キャッチ＆リリース（リリーステクニック）
（オーストラリアで推奨されているリリース方法について）

最近のオーストラリアでは、キャッチ＆リリースが盛んに推奨されています。 キャッチ＆リリースの手引きなどは水産庁やボランティアグループなどから発行され、 無料で釣り道具屋さんなどで配布されています。また、インターネッットからも ダウンロードできるのもありますので参照されてください。 今回は、いろいろ推奨されている方法の一般的な部分を簡単に説明します。
さて、下記はキャッチ・アンド・リリースでの推奨方法ですので、絶対ではあ りませんが、魚の生存率を最大にするためになるべく近ずけるように努力して, 魚が元気に泳いでくれるようにしてあげたいものです。
〇なるべく早く釣り上げて、すばやく逃がしましょう。長いファイト時間は、 　魚に強いストレスを与えて弱らせてしまいます。
〇釣り針は、カエシの部分を潰してバーブレスフックにして、簡単に針外しが 　出来き、かつフックによるダメージを少なくしましょう。
〇フックは、サークルフック（和名：ネムリ針）を使うと、口の奥まで針を飲 　み込まれことが少なくなり、魚へのダメージが少なくなります。
〇出来ることなら、水中でフックを外して、そのまま水中から出さないで逃がす方 　法を取りましょう。
〇もし、針を外すために水中から出す場合は、濡れた手や濡れたタオルを使っ 　て、魚の皮膚を傷つけないようにしてあげてください。
　また、魚を持ち上げる場合は、魚自身の体重にも配慮する必要があります。大きな魚は、その自 　らの体重の重さで、垂直に持ち上げると背骨が伸びて骨折して死に至ります。 　（人間でいうと首吊り状態と同じです。）
　お腹の下に手を当てて水平になるように持ち上げます。
〇また，水中から魚を出すときは、なくべく上記の方法を取り、魚を傷つけて 　しまう一般の玉網は使用は避けて下さい。ネットはりリース専用のノットレ 　スメッシュの玉網を使用しましょう。
〇熱くなったボートの金属の上や乾いた桟橋の上など、魚を寝かすと皮膚が傷付 　く恐れのある場所では、濡れたビニールなどを敷くようにしてください。
　また、硬い場所に魚を落とすと、内蔵が破損してまうことがあります。
〇魚から針を外すときは、ペンチか針外し用バサミを使用すると手早く出来ます。
〇もし、フックが口の奥まで針を飲み込まれてしまったときは、無理に外そうとせず、 　針のすぐ上の糸を切って逃がすほうが生存率が高くなります。
〇リリースするときはそっとやさしく逃がしてやってください。
最後に、何尾も釣り上げたとか、誰それや人に勝ったとか、何トンも釣り上げたぞ、と自慢したい釣り人もいれば、釣った大物をうまくリリースに成功して喜ぶ釣り人も大勢います。自然を大切にしながら楽しい釣りをしたいものです。

Fish for the Future


Fish forever - for our children and their children's children.

Fish for fun and recreation.

And fish just to look at!


Fish safely and responsibly so you can enjoy fish in the future.

英語での説明 （一般的なリリーステクニック） To maximise a fish's survival when practicing catch and release, it is important to follow a few simple rules:
Minimise the time spent to land the fish. Long fights on light tackle unduly stress fish and lead to lower chance of survival as a result.
Use barbless hooks whenever possible to minimise hook damage to fish. Use circular hooks. Research in Australia and around the world has shown that the use of circle hooks decreases the incidence of hooking a fish deep in the mouth. Fish caught on circle hooks are usually hooked in the side of the mouth increasing survival of the fish when released.
Avoid taking a fish from the water. If you can, release the fish while it is in the water.
If you do remove the fish from the water, handle it carefully. Use wet hands or a wet towel to minimise damage to its skin. Support its body weight. Minimise the length of time the fish is out of the water.
Avoid using nets to pick up fish. If absolutely necessary, use fish-friendly landing nets with soft knotless mesh to reduce harm to a fish's scales, skin, eyes and fins.
Avoid dropping fish onto the bottom of boats or other hard surfaces as this can cause internal organ damage. Hold fish with a firm grip across the back of the head to remove your hook.
A smooth, wet surface or vinyl covered foam is the most suitable surface to place fish on in order to remove hooks.
Remember many surfaces, especially metal, can become very hot in the sun. Fish skin is very prone to injury or burns and skin injuries can decrease resistance to diseases.
Try to retrieve hooks and release fish as quickly as possible. The use of needle-nosed pliers or hook retrieving devices can greatly reduce the time fish are out of water.
If a hook is located deep inside the fish, cut the line as close as possible to the fish's mouth. This is far better than trying to extract the hook, which could cause internal damage to the fish. Over time, stomach acids should dissolve the hook.
Take care to revive fish upon release if required. This involves gently holding or pushing the fish through the water so that it obtains a good supply of oxygen. Hold the fish upright in the water and move it to and fro for a while.
Avoid releasing fish into warm, shallow margins of lakes and streams if deeper, cooler water is accessible.

