A) 10-15°C B) 35-40°C C) 5-10°C D) 26-30°C
A) Clarias gariepinus B) Oncorhynchus mykiss C) Salmo salar D) Cyprinus carpio
A) 5-10 fish/m² B) 100+ fish/m² C) 50-60 fish/m² D) 20-30 fish/m²
A) Algae B) Detritus C) Zooplankton D) Commercial feed
A) 5-10% B) 28-32% C) 40-45% D) 10-15%
A) Dissolved oxygen B) pH C) Temperature D) Water clarity
A) 9.0-10.0 B) 2.0-3.0 C) 4.0-5.0 D) 6.5-8.5
A) Tuberculosis B) Saprolignia C) Ichthyophthirius D) Columnaris
A) High stocking density B) Ignoring water parameters C) Overfeeding D) Water quality management
A) Depending on nutrient levels B) Never C) Weekly D) Daily
A) Remove algae B) Decrease pH C) Increase dissolved oxygen D) Reduce water temperature
A) 0.1-0.2 kg B) 2-3 kg C) 5+ kg D) 0.5-1 kg
A) Hook and line B) Dynamite fishing C) Electrofishing D) Seine netting
A) Glass pond B) Concrete pond C) Plastic pond D) Earthen pond
A) Attracts predators B) Decreases water quality C) Removes predators and competitors D) Increases algae growth
A) Kill bacteria B) Increase water turbidity C) Improve gut health D) Reduce oxygen levels
A) Reduces feed efficiency B) Increases disease outbreaks C) Maintains water quality D) Decreases fish growth
A) Beneficial for growth B) Reduces algae blooms C) Toxic to fish D) Increases oxygen levels
A) 0.5 meters B) 2.5 meters C) 1-1.5 meters D) 3+ meters
A) Decrease oxygen B) Remove algae C) Adjust pH D) Increase salinity
A) Less water pollution B) Slower growth C) Lower cost D) Balanced nutrition
A) Adding fertilizer B) Decreasing water depth C) Increasing fish density D) Manual removal
A) Increase mortality B) Reduce growth rate C) Lower water quality D) Determine the best feed
A) Growth rate B) Soil type C) Air temperature D) Cloud cover
A) Only at night B) Once a week C) Once a day D) 3-4 times per day
A) Algae bloom B) Fish gasping at the surface C) Clear water D) Fish swimming actively
A) Promote algae growth B) Increase production costs C) Reduce fish growth D) Prevent disease introduction
A) Separate fish by size B) Increase disease transmission C) Reduce growth rate D) Promote cannibalism
A) Reducing aeration B) Adding sugar C) Increasing water depth D) Biological control
A) Higher input costs B) Reduced productivity C) Resource recycling D) Increased pollution |