Publication Date:
2024-06-27
Description:
The dataset represents the number, the total and the standardized biomass (catch per unit effort) of 94 deep-pelagic fish species collected by pelagic trawling in submarine canyons of the Bay of Biscay slope during the EVHOE scientific cruises on R/V Thalassa in autumn between 2002 and 2019 (https://doi.org/10.18142/8). Fifty-six trawls were conducted at night between 20 m and 2000 m depth. The trawl net was 192 m long with a headline of 76 m and a foot rope of 70 m. The average vertical mean mouth opening was about 24 m and the horizontal opening of about 58 m. The mesh size gradually decreases from very large 8 m meshes at the mouth to 20 mm meshes in the codend. To allow the capture of very small specimens, the trawl is also equipped with a 7.5 m long sock with a 12 mm mesh. The trawl had an average vertical mouth opening of 24 m and a horizontal opening of 58 m. The duration of the haul was 1 hour at 4 kn. The trawl did not have an opening-closing mechanism. Therefore, some individuals might have been caught during the descent and ascent of the gear, however a higher trawl speed on deployment and a low speed on retrieval were implemented to reduce bycatch at shallower depths than the target depth. The biomass per unit effort is standardized by the volume hauled and was calculated by multiplying the vertical and horizontal trawl opening and the distance trawled. Individuals were identified by expert ichthyologists to the species level whenever possible, otherwise they were identified to the genus or family level, especially when individuals were too small or damaged. Species or taxa were counted and most often weighed. When weighing was not possible, an estimate of the average weight of individuals over the whole time series was calculated and the total weight per species was estimated.
Keywords:
Anoplogaster cornuta; Anoplogaster cornuta, biomass, wet mass; Anoplogaster cornuta, mass; Arctozenus risso; Arctozenus risso, biomass, wet mass; Arctozenus risso, mass; Argyropelecus hemigymnus; Argyropelecus hemigymnus, biomass, wet mass; Argyropelecus hemigymnus, mass; Argyropelecus olfersii; Argyropelecus olfersii, biomass, wet mass; Argyropelecus olfersii, mass; Astronesthes niger; Astronesthes niger, biomass, wet mass; Astronesthes niger, mass; Avocettina infans; Avocettina infans, biomass, wet mass; Avocettina infans, mass; Barbantus curvifrons; Barbantus curvifrons, biomass, wet mass; Barbantus curvifrons, mass; Bathylagichthys greyae; Bathylagichthys greyae, biomass, wet mass; Bathylagichthys greyae, mass; Bathylagus euryops; Bathylagus euryops, biomass, wet mass; Bathylagus euryops, mass; Bathylagus spp.; Bathylagus spp., biomass, wet mass; Bathylagus spp., mass; Bay of Biscay; Benthosema glaciale; Benthosema glaciale, biomass, wet mass; Benthosema glaciale, mass; Beryx splendens; Beryx splendens, biomass, wet mass; Beryx splendens, mass; Bolinichthys indicus; Bolinichthys indicus, biomass, wet mass; Bolinichthys indicus, mass; Bolinichthys supralateralis; Bolinichthys supralateralis, biomass, wet mass; Bolinichthys supralateralis, mass; Borostomias antarcticus; Borostomias antarcticus, biomass, wet mass; Borostomias antarcticus, mass; Calculated; Ceratoscopelus maderensis; Ceratoscopelus maderensis, biomass, wet