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Longline terminal gear
identification guide
by S. Beverly
This guide will help
observers, researchers, and captains of longline boats to correctly identify
hooks, swivels, trace lines, and baits used in pelagic longline fishing. It is
important that longline terminal gear is correctly identifi ed as it has an
effect, not only on target species catch rates, but on catch rates and
post-release survival of bycatch species including marine turtles. The guide is
divided into four sections: hooks used in longline fi shing, swivels, trace
lines, and baits (including lightsticks). Of these, the most important are
longline hooks, as past and current research is showing that the use of large
circle hooks reduces the catch rate of some bycatch species while improving (or
not affecting) the catch of target species.
Circle hooks also
improve the chances of post-capture survival of released bycatch species.
Standardization of hook types and sizes is therefore very important for data
recording and analysis for observer logsheets, wheelhouse logsheets, and for
scientifi c studies on the effects of terminal gear on catch rates and
post-capture survival.
 Complete version in
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