Bat rays are often caught in trawling and gill nets as unwanted by-catch .
The advice will cover not just fisheries that target cod in these areas, but also fisheries that catch cod as a by-catch .
We also know that many species are caught in phenomenally large numbers by fishing them, typically as by-catch from longline fishing worldwide, but also from trawls and gill net, than any other kinds of fishery.
With modern fishing we can accept a cod by-catch of, say 2%, in other fisheries whilst stopping fishing for cod as a main catch for a few years.
And as the green lobbyists go on to complain, this is a system based on measuring what is landed on the quay, not on the by-catch which is thrown back into the sea for being under-sized or over-quota.
Ices yesterday called for a ban on cod fishing in the North Sea, the Irish Sea and off the west coast of Scotland - and for a moratorium on fishing in areas where the species is caught as a by-catch - to rebuild fish stocks.
The commission argues that the fishery must be restricted since cod, in desperately dire straits, is caught as a so-called by-catch of the prawn fishery.
To use a commercial fishing term, recreational fishermen now find themselves the by-catch in this argument.
This was due to the now scientifically proved belief that substantial amounts of cod were a by-catch of prawns.
And because cod are a by-catch of haddock, whiting and prawn, other key fisheries should be closed too.