Water Quality
How could you correct low oxygen levels?
aeration, oxygenation
What happens to genetic diversity in aquaculture facilities?
Decreases
Approximately how many fish are in following tank?
Average Weight: 2.3 fish/gram
Tank Weight: 10,028 grams
4,360 fish
Where do most of Alaska's commerical salmon come from?
What is grown at UP Reef?
Coral
The NMU Aquatics lab uses city water for its facility. The pH is high and contains high levels of chlorine. How is the water dechlorinated?
Bubbled for 24hrs
Which chromosome has entirely heterozygous genes?
Gene 1 A1A1 B1B2
Gene 2 A2A1 B2B2
Gene 3 A2A2 B1B1
Gene 3
What is the equation for the mean intensity of parasites found on a fish?
A.) #infected/total fish sampled
B.) #total parasites/#infected individuals
C.) mean parasites/mean number of individuals
B.
A is how you determine prevalence of parasites found in fish not intensity. Intensity wants to know how "intense" or bad the infection is, not how many fish actaully have the disease which is the goal of prevalence.
Why are food costs so low for kelp farmers?
filter feeders
Is the lighing manual or automatic in the Aquatics Lab
Automatic: 12 on, 12 off
Of the fish in the NMU Aquatics lab, which would require a higher salinity level? Angelfish or the brook trout?
What are two ways to increase genetic diversity in broodstocks?
Kill everything, introduce new individuals, kill and add new
Cisco are fed 3% of their body weight daily. How much food would be fed per day, to a cisco tank that had a mass of 23,000g?
690 grams of food
White bass and striped bass
What agency regulates the NMU Aquatics Lab?
IACUC
Which is more toxic to fish- nitrate or nitrite?
nitrite
What ploidy are sterile fish?
Triploidy
What is the volume of the following rectangular tank? Must have correct units.
Length= 10 meters
Height =10 meters
Width= 5 meters
500 m3
How many employees work UP Reef?
Just Jeff and maybe his wife
Dissolved oxygen is effect by temperature, time of day, and tank density. Would DO levels be higher during the day or night? Why?
Day, photosynthesis
A hatchery manager decided to track the genetic diversity of their broodstock. Genetic testing was done over two years, heterozygosity was determined to go from 0.5 to 0.7. Did genetic diversity increase or decrease in the facility?
Increase
July- average weight: 2.24 g/fish
August- average weight: 2.59 g/fish
0.35g
Which fish is a descendant of the common carp, but is considered a cultural icon of Japan?
Koi
What living organism acts as a bio-filter in a couple tanks at the UP Reef facility? It helps with nitrate and phosphate uptake.