mass; Ceratoscopelus maderensis, mass; Chauliodus sloani; Chauliodus sloani, biomass, wet mass; Chauliodus sloani, mass; Counted; Cyclothone spp.; Cyclothone spp., biomass, wet mass; Cyclothone spp., mass; Date/Time of event; Date/Time of event 2; DEPTH, water; Derichthys serpentinus; Derichthys serpentinus, biomass, wet mass; Derichthys serpentinus, mass; Derichthys spp.; Derichthys spp., biomass, wet mass; Derichthys spp., mass; Diaphus dumerilii; Diaphus dumerilii, biomass, wet mass; Diaphus dumerilii, mass; Diaphus metopoclampus; Diaphus metopoclampus, biomass, wet mass; Diaphus metopoclampus, mass; Diaphus mollis; Diaphus mollis, biomass, wet mass; Diaphus mollis, mass; Diaphus spp.; Diaphus spp., biomass, wet mass; Diaphus spp., mass; Dolicholagus longirostris; Dolicholagus longirostris, biomass, wet mass; Dolicholagus longirostris, mass; Dolichopteryx longipes; Dolichopteryx longipes, biomass, wet mass; Dolichopteryx longipes, mass; Electrona risso; Electrona risso, biomass, wet mass; Electrona risso, mass; Entelurus aequoreus; Entelurus aequoreus, biomass, wet mass; Entelurus aequoreus, mass; Eurypharynx pelecanoides; Eurypharynx pelecanoides, biomass, wet mass; Eurypharynx pelecanoides, mass; Event label; Evermannella balbo; Evermannella balbo, biomass, wet mass; Evermannella balbo, mass; EVHOE-2002; EVHOE-2003; EVHOE-2007; EVHOE-2008; EVHOE-2010; EVHOE-2011; EVHOE-2016; EVHOE-2017; EVHOE-2018; EVHOE-2019; EVHOE-G0344; EVHOE-G0349; EVHOE-G0354; EVHOE-G0365; EVHOE-G0370; EVHOE-G0380; EVHOE-G0399; EVHOE-H0400; EVHOE-H0411; EVHOE-H0419; EVHOE-H0425; EVHOE-H0431; EVHOE-H0467; EVHOE-L0731; EVHOE-L0736; EVHOE-L0742; EVHOE-L0747; EVHOE-L0752; EVHOE-L0761; EVHOE-L0766; EVHOE-M0855; EVHOE-M0862; EVHOE-M0876; EVHOE-M0881; EVHOE-M0887; EVHOE-M0892; EVHOE-O0959; EVHOE-O0964; EVHOE-O0969; EVHOE-O0978; EVHOE-O0983; EVHOE-O0995; EVHOE-P1048; EVHOE-P1053; EVHOE-P1062; EVHOE-P1067; EVHOE-P1072; EVHOE-U0508; EVHOE-U0514; EVHOE-U0519; EVHOE-U0524; EVHOE-U0530; EVHOE-U0536; EVHOE-U0541; EVHOE-V0494; EVHOE-W0534; EVHOE-W0545; EVHOE-W0551; EVHOE-W0562; EVHOE-W0568; EVHOE-X0447; EVHOE-X0453; EVHOE-X0458; EVHOE-X0464; EVHOE-X0470; EVHOE-X0476; Gadiculus argenteus; Gadiculus argenteus, biomass, wet mass; Gadiculus argenteus, mass; Gonostoma elongatum; Gonostoma elongatum, biomass, wet mass; Gonostoma elongatum, mass; GOV36-47; Grande Ouverture Verticale 36/47; Holtbyrnia anomala; Holtbyrnia anomala, biomass, wet mass; Holtbyrnia anomala, mass; Holtbyrnia macrops; Holtbyrnia macrops, biomass, wet mass; Holtbyrnia macrops, mass; Howella atlantica; Howella atlantica, biomass, wet mass; Howella atlantica, mass; Lampadena atlantica; Lampadena atlantica, biomass, wet mass; Lampadena atlantica, mass; Lampadena speculigera; Lampadena speculigera, biomass, wet mass; Lampadena speculigera, mass; Lampadena urophaos; Lampadena urophaos, biomass, wet mass; Lampadena urophaos, mass; Lampanyctus crocodilus; Lampanyctus crocodilus, biomass, wet mass; Lampanyctus crocodilus, mass; Lampanyctus festivus; Lampanyctus festivus, biomass, wet mass; Lampanyctus festivus, mass; Lampanyctus macdonaldi; Lampanyctus macdonaldi, biomass, wet mass; Lampanyctus macdonaldi, mass; Lampanyctus spp.; Lampanyctus spp., biomass, wet mass; Lampanyctus spp., mass; Latitude of event; Latitude of event 2; Leptostomias gladiator; Leptostomias