What is another name for a fishes tail fin
Caudal
What were many of the lakes in MN formed by?
Glaciers
Name at least 2 invasive species we have in MN
What is the scoring system we use for White-tail Deer
Boone and Crockett
What is the difference between fish and fishes
Fish refers to one fish or many fish of one type, fishes means many different species of fish in a group
What is another name for a fishes gill plate / gill cover
Operculum
Define Eutrophication
the aging of lakes characterized by increasing amounts of nutrients accumulating in the lake
Invasive species are what 2 things
Non-native (alien) to the ecosystem AND
Introduction causes or is likely to cause economic or environmental harm
What 2 things can you use to identify animals when you do not actually see them
tracks and scat
What is the name for a fishes back fin
Dorsal
What are 3 of the 4 types of fish surveying tools we discussed?
Electrofishing
Trap nets
Gill nets
Seining
What are the three types of lakes from youngest to olders
Oligotrophic, Mesotrohic, Eutrophic
True or false, The Ring-necked Pheasant is invasive
False
What is yarding up and why do deer do it
Deer group together in large numbers to
1. Conserve energy
2. Conserve heat
3. Safety in numbers
When do deer lose their velvet
August - September
What is one positive and one negative of using Trap nets for fish surveying
Positives:
Most fish do not die
Can target specific species
Simple to set up
Low environmental impact
Negatives:
Time consuming to place and retrieve
Other animals can get caught
Lots of maintenance fixing holes
What is 1 key characteristic of a mesotrophic lake
More nutrients than oligotrophic
Occasional algae bloom
Organic matter at the bottom
Excellent for fishing
What is 1 of the 2 problems that carp cause
Disrupt native plant roots
Declines water quality
What deer hunting zone number is Holdingford in
215
What is a riparian zone and what can they help with
Definition: an area of land between land and a river/lake
What can they help with? Reduce nutrient run off entering the lake
List the following fish stocking sizes in order from smallest to largest
- Fingerling
- Hatchling
- Fry
(smallest) Hatchling, Fry, Fingerling (biggest)
What are the three water layers of the lake
1. Epilimnion
2. Thermocline
3. Hypolimnion
What are 2 of the 3 problems that invasive plants
Form dense mats on the water's surface
Overtake habitat
Provides unsuitable habitat
what 4 types of measurements do you take to score a deer
main beam, tines, circumference, spread
What is 1 of the 3 ways biologists are trying to control algae blooms in lakes
Copper based algaecides, aerators, dip/sein nets