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Updated 5.0 Aquatic & Mosquito exam 2024 with correct answers
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Updated 5.0 Aquatic & Mosquito exam 2024 with correct answers List the roles plants play in a healthy aquatic ecosystem. Correct Answer -producing oxygen -preventing shoreline erosion -lessening excess nutrients during growing season -stabilizing lake bottom -providing food and habitat fo...

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  • September 12, 2024
  • 69
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • 50 aquatic mosquito
  • updated 50 aquatic mosquito exam 2024 with corr
  • list the roles plants play in a healthy aquatic e
  • describe the general growth habits of means of d
  • list the roles plants play in a

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Updated 5.0 Aquatic & Mosquito exam 2024
with correct answers
List the roles plants play in a healthy aquatic ecosystem. Correct 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

Describe the general growth habits of, means of dispersal and potential problems

caused by: Free-floating, filamentous, and "rooted" algae Correct 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

Correct 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. Correct 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 Correct 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. Correct 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? Correct Answer WI DNR Aquatic Plant Management Program



List the 2 main reasons why mosquito control may be warranted. Correct Answer -

nuisance

-disease



Describe the 4 stages of the mosquito life cycle, including the main structural features of

each Correct 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. Correct 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




List ways that excessive plant growth can adversely affect the ecology and uses of a

water body. Correct 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 Correct Answer -*growth habits*: rooted in shallow

water, most growth above water

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