Benthic otter trawl catch data, Porcupine Abyssal Plain, Northeast Atlantic Ocean, RRS Challenger Cruise 142, 1999.

Tammy Horton; Amanda Serpell-Stevens; Georgina Valls Domedel; Brian James Bett

doi:10.15468/4n49jv

Benthic otter trawl catch data, Porcupine Abyssal Plain, Northeast Atlantic Ocean, RRS Challenger Cruise 142, 1999.

Citation

Horton T, Serpell-Stevens A, Valls Domedel G, Bett B J (2024). Benthic otter trawl catch data, Porcupine Abyssal Plain, Northeast Atlantic Ocean, RRS Challenger Cruise 142, 1999.. Version 1.2. The Discovery Collections. Sampling event dataset https://doi.org/10.15468/4n49jv accessed via GBIF.org on 2024-12-15.

Description

These data record the results of processing otter trawl catches (OTSB14; Merrett & Marshall, 1980) from the National Oceanography Centre (NOC, UK) long-term study of the Porcupine Abyssal Plain (PAP), including the PAP-Sustained Observatory time-series. The data concern catches recovered during the RRS Challenger Cruise 142 in 1999. Billett, D.S.M. et al. (2000). RRS Challenger Cruise 142, 19 Apr-19 May 1999. Temporal and spatial variability of benthic communities at the Porcupine Abyssal Plain and in the Porcupine Seabight. Southampton Oceanography Centre Cruise Report, No. 30, 79pp.| https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/ch142_99.pdf

Sampling Description

Study Extent

These data represent the results of processing otter trawl catches (OTSB14; Merrett & Marshall, 1980) from the National Oceanography Centre (NOC, UK) long-term study of the Porcupine Abyssal Plain, including the PAP-Sustained Observatory time-series.

Sampling

These data represent the results of processing otter trawl catches (OTSB14; Merrett & Marshall, 1980) from the National Oceanography Centre (NOC, UK) long-term study of the Porcupine Abyssal Plain, including the PAP-Sustained Observatory time-series. Users should note that we have defined the extent of the PAP-SO as 49° 25´ N 017° 08´ W, 48° 35´ N 015° 52´ W (http://marineregions.org/mrgid/63025), and additionally include data from the wider Porcupine Abyssal Plain (http://marineregions.org/mrgid/4193), this distinction is consistent with that previously applied in the analysis of these data by Billett et al. (2010). These data are presented in quantitative fashion; however, users should note that, in common with other remotely towed samplers, they are likely to represent a substantial underestimation of the true numerical and biomass density of the benthos. Benoist et al. (2019) estimate a general factor of 20 underestimation of biomass density by trawl catch relative to photographic surveys, that estimation appears appropriate for PAP-SO. Similarly, Bett et al. (2001) and Morris et al. (2014) indicate a factor of 20-100 underestimation of numerical density by trawl catch relative to photographic surveys at the PAP-SO. In relation to the various individual body mass and other morphometric measurements presented in this data series, users should note a number of key points: (i) Fresh wet weight and preserved wet weight are variously reported, a 40% loss of body mass may occur during the preservation of larger soft-bodied invertebrates (see, e.g., Billett et al., 2010). Similarly, morphometric measurements are variously reported from fresh and preserved specimens, with the latter potentially subject to shrinkage. Data from fresh and preserved specimens can be distinguished by reference to the fields measurementType and measurementTypeID. (ii) Trawl sampling inevitably results in damage to many specimens, where available, specimen status is reported in the measurementRemarks field. The descriptors used have the following meanings: Intact, the specimen is physically intact, there is no sign of bursting or puncturing, and all major limbs/appendages are present; Damaged, part of the specimen is missing, i.e., it is not physically intact; Dissected, part of the specimen has been dissected for separate analyses; Complete, all parts of the specimen are present, though not necessarily in one piece; Partial, part of the specimen is missing. Users should also note use of the specimen descriptor batch, this refers to counts and/or weights of multiple specimens (or parts thereof). (iii) The various morphometric measurements included are frequently taxon-specific and may be referenced to different morphological features. Information on the detail of these measurements is given in the measurementMethod field (see also the measurementRemarks field). Re-use of such data (for example in the generation of length-weight relationships; see, e.g., Durden et al., 2016) should have regard for these measurement distinctions and potential variations between fresh and preserved specimens [see (i) above].

Method steps

Trawl samples are processed and data generated as described in the following papers: Billett, DSM, Bett, BJ, Rice, AL, Thurston, MH, Galéron, J, Sibuet, M, Wolff, GA, 2001. Long-term change in the megabenthos of the Porcupine Abyssal Plain (NE Atlantic). Progress in Oceanography, 50, 325-348. doi: 10.1016/S0079-6611(01)00060-X Billett, DSM, Bett, BJ, Reid, WKD, Boorman, B, Priede, M, 2010. Long-term change in the abyssal NE Atlantic: The ‘Amperima Event’ revisited. Deep Sea Research II, 57, 1406-1417. doi: 10.1016/j.dsr2.2009.02.001

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

Geographic Coverages

Westmost: -17.191667 [17 11 30 W] Eastmost: -15.383333 [15 23 00 W] Northmost: 50.650000 [50 39 00 N] Southmost: 48.283333 [48 17 00 N]

