The Danish research vessels Dana and Havfisken are used for the Danish participation in the Baltic International Trawl Survey (BITS), which, since 1982, has had the purpose of annually monitoring cod and other species.

Internationally, each nation surveys part of the area, with some overlap in coverage and depth stratification, in a coordinated sampling design. After agreement between countries a common standard trawl gear and standard sampling procedures were implemented in 2000, resulting in the consistent coverage of the western and central Baltic Sea.

The BITS is conducted twice a year in the first and fourth quarters as a depth-stratified survey. The strata are based on sub-divisions and depth layers. Each year the necessary stations are randomly selected before the beginning of the international trawl surveys, from a list of clear haul data. These stations are a stratified randomly selected sub-sample of the possible trawl tracks.

The standard haul is a 30-minutes haul with a towing speed of 3 knots. Trawling only takes place during daylight, defined as the time between 15 minutes past sunrise and 15 minutes before sunset.

Period

Quarter 1

Activity

Here is shown a map with the survey activity for both vessls. The map shows both valid and invalid stations, a station can be deemed invalid if the haoul could not be conducted within the guilines of the survey manual

Trawl Stations

Each trawl stations consists a haul of 30 minutes where all the catch documented, including litter. Biological samples to determine e.g. stock, age matuity are taken from individual fish.

Bongo Stations

Each bongo stationsions in conducted with a set of three bongonets, with net sizes 150, 300 and 500 micrometers. These are used for the registartion of fishlarvey, plankton abundance and jelly fish.

CTD Stations

CTD (Conductivity - Temperature - Depth), are measured trough the water column, and used to calculate e.g. the oxygen and salinity content, key environmental variables for life in the ocean.

CTD Results

Here is shown a map the results of the CTD measurments at the bottom. The heatmap is made with linear interpolation between measurments, and can be seen as the general trend in the monment of the survey. If any CTD stations are not plotted data has not yet been precessed

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

Below is a table with the total catche and catches for selected species, in wiegth and numbers. The numbers are in some instances calculated based on representative subsampling of some abundant species. The maps illustrates for biodiveity the number of different species cougt on each station, and for CPUE (catch per unit effort) the catch in numbers standadized to a unit effort of one hour of hauling.


	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Total Catch	51015.1	2437272
Sprat	20895.0	2013218	60	180
Cod	9608.2	18413	50	1000
Herring	6366.7	243486	80	305
Plaice	1523.2	14209	70	460
Sole	7.2	42	100	400

CPUE

CPUE (catch per unit effort) shown as the catch in Numbers rasied to to pr hour of hauling

CPUE for Selected Species

CPUE (catch per unit effort) shown as the catch in Numbers rasied to to pr hour of hauling. The dots indicates the stations, and red dots indicates that a species where not found at all in that station. The scale is different between plots

Cod

Plaice

Sole

Sprat

Herring

Biodiversity

Shown is the Number of species cought by station

Length Distributions

Here is shown the length distribution For the 10 most abundant comercieal species cought during the survey, allocated to each ship. The black line represents the average length distribution of the 5 years previus surveys.

Sprat

Herring

Common dab

Flounder

Whiting

Cod

Plaice

Grey gurnard

Hake

Horse mackerel

All Species Caught

The table below is an overview of all the different species cought in the survey, devided into the different ices areas covered by the surve.

Area 20


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Arnoglossus laterna	Scaldfish	0.1	9	100	140
Atlantopandalus propinqvus	Similar Shrimp	0.0	1
Buglossidium luteum	Solenette	0.0	1	90	90
Callionymus lyra	Common dragonet	0.9	60	70	200
Callionymus maculatus	Spotted dragonet	0.3	28	90	150
Cephalopoda	Squids and octopusses	0.2	29
Clupea harengus	Herring	290.1	15801	85	215
Cyclopterus lumpus	Lumpfish	2.9	1
Eutrigla gurnardus	Grey gurnard	0.4	33	80	180
Gadus morhua	Cod	0.8	26	90	220
Glyptocephalus cynoglossus	Witch	0.0	1	160	160
Hippoglossoides platessoides	American plaice	2.6	78	80	240
Limanda limanda	Common dab	20.9	343	100	280
Merlangius merlangus	Whiting	83.9	2360	100	260
Merluccius merluccius	Hake	0.6	9	120	290
Nephrops norvegicus	Norway lobster	7.5	118
Pandalus borealis	Northern pink shrimp	0.0	1
Platichthys flesus	Flounder	5.0	26	180	360
Pleuronectes platessa	Plaice	1.2	19	100	310
Pomatoschistus spp.	Sand gobies	0.0	2	70	100
Scomber scombrus	Mackerel	0.3	1	320	320
Scophthalmus rhombus	Brill	2.3	4	330	380
Solea solea	Sole	0.2	1	260	260
Sprattus sprattus	Sprat	21.5	2706	70	145
Trisopterus esmarkii	Norway pout	0.1	12	100	130

