of the females (what animals they prefer to get blood from)
-seasonal population levels and how rainfall affects them
-their flight range
-common resting areas
-whether the species can transmit pathogens that may be present in your area
-whether the mosquitoes carry pathogens that are present in wildlife
populations
Describe the habits of Aedes triseriatus, Aedes vexans, and Culex pipiens
species of mosquitoes.. ANSWER -*Aedes triseriatus*: tree-hole mosquito;
breeds in old tires, tin cans, barrels, tree holes and stumps; several
generations per year; main vector of La Crosse encephalitis
-*Aedes vexans*: most common pest species in state from late spring-late fall;
"inland floodwater mosquito"; larvae in roadside puddles, woodland pools,
temporary pools, and river bottoms; continuous breeding in wet years;
survives winter and dry periods in egg stage; adults migrate 15-20 miles or
more from breeding sites and can live for 3-4 weeks; eggs dormant for up to 5
years before flooding prompts hatching
-*Culex pipiens*: breed in temporary or permanent pools that are high in OM
like ditches or sewage lagoons; females lay eggs in rafts and eggs hatch
quickly; responsible for St. Louis encephalitis and West Nile Virus.
-Both Aedes triseriatus and Culex pipiens breed in "backyard sites" like bird
baths, ponds, tree holes, buckets, tires, and rain barrels.
List the 3 main mosquito-transmitted diseases that occur in WI and know the
mosquito vector for each.. ANSWER -*La Crosse Encephalitis*: Aedes
triseriatus
-*West Nile Virus*: Culex pipiens
-*Dog Heartworm*: Aedes vexans
Define the word pesticide and explain how the word differs from specific types
of pesticides.. ANSWER -*Pesticide*: any substance used to directly control
pest populations or to prevent or reduce pest damage
2026 Questions And Answers) Guaranteed Pass
100%
QUESTIONS AND ANSWERS
List the roles plants play in a healthy aquatic ecosystem.. ANSWER -
producing oxygen
-preventing shoreline erosion
-lessening excess nutrients during growing season
-stabilizing lake bottom
-providing food and habitat for fish, waterfowl, and other aquatic animals
List ways that excessive plant growth can adversely affect the ecology and
uses of a water body.. ANSWER -harm ecology of aquatic ecosystem
-curtail or prevent recreational water uses (e.g. fishing, boating, swimming)
-impart tastes or odors to drinking water
-hamper water treatment operations
-adversely affect aesthetics, resort trade, and waterfront property values
-produce toxins that harm animals drinking the water
Describe the general growth habits of, means of dispersal and potential
problems caused by: Emergent aquatic plants. ANSWER -*growth habits*:
rooted in shallow water, most growth above water
-*means of dispersal*: underground root systems
-*potential problems*: very dense and may exclude recreational pursuits like
boating, fishing, and swimming. Purple loosestrife is an example of a problem
species.
Describe the general growth habits of, means of dispersal and potential
problems caused by: Submergent aquatic plants (both pondweeds and plants
with whorled leaves). ANSWER -*growth habits*: grow mostly under water
surface, pondweeds sometimes have floating leaves in addition to their
submerged leaves; whorled-leaf plants grow underwater with whorled leaf
attachments
,-*means of dispersal*: pondweeds have extensive root systems, runners, and
can also reproduce from seeds; plants with whorled leaves can disperse when
uprooted by breaking free and getting moved by the wind
-*potential problems*: most pondweeds not nuisance except for curlyleaf
pondweed and sometimes sago pondweed; whorled leaf plants can uproot and
break free easily and drift with wind to clutter shoreline; Eurasian
watermilfoil is an aggressive non-native that can affect habitat and restrict
recreation. Raking is required to remove these clutters.
Describe the general growth habits of, means of dispersal and potential
problems caused by: Free-floating and rooted floating-leaved aquatic plants.
ANSWER -*growth habits*: occur on water surface and can be free-floating
or rooted with large floating leaves
-*means of dispersal*: free floating plants are easily windblown. rooted ones
not so much
-*potential problems*: free-floating plants accumulate on shorelines and are
difficult to control in large waterbodies; rooted plants are rarely a nuisance.
Describe the general growth habits of, means of dispersal and potential
problems caused by: Free-floating, filamentous, and "rooted" algae. ANSWER
-*growth habits*: found free-floating (planktonic) or attached to submerged
surfaces (filamentous or "rooted").
