Gear
Why should we not wear waders in the canoe?
If you were to tip the canoe, your waders will fill with water making it hard to swim
Where did our electrofishing labs take place?
Little garlic river
What species of fish did we use for our growth and tagging project?
splake
I sampled northern pike, bluegill, yellow perch and great white shark in my harlow lake assessment, what is my species richness?
4
What are the different structures you can use for aging fish? Name 3
Scale, otolith, operculum and vertebrate
This passive netting method took place near shore where we aimed at catching fish that were cruising the shoreline.
(mini) fyke net
What is the assumption of capture probabilities between passes using depleting methods?
Capture probabilities do not change
If we had 50 fish tagged with photonic dye and after 60 days 10 of the fish were still tagged, what is our tag retention?
20%
I caught 5 fish weighing 4.4, 6.2, 3.3, 4.3 and 6.7 grams. What is my average weight for captured individuals
4.98
What type of tags were used in the OCEARCH project? How do these differ from the tagging methods we used?
Acoustic telemetry tags and the difference is that you can essentially live-stream fish in real time.
Describe the differences between active and passive netting.
Whatever Michael says is right.
During our second day of electrofishing did we work with open or closed populations? Why is this important
Closed population, this is one of the assumptions of the depletion models.
What three tagging methods did we use for our growth and tagging labs?
photonic, fin clip and PIT tag
At the beginning of a 60 day period a splake weighed 6.2 grams, after 60 days the splake weighed 15.7 grams. What is the daily growth rate (grams per day).
.158 grams per day
What were the three different types of literature we looked at in Lab 1?
Peer reviewed, grey and popular science
This netting method involves individuals throwing the net and retrieving it.
Cast net
List two safety measures that our shocking backpack were equipped with
- beeping function when in use
-auto shut off when leaning
-fully sealed
-auto shut off when battery is submerged
List and explain the three different length measurements used in lab.
total length, fork length and standard length
Within a 50 meter stretch of stream I captured 33 individuals via backpack shocking. What is my CPUE.
.66 fish per meter.
Within a scale or otolith there are lines that we use as our growth indicators what are these darkened lines called?
Annuli
What is the type of passive net placed offshore in lakes and rivers that target different sizes of fish based on its mesh size?
Gill net
List two safety measures that individuals participating in electrofishing should always follow
-rubber gloves
-waterproof wader
-don't stick your hands in the water
-non conductive net handles
-general awareness
-not stepping on cathode
This internal structure is used for food processing. Researchers also use this to identify the difference between lake trout, brook trout and splake.
Pyloric caecae
I conducted a depletion study on a 50 meter section of stream and recovered the following data.
Pass 1 = 15 fish
Pass 2 = 7 fish
Pass 3 = 5 fish
What is 2+2?
4
What is the scientific name of the species Michael is doing his research on?
LOTA LOTA