Area 21


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.0	1	150	150
Amblyraja radiata	Starry ray	0.8	2	330	340
Ammodytes marinus	Lesser sandeel	0.1	8	175	195
Arnoglossus laterna	Scaldfish	0.3	26	90	160
Buglossidium luteum	Solenette	0.0	4	70	90
Callionymidae	Dragonets	9.7	1318	70	220
Callionymus lyra	Common dragonet	1.7	121	70	220
Callionymus maculatus	Spotted dragonet	0.9	116	90	140
Cancer pagurus	Edible crab	4.2	7
Cephalopoda	Squids and octopusses	2.4	408
Chelidonichthys lucerna	Tub gurnard	0.3	1	300	300
Clupea harengus	Herring	4434.1	178994	80	295
Crangon crangon	Common shrimp	0.1	36
Enchelyopus cimbrius	Four-bearded rockling	0.3	14	130	210
Engraulis encrasicolus	Anchovy	1.0	110	90	150
Eutrigla gurnardus	Grey gurnard	11.6	210	90	300
Gadus morhua	Cod	170.2	339	90	820
Glyptocephalus cynoglossus	Witch	3.0	24	120	380
Hippoglossoides platessoides	American plaice	39.2	1774	50	270
Labrus bergylta	Ballan wrasse	0.2	3	120	170
Limanda limanda	Common dab	420.0	10884	70	320
Lumpenus lampretaeformis	Snake blenny	2.1	199	130	270
Melanogrammus aeglefinus	Haddock	2.9	33	120	480
Merlangius merlangus	Whiting	625.1	16008	70	320
Merluccius merluccius	Hake	12.0	228	110	340
Microstomus kitt	Lemon sole	5.4	63	90	280
Molva molva	Ling	1.7	6	230	610
Mullus surmuletus	Striped red mullet	0.7	16	110	240
Myoxocephalus scorpius	Sculpin	12.7	102	100	290
Myxine glutinosa	Hagfish	0.0	1	270	270
Nephrops norvegicus	Norway lobster	99.8	2427
Pandalus borealis	Northern pink shrimp	16.8	105
Petromyzon marinus	Sea lamprey	0.0	1	240	240
Pholis gunnellus	Butter fish	0.1	6	170	200
Platichthys flesus	Flounder	225.3	857	130	450
Pleuronectes platessa	Plaice	288.4	2500	70	420
Pomatoschistus spp.	Sand gobies	0.2	14	90	120
Raja clavata	Thornback ray	5.6	1	860	860
Sardina pilchardus	Pilchard	0.0	1	180	180
Scomber scombrus	Mackerel	0.2	3	180	220
Scophthalmus maximus	Turbot	7.8	5	260	550
Scophthalmus rhombus	Brill	15.2	34	190	450
Solea solea	Sole	1.9	13	150	340
Sprattus sprattus	Sprat	1034.3	74142	65	180
Squalus acanthias	Spurdog	0.9	1	600	600
Trachinus draco	Greater weever fish	13.2	177	90	360
Trachurus trachurus	Horse mackerel	1.6	7	110	350
Trisopterus esmarkii	Norway pout	0.2	17	90	140
Trisopterus minutus	Poor-cod	0.5	12	140	180
Zeugopterus punctatus	Topknot	0.0	2	90	90