(WA)
Any fish you release may join breeding stocks and live to be caught again at a bigger size.
If you hook an unwanted or undersize fish, take the time to release it gently, using the following steps:
If possible, avoid lifting fish from the water to unhook them. If you need to lift a fish from the water, use a knotless landing net or place a wet hand or rag under the fish's stomach to support the vital organs.
Use a foam landing mat to avoid bruising the fish. Place fish on a wet surface, avoiding hot, dry areas.
Use wet hands or a wet rag to hold the fish so damage to its slime layer is minimised. Follow the directions from the previous page for removing the hook or cutting the line if the hook is in the fish's gut or gills.
Treat fish gently to reduce stress and injury ? scale damage or the removal of the protective mucous coating over their scales can lead to infections. Return the fish to the water as soon as possible.
If you release a fish and it seems to lie on its side or gradually sinks, it may be tired and lacking oxygen. Hold the fish from above, behind the head, moving it through the water as if it was swimming, repeating as necessary. This action pushes water over the fish’s gills so it can get enough oxygen to recover. The fish will soon give a few kicks, indicating it is ready for release.

Barotrauma showing the stomach pushed out through the fish's mouth. Some fish species such as West Australian dhufish, cod and tuskfish can suffer from barotrauma when caught from a depth of 20m or more.

Barotrauma is the expansion of gases in the fish’s body due to a decrease in pressure. The most obvious symptoms include bloated stomach, ‘popped’ eyes and the stomach pushed out through the mouth or gills.

Fish suffering from barotrauma may not be able to return to the bottom and shelter when released if the swim bladder remains infl ated. Anglers must take extra steps to help ensure these fish survive.

Return fish to the water using a release weight. The barbless hook on the weight is attached through the lip of the fish. When the fish reaches the bottom, a gentle tug on the line will allow the fish to swim free.

The best way to return such fish to the water is to use a device called a “release weight”, available from tackle shops. It is essentially a weighted barbless hook which can be connected to an existing fishing rig via a clip, or used on a rod and reel or handline specially set aside for releasing fish. Pierce the barbless hook through the fish’s lip and gently lower the fish through the water. The release weight is easily detached by a tug on the line when the fish reaches the bottom, leaving the fish back at the depth where it was captured.

To ensure released fish have the best chance of survival, it is important to understand the effects of catching and releasing fish and the causes of fish mortality. Effects vary between species, individual fish and different sizes of fish. The Department of Fisheries, together with RecFishwest and the Australian National Sports Fishing Association, is conducting research on the survival of released demersal (bottom-dwelling) fi nfish, focusing mostly on dhufish and pink snapper.

A long-shanked hook. A circle hook. Minimising hook damage will improve the survival chances of fish returned to the water.
Deep hooking in the gills, throat or gut causes the greatest mortality as the hook can damage vital organs. Using larger hooks or hook types that improve lip hooking (such as circle hooks) will reduce the chance of the fish swallowing the bait. Using lures (with the right type of hook) rather than bait will also signifi cantly reduce the incidence of deep hooking.

Barded hooks may be simply 'crimped' with piliers, crushing the barb Barbless hooks and long-shanked hooks assist penetration and hooking of fish, and are also easier for the angler to remove. This helps reduce mortality in released fish. Buy barbless hooks from tackle shops or modify barbed hooks by crushing the barbs with a pair of pliers.
The treble hook can inflict major injuries to the fish. Treble hooks should be avoided!
Treble hooks should be avoided as they can cause major injuries, reducing the chance of fish surviving when returned to the water.

Removing Hooks
If a fish is hooked in the gut or gills, cut the line 20-30 cm from the hook to give it the best chance of survival.
Long-nosed pliers can be used to help remove hooks, especially for fish with teeth or spines that need to be avoided. Dedicated hook extractors may also be bought from some tackle shops.

If a fish that is to be released is gut-hooked or deep-hooked, the hook should be left in place as vital organs could be damaged in trying to remove it. The hook will rust away in time. Cut the line 20-30 cm from the hook to reduce the possibility of the line impeding the fish’s ability to feed.

(NT)
For release
If practical and safe, remove the hooks while the fish is still in the water. Alternatively, the use of landing nets is recommended as a safe option for the angler and the fish. The fish should be released as soon as possible after capture. Most fish can be fatally damaged if they are suspended by the gills so a cradle hold is recommended, especially for larger fish. To reduce such damage, many anglers weigh larger fish while they are in a landing net and then subtract the weight of the net to gain an accurate weight of their released catch. Smaller fish without teeth can be held by gripping the lower jaw firmly.

Don’t lay a fish which is to be released on a hot surface or allow it to thrash around on a boat’s deck or the ground. If it is safe to do so, revive a tired fish by holding it gently in the water with its head facing into any current to allow water to pass over its gills. Pelagic fish such as tuna and mackerel are fragile and tolerate minimal handling. It is often best to spear them head first back into the water to force a rush of water through their gills.

Swim bladders of many fish caught from deep water often distend resulting in fatality after release. It therefore makes sense to move or target different species if your catch is nearing a possession limit or the amount of fish required.

The use of barbless hooks is also worth considering as they can usually be removed quickly and easily from fish or a hapless angler. You can catch just as well with barbless hooks, provided you keep tension on the line.

(SA)
-Unhooking fish while they remain in the water.
-Wetting your hands. If you must hold fish, this will reduce damage to it's protective slime.
-Moving quickly. Fish were never designed to be out of water.
-Treating hooks as expendable. Gut or gill hooked fish fare better if the line is simply cut.
-Supporting larger fish. A hand under the head and belly will minimise damage to the backbone, which can otherwise lead to delayed mortality.
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