hooks barbed none barbed and size

[beachball]

Here we go this is a question that usually causes all sorts of debate amongst anglers.
Have any of your boffins done any research into the effects of barbed verses barbless and also the effect of size of hook.
the reason being
i think a smaller barbless hook is better for the fish rather than a larger barbed hook when i have fished with say a maximum hook size of 10 barbless i have found it tends to wedge into position and not move but is easier to remove than a barbed hook.
larger hooks that tend to go through the lip barbless i can understand will do more damage but i feel adding a barb so they don't move around doesn't really help very much as i think it will tend to tare as it is removed .
what is healing like on fish they don't seem to heal like we do.
tregards Malc.

[envagencyyorkshire]

Hi,

I'm not aware of any EA research on this. I've just done a very quick search on the internet for relevant research papers, but I'll need a bit more time to translate the results into English.

I'll post something in this thread after the webchat's finished. This might take me a few days as I've got quite a few site visits to carry out in the coming week.

Cheers,

Jerome.

[beachball]

Sept 8, 2011 13:58:55 GMT envagencyyorkshire said:

Hi,

I'm not aware of any EA research on this. I've just done a very quick search on the internet for relevant research papers, but I'll need a bit more time to translate the results into English.

I'll post something in this thread after the webchat's finished. This might take me a few days as I've got quite a few site visits to carry out in the coming week.

Cheers,

Jerome.

Thanks Jerome i'm sure our members will be very interested into your findings i know i will best regards Malc.

[envagencyyorkshire]

Hi,

I’ve uncovered quite a few research papers on this subject. I’ve not had time to do a comprehensive literature review for you, but I have found one review paper, published a few years ago that summarised research up to that time (2006).

Overall, it seems that survival tends to be no worse using barbless hooks than barbed, and in some circumstances can be increased. Hooking location is one of the key factors affecting survival, rather than hook type. Deep hooked fish, which bleed, are more likely to die after release than lip-hooked fish. If a fish is deep hooked with a barbless hook, it might be quicker and easier to release, than it would be if the hook were barbed. This could reduce the mortality rate. Factors such as handling time and method (e.g. unhooking in water or in air), hook number (e.g. trebles over singles), bait type and water temperature are also going to affect the chances of injuring a fish.

The New Zealand Journal of Veterinary Science published an article summarising worldwide research into the effects of recreational angling on fish in 2006. It said:

• Minimising the number of hooks on lures and baits, and using barbless hooks and circle hooks generally reduce rates of injury and the severity of tissue trauma.
• Capture time, handling time, and exposure to air play significant roles in the stress responses of fish and should be minimised by anglers.


[Davie, PS & Kopf R.K. (2006) Physiology, behaviour and welfare of fish during recreational fishing and after release. New Zealand Veterinary Journal 54(4): 161-172]

Jerome.

[beachball]

Thanks Jerome that goes a little way towards an answer so basically they are saying for deep hooked fish it is better to have a barbless hook as it is easier to get rid of and it is better for a fish as they don't cause as much flesh trauma , it is also better to be caught on a single hook rather than a trebble lol well theres a suprise.
Although it doesn't seem to address the topic of size of hook i personally believe that fish up to 25 lb shouldn't need a hook that will actually go all the way through the lip (when fishing for carp, cats or barbel) barbless hooks to size 10 i have found will wedge into the lip/jaw of the fish and not move about, but will be able to be removed with ease.
where as larger hooks that are barbless will act like cheese wire when they go through the lip moving in the wound and causing more tissue trauma.
Where as if you use a barbed hook you might stop the movement of the hook stopping the cheese wire effect but when removing said hook the tissue trauma will be as bad because of the wripping when pulling the barb through the tissue.
just my opinion best regards Malc.
Thanks for your time Jerome

[Keith]

Sept 8, 2011 14:40:37 GMT envagencyyorkshire said:

Hi,

I’ve uncovered quite a few research papers on this subject. I’ve not had time to do a comprehensive literature review for you, but I have found one review paper, published a few years ago that summarised research up to that time (2006).........

.......Factors such as handling time and method (e.g. unhooking in water or in air), hook number (e.g. trebles over singles), bait type and water temperature are also going to affect the chances of injuring a fish.

The New Zealand Journal of Veterinary Science published an article summarising worldwide research into the effects of recreational angling on fish in 2006. It said:

• Minimising the number of hooks on lures and baits, and using barbless hooks and circle hooks generally reduce rates of injury and the severity of tissue trauma.
• Capture time, handling time, and exposure to air play significant roles in the stress responses of fish and should be minimised by anglers.


[Davie, PS & Kopf R.K. (2006) Physiology, behaviour and welfare of fish during recreational fishing and after release. New Zealand Veterinary Journal 54(4): 161-172]

Jerome.

Thank you for references. It's a good summing up of the scientific findings.