Area 22


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.6	28	100	170
Amblyraja radiata	Starry ray	1.3	2	410	450
Ammodytes marinus	Lesser sandeel	0.0	2	150	180
Ammodytes tobianus	Sandeel	0.1	5	160	205
Arctica islandica	Ocean quahaug	121.3	0
Arnoglossus laterna	Scaldfish	0.7	40	80	160
Callionymus lyra	Common dragonet	1.5	100	80	220
Chelidonichthys lucerna	Tub gurnard	0.6	2	270	310
Clupea harengus	Herring	302.6	12339	80	275
Cyclopterus lumpus	Lumpfish	5.0	3	290	440
Enchelyopus cimbrius	Four-bearded rockling	0.3	4	180	270
Engraulis encrasicolus	Anchovy	0.2	15	100	140
Eutrigla gurnardus	Grey gurnard	1.6	24	100	260
Gadus morhua	Cod	72.8	158	110	820
Gasterosteus aculeatus	Three-spined stickleback	43.5	26870	40	60
Glyptocephalus cynoglossus	Witch	0.0	2	140	150
Gobius niger	Black goby	0.2	12	70	140
Hippoglossoides platessoides	American plaice	31.4	679	60	300
Hyperoplus lanceolatus	Greater sandeel	0.3	11	155	235
Labrus bergylta	Ballan wrasse	0.0	1	140	140
Limanda limanda	Common dab	1927.1	36954	60	350
Lumpenus lampretaeformis	Snake blenny	1.6	92	160	320
Melanogrammus aeglefinus	Haddock	0.4	6	170	210
Merlangius merlangus	Whiting	69.7	1840	100	410
Merluccius merluccius	Hake	0.7	5	140	320
Microstomus kitt	Lemon sole	9.1	36	200	310
Myoxocephalus scorpius	Sculpin	39.7	472	80	280
Pholis gunnellus	Butter fish	0.3	21	150	200
Platichthys flesus	Flounder	167.5	742	120	480
Pleuronectes platessa	Plaice	717.8	7477	70	450
Pomatoschistus spp.	Sand gobies	0.2	31	50	110
Scophthalmus maximus	Turbot	8.9	14	200	440
Scophthalmus rhombus	Brill	2.0	6	170	450
Solea solea	Sole	5.2	28	100	400
Sprattus sprattus	Sprat	910.8	80552	60	180
Trachinus draco	Greater weever fish	0.4	9	130	290
Trisopterus esmarkii	Norway pout	0.0	1	80	80
Trisopterus minutus	Poor-cod	0.2	6	90	160
Zoarces viviparus	Eelpout	2.2	123	110	240

Area 23


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Ammodytes marinus	Lesser sandeel	0.0	1	170	170
Arnoglossus laterna	Scaldfish	0.0	2	80	120
Clupea harengus	Herring	95.3	3212	90	285
Cyclopterus lumpus	Lumpfish	4.8	4	290	380
Gadus morhua	Cod	3649.8	2077	110	1000
Hippoglossoides platessoides	American plaice	0.4	3	210	290
Limanda limanda	Common dab	73.6	488	110	330
Melanogrammus aeglefinus	Haddock	0.1	1	200	200
Merlangius merlangus	Whiting	131.4	1183	80	410
Merluccius merluccius	Hake	0.2	1	310	310
Mytilus edulis	Blue mussel	319.3	0
Platichthys flesus	Flounder	10.9	47	150	400
Pleuronectes platessa	Plaice	78.3	274	90	430
Scophthalmus maximus	Turbot	0.5	2	220	240
Scophthalmus rhombus	Brill	4.1	5	270	470
Sprattus sprattus	Sprat	223.7	14654	70	175
Zoarces viviparus	Eelpout	0.1	1	220	220

Area 24


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.1	3	140	170
Clupea harengus	Herring	71.0	2643	105	305
Gadus morhua	Cod	179.8	589	80	670
Hyperoplus lanceolatus	Greater sandeel	12.4	748	165	205
Limanda limanda	Common dab	72.4	540	60	340
Liparis liparis	Sea snail	0.0	1	80	80
Merlangius merlangus	Whiting	56.6	373	130	400
Merluccius merluccius	Hake	0.2	1	320	320
Myoxocephalus scorpius	Sculpin	3.2	21	130	280
Mytilus edulis	Blue mussel	135.1	0
Platichthys flesus	Flounder	73.7	428	110	410
Pleuronectes platessa	Plaice	88.0	468	100	460
Scophthalmus maximus	Turbot	9.9	23	200	380
Scophthalmus rhombus	Brill	2.0	8	190	310
Sprattus sprattus	Sprat	24.3	3358	70	170

