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56 Cards in this Set
- Front
- Back
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Are carbohydrates the key to rapid fish growth? |
Yes |
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Is a practical diet used to determine the nutrient requirements of a species? |
No |
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Does the US rank in the top 3 countries for exporting seafood products? |
No |
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Is phytase added to feed to make nitrogen more available? |
No |
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Are catfish able to utilize starch in feeds? |
Yes |
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Are high food conversion ratios more desirable? |
No |
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Is high food conversion efficiency more desirable? |
Yes |
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Where did aquaculture originate? |
China |
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A typical fish farmer is most likely to feed their fish using which kind of diet? |
Practical diet |
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What is the first aquaculture fish species? |
Carp |
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Which country is the world leader in domestic aquaculture production? |
China |
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Is red muscle glycolytic or aerobic? |
Aerobic |
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Do most fish have more white or red muscle? |
White |
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What type of fish are able to utilize starch in feeds? |
Omnivores and herbivores |
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How would you fix brown blood in fish? |
Add NaCl |
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How would you fix low dissolved oxygen? |
Degassing tower, air stones, air blowers, pure oxygen |
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How would you fix high CO2? |
Degassing tower or surface agitation |
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How would you fix low alkalinity and hardness? |
Low pH: Limestone High pH: Lime |
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How would you fix high ammonia? |
Stop feeding |
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What goes in the box? |
Dissolved oxygen |
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What goes in the box? |
Carbon dioxide |
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Draw the nitrogen cycle |
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How do protein requirements of fish compare to terrestrial animals? |
Fish have higher protein requirements and are generally carnivores |
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Is the culture of freshwater gastropods more difficult than the culture of freshwater mussels? |
No |
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Do carnivorous fish need to be sorted at regular intervals in a hatchery setting? |
Yes |
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Are freshwater mussels resilient to changes in water chemistry? |
No |
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What are eggs usually quantified by? |
Volume |
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What are larval to adult fish usually quantified by? |
Weight |
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What does vitellogenin do? |
It is produced in the liver, binds to Ca in the blood, is deposited in the eggs, and helps form yolk |
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How do fishes benefit in regards to conservation breeding? |
Easy to capture and transport, easy captive breeding, high reproductive output, and early reproductive maturity |
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What is the order of gonadal development during the reproductive cycle? |
Maturation, ovulation, refractory, recrudescence
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What does HPG stand for? |
Hypothalamus Pituitary Gonad |
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What hormone does the hypothalamus release? |
GnRH |
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What hormone does the pituitary release? |
GTH 1 and GTH 2 |
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What hormones do the gonads release? |
Testosterone and estradiol |
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What are some important genetic considerations? |
Increased growth rate, resistance to stress, FCR and FCE, and changing rate of sexual maturation |
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What are individuals selected for? |
Growth rate and age of maturity |
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What are families selected for? |
Fat content |
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Which is a more powerful selection method, individual or family? |
Family |
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What is the point of cross breeding? |
Avoid inbreeding depression, cross types, and increase genetic diversity |
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What does the polarization of an egg mean? |
Nucleus is moving towards the outer edge of the egg for easier receiving of sperm |
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What are practical uses for triploidy? |
Sterilization of exotics and larger growth |
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Where is all the US crawfish cultured? |
Louisiana |
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Where do alligator eggs come from? |
The mother's nest |
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What percentage of alligator eggs are returned to the wild? |
12% |
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What are important considerations when collecting alligator eggs? |
Don't wash them and the embryo will drown if the egg gets flipped upside down |
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Why are sturgeon a targeted culture species? |
Caviar |
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What are three kinds of weed control methods? |
Mechanical, chemical, and biological |
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During a natural disaster, what happens to the supply curve for wild caught fish? |
Moves up |
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When the supply curve for wild caught fish increases, what happens to the demand curve for aquaculture species? |
Moves up |
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What does elastic change mean? |
Small change in price will dramatically change demand |
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What does inelastic change mean? |
Large change in price will not dramatically change demand |
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What term was coined for human fishing practices? |
Fishing down the food chain |
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What term was coined for farming practices? |
Farming up the food chain |
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What does FIFO stand for? |
Fish in, fish out ratio |
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Why is beef cattle so high in resource use? |
Animal's fecundity It takes a lot of energy to reproduce and raise broodstock |
