AQUACULTURE TEST BANK WITH QUESTIONS AND ANSWERS
The _____ of a fish removes oxygen from the water and forces it through its gills - ANS
- Respiratory System
_______ conveys sensation impulses to a fish's brain. - ANS - Nervous System
________ breaks down the food a fish consumes. - ANS - Digestive System
The ________ consists of intestines and kidneys and it filters waste from the blood. -
ANS - Excretory System
The _______ is a lateral line for balance. - ANS - Sensory System
The _______ consists of testes, ovaries, produces sperm and egg for the next
generation. - ANS - Reproductive System
The _____ consists of a heart, veins, and arteries. - ANS - Circulatory System
What is the name of the flap that covers the gills? - ANS - operculum
Which of the following organs is not part of a fish's digestive tract? - ANS - gills
Fish are used for: - ANS - all the listed answers
What is the purpose of the lateral line in fish? - ANS - sense pressures and vibrations
How does a fish pump water over its gills? - ANS - all the listed answers
In internal fertilization with fish: - ANS - the male deposits sperm inside the female
External fertilization with mouth brooders is: - ANS - the males deposits sperm over the
eggs after the female lays them
Which class of fish has a bony skeleton? - ANS - Osteichthyes
Which class of fish has a cartilage skeleton? - ANS - Chondrichthyes/Cartilaginous
Which class of fish has no real mouth? - ANS - Agnatha/jawless
What do the vertebrae protect? - ANS - the spinal cord
What do the intestines do? - ANS - help absorb nutrients into the bloodstream
Which of the following in classified in the class Chondrichthyes? - ANS - sharks
The layer of mucus/slime that covers the scales of fishes - ANS - provides insulation
and allows it to slide through the water and away from predators more easily and
waterproofs the fish
Most fishes produce too many offspring to be supported by their environment. Why
does this help to ensure survival of the species? - ANS - only the strongest, best-
adapted fishes survive
Lampreys and hagfishes are the only remaining: - ANS - jawless fish
All fish have a(n) ________ of either bone or cartilage. - ANS - skeleton
A bony fish will rise in the water when the - ANS - swim bladder fills with gas (oxygen)
An adaptive advantage of a bony skeleton over a cartilage skeleton is: - ANS - bony
skeletons are lighter weight
Which is not a characteristic of most fishes? - ANS - single - loop circulation
In most fishes, blood circulates from the heart to the - ANS - rest of the body, the gills,
then back to the heart
A bony fish uses its operculum to - ANS - draw water over it's gills
The yellow perch is an example of a - ANS - bony fish
The dogfish is an example of a - ANS - cartilaginous fish
The skate (ray) is an example of a - ANS - cartilaginous fish
The ratfish is an example of a - ANS - bony fish
Using the analogy: Gills is to Filaments as Heart is to Chambers means... - ANS -
filaments are part of gills, like chambers is part of a heart
A yellow perch (or any bony fish) propels itself forward with its - ANS - caudal fins
,AQUACULTURE TEST BANK WITH QUESTIONS AND ANSWERS
There is a future in aquaculture because: - ANS - the demand for fish is increasing
The density or crowding of an aquacrop being produced is: - ANS - production intensity
Fish who prefer warm temperatures would like to live in an environment from - ANS -
65-85 F
Fish who prefer cold temperatures would like to live in an environment from - ANS - 32-
65 F
The amount of food a fish will eat depends on: - ANS - all of the listed answers
The two most common solid wastes in a recirculating fish tank are: - ANS - uneaten
food & feces
The keeping of fish, plants, and other species for aesthetic or personal appeal: - ANS -
ornamental aquaculture
Ammonia comes from: - ANS - fecal and dead or dying material
DO (Dissolved oxygen) can be affected by: - ANS - all of the listed answers
The production of two or more aquacrop species in the same water facility (tank, pond,
etc.): - ANS - polyculture
Bass are considered a _________ fish. - ANS - Warmwater
Salmon are considered a(n) ____________ fish. - ANS - Anadromous (species
migrating from freshwater to the sea)
Which of the following is not one of the main purposes of aquacrops: - ANS - bait
It's a good idea to have a light in the lid of the aquarium because it helps orient the fish
as to direction and time of day, like the sun would - ANS - TRUE
In any aquarium or tank it's best to have the highest ammonia level possible. - ANS -
FALSE
The components of water quality for a freshwater tank that are most important and need
to be checked often (weekly) include chlorine, pH and salinity. - ANS - FALSE
It is important to store fish food properly to prevent: - ANS - all of the listed answers
Bass would be considered a - ANS - Recreational fish
The amount of food a fish will eat depends on: - ANS - all of the listed answers
Tilapia are considered to be a - ANS - Bony Fish
The majority of fish belong to this group. - ANS - Bony Fish
How does a fish pump water over its gills? - ANS - all of the listed answers
The fin that provides the fish power to swim through the water is: - ANS - caudal
The fin that provides the fish the ability to steer/turn in the water is: - ANS - pectoral
The practice of keeping water, equipment and facilities used in growing aquacrops
clean is known as: - ANS - sanitation
DO (dissolved oxygen) can be affected by: - ANS - all of the listed answers
DO is highest at 6pm because: - ANS - any algae or plants in the water have been
photosynthesizing
In aquatic environments plants: - ANS - all of the listed answers
What part of the recirculating system helps the larger solid wastes settle out of the
water? - ANS - clarifier