Area 25


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Alosa fallax	Twaite shad	0.2	4	170	200
Ammodytes marinus	Lesser sandeel	0.0	1	180	180
Clupea harengus	Herring	1081.2	28123	90	295
Crystallogobius linearis	Crystal goby	0.0	5	40	50
Enchelyopus cimbrius	Four-bearded rockling	10.4	178	140	340
Engraulis encrasicolus	Anchovy	0.3	69	90	180
Gadus morhua	Cod	5452.0	14930	70	620
Gasterosteus aculeatus	Three-spined stickleback	0.8	399	40	70
Hyperoplus lanceolatus	Greater sandeel	1.7	111	160	190
Limanda limanda	Common dab	1.1	7	180	310
Merlangius merlangus	Whiting	191.1	1047	100	410
Merluccius merluccius	Hake	0.4	1	370	370
Microstomus kitt	Lemon sole	0.2	1	260	260
Myoxocephalus scorpius	Sculpin	13.2	97	170	270
Mytilus edulis	Blue mussel	11.9	0
Platichthys flesus	Flounder	6528.7	32430	160	420
Pleuronectes platessa	Plaice	348.2	3456	130	350
Scomber scombrus	Mackerel	11.4	40	200	470
Scophthalmus maximus	Turbot	1.3	3	240	300
Sprattus sprattus	Sprat	18627.4	1832143	70	155
Trachurus trachurus	Horse mackerel	1.3	127	100	240
Zoarces viviparus	Eelpout	0.0	1	160	160

Area 26


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Clupea harengus	Herring	92.3	2375	80	215
Cyclopterus lumpus	Lumpfish	0.2	1	160	160
Enchelyopus cimbrius	Four-bearded rockling	0.2	13	30	210
Gadus morhua	Cod	82.7	293	50	480
Gasterosteus aculeatus	Three-spined stickleback	0.1	63	40	60
Myoxocephalus scorpius	Sculpin	0.8	6	180	250
Platichthys flesus	Flounder	815.3	2746	150	330
Pleuronectes platessa	Plaice	1.4	16	180	250
Sprattus sprattus	Sprat	52.9	5662	70	140

Quarter 4

Activity

Trawl Stations

Each trawl stations consists a haul of 30 minutes where all the catch documented, including litter. Biological samples to determine e.g. stock, age matuity are taken from individual fish.

Bongo Stations

Each bongo stationsions in conducted with a set of three bongonets, with net sizes 150, 300 and 500 micrometers. These are used for the registartion of fishlarvey, plankton abundance and jelly fish.

CTD Stations

CTD (Conductivity - Temperature - Depth), are measured trough the water column, and used to calculate e.g. the oxygen and salinity content, key environmental variables for life in the ocean.

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview


	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Total Catch	39585.0	1610954
Sprat	12177.6	955270	60	160
Herring	11704.6	364932	65	310
Cod	2777.9	14316	50	770
Plaice	1907.3	20165	70	440
Sole	60.8	437	90	420

CPUE

CPUE (catch per unit effort) shown as the catch in Numbers rasied to to pr hour of hauling

CPUE for Selected Species

Cod

Plaice

Sole

Sprat

Herring

Biodiversity

Shown is the Number of species cought by station

Length Distributions

Sprat

Herring

Common dab

Whiting

Norway pout

Plaice

Horse mackerel

Cod

Haddock

Flounder

All Species Caught

The table below is an overview of all the different species cought in the survey, devided into the different ices areas covered by the surve.

Area 20


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Arnoglossus laterna	Scaldfish	0.4	29	90	150
Buglossidium luteum	Solenette	0.0	1	90	90
Callionymus lyra	Common dragonet	2.1	62	90	220
Callionymus maculatus	Spotted dragonet	0.0	2	100	120
Cancer pagurus	Edible crab	0.3	1
Cephalopoda	Squids and octopusses	0.7	3
Clupea harengus	Herring	8.4	726	90	220
Enchelyopus cimbrius	Four-bearded rockling	0.0	1	210	210
Eutrigla gurnardus	Grey gurnard	0.9	23	130	200
Gadus morhua	Cod	23.5	197	90	400
Hippoglossoides platessoides	American plaice	1.1	20	130	230
Limanda limanda	Common dab	42.7	487	140	240
Melanogrammus aeglefinus	Haddock	0.2	6	110	170
Merlangius merlangus	Whiting	167.8	8224	70	260
Merluccius merluccius	Hake	8.3	29	270	490
Microstomus kitt	Lemon sole	0.7	24	110	200
Nephrops norvegicus	Norway lobster	0.1	3
Pleuronectes platessa	Plaice	5.1	62	140	290
Pomatoschistus spp.	Sand gobies	0.0	1	90	90
Solea solea	Sole	0.2	1	270	270
Sprattus sprattus	Sprat	9.4	956	90	130
Squalus acanthias	Spurdog	78.5	27	250	1110
Trachinus draco	Greater weever fish	0.3	3	140	320
Trachurus trachurus	Horse mackerel	0.0	3	100	130
Trisopterus esmarkii	Norway pout	43.2	5375	80	120