gladiator, biomass, wet mass; Leptostomias gladiator, mass; Lestidiops affinis; Lestidiops affinis, biomass, wet mass; Lestidiops affinis, mass; Lestidiops sphyrenoides; Lestidiops sphyrenoides, biomass, wet mass; Lestidiops sphyrenoides, mass; Lobianchia gemellarii; Lobianchia gemellarii, biomass, wet mass; Lobianchia gemellarii, mass; Longitude of event; Longitude of event 2; Lyconus brachycolus; Lyconus brachycolus, biomass, wet mass; Lyconus brachycolus, mass; Macroparalepis affinis; Macroparalepis affinis, biomass, wet mass; Macroparalepis affinis, mass; Magnisudis atlantica; Magnisudis atlantica, biomass, wet mass; Magnisudis atlantica, mass; Malacosteus niger; Malacosteus niger, biomass, wet mass; Malacosteus niger, mass; Maulisia argipalla; Maulisia argipalla, biomass, wet mass; Maulisia argipalla, mass; Maulisia mauli; Maulisia mauli, biomass, wet mass; Maulisia mauli, mass; Maulisia microlepis; Maulisia microlepis, biomass, wet mass; Maulisia microlepis, mass; Maurolicus muelleri; Maurolicus muelleri, biomass, wet mass; Maurolicus muelleri, mass; Melanolagus bericoides; Melanolagus bericoides, biomass, wet mass; Melanolagus bericoides, mass; Melanonus zugmayeri; Melanonus zugmayeri, biomass, wet mass; Melanonus zugmayeri, mass; Melanostigma atlanticum; Melanostigma atlanticum, biomass, wet mass; Melanostigma atlanticum, mass; Melanostomias bartonbeani; Melanostomias bartonbeani, biomass, wet mass; Melanostomias bartonbeani, mass; Mentodus rostratus; Mentodus rostratus, biomass, wet mass; Mentodus rostratus, mass; Myctophidae; Myctophidae, biomass, wet mass; Myctophidae, mass; Myctophum punctatum; Myctophum punctatum, biomass, wet mass; Myctophum punctatum, mass; Nannobrachium atrum; Nannobrachium atrum, biomass, wet mass; Nannobrachium atrum, mass; Nannobrachium spp.; Nannobrachium spp., biomass, wet mass; Nannobrachium spp., mass; Nansenia oblita; Nansenia oblita, biomass, wet mass; Nansenia oblita, mass; Nansenia spp.; Nansenia spp., biomass, wet mass; Nansenia spp., mass; Neonesthes capensis; Neonesthes capensis, biomass, wet mass; Neonesthes capensis, mass; Nessorhamphus ingolfianus; Nessorhamphus ingolfianus, biomass, wet mass; Nessorhamphus ingolfianus, mass; Normichthys operosus; Normichthys operosus, biomass, wet mass; Normichthys operosus, mass; Notoscopelus kroyeri; Notoscopelus kroyeri, biomass, wet mass; Notoscopelus kroyeri, mass; Oneirodes anisacanthus; Oneirodes anisacanthus, biomass, wet mass; Oneirodes anisacanthus, mass; Oneirodes carlsbergi; Oneirodes carlsbergi, biomass, wet mass; Oneirodes carlsbergi, mass; Parabrotulidae; Parabrotulidae, biomass, wet mass; Parabrotulidae, mass; Paralepis coregonoides; Paralepis coregonoides, biomass, wet mass; Paralepis coregonoides, mass; Photostomias guernei; Photostomias guernei, biomass, wet mass; Photostomias guernei, mass; Photostylus pycnopterus; Photostylus pycnopterus, biomass, wet mass; Photostylus pycnopterus, mass; Platytroctidae; Platytroctidae, biomass, wet mass; Platytroctidae, mass; Polymetme thaeocoryla; Polymetme thaeocoryla, biomass, wet mass; Polymetme thaeocoryla, mass; Poromitra megalops; Poromitra megalops, biomass, wet mass; Poromitra megalops, mass;
Type:
Dataset
Format:
text/tab-separated-values, 15822 data points
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