Bottom trawl fishing is among the most destructive anthropogenic pressures acting on benthic ecosystems, but the full extent of the damage is undocumented because of the limited number of deep-sea observations of impacted regions (e.g., Brennan et al., 2012, 2016). As part of its continuing ocean exploration mission, in 2011, E/V Nautilus conducted a remotely operated vehicle (ROV) survey along a transect in a submarine canyon in the Mediterranean’s Alboran Sea off southern Spain at depths ranging from 1,200 m to <300 m (Coleman et al., 2012). This exploration along the South Alboran Ridge offered the opportunity to directly observe with video the bathymetric extent and intensity of recent trawling damage to the seafloor in this area. This dive revealed large furrows running in multiple directions caused by trawl doors scraping across the seabed. Little biological activity was evident in the depth ranges where these scars were observed. The destructive nature of bottom trawl fishing should be viewed with the same public affront as subaerial clear-cutting of forests and strip-mining. The only difference is that the ocean hides trawl damage from the public eye. The more we explore the deep sea, repeatedly map the seafloor with sonar, and observe the seabed and its ecosystems with video captured by ROVs, the greater we can understand the full impacts of trawling.

Brennan, M.L., M. Canals, D.F. Coleman, J.A. Austin Jr., and D. Amblas. 2015. Bathymetric extent of recent trawl damage to the seabed captured by an ROV transect in the Alboran Sea. Oceanography 28(4):8–10, https://doi.org/10.5670/oceanog.2015.87.

Brennan, M.L., R.D. Ballard, C. Roman, K.L.C. Bell, B. Buxton, D.F. Coleman, G. Inglis, O. Koyagasioglu, and T. Turanli. 2012. Evaluation of the modern submarine landscape off southwestern Turkey through the documentation of ancient shipwreck sites. Continental Shelf Research 43:55–70, https://doi.org/10.1016/j.csr.2012.04.017.
1. Brennan, M.L., D. Davis, R.D. Ballard, A.C. Trembanis, J.I. Vaughn, J.S. Krumholz, J.P. Delgado, C.N. Roman, C. Smart, K.L.C. Bell, and others. 2016. Quantification of bottom trawl damage to ancient shipwreck sites. Marine Geology 371:82–88, https://doi.org/10.1016/j.margeo.2015.11.001.
2. Brennan, M.L., D. Davis, C. Roman, I. Buynevich, A. Catsambis, M. Kofahl, D. Ürkmez, J.I. Vaughn, M. Merrigan, and M. Duman. 2013. Ocean dynamics and anthropogenic impacts along the southern Black Sea shelf examined by the preservation of pre-modern shipwrecks. Continental Shelf Research 53:89–101, https://doi.org/10.1016/​j.csr.2012.12.010.
3. Caddy, J.F. 1973. Underwater observations on tracks of dredges and trawls and some effects of dredging on scallop ground. Journal of the Fisheries Research Board of Canada 30:173–180, https://doi.org/10.1139/f73-032.
4. Coleman, D.F., J.A. Austin Jr., M. Canals, D. Amblas, J.B. Company, and M.L. Brennan. 2012. Nautilus explores the western Mediterranean Sea. Pp. 36–37 in New Frontiers in Ocean Exploration: The E/V Nautilus and NOAA Ship Okeanos Explorer 2011 Field Season. K.L.C. Bell, K. Elliott, C. Martinez, and S.A. Fuller, eds, Oceanography 25(1), supplement, https://doi.org/10.5670/oceanog.2011.supplement.01
5. Commission of the European Communities. 2004. European Union Mediterranean Fisheries and exploited resources. Report of the subgroup on the Mediterranean Sea and of the scientific, technical and economic committee for fisheries. https://stecf.jrc.ec.europa.eu/documents/43805/104879/2004-06_EU+Med+fisheries+and+exploited+resources_SEC(2004)-772.pdf.
6. DeAlteris, J., L. Skrobe, and C. Lipsky. 1999. The significance of seabed disturbance by mobile fishing gear relative to natural processes: A case study in Narragansett Bay, Rhode Island. American Fisheries Society Symposium 22:224–237.
7. De Juan, S., and M. Demestre. 2012. A trawl disturbance indicator to quantify large scale fishing impact on benthic ecosystems. Ecological Indicators 18:183–190, https://doi.org/10.1016/​j.ecolind.2011.11.020.
8. Demestre, M., A. Muntadas, S. de Juan, C. Mitilineou, P. Sartor, J. Mas, S. Kavadas, and J. Martín. 2015. The need for fine-scale assessment of trawl fishing effort to inform on an ecosystem approach to fisheries: Exploring three data sources in Mediterranean trawling grounds. Marine Policy 62:134–143, https://doi.org/10.1016/​j.marpol.2015.09.012.
9. García-Rodríguez, M. 2003. Characterization and standardization of a red shrimp, Aristeus antennatus (Risso, 1816), fishery off the Alicante gulf (SE Spain). Scientia Marina 67:63–74.
10. Ivanović, A., R.D. Neilson, and F.G. O’Neill. 2011. Modelling the physical impact of trawl components on the seabed and comparison with sea trials. Ocean Engineering 38:925–933, https://doi.org/10.1016/j.oceaneng.2010.09.011.
11. Jones, J.B. 1992. Environmental impact of trawling on the seabed: A review. New Zealand Journal of Marine and Freshwater Research 26:59–67, https://doi.org/10.1080/00288330.1992.9516500.
12. Lucchetti, A., and A. Sala. 2012. Impact and performance of Mediterranean fishing gear by side-scan sonar technology. Canadian Journal of Fisheries and Aquatic Science 69:1,806–1,816, https://doi.org/10.1139/f2012-107.
13. Martín, J., P. Puig, A. Palanques, and A. Giamportone. 2014a. Commercial bottom trawling as a driver of sediment dynamics and deep seascape evolution in the Anthropocene. Anthropocene 7:1–15, https://doi.org/10.1016/j.ancene.2015.01.002.
14. Martín, J., P. Puig, A. Palanques, and M. Ribó. 2014b. Trawling-induced daily sediment resuspension in the flank of a Mediterranean submarine canyon. Deep Sea Research Part II 104:174-183, https://doi.org/10.1016/j.dsr2.2013.05.036.
15. Norse, E.A., S. Brooke, W.W.L. Cheung, M.R. Clark, I. Ekeland, R. Froese, K.M. Gjerde, R.L. Haedrich, S.S. Heppell, T. Morato, and others. 2012. Sustainability of deep-sea fisheries. Marine Policy 36:307–320, https://doi.org/10.1016/​j.marpol.2011.06.008.
16. Palanques, A., P. Puig, J. Guillén, M. Demestre, and J. Martín. 2014. Effects of bottom trawling on the Ebro continental shelf sedimentary system (NW Mediterranean). Continental Shelf Research 72:83–98, https://doi.org/10.1016/​j.csr.2013.10.008.
17. Puig, P., M. Canals, J.B. Company, J. Martín, D. Amblas, G. Lastras, A. Palanques, and A.M. Calafat. 2012. Ploughing the deep sea floor. Nature 489:286–289, https://doi.org/10.1038/nature11410.
18. Schrope, M. 2008. Fishing trawlers have double the reach. Nature News, https://doi.org/10.1038/news.2008.658.
19. Watling, L., and E.A. Norse. 1998. Disturbance of the seabed by mobile fishing gear: A comparison to forest clearcutting. Conservation Biology 12:1,180–1,197, https://doi.org/​10.1046/j.1523-1739.1998.0120061180.x.

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