AQUACULTURE
I. COMPETENCIES/TASKS ADDRESSED
A. Classify fish, shellfish, and crustacea in the aquaculture industry according to common name, scientific classification, warm/cold/salt water (habitat), feeding habits, and status (endangered, threatened, candidate, common).
B. Cut, thread, and assemble common materials utilized in the aquaculture industry.
C. To test water for dissolved oxygen, pH, ammonia and tank inflow in liters per minute.
D. To weigh fish and determine the correct feeding ratio for a given tank.
E. To fillet Tilapia and/or process and package trout in the round.
F. Describe and identify management practices, diseases, equipment, facilities and production methods in the aquaculture industry.
II. OBJECTIVES
1 To test the student's ability to: a. use and understand aquaculture terms b. identify important species in the aquaculture industry c. recognize and use basic aquaculture equipment and instruments d. correctly determine feeds and feeding ratios e. process fish according to industry standards
III. RULES OF CONTEST
1. A team will consist of four members. The team score will consist of the sum of all four contestants individual scores. Ties will be broken from written exam score.
2. The contest will consist of three parts: (a) written exam; (b) species identification exam; (c) practicums (one practicum for each team member)
3. Scoring will be as follows: a. 50 question written exam 100 pts. 30 minutes will be allowed for written exam. Questions for written exam will be taken from "Aquaculture" available from the Mid American Vocational Curriculum Consortium, Inc., 1500 West Seventh, Stillwater, Oklahoma 74074-4364.
b. Species identification 100 pts. 30 minutes will be allowed for species identification. (20 species selected randomly from a list of 65, 1 pt. ea. for common name, scientific name, habitat, feeding habits, and status). Arizona Game and Fish Educational Resources, (contact Kelly Burgett, Environmental Education Administrative Assistant. 2221 W. Greenway Road, Phoenix, Arizona 85023, phone (602) 789-3220, also library references and Internet are suggested.
c. Practicums (one per contestant at 50 pts. each). Practicum should be selected in advance. Students will have 30 minutes to complete practicum. Practicums will consist of the following:
1. Cutting, threading and assembling common materials used in the aquaculture
industry See detailed plans contained within.
2. Processing tilapia filets and/or trout in the round. See attached scoresheet.
3. Testing of tank water for dissolved oxygen, pH, ammonia load, and liters
per minute inflow. See attached scoresheet.
4. Given three fish to weigh and a tank consisting of 400 fish, to determine
the correct feeding ratio based on 2% of biomass. See
attached scoresheet.
Fish Identification List:
Common Name Scientific Name Status
1. Brown Trout Salmo
trutta
Common
2. Brook Trout Salvenis
fonitinalis Common
3. Smallmouth Bass Micropterus
dolomieni Common
4. Northern Pike Esox
lucius Common
5. Channel Catfish Ictalurus
punctatus
Common
6. Apache Trout Oncorhynchus
apache Threatened
7. Tilapia Tilapia
mossambica Common
8. Black Crappie Pomaxis
nigromaculatus Common
9. White Bass Marone
chrysops Common
10. Yellow Bass Marone
mississippiensis Common
11. Bluegill Lepomis
macrachirus Common
12. Green Sunfish Chaenobryttus
cyanellus Common
13. Largemouth Bass Micropterus
salmoides Common
14. Cutthroat Trout Salmo
Clarki Common
15. Rainbow Trout Salmo
gairdneri
Common
16. Flathead Catfish Pilodictus
olivaris
Common
17. Striped Bass
Marone saxatilis Common
18. Walleye Stizostedion
vitreum Common
19. Colorado Sqauwfish Ptychocheilus
lucius Endangered
20. Virgin Chub Gila
seminuda Endangered
21. Little Colorado Spinedace Lepidomeda vittata Threatened
22. Beautiful Shiner Cyprinella
formosa Endangered
23. Sonora Chub Gila
ditaenia Endangered
24. Loach Minnow Rhinichtyhs
cobitis Threatened
25. Spikedace Meda
fulgida Threatened
26. Desert Pupfish Cypdnodon
maculadus Endangered
27. Desert Sucker Catostomus
