Dataset: Trawl abundance
Deployment: OC1707A

Epibenthic trawl abundance from offshore of Aleutian Islands, 2016-2017

View Data: For data, See Dataset Metadata Page: https://www.bco-dmo.org/dataset/729630

Principal Investigator:

Matthew Edwards (San Diego State University, SDSU)

Co-Principal Investigator:

Brenda Konar (University of Alaska Fairbanks, UAF)

Contact:

Aaron S. Bland (University of Alaska Fairbanks, UAF)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: Changes in ecosystem production and benthic biodiversity following the widespread loss of an ecosystem engineer (Kelp Forest Ecosystem Engineer Loss)

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Description

This dataset includes epibenthic community abundance collected offshore by trawls and reported as numbers per 100 square meters.

Methods & Sampling

Dataset acquisition description

Sampling locations were from the Aleutian Archipelago offshore between longitude 173.9 and -167.6 in June 2016 and July 2017.

Trawls were conducted with a 3.05 m plumb-staff beam trawl with a 7-mm mesh and a 4-mm codend liner (Gunderson & Ellis, 1986). For each trawl, the trawl net was towed for approximately 3 minutes on the seafloor with the vessel traveling at 1.5 knots. A temperature-depth recorder was attached to the trawl net to determine effective trawling distances. The start of each trawl was determined by the time at which the trawl net stopped descending in the depth profile, and the end of each trawl was determined by the time the trawl net began ascending. Trawl distances were determined by referencing the GPS coordinates of the research vessel for the start and end times of each trawl event. Occasionally, the trawl net became damaged by rocks during a trawl event, preventing effective sampling after the collision. For these trawls, the collision point was detectable by a sudden decrease in depth of the trawl net, and the effective trawling swath was assumed to be from the beginning of the trawl up to the collision point.

Organisms were sorted and identified to the lowest taxonomic level feasible. Members of each taxonomic group were counted and their damp-biomass (including shells for mollusks and crabs) was determined. Voucher specimens were prepared in 10% buffered formalin for those taxa that could not be identified in the field.

Some large samples were split in half. This is Indicated as the subsaample_factor. A value of 2 (trawl 24) indicates that half of the trawl contents were taken for biomass and count measurements. The biomass and count values in the area-standardized data sheets are estimated by doubling the values recorded for the subsampled portion.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- corrected spelling of 4 taxa to agree with World Register of Marine Species names. See Parameter list below for submitted names, in parentheses.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1435194	NSF Division of Ocean Sciences
OCE-1435205	NSF Division of Ocean Sciences

Instruments

Beam Trawl

Supplied Name:

Supplied Description:

A 3.05 m plumb-staff beam trawl with a 7-mm mesh and a 4-mm codend liner

Instrument Type

Generic Name: Beam Trawl

Acronym: Beam trawl

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/24/

Generic Description:

A beam trawl consists of a cone-shaped body ending in a bag or codend, which retains the catch. In these trawls the horizontal opening of the net is provided by a beam, made of wood or metal, which is up to 12 m long. The vertical opening is provided by two hoop-like trawl shoes mostly made from steel. No hydrodynamic forces are needed to keep a beam trawl open. The beam trawl is normally towed on outriggers, one trawl on each side.

While fishing for flatfish the beam trawl is often equipped with tickler chains to disturb the fish from the seabed. For operations on very rough fishing grounds they can be equipped with chain matrices. Chain matrices are rigged between the beam and the groundrope and prevent boulders/stones from being caught by the trawl. Shrimp beam trawls are not so heavy and have smaller mesh sizes. A bobbin of groundrope with rubber bobbins keeps the shrimp beam trawl in contact with the bottom and gives flatfish the opportunity to escape.

Close bottom contact is necessary for successful operation. To avoid bycatch of most juvenile fishes selectivity devices are assembled (sieve nets, sorting grids, escape holes). While targeting flatfish the beam trawls are towed up to seven knots, therefore the gear is very heavy; the largest gears weighs up to 10 ton. The towing speed for shrimp is between 2.5 and 3 knots.

