fishes in th barents sea species list: dolgov (2002) stiansen and filin (2007,2008) joint report 204...
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Fishes in th Barents SeaSpecies list:
Dolgov (2002) Stiansen and Filin (2007,2008) Joint report
204 species of fish in the BS
Andriashev and Chernova (1995) list 163 species in seven zoogeographical groups
The Barents Sea is the boundary area between Arctic and boreal fauna
the southern boundary of Arctic fishes and northern boundary of Boreal fishes (Michael Sars,1851, G.O. Sars 1857)
Species list:Dolgov (2002) modified in Stiansen and Filin (2007,2008) Joint report 204 species of fish in the BS
Andriashev and Chernova (1995) list 166 species in seven zoogeographical groups
Ecosystem survey data (2004-2009)
The most spatially extensive survey in the BS ever
FISH ATLAS
Species recorded at the Ecosystem survey classified according to Rijnsdorp et al. (2010)
Arctic: southern limit off northern Norway
Boreal: extends into colder areas Southern limit around British isles and west of Brittany
Lusitian:Abundant from the Iberian peninsula to the britsh isles
Atlantic:Mostly pelagic or deep water, widespread in the North Atlantic
Atlas of the Barents Sea fishes
Authors
IMR – Rupert Wienerroither, Edda Johannesen, Herdis Langøy, Kirsti Børve Eriksen, Thomas de Lange Wenneck, Åge
Høines and Otte Bjelland
PINRO – Andrey Dolgov, Dmitry Prozorkevich, Tatiana Prokhorova
and Konstantin Drevetnyak
Bergen Museum - Ingvar Byrkjedal and Gunnar Langhelle
Structure of the Atlas
• 249 pages• 2952 bottom
trawlings• 101 species
Data gridding
• Data were gridded into a 35 nm by 35 nm grid with 384 grid cells based on our survey design and calculated average catch rates per grid cell.
Problem species• the genus Careproctus • the genus Gymnelus • the Ammotydes genus - they are difficult to distinguish and
because there are no confirmed observations of A. tobianus after 1998.
• all Myctophidae since they are in a poor condition after trawling and difficult to identify to the species level, however, we show observation at the species level recorded by taxonomists, showing that most of the Myctophidae in the Barents Sea is Benthosema glaciale.
• the Icelus genus (I. spatula and I. bicornis), since they are difficult to separate morphologically.
• data on Cottunculus microps and Cottunculus sadko on the same maps since recent research indicates that these are indeed one species.
• In addition to maps of the Sebastes species, we also provide a map on Sebastes spp., representing juveniles.
Species description-commercial
Species description-non-target
Arctic Boreal
Atlantic Lusitian
Community structure of demersal fish in the BS n=82
Species rank log rel abundance
Colour coding according to Andriyashev & Chernova:arctic = blue, mainly arctic = green, arcto-boreal = purple, mainly boreal = red, boreal = orange,south boreal = yellow,widely distributed or missing = grey
Johannesen et al. In prep.
=> Biomass cod is dominating
-4 -2 0 2 4
-4-2
02
4
CCA1 (8.17 %)
CC
A2
(4.5
8 %
)
-10
1-1
01
Longitude
Latitude
Depth
Salinity
Temperature
Colour coding according to Andriyashev & Chernova:arctic = blue, mainly arctic = green, arcto-boreal = purple, mainly boreal = red, boreal = orange, south boreal = yellow,widely distributed or missing = grey
Variables ranked according to importance and added % variation explainedTotal model: 17.3 % explainedYears explain 1,1 %All variables are significant!
Var Df AIC F N.Perm Pr(>F) Add % expl. Acc. %Temperature 1 12531 178.171 199 0.005 ** 6,249057 6,249057
latitude 1 12571 135.768 199 0.005 ** 3,343019 9,592076depth 1 12580 126.475 199 0.005 ** 4,139253 13,731329
longitude 1 12604 100.599 199 0.005 ** 1,659836 15,391165year 1 12690 13.368 199 0.005 ** 1,060707 17,3120475
salinity 1 12646 58.081 199 0.005 ** 0,8601755 16,2513405
Geograpical patterns in species density and body size
Strongly correlated With individual density
Cluster analysis-Biomass-Abundance-Presence-absence
Biomass/Abundance: more important from an ecological point of view
South East
0 10 20 30 40 50 60
010
3050
70 South West
Spe
cies
0 50 100 150
010
3050
70 South East
0 50 100 150
010
3050
70 Novaya Zemlya
0 200 600 1000 1400
010
3050
70 Atlantic
Spe
cies
0 200 400 600 800
010
3050
70 Arctic
number of Stations
0 5 10 15 20
010
3050
70 High Arctic
TRIGLOPS_NYBELIN 0.237535008
HIPPOGLOSSOIDES_PLA 0.233585207LIPARIS_FABRICII 0.103563316ARTEDIELLUS_ATLANTI 0.089093925GADUS_MORHUA 0.070261587
MICROMESISTIUS_POUTASSOU 0.391683HIPPOGLOSSOIDES_PLATESSOIDES 0.151186MELANOGRAMMUS_AEGLEFINUS 0.138315TRISOPTERUS_ESMARKII 0.101973GADUS_MORHUA 0.087006
LIPARIS_FABRICII 0.456279TRIGLOPS_NYBELINI 0.209899REINHARDTIUS_HIPP 0.140585ARTEDIELLUS_ATLAN 0.046354CAREPROCTUS 0.034413
HIPPOGLOSSOIDES_PLATESSOIMELANOGRAMMUS_AEGLEFIGADUS_MORHUAPLEURONECTES_PLATESSALUMPENUS_LAMPRETAE
TRISOPTERUS_ES 0.546829MICROMESISTIUS 0.251298MELANOGRAMM 0.103651SEBASTES_VIVIPA 0.024005POLLACHIUS_VIR 0.018418
HIPPOGLOSSOIDES_PLATESSOIGADUS_MORHUA
GYMNOCANTHUS_TRICUSPISLIPARIS_FABRICIIULCINA_OLRIKII
Body massKg/ind