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Fisheries technicians/technologists study fish and their environment and can work with both wild populations and hatchery-raised stock. Working with a variety of fish species and habitats, fisheries technicians/technologists are often responsible for sampling and gathering data and supporting research and fisheries management. They play a key role in the conservation and protection of Canada’s fisheries resources.
At a glanceImagine you are standing in chest-high water 10 metres out from the shore of a large lake popular with sport fishermen. You are a fisheries technician/technologist working for a local trout hatchery and you are in the process of restocking the lake with rainbow trout in preparation for the upcoming tourist season. You're holding the end of a large hose that is draining into the lake, watching carefully as hundreds of juvenile trout empty into the water. Restocking area lakes is an annual activity that keeps you busy and outdoors during the summer. This lake is only the first of 50 or so you will stock in the coming months.As a fisheries technician/technologist, you have experience working with both wild and farmed fish stocks, particularly when it comes to restocking wild populations with trout raised at the hatchery. Several months ago, you assisted a group of fisheries biologists surveying fish populations in the lake, using gillnets and trawls to catch and measure trout. The results of this survey were used to determine how many hatchery-raised trout need to be added to the lake to bring population levels to where they should be.Once the hatchery's trout were big enough to be transported and put into the lake, you began the sensitive task of moving the trout. Trout are sensitive to drastic changes in water temperature, so you first had to make sure the lake temperature was within 5°C of the hatchery's tanks. Then you loaded the trout into four 1,800-litre storage tanks on the back of a five-tonne truck. You checked the tanks to make sure the fish weren't too crowded and oxygen levels were high enough for the ride to the lake.When you arrived at the lake, you connected a series of hoses 25 centimetres in diameter that run from the truck into the water. While you monitor the end of the hose, one of your partners flushes the tanks and trout into the lake. You will repeat this process dozens of times over the next few months as your hatchery restocks local trout populations.
Job dutiesDuties vary significantly from job to job, but the following list includes typical job duties one might encounter as a fisheries technician:
- Assist in the breeding and rearing of marine species in hatcheries, including creating incubation plans, taking inventories of fish eggs, and cleaning and maintaining incubation units.
- Collect biological data from various fish species, for example length, weight, sex, and age.
- Collect and analyze stomach contents for diet and nutrition studies and tissues for contaminants.
- Diagnose, recommend, and administer appropriate treatments for sick fish, including identifying common parasites.
- Establish daily growth rates and rearing temperature regimes to meet production targets.
- Select fish suitable for release to specific lakes, rivers, or ponds.
- Survey lakes, rivers, ponds, and marshes to identify fish species, insects, and flora using various sampling techniques and equipment.
- Monitor fish populations using a variety of equipment, for example nets and electrofishers.
- Track fish using telemetry on land, water, and in the air.
- Operate and maintain equipment such as boats, nets, and water chemistry meters.
- Contribute to the development of education programs and public information campaigns for hatcheries and fisheries management.
- Maintain records of production, breeding, and treatment programs.
Work environmentFisheries technicians work in a variety of locations, including, but not limited to:In the office:
- Maintaining databases of information, for example records of growth, feeding, and mortality rates
- Analyzing data and preparing reports
- Communicating on the phone and in meetings with colleagues, supervisors, government officials, and the public
- Monitoring fish populations and stock
- Cleaning and maintaining equipment
- Collecting samples and specimens
- Operating large and small vessels and other equipment
- Processing samples and specimens
Where to work
- Commercial fish farms and hatcheries
- Federal, provincial/territorial, and municipal government departments
- Colleges, universities, and research institutes
- Environmental consulting firms
- Marine science institutions and aquariums
- Not-for-profit and non-governmental organizations
- Self-employed consultant
Education & requirementsIn most cases, the minimum education requirement to work as a fisheries technician is a college technical diploma. The following post secondary programs are most applicable to a career in this field:
- Fisheries and biology
- Fish and wildlife
- Marine biology
- Aquatic biology ecology