clarki Common
28. Machete Elops
affinis Common
29. Gila Trout Oncorhynchus
gilae
Endangered
30. Yaqui Catfish Ictalurus
pricei Endangered
31. Striped Mullet Mugil
cephalus Common
32. Gila Chub Gila
intermedia Threatened
33. Roundtail Chub Gila
Robusta Threatened
34. Bonytail Gila
elegans Endangered
35. Little Colorado Sucker Catostomus
sp. Common
36. Flannelmouth Sucker Catostomus
latipinnis Common
37. Yaqui Sucker Catostomus
bernardini Endangered
38. Bluehead Sucker Catostomus
discobolus Common
39. Humpback Chub
Gila cypha Endangered
40. Razorback Sucker Xyrauchen
texanus Endangered
41.Yaqui Chub Gila
purpurea Endangered
42. Woundfin Plagopterus
argentissimus Endangered
43. Gila Topminnow Poeciliopsis
c. occidentalis Threatened
44. Yaqui Topminnow Poeciliopsis
a. sonoriensis Endangered
45. Mexican Stoneroller
Campostoma ornatum Endangered
46. Virgin Spinedace Lepidomeda
mollispinis Endangered
47. Longfin Dace Agosia
chrysogaster Common
48. Sonora Sucker Catostomus
insignis Common
49. Crayfish Cambarus
diogenes Common
50. Chinook Salmon Oncorhynchus
tshawytscha Common
Students Name_____________________________ School____________________________________
Contestant ID Number_____________
COMMON NAME SCIENTIFIC NAME STATUS HABITAT FEEDING HABITS
Students Name___________________________ Contestant ID Number____________
Chapter__________________________________
PRACTICAL TEST - ASSEMBLY OF MATERIALS USED IN AQUACULTURE
Cut, thread, and assemble copper pipe, galvanized steel pipe, and PVC pipe. Use drill and taps to mount brass air line adapter. 30 minutes will be allowed to complete the following plumbing project containing components commonly used in an aquaculture facility.
1/2" copper male adapter
3/8" brass air tubing adapter
1/2" copper pipe 1/2" galvanized steel 1/2" PVC pipe
5" 5" 5"
1/2" Sch. 40 PVC female adapter 1/2" galvanized threaded cap
Scoring:
1. Pipe cut to length (5 pts) .............................................................._____
2. Copper joints soldered correctly (5 pts) ..................................…._____
3. Appropriate drill selected (5 pts) .....................…………………._____
4. Hole drilled squarely (5 pts) . ………………………………......._____
5. Threads cut cleanly (5 pts) ....................................................…..._____
6. Appropriate tap selected (5 pts) ...................................….....…..._____
7. PVC fittings assembled correctly (5 pts) ....................…......…….._____
8. Overall assembly (15 pts) ...............................................…......…_____
Total Score (50 pts max) _____
Students Name____________________________ School__________________________________
Contestant ID Number____________
PRACTICAL TEST - WATER ANALYSIS
Complete the following tests on the tank provided and record your answers on this sheet. You may use your own equipment or the equipment provided. Remember to adjust DO meters for Tucson altitude which is approximately 2500 feet. You have 30 minutes to complete the contest.
Test Answer Score
Dissolved oxygen in ppm (10) _______ ______
Ammonia Load in ppm (10) _______ ______
ph (10) _______ ______
water inflow in liters per minute (10) _______ ______
Proper knowledge of equipment (10) _______ ______
Total ______
PRACTICAL TEST - DETERMINING FEED RATIO
DIRECTIONS:
In this activity, you will weigh fish and determine biomass in order to formulate a proper feed ration. Because feed is a high cost, it is important not to overfeed. Fish have a tendency to gorge themselves when overfed, causing a fatty fish and producing off flavors when eaten. Additionally. underfeeding will increase the length of production time. Care must be taken to produce a quality product with minimum costs.
STEPS:
STEP I - Fill a one gallon beaker about half way with water and weigh it using the balance. Remember, if you use counter weights, you must add them to the total weight obtained.
STEP 2 - Carefully remove 3 fish from a tank and place them in water. Add weight until the balance is centered. Record the new weight.
