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Quantitative Invertebrate megabenthic data from the Nansen Legacy project collected in 2018 cruise JC2-1 with bottom Campelen trawl from R/V Kronprins Haakon.

Dataset homepage

Citation

Jørgensen L L, Bluhm B, Descoteaux R, Åstrøm E, Morvik A (2024). Quantitative Invertebrate megabenthic data from the Nansen Legacy project collected in 2018 cruise JC2-1 with bottom Campelen trawl from R/V Kronprins Haakon.. The Nansen Legacy Project. Sampling event dataset https://doi.org/10.15468/4ybgsr accessed via GBIF.org on 2024-12-13.

Description

Mega-benthos was sampled from the seabed by the Nansen Legacy joint cruise 1-2, on R/V Kronprins Haakon, 6-23 August 2018 (Cruise 2018707). A Campelen 1800 bottom trawl was used after rigged with rock-hopper ground gear and towed on double warps. The mesh size was 80 mm (stretched) in the front and 16–22 mm in the cod end. The horizontal opening was 11.7 m, and the vertical opening 4 –5 m. The trawl configuration and bottom contact was monitored remotely by SCANMAR trawl sensors. The standard procedure is to tow 15 min after the trawl had contacted the bottom with towing speed of 3 knots, equivalent to a towing distance of 0.75 nautical miles (1.4 km) during a 15 min tow. The trawl settings allow the capture and retention of small-sized fish and the largest benthos (benthic megafauna) from the seabed. In addition, the trawl may also be contaminated by organisms entering the trawl when it is lowered or heaved. The sample was sorted, and each benthos taxon was counted and weighted (i.e., biomass is wet mass) and identified to closest possible taxa onboard the ship. The count of individuals per species/taxa in the trawl (Tot abun) and the wet-weight of the individuals per species/taxa in the trawl (Tot weight (kg)) was recorded. A total of 100 taxa (14 phyla, 28 taxonomic groups), were recorded with 30-46 taxa at each of the five stations. A total of 193 kg mega-benthos was collected with 15 to 88 kg wet weight per station. A total of 40.661 individuals were collected with 2.219 to 18.086 individuals per station. The hauls were standardized to a fixed sampling effort of one nautical mile: abundance per species/taxon as number of individuals per nautical mile and biomass per species/taxon as kg wet weight per nautical mile.

Sampling Description

Study Extent

Northern Barents Sea shelf

Sampling

During this cruise, we sampled epibenthos and demersal fish at five stations with a Campelen 1800 trawl. This data set contains the epibenthos data. The trawl has a mesh size of 80 mm in the wings and 16-22 mm in the cod end and was deployed for 15 min at the seafloor at a target speed of ca. 3 kn. The target net opening is ca. 11,7 m horizontal and 4-5 m vertical.

Method steps

  1. The trawl was deployed at ca. 1 m s-1 wire speed, and after 15 min haul at bottom it was emptied into the chute of RV Kronprins Haakon that leads to a sorting table. Species from the catches were sorted there and identified to the highest taxonomic level possible by the onboard team and supported by a photographic trawl guide compiled by L. Jørgensen based on years of Barents Sea Ecosystem Cruise surveys by the Institute of Marine Research with taxonomic expertise. All individuals were enumerated and weighed by taxon. Data are reported as count and wet weight (kg) per taxon per haul, as well as per nautical mile. Context and first results are in the cruise report (Ingvaldsen et al. 2020, https://doi.org/10.7557/nlrs.5628). Details on sampling are in the protocol book version 1 View of Sampling Protocols (https://doi.org/10.7557/nlrs.5715 ) and generally follow the Institute of Marine Research’s trawl protocol.

