Observe fish and beds or ponds to detect diseases, monitor fish growth, determine quality of fish, or determine completeness of harvesting.
Record the numbers and types of fish or shellfish reared, harvested, released, sold, and shipped.
Assign to workers duties such as fertilizing and incubating spawn, feeding and transferring fish, and planting, cultivating, and harvesting shellfish beds.
Confer with managers to determine times and places of seed planting, and cultivating, feeding, or harvesting of fish or shellfish.
Direct and monitor worker activities, such as treatment and rearing of fingerlings, maintenance of equipment, and harvesting of fish or shellfish.
Prepare or direct the preparation of fish food, and specify medications to be added to food and water to treat fish for diseases.
Engage in the same fishery work as workers supervised.
Train workers in spawning, rearing, cultivating, and harvesting methods, and in the use of equipment.
Direct workers to correct problems such as disease, quality of seed distribution, or adequacy of cultivation.
Supervise the artificial spawning of various salmon and trout species.