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WorksheetsMilkfish and Pond Preparation
Total questions: 30
Worksheet time: 23mins
In which year did bangus farming start in the Philippines?
2000
1990
1975
1863
What is the most commercially important fish species in the Philippines?
Chanus chunus
Channidae
Chanos chanos
Channos chanos
What is the average harvest size of bangus?
100-200 grams
250-600 grams
700-900 grams
1-2 kg
What percentage of fry in the Philippines is sourced from Indonesia?
30-40%
50-60%
70-80%
90-100%
What is the breeding ratio for milkfish?
1 Female:1 Male
1 Female:2 Males
1 Female:3 Males
1 Female:4 Males
How long does it take for milkfish to reach maturity?
3 years
10 years
5 years
7 years
At what time does spawning occur for milkfish?
10AM-12PM
12AM-2AM
2AM-6AM
6AM-10AM
What is the average weight of an 8-year-old female bangus?
6 kg
5 kg
4 kg
3 kg
What type of water can milkfish survive in?
Freshwater, brackishwater, and marine water
Only marine water
Only freshwater
Only brackishwater
What is the size of fry when they are sourced from the hatchery?
1-2 inches
4-5 inches
2-3 inches
3-4 inches
What type of feeding is recommended in the nursery pond?
Natural food only
Fry mash
Commercial feeds only
Both natural and commercial feeds
What is the recommended feed per fish per day in the rearing pond?
2 kg
500 grams
1 kg
1.5 kg
What is the duration of the conditioning phase in the aquaculture process?
1-2 days
1-2 weeks
2-3 weeks
3-4 weeks
What is the primary source of fry for milkfish in the Philippines?
Local hatcheries
Wild catch
Indonesia
Thailand
What type of algae is referred to as 'lumot'?
Blue-green algae
Filamentous green algae
Brown algae
Red algae
Why is pond drying essential in pond preparation?
It eradicates fish diseases.
It oxidizes harmful chemical substances like sulfides.
It improves water quality.
It increases fish growth rates.
How long should a pond be dried?
1-3 days
3-5 days
7-15 days
15-20 days
What is the purpose of plowing in pond preparation?
To eradicate aquatic plants.
To enhance nutrient availability and eliminate burrowing fish enemies.
To fill the pond with water.
To prevent pests from entering.
Which organic substance is commonly used for pest elimination in ponds?
Teaseed cake/powder
Lime
Rotenone
Fertilizer
What is Rotenone derived from?
Fish scales
Plant roots (Derris uliginosa or Derris elliptica)
Soil microorganisms
Algae
What is the recommended concentration of Rotenone extract for pond treatment?
10 g per ton of water
25 g per ton of water
50 g per ton of water
100 g per ton of water
Which combination forms a piscicide in pond treatment?
Lime and fertilizer
Hydrated lime and ammonium sulfate
Rotenone and water
Teaseed powder and lime
What is the ideal pH range for pond soil to support fish growth?
4.5-5.5
6.0-7.0
6.5-8.0
8.5-9.5
When should a pond be limed?
When the soil pH is above 8.0
When the water temperature is low
When the soil pH is below 6.5
When there is excessive algae growth
How much lime should be applied per hectare of pond?
100-200 kg/ha
250-500 kg/ha
500-1000 kg/ha
1000-1500 kg/ha
What mineral, identified by its yellow color, can indicate an acidic pond bottom?
Lime
Sulfate
Jarsite
sodium
Which lime type has the highest efficiency rating in reducing soil acidity?
Slaked lime (Ca(OH)2)
Agricultural lime (CaCO3)
Unslaked lime (CaO)
Dolomitic lime
How long should lime be left in the pond before filling it with water?
1 day
2-4 days
5-7 days
10 days
What is the recommended rate of organic fertilizer application for ponds?
500-1000 kg/ha
1000-2000 kg/ha
2000-3000 kg/ha
3000-4000 kg/ha
What is the recommended rate of inorganic fertilizer application for ponds?
50-100 kg/ha
100-200 kg/ha
200-400 kg/ha
500-1000 kg/ha