(from: http://www.fao.org/fishery/geartype/305/en)

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Island	sampled Island location	unitless	site
Region	A priori region designation: central; east; west; far-west	unitless	region
Trawl_Distance_m	Effective trawling distance based on estimates of trawling start/end locations	meters	no_bcodmo_term
Trawl_Area	Effective trawling area; trawl distance multiplied by the trawling width of the net (2.26 m)	meters^2	surface_area
Subsample_Factor	Subsample indicator. Value of 2 indicates that half of the trawl contents were taken for biomass and count measurements.	unitless	samp_fraction_denom
Start_Latitude	Estimated location of the research vessel when the trawl net reached the bottom	decimal degrees	lat
Start_Longitude	Estimated location of the research vessel when the trawl net reached the bottom	decimal degrees	lon
End_Latitude	Estimated location of the research vessel when the trawl net reached the bottom OR the net collided with a rock (ending effective trawling)	decimal degrees	lat
End_Longitude	Estimated location of the research vessel when the trawl net reached the bottom OR the net collided with a rock (ending effective trawling)	decimal degrees	lon
Start_Date_UTM	Starting time for each trawl event; UTC	unitless	date
Sample	sample identifier	unitless	sample
Acmaea_mitra	abundance of Acmaea mitra	individuals per 100m^2	abundance
Actinaria_sp_1	abundance of Actinaria sp. 1	individuals per 100m^2	abundance
Actinaria_sp_3	abundance of Actinaria sp. 3	individuals per 100m^2	abundance
Agonidae	abundance of Agonidae	individuals per 100m^2	abundance
Agonidae_juvenile	abundance of Agonidae; juvenile	individuals per 100m^2	abundance
Ammodytes_hexapterus	abundance of Ammodytes hexapterus	individuals per 100m^2	abundance
Ammodytidae_sp	abundance of Ammodytidae sp.	individuals per 100m^2	abundance
Ampelisca_sp	abundance of Ampelisca sp.	individuals per 100m^2	abundance
Amphiophiura_sp	abundance of Amphiophiura sp.	individuals per 100m^2	abundance
Amphipoda	abundance of Amphipoda	individuals per 100m^2	abundance
Amphiura_spp	abundance of Amphiura spp.	individuals per 100m^2	abundance
Anonyx_spp	abundance of Anonyx spp.	individuals per 100m^2	abundance
Anoplarchus_insignis	abundance of Anoplarchus insignis	individuals per 100m^2	abundance
Aptocyclus_ventricosus	abundance of Aptocyclus ventricosus	individuals per 100m^2	abundance
Arctonoe_vittata	abundance of Arctonoe vittata	individuals per 100m^2	abundance
Argis_sp	abundance of Argis sp.	individuals per 100m^2	abundance
Artedius_lateralis	abundance of Artedius lateralis	individuals per 100m^2	abundance
Aspidophoroides_monopterygius	abundance of Aspidophoroides monopterygius	individuals per 100m^2	abundance
Asteroidea_no_ID	abundance of Asteroidea; un-ID	individuals per 100m^2	abundance
Atheresthes_spp	abundance of Atheresthes spp.	individuals per 100m^2	abundance
Axinella_blanca	abundance of Axinella blanca	individuals per 100m^2	abundance
Bathyagonus_alascanus	abundance of Bathyagonus alascanus	individuals per 100m^2	abundance
Bathyagonus_nigripinnis	abundance of Bathyagonus nigripinnis	individuals per 100m^2	abundance
Bathymaster_signatus	abundance of Bathymaster signatus	individuals per 100m^2	abundance
Bathypolypus_spp	abundance of Bathypolypus spp.	individuals per 100m^2	abundance
Bathyraja_parmifera	abundance of Bathyraja parmifera	individuals per 100m^2	abundance
Blepsias_bilobus	abundance of Blepsias bilobus	individuals per 100m^2	abundance
Boltenia_ovifera	abundance of Boltenia ovifera	individuals per 100m^2	abundance
Boreotrophon_spp	abundance of Boreotrophon spp.	individuals per 100m^2	abundance
Brachiopoda	abundance of Brachiopoda	individuals per 100m^2	abundance
Brachyura_no_ID	abundance of Brachyura; un-ID	individuals per 100m^2	abundance