STEP 3 - Return fish to water
STEP 4 - Plug numbers into formula and determine how much feed is needed per day.
FORMULA TO USE:
.025
( A+B+C ) N=X
3
.025 = the percentage of biomass we feed (2.5%).
A+B+C = each individual weight of the fish.
3= the total number of fish weighed.
N= the total number of fish in the tank.
X= the amount of feed needed per day.
NOTE: This formula must be memorized prior to contest. There is 50 points possible for this practicum (5 points for each step performed correctly and 25 points for the correct answer.) The breakdown is as follows:
Steps 1-4 performed correctly for up to 20 points.
Formula used correctly for 5 points.
Correct answer for 25 points.
PRACTICAL TEST - PROCESS AND PACKAGE A TROUT
Students Name:____________________________________ Date:______________
Evaluator's Name:__________________________________ Attempt no.:________
PROCESS
EVALUATION
(EVALUATOR NOTE: Place a check mark in the "Yes" or "No" blanks to designate whether or not the student has satisfactorily achieved each step in this procedure. All items listed under "Process Evaluation" must receive a "Yes" for the student to receive the 20 points for this practicum.)
The student: Yes No
1. Prepared ice bath _____
_____
2. Removes scales as required _____ _____
3. Cleaned gut and gill cavities properly _____ _____
4. Placed trout in lice bath _____ _____
5. Packaged, weighed and labeled trout (date and weight) _____ _____
6. Properly discarded waste and cleaned equipment _____
_____
Evaluator' s comments:___________________________________________________________________________
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PRODUCT EVALUATION
(EVALUATOR NOTE: Rate the student on the following criteria by circling the appropriate numbers (See perfomance evaluation key below.) Add up the total numbers circled and enter the total score from this page in the space provided below.) ______________________________________________________________________________________________
Criteria:_________________________________________________________________________________________
Scrubbing Complete Acceptable
Poor
Unacceptable
and Gutting 4
3
2 1
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Product Neat
Acceptable
Poor
Unacceptable
Preparation 4
3
2 1
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Packaging and Complete
Acceptable
Fair
Unacceptable
Weighing 4
3
2 1
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EVALUATOR'S COMMENTS____________________________________________________________________
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PERFOMANCE EVALUATION KEY
4
-- Skilled
3
--Moderately skilled
2
-- Limited skill
1
-- Unskilled
Total Points from this page:_________
Add 20 only if all "Yes" boxes are checked on previous page: _________
Total Score: _________
AQUACULTURE FIELD DAY EXAM - old example
Team Name______________________ Personal Name_____________________________
1. The country which grows the most aquaculture products is
a. Japan
b. China
c. United States
d. Bolivia
2. The biggest aquaculture crop in the US is
a. Catfish
b. Trout
c. Sturgeon
d. Largemouth Bass
3. The first limiting factor in most aquaculture operations is
a. food
b. oxygen
c. carbon dioxide
d. ammonia
4. The scale for measuring the degree of acidity and alkalinity is
a. DO
b. unionized NH3
c. the Fitzsimmons scale
d. pH
5. The oldest known textbook of aquaculture in Tilapia Aquaculture is
a. by K. Fitzsimmons
b. Carp Culture by Fan Li
c. Aquaculture Diary by J. Morgan
d. Trout Culture by B. Franklin
e. Shrimp Culture by U. Fukada
f. Aquaculture for Idiots by I Wona No
6. A good feed conversion ratio is
a. 3:1
b. 4:1
c. 2:1
d. 5:1
7. Raceway culture of trout is an example of ( intensive or extensive) fish culture.
8. Match the species with the common name
a. Catfish 1.
Oreochromis niloticus
b. Tilapia
2. Crassostrea gigas
c. Trout
3. Peneaus vannamei
d. Striped bass
4. Ictalurus punctatus
c. Crayfish 5.
Oncorhynchus gairdneri
f. Freshwater prawn 6.
Morone saxatilis
g. Marine shrimp
7. Macrobrachium rosenbergii
h. Pacific Oyster 8.
Procambaris clarkii
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