Area 21


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.2	6	110	190
Amblyraja radiata	Starry ray	5.0	9	400	490
Anguilla anguilla	Eel	0.1	1	330	330
Argentina sphyraena	Lesser silver smelt	0.0	1	130	130
Arnoglossus laterna	Scaldfish	5.9	417	70	150
Asterias rubens	Common starfish	46.7	0
Buglossidium luteum	Solenette	0.2	17	70	130
Callionymus lyra	Common dragonet	13.5	603	70	220
Callionymus maculatus	Spotted dragonet	3.3	376	80	150
Cancer pagurus	Edible crab	60.9	103	106	149
Cephalopoda	Squids and octopusses	9.3	1210
Chelidonichthys lucerna	Tub gurnard	2.7	7	220	440
Ciliata mustela	Five-bearded rockling	0.1	1	220	220
Clupea harengus	Herring	376.4	24124	85	310
Crangon crangon	Common shrimp	0.3	108
Enchelyopus cimbrius	Four-bearded rockling	0.8	29	130	250
Engraulis encrasicolus	Anchovy	0.5	56	100	180
Eutrigla gurnardus	Grey gurnard	35.0	629	110	340
Gadus morhua	Cod	61.2	429	80	660
Glyptocephalus cynoglossus	Witch	8.2	113	150	410
Gobius niger	Black goby	0.4	18	80	150
Hippoglossoides platessoides	American plaice	111.5	5522	60	280
Leptoclinus maculatus	Spotted snake blenny	0.0	1	170	170
Limanda limanda	Common dab	1586.9	38704	90	280
Lumpenus lampretaeformis	Snake blenny	0.3	21	130	270
Lycodes gracilis	Vahls eelpout	1.8	18	190	420
Melanogrammus aeglefinus	Haddock	372.1	8353	110	300
Merlangius merlangus	Whiting	1155.2	31958	60	300
Merluccius merluccius	Hake	44.9	250	190	490
Microstomus kitt	Lemon sole	18.0	220	90	310
Molva molva	Ling	1.3	4	320	530
Mullus surmuletus	Striped red mullet	0.2	6	90	200
Myoxocephalus scorpius	Sculpin	19.8	226	100	280
Nephrops norvegicus	Norway lobster	43.8	805	36	60
Pasiphaea	Pasiphaea	1.2	300
Pholis gunnellus	Butter fish	0.1	4	160	190
Platichthys flesus	Flounder	116.3	657	130	420
Pleuronectes platessa	Plaice	445.0	4335	110	440
Pollachius virens	Saithe	0.0	1	150	150
Pomatoschistus spp.	Sand gobies	0.3	28	70	120
Raja clavata	Thornback ray	4.7	2	450	770
Scomber scombrus	Mackerel	5.4	41	150	420
Scophthalmus maximus	Turbot	6.6	13	190	470
Scophthalmus rhombus	Brill	46.3	105	180	530
Scyliorhinus canicula	Lesser-spotted dogfish	1.5	7	210	560
Solea solea	Sole	23.4	161	170	330
Sprattus sprattus	Sprat	957.7	93989	65	155
Squalus acanthias	Spurdog	58.3	25	690	950
Symphodus melops	Corkwing	0.1	1	160	160
Trachinus draco	Greater weever fish	746.8	11774	110	340
Trachurus trachurus	Horse mackerel	20.5	1427	70	350
Trisopterus esmarkii	Norway pout	180.4	21002	80	120
Trisopterus minutus	Poor-cod	0.2	4	150	200
Zeugopterus punctatus	Topknot	0.1	2	90	100
Zoarces viviparus	Eelpout	0.1	2	190	210