Buccinidae	abundance of Buccinidae	individuals per 100m^2	abundance
Ceramaster_arcticus	abundance of Ceramaster arcticus	individuals per 100m^2	abundance
Ceramaster_patagonicus	abundance of Ceramaster patagonicus	individuals per 100m^2	abundance
Cheiraster_Luidiaster_dawsoni	abundance of Cheiraster (Luidiaster) dawsoni	individuals per 100m^2	abundance
Chionoecetes_bairdi	abundance of Chionoecetes bairdi	individuals per 100m^2	abundance
Chionoecetes_opilio	abundance of Chionoecetes opilio	individuals per 100m^2	abundance
Chirona_evermanni	abundance of Chirona evermanni	individuals per 100m^2	abundance
Chiton_no_ID	abundance of Chiton; un-ID	individuals per 100m^2	abundance
Chlamys_rubida	abundance of Chlamys rubida	individuals per 100m^2	abundance
Chrysaora_melanaster	abundance of Chrysaora melanaster	individuals per 100m^2	abundance
Ciliatocardium_ciliatum	abundance of Ciliatocardium ciliatum	individuals per 100m^2	abundance
Clinocottus_sp	abundance of Clinocottus sp.	individuals per 100m^2	abundance
Colus_sp	abundance of Colus sp.	individuals per 100m^2	abundance
Cottoidea_juvenile	abundance of Cottoidea; juvenile	individuals per 100m^2	abundance
Crangonidae	abundance of Crangonidae	individuals per 100m^2	abundance
Cranopsis_sp	abundance of Cranopsis sp.	individuals per 100m^2	abundance
Crepidula_sp	abundance of Crepidula sp.	individuals per 100m^2	abundance
Crossaster_papposus	abundance of Crossaster papposus	individuals per 100m^2	abundance
Cryptacanthodes_aleutensis	abundance of Cryptacanthodes aleutensis	individuals per 100m^2	abundance
Cryptonatica_spp	abundance of Cryptonatica spp.	individuals per 100m^2	abundance
Crystallichthys_cyclospilus	abundance of Crystallichthys cyclospilus	individuals per 100m^2	abundance
Ctenodiscus_sp	abundance of Ctenodiscus sp.	individuals per 100m^2	abundance
Cucumaria_fallax	abundance of Cucumaria fallax	individuals per 100m^2	abundance
Cucumaria_sp	abundance of Cucumaria sp.	individuals per 100m^2	abundance
Cup_coral_unid	abundance of Cup coral unid.	individuals per 100m^2	abundance
Dendraster_sp	abundance of Dendraster sp.	individuals per 100m^2	abundance
Dendronotus_sp	abundance of Dendronotus sp.	individuals per 100m^2	abundance
Diaulula_sandiegensis	abundance of Diaulula sandiegensis	individuals per 100m^2	abundance
Diaulula_sp	abundance of Diaulula sp.	individuals per 100m^2	abundance
Diplopteraster_multipes	abundance of Diplopteraster multipes	individuals per 100m^2	abundance
Doridoidea	abundance of Doridoidea	individuals per 100m^2	abundance
Doris_odhneri	abundance of Doris odhneri	individuals per 100m^2	abundance
Doris_sp	abundance of Doris sp.	individuals per 100m^2	abundance
Echinarachnius_parma	abundance of Echinarachnius parma	individuals per 100m^2	abundance
Elassochirus_spp	abundance of Elassochirus spp.	individuals per 100m^2	abundance
Erimacrus_isenbeckii	abundance of Erimacrus isenbeckii	individuals per 100m^2	abundance
Eumicrotremus_orbis	abundance of Eumicrotremus orbis	individuals per 100m^2	abundance
Eupentacta_sp	abundance of Eupentacta sp.	individuals per 100m^2	abundance
Fish_larvae_no_ID	abundance of Fish larvae; un-ID	individuals per 100m^2	abundance
Flabellina_spp	abundance of Flabellina spp.	individuals per 100m^2	abundance
Flatfish_juvenile	abundance of Flatfish; juvenile	individuals per 100m^2	abundance
Flatfish_no_ID	abundance of Flatfish; un-ID	individuals per 100m^2	abundance
Fusitriton_oregonensis	abundance of Fusitriton oregonensis	individuals per 100m^2	abundance
Gadus_chalcogrammus	abundance of Gadus chalcogrammus	individuals per 100m^2	abundance
Gastropoda_sp_1	abundance of Gastropoda sp. 1	individuals per 100m^2	abundance
Glebocarcinus_oregonensis	abundance of Glebocarcinus oregonensis	individuals per 100m^2	abundance