Taxonomic Coverages

  1. Nudibranchia
    rank: order
  2. Holothuroidea
    rank: class
  3. Cardiida
    rank: order
  4. Arthropoda
    rank: phylum
  5. Hydrozoa
    rank: class
  6. Pterasteridae
    rank: family
  7. Amphipoda
    rank: order
  8. Bathypolypodidae
    rank: family
  9. Ophiurida
    rank: order
  10. Decapoda
    rank: order
  11. Chromista
    rank: kingdom
  12. Arcidae
    rank: family
  13. Zoantharia
    rank: order
  14. Nemertea
    rank: phylum
  15. Epizoanthidae
    rank: family
  16. Aplousobranchia
    rank: order
  17. Paguridae
    rank: family
  18. Phlebobranchia
    rank: order
  19. Coronatae
    rank: order
  20. Dendrochirotida
    rank: order
  21. Apodida
    rank: order
  22. Nymphonidae
    rank: family
  23. Gorgonocephalidae
    rank: family
  24. Carditida
    rank: order
  25. Velatida
    rank: order
  26. Tetractinellida
    rank: order
  27. Annelida
    rank: phylum
  28. Thoridae
    rank: family
  29. Sepiida
    rank: order
  30. Polychaeta
    rank: class
  31. Hexacorallia
    rank: class
  32. Ascidiidae
    rank: family
  33. Valvatida
    rank: order
  34. Margaritidae
    rank: family
  35. Polycitoridae
    rank: family
  36. Nephtheidae
    rank: family
  37. Phaeophyceae
    rank: class
  38. Chordata
    rank: phylum
  39. Euphausiidae
    rank: family
  40. Spinulosida
    rank: order
  41. Bivalvia
    rank: class
  42. Ascidiacea
    rank: class
  43. Onuphidae
    rank: family
  44. Chaetopteridae
    rank: family
  45. Myriotrochidae
    rank: family
  46. Octocorallia
    rank: class
  47. Polymastiidae
    rank: family
  48. Asteriidae
    rank: family
  49. Bonelliidae
    rank: family
  50. Uristidae
    rank: family
  51. Cyaneidae
    rank: family
  52. Epimeriidae
    rank: family
  53. Sepiolidae
    rank: family
  54. Suberitidae
    rank: family
  55. Periphyllidae
    rank: family
  56. Pycnogonida
    rank: class
  57. Ophiuridae
    rank: family
  58. Colidae
    rank: family
  59. Euphausiacea
    rank: order
  60. Ophiacanthida
    rank: order
  61. Cardiidae
    rank: family
  62. Hormathiidae
    rank: family
  63. Dendronotidae
    rank: family
  64. Benthopectinidae
    rank: family
  65. Chaetiliidae
    rank: family
  66. Sipuncula
    rank: order
  67. Buccinidae
    rank: family
  68. Ophioscolecida
    rank: order
  69. Gastropoda
    rank: class
  70. Arcida
    rank: order
  71. Echinodermata
    rank: phylum
  72. Mollusca
    rank: phylum
  73. Demospongiae
    rank: class
  74. Golfingiidae
    rank: family
  75. Goniasteridae
    rank: family
  76. Suberitida
    rank: order
  77. Ophiacanthidae
    rank: family
  78. Semaeostomeae
    rank: order
  79. Trochida
    rank: order
  80. Poraniidae
    rank: family
  81. Stegocephalidae
    rank: family
  82. Pectinariidae
    rank: family
  83. Echinasteridae
    rank: family
  84. Neogastropoda
    rank: order
  85. Porifera
    rank: phylum
  86. Molpadida
    rank: order
  87. Polymastiida
    rank: order
  88. Cephalaspidea
    rank: order
  89. Pandalidae
    rank: family
  90. Pantopoda
    rank: order
  91. Animalia
    rank: kingdom
  92. Ampharetidae
    rank: family
  93. Phyllodocida
    rank: order
  94. Forcipulatida
    rank: order
  95. Malacalcyonacea
    rank: order
  96. Antedonidae
    rank: family
  97. Echiuroidea
    rank: order
  98. Littorinimorpha
    rank: order
  99. Axinellidae
    rank: family
  100. Eunicida
    rank: order
  101. Ophioscolecidae
    rank: family
  102. Psolidae
    rank: family
  103. Velutinidae
    rank: family
  104. Actiniaria
    rank: order
  105. Crangonidae
    rank: family
  106. Axinellida
    rank: order
  107. Polynoidae
    rank: family
  108. Laodiceidae
    rank: family
  109. Theneidae
    rank: family
  110. Cuspidariidae
    rank: family
  111. Solasteridae
    rank: family
  112. Didemnidae
    rank: family
  113. Ophiopyrgidae
    rank: family
  114. Paxillosida
    rank: order
  115. Alcyoniidae
    rank: family
  116. Platyhelminthes
    rank: phylum
  117. Astartidae
    rank: family
  118. Euryalida
    rank: order
  119. Comatulida
    rank: order
  120. Ctenodiscidae
    rank: family
  121. Terebellidae
    rank: family
  122. Terebellida
    rank: order
  123. Echinoidea
    rank: class
  124. Naticidae
    rank: family
  125. Ochrophyta
    rank: phylum
  126. Scyphozoa
    rank: class
  127. Cephalopoda
    rank: class
  128. Amphilepidida
    rank: order
  129. Leptothecata
    rank: order
  130. Ophiuroidea
    rank: class
  131. Laonidae
    rank: family
  132. Malacostraca
    rank: class
  133. Camarodonta
    rank: order
  134. Molpadiidae
    rank: family
  135. Strongylocentrotidae
    rank: family
  136. Octopoda
    rank: order
  137. Flabelligeridae
    rank: family
  138. Isopoda
    rank: order
  139. Asteroidea
    rank: class
  140. Crinoidea
    rank: class
  141. Ophiopholidae
    rank: family
  142. Cnidaria
    rank: phylum
  143. Bryozoa
    rank: phylum
  144. Astropectinidae
    rank: family

Geographic Coverages

Mega-benthos was sampled from the seabed by the Nansen Legacy joint cruise 1-2, on R/V Kronprins Haakon, 6-23 August 2018 (Cruise 2018707) in the northern Barents Sea.

Bibliographic Citations

Contacts

Lis L. Jørgensen
originator
position: Researcher
Institute of Marine Research
Tromsø
NO
email: lis.lindal.joergensen@hi.no
Bodil Bluhm
originator
position: Professor
UiT The Arctic University of Norway
Tromsø
NO
email: bodil.bluhm@uit.no
Raphaelle Descoteaux
originator
position: PhD student (at that time)
UiT The Arctic University of Norway
Tromsø
NO
email: Raphaelle.descoteaux@uit.no
Emmelie Åstrøm
originator
position: Post-Doc (at that time)
UiT The Arctic University of Norway
Tromsø
NO
email: emmelie.astrom@gmail.com
Arnfinn Morvik
metadata author
email: arnfinn.morvik@imr.no
Lis L. Jørgensen
principal investigator
position: Researcher
Institute of Marine Research
Tromsø
NO
email: lis.lindal.joergensen@hi.no
Lis L. Jørgensen
administrative point of contact
position: Researcher
Institute of Marine Research
Tromsø
NO
email: lis.lindal.joergensen@hi.no
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