Final Old Test Qs Flashcards
The most important aquaculture industry in the US in terms of both total dollar value and total production is:
a. Channel catfish
b. salmon
c. Rainbow trout
d. Crawfish shrimp
a. Channel catfish
The most important aquaculture industry in Floridian terms of total value of product sold is:
a. channel catfish b. salmon
c. crawfish
d. shrimp
e. ornamental fish
e. ornamental fish
Which of the following species is most likely to be raised in an ocean net pen?
a. channel catfish
b. tilapia
c. flounder
d. Salmon
e. shrimp
d. Salmon
As water temperature rises, the ability of water to hold oxygen in solution. ____
a. increases
b. Decreases
c. does not change
d. only increases if phytoplankton is present
b. Decreases
In a pond with heavy phytoplankton bloom and a significant accumulation of ammonia (TAN ~2mg/L), the greatest danger to fish is:
a. low O2 in the morning
b. oxygen supersaturation in the afternoon
c. pH spikes in the afternoon
d. pH troughs in the morning
e. there is no relationship between phytoplankton blooms and ammonia
c. pH spikes in the afternoon
When treating freshwater fish with copper sulfate, which one of the following water quality parameters is critical to determine the amount of the compound to apply?
a. dissolved oxygen
b. pH
c. total alkalinity
d. total hardness
e. temperature
c. total alkalinity
For optimum management, a maximum stocking density for a backyard recreational pond should be:
a. 3000 lb/acre
e. >5000 lb/acre
b. 500-2000 lb/acre
What is the major aquaculture industry in the US?
a. ornamental
b. crawfish
c. rainbow trout
d. Catfish
e. clams
d. Catfish
What is the most economically significant aquatic food species raised in Florida?
a. ornamental b. crawfish
c. rainbow trout d. catfish
e. Clams
a. ornamental
Which of the following aquaculture production systems is the most often use in the rainbow trout industry?
a. production ponds
b. cages
c. recirculating systems
d. raceways
e. ocean net pens
d. raceways
Dissolved oxygen concentrations of __mg/L result in severe hypoxia to exposed fish, but no mortality may be observed. Animals which survive may succumb to secondary bacterial infection.
a. 0.5 mg/L b. 1.0 mg/L c. 2.0 mg/L d. 5.0 mg/L e. 7.0 mg/L
c. 2.0 mg/L
Ammonia toxicity is decreased under conditions of:
a. high pH, high temperature
b. high pH, low temperature
c. low pH, low temperature
d. high pH, high temperature, high salinity
c. low pH, low temperature
Since “ban the nets” has been passed by Florida voters, what will be the major source of seafood sold in restaurants and fish markets around the state?
a. domestic aquaculture
b. foreign aquaculture
c. domestic fishing (outside Florida’s limit)
d. foreign fishing
a. domestic aquaculture
Which of the following is suggestive that fish may have died from an oxygen depletion?
a. red sores on the body
b. gaping mouth
c. primarily small fish affected
d. scum on the surface of the water
d. scum on the surface of the water
Which of the following fish pathogens has zoonotic potential?
a. Aeromonas hydrophila
b. Edwardsiella tarda
c. Mycobacterium marinum
d. all of the above
c. Mycobacterium marinum