Glebocarcinus_sp	abundance of Glebocarcinus sp.	individuals per 100m^2	abundance
Gobiesocidae	abundance of Gobiesocidae	individuals per 100m^2	abundance
Gorgonocephalus_eucnemis	abundance of Gorgonocephalus eucnemis	individuals per 100m^2	abundance
Gymnocanthus_galeatus	abundance of Gymnocanthus galeatus	individuals per 100m^2	abundance
Gymnocanthus_tricuspis	abundance of Gymnocanthus tricuspis	individuals per 100m^2	abundance
Halocynthia_aurantium	abundance of Halocynthia aurantium	individuals per 100m^2	abundance
Hemilepidotus_hemilepidotus	abundance of Hemilepidotus hemilepidotus	individuals per 100m^2	abundance
Hemilepidotus_jordani	abundance of Hemilepidotus jordani	individuals per 100m^2	abundance
Hemilepidotus_spinosus	abundance of Hemilepidotus spinosus	individuals per 100m^2	abundance
Hemithiris_psittacea	abundance of Hemithiris psittacea	individuals per 100m^2	abundance
Hemitripterus_bolini	abundance of Hemitripterus bolini	individuals per 100m^2	abundance
Henricia_leviuscula_complex	abundance of Henricia leviuscula (complex)	individuals per 100m^2	abundance
Henricia_sp_1	abundance of Henricia sp. 1	individuals per 100m^2	abundance
Henricia_sp_2	abundance of Henricia sp. 2	individuals per 100m^2	abundance
Hermissenda_sp	abundance of Hermissenda sp.	individuals per 100m^2	abundance
Hiatella_arctica	abundance of Hiatella arctica	individuals per 100m^2	abundance
Hippasteria_phrygiana	abundance of Hippasteria phrygiana	individuals per 100m^2	abundance
Hippoglossoides_dubius	abundance of Hippoglossoides dubius	individuals per 100m^2	abundance
Hippoglossoides_elassodon	abundance of Hippoglossoides elassodon	individuals per 100m^2	abundance
Hippoglossus_stenolepis	abundance of Hippoglossus stenolepis	individuals per 100m^2	abundance
Hippolytidae	abundance of Hippolytidae	individuals per 100m^2	abundance
Horned_sculpin_maybe	abundance of Horned sculpin (?)	individuals per 100m^2	abundance
Hyas_spp	abundance of Hyas spp.	individuals per 100m^2	abundance
Hypsagonus_quadricornis	abundance of Hypsagonus quadricornis	individuals per 100m^2	abundance
Icelinus_borealis	abundance of Icelinus borealis	individuals per 100m^2	abundance
Isopoda	abundance of Isopoda	individuals per 100m^2	abundance
Kallymeniopsis_sp_drift	abundance of Kallymeniopsis sp.; drift	individuals per 100m^2	abundance
Labidochirus_sp	abundance of Labidochirus sp.	individuals per 100m^2	abundance
Labidochirus_splendescens	abundance of Labidochirus splendescens	individuals per 100m^2	abundance
Lacuna_sp	abundance of Lacuna sp.	individuals per 100m^2	abundance
Lamellaria_sp	abundance of Lamellaria sp.	individuals per 100m^2	abundance
Laminaria_longipes_drift	abundance of Laminaria longipes; drift	individuals per 100m^2	abundance
Leodice_valens	abundance of Leodice valens	individuals per 100m^2	abundance
Lepeta_sp	abundance of Lepeta sp.	individuals per 100m^2	abundance
Lepidopsetta_bilineata	abundance of Lepidopsetta bilineata	individuals per 100m^2	abundance
Leptasterias_Hexasterias_alaskensis	abundance of Leptasterias (Hexasterias) alaskensis	individuals per 100m^2	abundance
Leptasterias_Hexasterias_coei_truculenta	abundance of Leptasterias (Hexasterias) coei truculenta	individuals per 100m^2	abundance
Leptasterias_arctica	abundance of Leptasterias arctica	individuals per 100m^2	abundance
Leptasterias_hylodes	abundance of Leptasterias hylodes	individuals per 100m^2	abundance
Leptasterias_nitida	abundance of Leptasterias nitida	individuals per 100m^2	abundance
Leptasterias_spp	abundance of Leptasterias spp.	individuals per 100m^2	abundance
Leptocottus_armatus	abundance of Leptocottus armatus	individuals per 100m^2	abundance
Leptychaster_anomalus	abundance of Leptychaster anomalus	individuals per 100m^2	abundance
