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La Mesa, Mario; Piepenburg, Dieter; Pineda-Metz, Santiago E A; Riginella, Emilio; Eastman, Joseph T (2019): Demersal fish assemblages in the southeastern Weddell Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.900446, Supplement to: La Mesa, M et al. (2019): Spatial distribution and habitat preferences of demersal fish assemblages in the southeastern Weddell Sea (Southern Ocean). Polar Biology, https://doi.org/10.1007/s00300-019-02495-3

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Abstract:
Our knowledge on distribution, habitats and behavior of Southern Ocean fishes living at water depths beyond scuba-diving limits is still sparse, as it is difficult to obtain quantitative data on these aspects of their biology. Here, we report the results of an analysis of seabed images to investigate species composition, behavior, spatial distribution and preferred habitats of demersal fish assemblages in the southern Weddell Sea. Our study was based on a total of 2736 high-resolution images, covering a total seabed area of 11,317 m2, which were taken at 13 stations at water depths between 200 and 750 m. Fish were found in 380 images. A total of 379 notothenioid specimens were recorded, representing four families (Nototheniidae, Artedidraconidae, Bathydraconidae, Channichthyidae), 17 genera and 25 species. Nototheniidae was the most speciose family, including benthic species (Trematomus spp.) and the pelagic species Pleuragramma antarctica, which was occasionally recorded in dense shoals. Bathydraconids ranked second with six species, followed by artedidraconids and channichthyids, both with five species. Most abundant species were Trematomus scotti and T. lepidorhinus among nototheniids, and Dolloidraco longedorsalis and Pagetopsis maculatus among artedidraconids and channichthyids, respectively. Both T. lepidorhinus and P. maculatus preferred seabed habitats characterized by biogenous debris and rich epibenthic fauna, whereas T. scotti and D. longedorsalis were frequently seen resting on fine sediments and scattered gravel. Several fish species were recorded to make use of the three-dimensional structure formed by epibenthic foundation species, like sponges, for perching or hiding inside. Nesting behavior was observed, frequently in association with dropstones, in species from various families, including Channichthyidae (Chaenodraco wilsoni and Pagetopsis macropterus) and Bathydraconidae (Cygnodraco mawsoni).
Related to:
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/001-4 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862082
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/007-1 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862083
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/008-2 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862084
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/010-3 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862085
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/026-3 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862086
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/027-2 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862087
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/037-3 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862088
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/048-2 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862089
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/057-3 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862090
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/061-1 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862091
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/072-4 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862092
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/090-4 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862096
Piepenburg, Dieter (2016): Seabed photographs taken along OFOS profile PS96/106-2 during POLARSTERN cruise PS96. PANGAEA, https://doi.org/10.1594/PANGAEA.862094
Coverage:
Median Latitude: -74.784780 * Median Longitude: -28.861246 * South-bound Latitude: -76.719960 * West-bound Longitude: -52.193060 * North-bound Latitude: -70.886610 * East-bound Longitude: -11.108430
Date/Time Start: 2015-12-23T20:42:22 * Date/Time End: 2016-01-31T08:45:56
Minimum DEPTH, water: 197 m * Maximum DEPTH, water: 754 m
Event(s):
PS96/001-4 * Latitude Start: -70.886830 * Longitude Start: -11.110500 * Latitude End: -70.896500 * Longitude End: -11.148170 * Date/Time Start: 2015-12-23T20:43:00 * Date/Time End: 2015-12-23T22:21:00 * Elevation Start: -313.0 m * Elevation End: -290.0 m * Location: Weddell Sea * Campaign: PS96 (ANT-XXXI/2 FROSN) * Basis: Polarstern * Device: Ocean Floor Observation System (OFOS)
PS96/007-1 * Latitude Start: -74.657170 * Longitude Start: -26.939000 * Latitude End: -74.667670 * Longitude End: -26.998170 * Date/Time Start: 2015-12-29T16:04:01 * Date/Time End: 2015-12-29T17:55:00 * Elevation Start: -413.7 m * Elevation End: -414.4 m * Location: Weddell Sea * Campaign: PS96 (ANT-XXXI/2 FROSN) * Basis: Polarstern * Device: Ocean Floor Observation System (OFOS)
PS96/008-2 * Latitude Start: -74.920500 * Longitude Start: -29.422830 * Latitude End: -74.907500 * Longitude End: -29.409670 * Date/Time Start: 2015-12-30T18:30:01 * Date/Time End: 2015-12-30T20:25:00 * Elevation Start: -399.4 m * Elevation End: -404.8 m * Location: Weddell Sea * Campaign: PS96 (ANT-XXXI/2 FROSN) * Basis: Polarstern * Device: Ocean Floor Observation System (OFOS)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventLa Mesa, Mario
2Campaign of eventCampaignLa Mesa, Mario
3Device of eventDeviceLa Mesa, Mario
4Scientific nameScientific nameLa Mesa, Mario
5KingdomKingdomLa Mesa, Mario
6PhylumPhylumLa Mesa, Mario
7ClassClassLa Mesa, Mario
8OrderOrderLa Mesa, Mario
9FamilyFamilyLa Mesa, Mario
10GenusGenusLa Mesa, Mario
11EpithetEpithetLa Mesa, Mariospecific
12Author(s)Author(s)La Mesa, Marioscientific name authorship
13RankRankLa Mesa, Mariotaxon
14Registration number of speciesReg spec noLa Mesa, MarioWoRMS Aphia ID
15Uniform resource locator/link to referenceURL refLa Mesa, MarioWoRMS Aphia ID
16IndividualsInd#La Mesa, Mario>3 = shoal
17InvestigatorInvestigatorLa Mesa, Mariorecorded by
18Reference/sourceReferenceLa Mesa, Mario
19Method commentMethod commLa Mesa, Mariobasis of record
20DATE/TIMEDate/TimeLa Mesa, MarioGeocode
21Area/localityAreaLa Mesa, Mario
22Area/localityAreaLa Mesa, Marioverbatim locality
23LATITUDELatitudeLa Mesa, MarioGeocode
24LONGITUDELongitudeLa Mesa, MarioGeocode
25DEPTH, waterDepth watermLa Mesa, MarioGeocode
26Sample typeSamp typeLa Mesa, Mario
27AreaAream2La Mesa, Mariosampling area
28Uniform resource locator/link to source data fileURL sourceLa Mesa, Mario
29Uniform resource locator/link to imageURL imageLa Mesa, Mario
Size:
8355 data points

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