In Other Words is a new ICES blog devoted to clarifying some of the
important terms and phrases that are crucial to the work we carry out as
well as the wider world of marine science.
Each week we'll
feature a scientist or expert from one of our working groups, who will
explain a term relevant to their efforts In Other Words.
Kicking us off this week is Lotte Worsøe Clausen, Chair of WKherTAC – the Workshop to Evalaute the TAC Calculation for Herring in IIIa (an ICES sea area) and Management Plan for Herring in the North Sea. She describes what is meant by Total Allowable Catch - otherwise known as TAC.
'When we have a fish stock in an area being fished upon, we need to work out how many fish die and also how many babies are produced for the next year. All of that means we can calculate how many fish we can perform fishing on. From there we have a number of predictions, evaluating how many fish we can take out of the stock whilst it’s still able to reproduce itself. This number is the advised TAC.’
‘This number is then delivered to our clients as advice for negotiations, which means that the eventual TAC can end up differing from the advised TAC.’