Leptychaster_arcticus	abundance of Leptychaster arcticus	individuals per 100m^2	abundance
Leptychaster_pacificus	abundance of Leptychaster pacificus	individuals per 100m^2	abundance
Lethasterias_nanimensis	abundance of Lethasterias nanimensis	individuals per 100m^2	abundance
Limneria_prolongata	abundance of Limneria prolongata	individuals per 100m^2	abundance
Liparidae	abundance of Liparidae	individuals per 100m^2	abundance
Liparis_cyclopus	abundance of Liparis cyclopus	individuals per 100m^2	abundance
Liparis_sp	abundance of Liparis sp.	individuals per 100m^2	abundance
Lumpenus_sagitta	abundance of Lumpenus sagitta	individuals per 100m^2	abundance
Lycodes_brevipes	abundance of Lycodes brevipes	individuals per 100m^2	abundance
Malacocottus_zonurus	abundance of Malacocottus zonurus	individuals per 100m^2	abundance
Maxillopoda	abundance of Maxillopoda	individuals per 100m^2	abundance
Metridium_spp	abundance of Metridium spp.	individuals per 100m^2	abundance
Modiolus_modiolus	abundance of Modiolus modiolus	individuals per 100m^2	abundance
Molgula_sp	abundance of Molgula sp.	individuals per 100m^2	abundance
Musculus_discors	abundance of Musculus discors	individuals per 100m^2	abundance
Musculus_sp	abundance of Musculus sp.	individuals per 100m^2	abundance
Myoxocephalus_polyacanthocephalus	abundance of Myoxocephalus polyacanthocephalus	individuals per 100m^2	abundance
Myoxocephalus_scorpius	abundance of Myoxocephalus scorpius	individuals per 100m^2	abundance
Naticidae	abundance of Naticidae	individuals per 100m^2	abundance
Nemertea	abundance of Nemertea	individuals per 100m^2	abundance
Neoptilota_sp_drift	abundance of Neoptilota sp.; drift	individuals per 100m^2	abundance
Neptunea_sp	abundance of Neptunea sp.	individuals per 100m^2	abundance
Nereididae	abundance of Nereididae	individuals per 100m^2	abundance
Octopoda_juvenile	abundance of Octopoda; juvenile	individuals per 100m^2	abundance
Odontohenricia_ahearnae	abundance of Odontohenricia ahearnae	individuals per 100m^2	abundance
Odontohenricia_fisheri	abundance of Odontohenricia fisheri	individuals per 100m^2	abundance
Odontohenricia_sp	abundance of Odontohenricia sp.	individuals per 100m^2	abundance
Oenopota_sp	abundance of Oenopota sp.	individuals per 100m^2	abundance
Ophiolimna_sp	abundance of Ophiolimna sp.	individuals per 100m^2	abundance
Ophiopholis_aculeata	abundance of Ophiopholis aculeata	individuals per 100m^2	abundance
Ophiura_sarsii	abundance of Ophiura sarsii	individuals per 100m^2	abundance
Oregonia_gracilis	abundance of Oregonia gracilis	individuals per 100m^2	abundance
Orthasterias_koehleri	abundance of Orthasterias koehleri	individuals per 100m^2	abundance
Pagurus_spp	abundance of Pagurus spp.	individuals per 100m^2	abundance
Pandora_glacialis	abundance of Pandora glacialis	individuals per 100m^2	abundance
Pandora_wardiana	abundance of Pandora wardiana	individuals per 100m^2	abundance
Patinopecten_caurinus	abundance of Patinopecten caurinus	individuals per 100m^2	abundance
Pedicellaster_magister	abundance of Pedicellaster magister	individuals per 100m^2	abundance
Peltodoris_nobilis	abundance of Peltodoris nobilis	individuals per 100m^2	abundance
Peribolaster_biserialis	abundance of Peribolaster biserialis	individuals per 100m^2	abundance
Pleurogrammus_monopterygius	abundance of Pleurogrammus monopterygius	individuals per 100m^2	abundance
Plicifusus_sp	abundance of Plicifusus sp.	individuals per 100m^2	abundance
Pododesmus_macrochisma	abundance of Pododesmus macrochisma	individuals per 100m^2	abundance
Podothecus_accipenserinus	abundance of Podothecus accipenserinus	individuals per 100m^2	abundance
Polychaeta	abundance of Polychaeta	individuals per 100m^2	abundance
Polynoidae	abundance of Polynoidae	individuals per 100m^2	abundance
Poroclinus_rothrocki	abundance of Poroclinus rothrocki	individuals per 100m^2	abundance
