Throughout the month of March, children from several schools across Perth & Kinross were given the responsibility of looking after salmon eggs in their classroom. During this period the eggs would hatch into ‘alevins’ – a stage in their life-cycle where they survive entirely off a yolk sac until they are ready to catch their own food. The eggs were very successful this year, with over 95% of the eggs surviving!
Once the alevins were ready, they were brought to Annaty Burn at Quarrymill to be released. Here they will spend their next two years living mainly off small invertebrates, and avoiding the numerous predators including other fish, otters, heron and kingfisher. Before the salmon could be released, the children were also shown how to do several tests in the river – looking at the clarity, speed and pH of the water. It is important to know that the river isn’t too polluted, otherwise the fish would have little chance to survive. The children released the fish into the burn, watching as they quickly hid under rocks and stones.
In April the children were able to visit the hatchery, where their eggs originated from. Here they were able to see more stages of the salmon life-cycle from the initial eggs to adults. In the hatchery all of the half-million eggs are counted by hand, raised until they are ready to be put in the river, and given the best survival chances possible. The children learned about how fishermen have to be quite clever to catch their salmon, and how they worked to prevent illegal poaching – they especially enjoyed dressing up in the camouflage clothing!
In June the health of the salmon released into Annaty Burn will be checked by the schools when they go electrofishing. Not as dramatic as it sounds, the fish are stunned using a small electric current and netted. This allows us to see the how well the fish are doing, and see the great difference in size from when they were initially released. The fish are then returned to the water quickly and unharmed.
Have you seen any salmon where you live, or have you ever had any experience fishing?
Let us know in the comments or on our share page.