Area 22


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.2	10	120	170
Amblyraja radiata	Starry ray	0.9	2	350	410
Ammodytes marinus	Lesser sandeel	0.0	2	195	220
Arctica islandica	Ocean quahaug	150.6	0
Arnoglossus laterna	Scaldfish	1.4	116	70	150
Buglossidium luteum	Solenette	0.0	4	60	100
Callionymus lyra	Common dragonet	10.0	323	80	230
Callionymus maculatus	Spotted dragonet	0.2	25	90	120
Cancer pagurus	Edible crab	2.3	2	180	197
Cephalopoda	Squids and octopusses	0.4	107	80	80
Chelidonichthys lucerna	Tub gurnard	0.3	2	220	280
Chelon labrosus	Thick lipped mullet	0.0	1	150	150
Clupea harengus	Herring	297.0	22589	65	260
Ctenolabrus rupestris	Goldsinny	0.0	2	70	90
Enchelyopus cimbrius	Four-bearded rockling	0.2	6	130	240
Engraulis encrasicolus	Anchovy	3.9	636	70	170
Eutrigla gurnardus	Grey gurnard	28.7	681	120	270
Gadus morhua	Cod	37.2	1082	70	770
Gasterosteus aculeatus	Three-spined stickleback	0.0	1	60	60
Glyptocephalus cynoglossus	Witch	0.0	1	140	140
Gobius niger	Black goby	0.7	65	60	140
Hippoglossoides platessoides	American plaice	25.9	965	90	280
Hyperoplus lanceolatus	Greater sandeel	0.1	5	170	205
Labrus bergylta	Ballan wrasse	0.2	11	70	140
Limanda limanda	Common dab	2624.9	71611	60	320
Lumpenus lampretaeformis	Snake blenny	0.4	31	110	320
Melanogrammus aeglefinus	Haddock	0.8	17	110	190
Merlangius merlangus	Whiting	366.9	7519	60	360
Merluccius merluccius	Hake	3.5	11	290	410
Microstomus kitt	Lemon sole	3.2	13	140	320
Mullus surmuletus	Striped red mullet	0.2	6	90	180
Myoxocephalus scorpius	Sculpin	20.1	221	120	260
Nephrops norvegicus	Norway lobster	0.1	1	60	60
Pholis gunnellus	Butter fish	0.1	7	130	190
Platichthys flesus	Flounder	81.3	415	130	460
Pleuronectes platessa	Plaice	794.0	11718	70	370
Pollachius virens	Saithe	0.1	2	160	170
Pomatoschistus spp.	Sand gobies	6.9	2208	40	150
Scomber scombrus	Mackerel	4.7	67	180	230
Scophthalmus maximus	Turbot	30.5	58	160	460
Scophthalmus rhombus	Brill	14.8	26	230	430
Solea solea	Sole	32.4	241	90	420
Sprattus sprattus	Sprat	1187.3	100589	60	160
Trachinus draco	Greater weever fish	11.6	221	110	280
Trachurus trachurus	Horse mackerel	272.5	15862	70	140
Trisopterus esmarkii	Norway pout	0.0	1	120	120
Trisopterus minutus	Poor-cod	0.0	1	150	150
Zoarces viviparus	Eelpout	1.2	55	100	270

Area 23


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Arnoglossus laterna	Scaldfish	0.1	5	90	170
Callionymus lyra	Common dragonet	0.0	3	80	160
Callionymus maculatus	Spotted dragonet	0.1	10	100	120
Chelidonichthys lucerna	Tub gurnard	0.1	1	230	230
Clupea harengus	Herring	184.7	7794	95	260
Enchelyopus cimbrius	Four-bearded rockling	0.0	1	220	220
Engraulis encrasicolus	Anchovy	0.0	1	170	170
Eutrigla gurnardus	Grey gurnard	0.4	5	170	260
Gadus morhua	Cod	122.8	184	160	700
Gobius niger	Black goby	0.1	2	100	140
Hippoglossoides platessoides	American plaice	4.4	72	110	310
Hyperoplus lanceolatus	Greater sandeel	0.0	2	180	190
Limanda limanda	Common dab	377.6	3943	70	320
Melanogrammus aeglefinus	Haddock	0.1	3	140	150
Merlangius merlangus	Whiting	108.6	1785	80	320
Merluccius merluccius	Hake	1.7	6	230	400
Myoxocephalus scorpius	Sculpin	0.1	1	170	170
Mytilus edulis	Blue mussel	292.1	0
Nephrops norvegicus	Norway lobster	0.2	1
Platichthys flesus	Flounder	104.6	364	150	400
Pleuronectes platessa	Plaice	132.2	555	80	430
Pomatoschistus spp.	Sand gobies	0.0	3	100	110
Scomber scombrus	Mackerel	0.3	1	320	320
Scophthalmus maximus	Turbot	5.3	6	280	470
Scophthalmus rhombus	Brill	8.8	13	240	540
Solea solea	Sole	4.4	32	160	360
Spinachia spinachia	Ten spined stickleback	0.0	1	300	300
Sprattus sprattus	Sprat	231.3	16377	85	160
Trachinus draco	Greater weever fish	1.2	13	120	290
Trachurus trachurus	Horse mackerel	6.5	501	70	140

