Assessing the risk of vulnerable species exposure to deepwater trawl fisheries: the case of orange roughy Hoplostethus atlanticus to the west of Ireland and Britain

Type Article
Date 2013-10
Language English
Author(s) Dransfeld Leonie1, Gerritsen Hans D.1, Hareide Nils R.2, Lorance PascalORCID3
Affiliation(s) 1 : Inst Marine, Oranmore, Galway, Ireland.
2 : Runde Environm Ctr, N-6096 Runde, Norway.
3 : IFREMER, F-44311 Nantes 03, France.
Source Aquatic Living Resources (0990-7440) (Edp Sciences S A), 2013-10 , Vol. 26 , N. 4 , P. 307-318
DOI 10.1051/alr/2013066
WOS© Times Cited 7
Keyword(s) Ecological risk assessment, VMS, Continental slope, Beryciformes, Atlantic Ocean
Abstract With slow growth rates, late maturity and a high maximum age of 100 years or more, orange roughy can be classified as a vulnerable deepwater fish species that can only sustain low rates of exploitation. Historical patterns of exploitation associated with this species suggest that it is currently not possible to manage its fisheries in the Northeast Atlantic sustainably, and the total allowable catch for orange roughy has been gradually reduced to zero for European fisheries since 2010. Orange roughy to the west of Ireland and Britain occurs on distinct bathymetric features (seamounts, hills and canyons) as well as on flat ground along the continental slope. Productivity-susceptibility analysis (PSA) was performed to evaluate the biological vulnerability of orange roughy in relation to other deepwater species and the risk that recent and current fisheries pose to its populations in the study area. Time-dependant PSA, based on the spatial overlap between orange roughy distribution and recent and current deepwater fisheries demonstrated a strong reduction in risk over time when fisheries stopped directed targeting practices and continued with mixed deepwater trawl fisheries. Some spatial overlap between the species and current fisheries remains, and while the method can show relative risk reduction, it cannot provide information on whether the risk is low enough to allow the recovery of depleted populations.
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Dransfeld Leonie, Gerritsen Hans D., Hareide Nils R., Lorance Pascal (2013). Assessing the risk of vulnerable species exposure to deepwater trawl fisheries: the case of orange roughy Hoplostethus atlanticus to the west of Ireland and Britain. Aquatic Living Resources, 26(4), 307-318. Publisher's official version : https://doi.org/10.1051/alr/2013066 , Open Access version : https://archimer.ifremer.fr/doc/00176/28758/