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