Area 24


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Ammodytes marinus	Lesser sandeel	0.0	1	160	160
Clupea harengus	Herring	99.1	6930	90	215
Enchelyopus cimbrius	Four-bearded rockling	0.1	1	220	220
Engraulis encrasicolus	Anchovy	0.0	3	90	110
Gadus morhua	Cod	46.0	546	80	710
Hyperoplus lanceolatus	Greater sandeel	0.5	35	160	200
Limanda limanda	Common dab	139.0	2319	80	330
Melanogrammus aeglefinus	Haddock	0.0	1	160	160
Merlangius merlangus	Whiting	23.0	320	110	330
Myoxocephalus scorpius	Sculpin	1.6	16	160	250
Platichthys flesus	Flounder	229.5	1260	130	420
Pleuronectes platessa	Plaice	257.1	1869	90	440
Pomatoschistus spp.	Sand gobies	0.4	22	80	140
Scophthalmus maximus	Turbot	29.4	76	170	470
Scophthalmus rhombus	Brill	1.8	5	270	320
Solea solea	Sole	0.4	2	250	280
Sprattus sprattus	Sprat	18.7	1752	75	155
Trachurus trachurus	Horse mackerel	0.4	34	100	130
Zoarces viviparus	Eelpout	0.3	4	180	290

Area 25


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.4	13	110	190
Alosa fallax	Twaite shad	0.1	5	150	165
Anguilla anguilla	Eel	0.1	1
Caridea	Shrimps	0.0	1
Clupea harengus	Herring	10738.9	302769	90	290
Cyclopterus lumpus	Lumpfish	3.4	11	95	200
Enchelyopus cimbrius	Four-bearded rockling	2.4	61	100	310
Engraulis encrasicolus	Anchovy	0.0	1	90	90
Gadus morhua	Cod	2487.3	11878	50	560
Gasterosteus aculeatus	Three-spined stickleback	0.0	2
Hyperoplus lanceolatus	Greater sandeel	0.1	2	230	295
Limanda limanda	Common dab	0.6	12	130	220
Merlangius merlangus	Whiting	70.4	408	160	410
Myoxocephalus scorpius	Sculpin	106.6	628	130	310
Mytilus edulis	Blue mussel	212.0	59
Platichthys flesus	Flounder	403.9	1934	110	380
Pleuronectes platessa	Plaice	273.8	1624	130	400
Pomatoschistus spp.	Sand gobies	0.0	4
Saduria entomon	Saduria	2.2	978
Scomber scombrus	Mackerel	0.8	1	470	470
Scophthalmus maximus	Turbot	18.1	40	200	420
Scyphozoa	Scyphozoans	42.4	0
Sprattus sprattus	Sprat	9773.2	741607	65	155
Zoarces viviparus	Eelpout	0.1	1	270	270

Danish Baltic International Trawl Survey

Period

Quarter 1

Activity

Trawl Stations

Bongo Stations

CTD Stations

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

CPUE

CPUE for Selected Species

Cod

Plaice

Sole

Sprat

Herring

Biodiversity

Length Distributions

Sprat

Herring

Common dab

Flounder

Whiting

Cod

Plaice

Grey gurnard

Hake

Horse mackerel

All Species Caught

Area 20

Area 21

Area 22

Area 23

Area 24

Area 25

Area 26

Quarter 4

Activity

Trawl Stations

Bongo Stations

CTD Stations

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

CPUE

CPUE for Selected Species

Cod

Plaice

Sole

Sprat

Herring

Biodiversity

Length Distributions

Sprat

Herring

Common dab

Whiting

Norway pout

Plaice

Horse mackerel

Cod

Haddock

Flounder

All Species Caught

Area 20

Area 21

Area 22

Area 23

Area 24

Area 25