-*means of dispersal*: multiply rapidly in warm weather;
-*potential problems*: free-floating algae responsible for many nuisance algal
blooms (release toxin, low DO, blue-green algae); removing rooted algae can
allow worse species to come in so don't mess with them.
List the advantages and disadvantages of chemical control of aquatic plants
and algae. ANSWER *Advantages*:
-offer longer-lasting control than some mechanical methods
-less physical labor
-ultimately cost less
-important tool for specific nuisance plants/algae such as Eurasian
watermilfoil and purple loosestrife
*Disadvantages*:
-restrictions on water use
-oxygen depletion and fish kills
-sudden nutrient release into water can lead to other plant or algae problems
-risk to people and nontarget organisms
,Describe the beneficial roles of Wisconsin's fish populations.. ANSWER -
maintain balanced communities by feeding on aquatic plants, insects, and
other fish & provide a food source for natural predators
-fishing for food/sport is popular in WI and ddepends on healthy populations
-fish farms and hatcheries raise fish for food, feed, fertilizer, bait, and to
release
List 5 types of situations in which fish control may be warranted. ANSWER -
eliminating undesirable or competing fish from fish rearing ponds
-removing exotic and other undesirable species from a waterbody
-thinning stunted fish to bring a population into balance
-eliminating fish from a hatchery water supply to prevent a potential reservoir
of disease-causing organisms
-treating fish spawning sites to prevent overpopulation of an individual
species
Explain why post-treatment management can be important in the long-term
success of a pesticide treatment project.. ANSWER -because when fish
populations are lowered, density-dependent population growth allows the
population to rebound if not managed post-treatment
Know the Law: Who do you need to get approval from to conduct any
chemical treatment for fish control?. ANSWER WI DNR Aquatic Plant
Management Program
List the 2 main reasons why mosquito control may be warranted.. ANSWER -
nuisance
-disease
Describe the 4 stages of the mosquito life cycle, including the main structural
features of each. ANSWER -*egg*: laid in water, hatch in ~3 days, some laid
on dry land and hatch when flooded
-*larva*: "wiggler", 4 instars with molting in between each, filterers, air tube
to breath from surface
-*pupa*: comma shaped, non-feeding, lasts a few days, contain respiratory
trumpets, "tumblers"
-*adult*: 1 pair wings, elongated probiscis, pair of antennae, males have bushy
antennae while females have short and sparse antennae
, List the types of info you need about a mosquito species before you can
develop an effective program to control it.. ANSWER -the types and locations
of breeding sites
-# of generations per year
-host preference of the females (what animals they prefer to get blood from)
-seasonal population levels and how rainfall affects them
-their flight range
-common resting areas
-whether the species can transmit pathogens that may be present in your area
-whether the mosquitoes carry pathogens that are present in wildlife
populations
Describe the habits of Aedes triseriatus, Aedes vexans, and Culex pipiens
species of mosquitoes.. ANSWER -*Aedes triseriatus*: tree-hole mosquito;
breeds in old tires, tin cans, barrels, tree holes and stumps; several
generations per year; main vector of La Crosse encephalitis
-*Aedes vexans*: most common pest species in state from late spring-late fall;
"inland floodwater mosquito"; larvae in roadside puddles, woodland pools,
temporary pools, and river bottoms; continuous breeding in wet years;
survives winter and dry periods in egg stage; adults migrate 15-20 miles or
more from breeding sites and can live for 3-4 weeks; eggs dormant for up to 5
years before flooding prompts hatching
-*Culex pipiens*: breed in temporary or permanent pools that are high in OM
like ditches or sewage lagoons; females lay eggs in rafts and eggs hatch
quickly; responsible for St. Louis encephalitis and West Nile Virus.
-Both Aedes triseriatus and Culex pipiens breed in "backyard sites" like bird
baths, ponds, tree holes, buckets, tires, and rain barrels.
List the 3 main mosquito-transmitted diseases that occur in WI and know the
mosquito vector for each.. ANSWER -*La Crosse Encephalitis*: Aedes
triseriatus
-*West Nile Virus*: Culex pipiens
-*Dog Heartworm*: Aedes vexans
Define the word pesticide and explain how the word differs from specific types
of pesticides.. ANSWER -*Pesticide*: any substance used to directly control
pest populations or to prevent or reduce pest damage