Psychrolutes_paradoxus	abundance of Psychrolutes paradoxus	individuals per 100m^2	abundance
Pteraster_marsippus	abundance of Pteraster marsippus	individuals per 100m^2	abundance
Pteraster_militaris	abundance of Pteraster militaris	individuals per 100m^2	abundance
Pteraster_sp	abundance of Pteraster sp.	individuals per 100m^2	abundance
Pteraster_tesselatus	abundance of Pteraster tesselatus	individuals per 100m^2	abundance
Ptilosarcus_gurneyi	abundance of Ptilosarcus gurneyi	individuals per 100m^2	abundance
Pugettia_gracilis	abundance of Pugettia gracilis	individuals per 100m^2	abundance
Pycnogonida	abundance of Pycnogonida	individuals per 100m^2	abundance
Pycnopodia_helianthoides	abundance of Pycnopodia helianthoides	individuals per 100m^2	abundance
Rhamphostomella_costata	abundance of Rhamphostomella costata	individuals per 100m^2	abundance
Rocinela_angustata	abundance of Rocinela angustata	individuals per 100m^2	abundance
Ronquil_no_ID	abundance of Ronquil; un-ID	individuals per 100m^2	abundance
Ronquilus_jordani	abundance of Ronquilus jordani	individuals per 100m^2	abundance
Rossia_pacifica	abundance of Rossia pacifica	individuals per 100m^2	abundance
Sabellidae	abundance of Sabellidae	individuals per 100m^2	abundance
Saccharina_sp_drift	abundance of Saccharina sp.; drift	individuals per 100m^2	abundance
Sarritor_frenatus	abundance of Sarritor frenatus	individuals per 100m^2	abundance
Sculpin_no_ID	abundance of Sculpin; un-ID	individuals per 100m^2	abundance
Sebastes_alutus	abundance of Sebastes alutus	individuals per 100m^2	abundance
Sebastes_ciliatus	abundance of Sebastes ciliatus	individuals per 100m^2	abundance
Sergeant_poacher	abundance of Sergeant poacher	individuals per 100m^2	abundance
Serripes_groenlandicus	abundance of Serripes groenlandicus	individuals per 100m^2	abundance
Similipecten_greenlandicus	abundance of Similipecten greenlandicus	individuals per 100m^2	abundance
Sipuncula_sp_1	abundance of Sipuncula sp. 1	individuals per 100m^2	abundance
Sipuncula_sp_2	abundance of Sipuncula sp. 2	individuals per 100m^2	abundance
Solariella_spp	abundance of Solariella spp.	individuals per 100m^2	abundance
Solaster_spp	abundance of Solaster spp.	individuals per 100m^2	abundance
Stegocephalus_sp	abundance of Stegocephalus sp.	individuals per 100m^2	abundance
Stomphia_sp	abundance of Stomphia sp.	individuals per 100m^2	abundance
Strongylocentrotus_spp	abundance of Strongylocentrotus spp.	individuals per 100m^2	abundance
Suberites_spp	abundance of Suberites spp.	individuals per 100m^2	abundance
Tachyrhynchus_sp	abundance of Tachyrhynchus sp.	individuals per 100m^2	abundance
Tonicella_sp	abundance of Tonicella sp.	individuals per 100m^2	abundance
Triglops_macellus	abundance of Triglops macellus	individuals per 100m^2	abundance
Triglops_pingelii	abundance of Triglops pingelii	individuals per 100m^2	abundance
Triopha_catalinae	abundance of Triopha catalinae	individuals per 100m^2	abundance
Tripoplax_trifida	abundance of Tripoplax trifida	individuals per 100m^2	abundance
Tritonia_spp	abundance of Tritonia spp.	individuals per 100m^2	abundance
Tunicata_sp_1	abundance of Tunicata sp. 1	individuals per 100m^2	abundance
Tunicata_sp_1a	abundance of Tunicata sp. 1	individuals per 100m^2	abundance
Urticina_sp	abundance of Urticina sp.	individuals per 100m^2	abundance
Velutina_spp	abundance of Velutina spp.	individuals per 100m^2	abundance
Volutopsius_sp	abundance of Volutopsius sp.	individuals per 100m^2	abundance

Database

Contribute Data

Dataset: Trawl abundance
Deployment: OC1707A

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Trawl abundanceDeployment: OC1707A

Dataset acquisition description

Dataset Processing Description

Dataset: Trawl abundance
Deployment: OC1707A