ICES Advice 2005, Volume 9 - Widely Distributed and Migratory Stocks

1 WIDELY DISTRIBUTED AND MIGRATORY STOCKS 1

1.1 Widely distributed marine populations 1

1.1.1 The North East Atlantic ecosystem in relation to widely distributed populations 1

1.2 The populations and their exploitation 2

1.2.1 The fisheries and their impact 2

1.2.1.1 Ecosystem impact of fisheries 3

1.3 Assessments and advice regarding fisheries 4

1.3.1 ICES advice for fisheries management 7

1.3.2 Special Requests 13

1.3.2.1 Restocking of European eel (DG FISH) 13

1.3.2.2 Stock assessment methods for Atlanto-Scandian herring and blue whiting stocks (NEAFC) 15

1.3.2.3 NEA mackerel stock assessment methodology (NEAFC and Fishing Industry) 17

1.4 Stock summaries Widely Distributed and Migratory Stocks

1.4.1 Hake Northern stock (Division IIIa, Subareas IV, VI, and VII, and Divisions VIIIa,b,d) 23

1.4.2 Mackerel (combined Southern, Western, and North Sea spawning components) 34

1.4.3 Western horse mackerel (Trachurus trachurus) (Divisions IIa, IVa, Vb, VIa, VIIa c, e k, VIIIa e) 45

1.4.4 Blue whiting combined stock (Subareas I IX, XII, and XIV) 55

1.4.5 Norwegian spring-spawning herring 68

1.4.6 Northeast Atlantic spurdog 76

1.4.7 Northeast Atlantic porbeagle 80

1.4.8 Northeast Atlantic basking shark 82

1.4.9 European eel