Bibliographic Citations

Benoist, NMA, Bett, BJ, Morris, KJ, Ruhl, HA, 2019. A generalised volumetric method to estimate the biomass of photographically surveyed benthic megafauna. Progress in Oceanography, 178, 102188. doi: 10.1016/j.pocean.2019.102188 -
Bett, BJ, Malzone, MG, Narayanaswamy, BE, Wigham, BD, 2001. Temporal variability in phytodetritus and megabenthic activity at the seabed in the deep Northeast Atlantic. Progress in Oceanography, 50, 349-368. doi: 10.1016/S0079-6611(01)00066-0 -
Billett, DSM, Rice, AL, 2001. The BENGAL programme: introduction and overview. Progress in Oceanography, 50, 13-25. doi: 10.1016/S0079-6611(01)00046-5 -
Billett, DSM, Bett, BJ, Rice, AL, Thurston, MH, Galéron, J, Sibuet, M, Wolff, GA, 2001. Long-term change in the megabenthos of the Porcupine Abyssal Plain (NE Atlantic). Progress in Oceanography, 50, 325-348. doi: 10.1016/S0079-6611(01)00060-X -
Billett, DSM, Bett, BJ, Reid, WKD, Boorman, B, Priede, M, 2010. Long-term change in the abyssal NE Atlantic: The ‘Amperima Event’ revisited. Deep Sea Research II, 57, 1406-1417. doi: 10.1016/j.dsr2.2009.02.001 -
Durden, JM, Bett, BJ, Horton, T, Serpell-Stevens, A, Morris, KJ, Billett, DSM, Ruhl, HA, 2016. Improving the estimation of deep-sea megabenthos biomass: dimension to wet weight conversions for abyssal invertebrates. Marine Ecology Progress Series, 552, 71-79. doi: 10.3354/meps11769 -
Hartman, SE, Lampitt, RS, Larkin, KE, Pagnani, M, Campbell, J, Gkritzalis, A, Jiang, Z-P, Pebody, C, Ruhl, HA, Gooday, AJ, Bett, BJ, Billett, DSM, Provost, P, Mclachlan, R, Turton, JD, Lankester, S, 2012. The Porcupine Abyssal Plain fixed-point sustained observatory (PAP-SO): variations and trends from the Northeast Atlantic fixed-point time-series. ICES Journal of Marine Science, 69, 776-783. doi: 10.1093/icesjms/fss077 -
Hartman, SE, Bett, BJ, Durden, JM, Henson, SA, Iversen, M, Jeffreys, RM, Horton, T, Lampitt, RS, Gates, AR, 2021. Enduring science: Three decades of observing the Northeast Atlantic from the Porcupine Abyssal Plain Sustained Observatory (PAP-SO). Progress in Oceanography, 191, 102508. doi: 10.1016/j.pocean.2020.102508 -
Jackson, PAB, Thurston, MH, Rice, AL, 1991. Station data for the IOS Benthic Biological Survey of the Porcupine Seabight region (NE Atlantic) 1977-89. Wormley, UK, Institute of Oceanographic Sciences Deacon Laboratory, 88pp. (Institute of Oceanographic Sciences Deacon Laboratory Report 281). https://nora.nerc.ac.uk/id/eprint/115300/ -
Lampitt, RS, Billett, DSM, Martin, AP, 2010. The sustained observatory over the Porcupine Abyssal Plain (PAP): Insights from time series observations and process studies. Deep-Sea Research II, 57, 1267-1271. doi: 10.1016/j.dsr2.2010.01.003 -
Merrett, NR, Marshall, NB, 1980. Observations on the ecology of deep-sea bottom-living fishes collected off northwest Africa (08°-27°N). Progress in Oceanography, 9, 185-244. doi: 10.1016/0079-6611(80)90002-6 -
Morris, KJ, Bett, BJ, Durden, JM, Huvenne, VAI, Milligan, R, Jones, DOB, Ruhl, HA, 2014. A new method for ecological surveying of the abyss using autonomous underwater vehicle photography. Limnology and Oceanography-Methods, 12, 795-809. doi: 10.4319/lom.2014.12.795 -
Rice, AL, 1990. RRS Discovery Cruise 185, 18 Aug - 17 Sep 1989. Abyssal benthic biology at the European Community Station (48° 50' N, 16° 30' W). Wormley, UK, Institute of Oceanographic Sciences Deacon Laboratory, 51pp. (Institute of Oceanographic Sciences Deacon Laboratory Cruise Report 217). https://nora.nerc.ac.uk/id/eprint/114253/ -
Thiel, H, Rice, AL, 1995. Structure and Variability of the Deep‐Sea Benthos - Results from EU Funded Research. Internationale Revue der gesamten Hydrobiologie und Hydrographie, 80, 149-151. doi: 10.1002/iroh.19950800202 -
Thurston, MH, 1986. RRS Challenger Cruise 6A/85 (IOS Cruise 522): 13-28 June 1985. Benthic biology of the Porcupine Seabight. Wormley, UK, Institute of Oceanographic Sciences, 36pp. (Institute of Oceanographic Sciences Cruise Report 178). https://nora.nerc.ac.uk/id/eprint/114199/ -
Thurston, MH, Bett, BJ, Rice, AL, Jackson, PAB, 1994. Variations in the invertebrate abyssal megafauna in the North Atlantic Ocean. Deep Sea Research I, 41, 1321-1348. doi: 10.1016/0967-0637(94)90100-7 -

Contacts

Tammy Horton
originator
position: Senior Research Scientist
National Oceanography Centre
European Way
Southampton
SO14 3ZH
GB
email: tammy.horton@noc.ac.uk

Amanda Serpell-Stevens
originator
position: Research Scientist
National Oceanography Centre

Georgina Valls Domedel
originator
position: Research Scientist
National Oceanography Centre

Brian James Bett
originator
position: Senior Research Scientist
National Oceanography Centre

Tammy Horton
metadata author
position: Senior Research Scientist
National Oceanography Centre
European Way
Southampton
SO14 3ZH
GB
email: tammy.horton@noc.ac.uk

Tammy Horton
administrative point of contact
position: Senior Research Scientist
National Oceanography Centre
European Way
Southampton
SO14 3ZH
GB
email: tammy.horton@noc.ac.uk