Good Fish Guide
Method of production - Caught at sea
Capture method - Deep sea trawl
Capture area - North East Atlantic (FAO 27)
Stock area - All Areas
Stock detail - All Areas
Fish type - White round fish
Roundnose grenadier is slow growing, late to mature, long lived and has low reproductive capacity. They can therefore only sustain low levels of exploitation. They also exhibit aggreating behaviour which makes them vulnerable to exploitation. It is a deep-water species targeted by fisheries that are poorly regulated. It also occupies a habitat that is vulnerable to the impacts of trawling. Avoid eating.
Roundnose grenadier occurs in all types of deep-sea habitats at depths of 800 to 1800 m in the Northeast Atlantic and is found along the continental slope, on Rockall and Hatton banks, and on the Mid-Atlantic Ridge. It occurs in shallower areas in the Skagerrak. In all areas the species has a slow growth and reaches high ages (>50 years). Along the continental slope, roundnose grenadier occurs mainly close to the seafloor; however, it forms more pelagic aggregation on the Mid-Atlantic Ridge where it is exploited with pelagic trawls. Roundnose grenadier matures at an age of 11 years (8 to 14 years according to certain studies) and the life cycle varies amongst populations, with spawning occurring throughout the year to the west of the British Isles and only in October and November.
Roundnose grenadier is slow growing, late to mature, long lived and has low reproductive capacity. They can therefore only sustain low levels of exploitation. Stock status in these areas is unknown or there is insufficient information to determine reference points. Fisheries for this species should be accompanied by data collection programmes on target and bycatch fisheries, and scientific advice is that the fisheries should not be allowed to expand, unless they can be shown to be sustainable.
There are no specific objectives for the management of this stock. It is considered incredibly difficult to manage a fishery for deepwater species sustainably; with the current poor data on the vast majority of deepsea fisheries, and poor understanding of the effects on the deepsea ecosystem and seabed, present knowledge is inadequate to provide sustainable advice. Due to the international nature of many of the deep sea fisheries on the high seas, compliance with any regulations can be low, and due to the difficulties in enforcement on the high seas, there can be huge problems with Illegal, Unregulated and Unreported catches.
There are generally no directed fisheries for this species in these areas. It is taken as bottom trawl bycatch and in small amounts. Deep sea ecosystems are highly vulnerable and have a very low resilience, thus the impacts of any large scale removal of fish or abrasion of the seabed caused by fishing gear are likely to be severely detrimental with recovery slow, especially with regard to coldwater corals. Many deepsea fisheries are experimental and are targeted with heavy bottom trawling gear, which can decimate seamounts and ocean ridge ecosystems. As this fishery is part of a mixed fisheries, effort on roundnose grenadier also impacts other commercial and non-commercial deep-water species.
Based on method of production, fish type, and consumer rating: only fish rated 2 and below are included as an alternative in the list below . Click on a name to show the sustainable options available.
ICES Advice 2015, Book 9 http://www.ices.dk/sites/pub/Publication%20Reports/Advice/2015/2015/rng-oth.pdf;
ICES Advice 2016, Book 9 http://www.ices.dk/sites/pub/Publication%20Reports/Advice/2016/2016/rng-5b67.pdf
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