A fisheries worker said: "He was tying the
cod end rope that holds the net closed and the black ring sea snake was in there.
Size selectivity for four fish species of the deep groundfish assemblage off the Portuguese southwest coast: evidence of mesh size, mesh configuration and cod end catch effects.
Size selectivity of diamond and square mesh cod ends for four by-catch species in the crustacean fishery off the Portuguese south coast.
Meanwhile, to enhance selectivity in bottom trawls, GFCM members will use voluntarily the 40mm square mesh in the
cod end of nets.
"Scottish fishermen have embraced technical measures such as using larger mesh nets, so that younger immature fish can escape from the
cod end of the catch.
At the opposite end, a rope was sewn to the
cod end mesh to support the throat to make a more durable and accessible catch chamber and to create a closing mechanism to seal the
cod end (Fig.
Measures on increasing minimum mesh sizes and using a 'selectivity window' aim to respond to this situation.Trawls and Danish seines with mesh sizes equal to or larger than 105mm will continue to be allowed, provided that a window made of square meshes with a minimum opening of 120 mm is inserted into the top panel of the
cod end. The netting of the selectivity window has to be knotless and single twine or with similar properties.
Webbing is attached to the frame and tapers back to a
cod end. The net can be fished from a stationary platform or a pair of nets can be attached to either side of a vessel.
But fishing leaders argue that few
cod end up in the larger mesh nets used to catch haddock.