What part of the recirculating system helps get wastes out of the water with the help of
good bacteria? - ANS - biofilter
Which part of the recirculating system moves dirty water from bottom center of culture
tank up to the clarifier? - ANS - siphon
,AQUACULTURE TEST BANK WITH QUESTIONS AND ANSWERS
A species of fish used as live food for other species is known as feeder fish. - ANS -
TRUE
Goldfish are often the most preferred baitfish because they are the most active when
used as bait. - ANS - FALSE
Water quality components (pH, DO, CO2, Ammonia) can change slightly throughout the
day - ANS - TRUE
Uneaten food left in the tank is a problem because: - ANS - it raises the amount of
ammonia in the water
How do we usually remove solid wastes in a recirculating system? - ANS - the biofilter
and filter pad collect it
How is aeration provided in a tank? - ANS - all the above
What does aeration do? - ANS - increases DO
What factors affect how much DO gets into the water? - ANS - all of the listed answers
What is one reason algae can be a good thing in tanks? - ANS - it can add oxygen and
be an additional food source
When can algae be a bad thing in tanks? - ANS - all of the listed answers
What is the rule of thumb for how many fish you can put in a tank? - ANS - one inch of
fish for every 12" surface area
What are change(s) can occur in among fish during breeding? - ANS - all of the listed
answers
A fish will create a bubble nest to reproduce... - ANS - all of the listed answers
Which variation of fish reproduction has the least chance of survival? - ANS - egg
layers
What are can you do and/or put in your tank to help with territorial fish issues? - ANS -
all of the listed answers
In saltwater/reef tanks fish find food in 2 ways: actively searching and gathering
nutrients blown around by water currents. - ANS - TRUE
Fish only fall into the category of herbivores. - ANS - FALSE
In building a Reef tank, you shouldn't put big piles of closely knit rocks together because
it can cause poor water circulation resulting in stagnant water. - ANS - TRUE
It's ok to feed fish in your saltwater tank after you've turned off the lights. - ANS -
FALSE
The pumps in the salt water tank help recreate the water current that is natural in
salt/reef areas. - ANS - TRUE
If you are 12 years old you have to have an AZ Game & Fishing fishing license to fish in
most AZ lakes, rivers and streams. - ANS - FALSE
To what family does the trout belong? - ANS - Salmonidae
How many species are there in the trout family? - ANS - 68
Fish that lives in salt water but spawns in fresh water. - ANS - Anadromous
Egg in which two black spots-the developing eyes of the embryo-can easily be seen. -
ANS - Eyed egg
Cubic feet per second - ANS - cfs
The average number of pounds of feed eaten by the fish to gain 1 pound of weight. -
ANS - Feed Conversion Ratio (FCR)
A structure for measuring/controlling water flow - ANS - Weir
Containing fully developed eggs; ready to spawn - ANS - Ripe
, AQUACULTURE TEST BANK WITH QUESTIONS AND ANSWERS
Feet per second - ANS - fps
Process that takes place within a 30 to 90 minute period after spawning in which the
egg becomes turgid with water, loses its stickiness, and can no longer be fertilized. -
ANS - Water-hardening
Manually releasing eggs and milt from broodfish - ANS - Stripping
Fry that obtain nourishment from attached yolk sac - ANS - Alvenis (sac fry)
Male Trout - ANS - Cock
Female Trout - ANS - Hen
Length between tip of snout and end of tail - ANS - Total length
Fry that have lost their yolk sac and are ready for food. - ANS - Swim-up fry
Feed that supplies 100 percent of the dietary requirements of the fish; used when there
is little or no access to natural food - ANS - Complete feed
Process of sharply striking egg trays, siphoning eggs from one container to another, or
pouring eggs from incubator trays into tub of water from 2 to 3 feet to detect
undeveloped or infertile eggs - ANS - Shocking
The temperature at which all of the species physiological systems operate optimally -
ANS - Standard Environmental Temperature (SET)
Upward curving hook of lower jaw that occurs at spawning - ANS - Kype
The measurement of both forms of dissolved ammonia, ammonium, NH4+ ionized, and
ammonia, NH3, un-ionized - ANS - Total ammonia
Of the 14 species of trout found in North America, what species is of most importance to
fish farming? - ANS - Rainbow trout
All members of the family are coldwater fish requiring highly pure, highly oxygenated
water below which of the following temperatures? - ANS - 68
Which of the following is the most popular table fish in the U.S. today? - ANS - Trout
What is the leading trout-producing state? - ANS - Idaho
In southern states where trout may be cultured during the winter months in cages, what
is the approximate growing period? - ANS - 150 days
What is the optimum range and the SET for trout culture water temperature? - ANS - 50
to 60; 59
What is the recommended flow rate for raceway and tank culture? - ANS - 0.05 to 0.09
fps
What is the minimum DO concentration where eggs are hatched? - ANS - 7 ppm
What is the most economical water hardness range for trout culture? - ANS - 50 ppm to
250 ppm, dissolved solids or more
Below which of the following levels must nitrite be held for optimum growth and health?
- ANS - 0.1 to 0.2 mg/L
At which of the following values should pH be maintained? - ANS - 7.5 and 8.0
What is the optimum water replacement time for raceways? - ANS - 20 to 30 minutes,
0r 2 to 3 changes per hour
If levels of NH3, un-ionized ammonia, exceed 0.0125ppm, what happens? - ANS - A
decline in trout growth and health may occur
Fingerlings are grown in raceways until they are about 8 to 14 inches long; they are
then sold to restaurants, retail markets, fee-fish operators, or to private owners. - ANS -
Food-fish production
