"Wayne Knight" schrieb im Newsbeitrag
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"Mike Connor" wrote in message
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Circle hooks were specifically devised for longline fishing, in order to
guarantee a mortality rate of 100%. They actually come close.
Perhaps you are thinking of something else? A quick google returned:
http://home.att.net/~sarasotadon/circle-hook.htm
http://www.ccact.org/circle_hooks.htm
http://www.dnr.state.md.us/fisheries...onal/crsb.html
http://www.floridamarine.org/feature...e.asp?id=20414
Nope, do a search on "Longline hooks", or "Circle Longline Hooks".
Apart from which, I used them for a while. For some fly-fishing. Practically
all the fish I caught ( predominantly cod) ,were hooked in the throat, and
impossible to release unharmed. The main reason for commercial fishermen
using the circle hooks was that the fish was less likely to bleed, and
consequently did not die on the line. A dead fish which may have been dead
for a while, is not worth as much as live fish which can be freshly killed.
These hooks were used on stationary unmanned lines. Quite a few studies
have shown that the mortality rate on the lines when using such hooks is
very low when compared to "J" hooks. This is true. The hook up and hold
rates are also much higher, which in a commercial fishery means more dead
fish. Many fish which would have escpaed from "J" hooks, are unable to
escape from circle hooks. Owing to the jaw, lip and scissor hooking, (
thought to be as high as 95% in many cases and species), the fish does not
bleed, and does not die quite so quickly on the unamnned line. Also, hook
removal is facilitated.
The properties are explained here quite well;
http://www.stripersurf.com/circlehooks.html
Some other interesting bits and pieces;
http://www.sarasota-fla-fishing.com/circle.html
For most active fly-fishing, these hooks are quite useless. They do not
depend on the skill of an angler to set the hook. They depend on the fish
moving away with the bait, and this usually causes a lip or scissor hook up.
Any action on the part of the angler, apart from slowly tightening the line
as the fish moves away will either cause the fish to eject the hook, or
result in a bad hookup, in the throat etc.
Some species of fish ( like Cod) tend to engulf their prey, and basically
suck it down into their gullets. When they move, they are hooked in the
gullet.
For stationary, or "dead drift" fishing with either flies or bait, these
hooks are incredibly efficient. This is however not really fly-fishing, it
is more like trap setting. Which is precisely what the hooks were designed
for.
Sport anglers using such hooks will most certainly cause less fish
mortality, for several reasons. If they move the hook, they either lose the
fish, or hook it badly. Usually they will just lose it, although this depnds
on the feeding habits of the species involved. If they donīt move the hook,
the fish hooks itself, and usually in the lip, jaw or scissors. This is
then easy to release undamaged.
Most types of fly-fishing depend on the angler applying motion to the fly.
This will not work with circle hooks. If the angler may not move the fly,
then about 90% of flyfishing is no longer flyfishing as such, but more or
less the same as bait fishing.
TL
MC