Management AdviceManagement considerations
This section deals with a species distributed over a wide area which may be composed of several populations. Age analyses suggest that roundnose grenadier may have a longevity of around 70 years and a slow growth.
The scientific basis for stock identification is uncertain. The Wyville-Thomson Ridge and fjord sills, between Western Scotland and the edge of the North Sea slope, could be natural physical boundaries. It is therefore considered that the northern North Sea and the Norwegian Deep could represent a separate management unit (IIIa and IVa). The roundnose grenadier on the Mid-Atlantic Ridge and the Hatton Bank are separated by a major oceanic basin and may constitute separate management units. This would indicate that the management units could be split as:
- Division (IIIa)
- Subareas VI, VII, and Divisions Vb, XIIb
- Mid-Atlantic ridge (Xb, XIIc, Va1, XIIa1, XIVb1)
- All other areas. (I, II, IV, Va2 VIII, IX XIVa XIVb2)
Trends in landings for all areas are shown in Figure 18.104.22.168 and Table 22.214.171.124.