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Catch & release

Catch and release is where a fish is caught but returned to the water to help preserve fish stocks. Almost all rivers in UK and Ireland encourage catch and release and in many cases it is now compulsory. FishPal is firmly supportive of this initiative - as anglers we must do our bit to conserve our wild game fish. Please release fish at all times, and consult the terms & conditions at your particular fishery so you know the rules.

This page is to give advice on best practice to increase the chances of the fish surviving.

Playing the fish

If you are 'playing' a salmon or trout you can significantly help its chances of survival by applying the information below. It is worth bearing in mind that less than 7% of smolts return as spawning adults, therefore, it is vitally important that the angler is able to return their fish with confidence.

Ensure your rod is strong enough to subdue a fish quickly 1 minute per pound weight is a reasonable suggestion for time for landing a fish. To avoid exhausting the fish use strong leader, for example at least 15lb for a salmon. Salmon are not renowned for being cautious about leader visibility. When playing the fish it is the anglers aim to move it out of the fast current into quieter water and have the angler positioned slightly downstream of the fish.

By being below the fish you are able to ensure it is battling the current as well as the anglers tackle whereas if the angler is upstream of the fish the angler is fighting both the current and the fish. The fight time is therefore lengthened, perhaps un-necessarily. Make sure you pick a safe place to bring the fish in, and once the fish is subdued bring it quickly towards you for hand or net capture.

Landing the fish

Research has shown that exposing a salmon or trout to air for even a short period, for example to take a photograph, can significantly reduce its chances of survival. Keep the fish in the water at all times. Do not at any time lift a fish by its tail or gills as this can cause potentially fatal damage. Later in the season near spawning time, lifting a fish by the tail can rupture the egg sacs in females and milt sacs in males, which can kill the fish. At all times support its belly whilst handling the fish in the water.

Use a large Gye-type landing net with knotless mesh which reduces damage to the fish's scales. Don't 'beach' the fish as this can remove protective mucous and scales, which can lead to fungal infection. A fish cannot be gaffed or mechanically tailed, as both implements will cause considerable damage and probably kill it.

Always handle the fish with wet hands, or with wet soft cotton gloves, when removing the hook from the fish's mouth. This prevents removing the fish's mucous which is its first line of defence against disease and parasites.

It is very important that the fish is kept in the water after being captured and the fish should be supported from beneath, with the hook gently removed either by hand or by means of long-nosed forceps or hook releasing tool. If a hook is deeply embedded and cannot be removed, the leader should be cut close to the hook, as fish released with the hook attached will generally survive. Do not squeeze the fish too hard, and never hold it by the gills.

Releasing and reviving the fish

After removing the hook, or cutting the leader and leaving the fly in the fish, then we should ensure that the salmon or trout will be supported in the water, facing into the current to allow oxygen-rich water to flow over its gills. Oygen is needed to dispel lactic acid which will have built up in the fish's muscles during the fight, causing it to cramp and be unable to swim. Give the fish sufficient time to recover, and remember to be patient especially with a large fish. Hold the fish gently until it is capable of swimming away strongly, you will know it is time when it starts to pulse and kick softly. If you release the fish and it turns 'belly up' then quickly recapture the fish and support it again for a while facing into the current to allow more oxygen to be absorbed.

Avoid weighing the fish if at all possible. If you have to, then weigh it in the net and subtract the weight of the net later. Much better to measure the length of the fish from nose to the fork of the tail - this measurement can later be used to accurately calculate its weight. A tape measure, length of fishing line, bankside reed, your rod, or even a wading stick can all be used to take the length while keeping the fish in the water.

Survival rate is greater at water temperatures below 20°C so be aware of the necessity to quickly subdue and return the fish during the summer months.

Survival chances of released salmon

Research by a number of fishery trusts has shown that the survival rate of salmon and trout caught and released may be close to 100% when we apply the above guidelines and practice.

Spawning success and viability of eggs may be unaffected in salmon caught and released in late autumn using the above guidelines, and they can recover within twenty four to forty eight hours of being captured and are able to spawn successfully.