Optimization of purse seines by large meshed sections and low lead weight. Theoretical considerations, sinking speed measurements and fishing trials.
Original version
This report is not to be cited without prior reference to the authorsAbstract
Theoretical considerations on material requirements and
sinking speed by use of different mesh size and lead weight
in purse seines are outlined. Measurements confirmed that the
sinking speed varied with mesh size and lead weight according
to hydrodynamic theory. The sinking speed was slightly
influenced by mesh geometry. In fishing trials with white
large meshed net in the last part of a purse seine it was
never observed that herring or mackerel escaped through the
large meshes neither in day nor at night. The results
indicates that the construction of herring and mackerel purse
seines may be improved with an economic benefit both with
regard to building costs and catch success.