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	44942.5	1560598
Sprat	10935.8	1041149	50	160
Herring	10257.2	309925	70	295
Cod	9831.5	28383	90	870
Plaice	2246.6	31417	30	450
Sole	25.3	147	90	410

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

Plaice

Cod

Flounder

Whiting

Haddock

Grey gurnard

Norway pout

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)
Alloteuthis subulata	European common squid	0.0	3
Arnoglossus laterna	Scaldfish	0.1	11	80	140
Buglossidium luteum	Solenette	0.0	1	100	100
Callionymus lyra	Common dragonet	3.1	95	100	230
Callionymus maculatus	Spotted dragonet	0.1	5	90	140
Cancer pagurus	Edible crab	0.2	1
Clupea harengus	Herring	98.3	3136	85	200
Eutrigla gurnardus	Grey gurnard	0.1	5	90	170
Gadus morhua	Cod	17.8	74	110	800
Glyptocephalus cynoglossus	Witch	0.4	3	190	350
Hippoglossoides platessoides	American plaice	3.6	113	110	280
Limanda limanda	Common dab	38.7	445	100	280
Lumpenus lampretaeformis	Snake blenny	0.1	5	190	220
Melanogrammus aeglefinus	Haddock	1.3	17	150	340
Merlangius merlangus	Whiting	110.8	1766	90	280
Merluccius merluccius	Hake	0.6	2	340	360
Microstomus kitt	Lemon sole	1.5	39	110	230
Nephrops norvegicus	Norway lobster	4.2	75
Platichthys flesus	Flounder	9.1	47	140	320
Pleuronectes platessa	Plaice	16.3	246	90	340
Pomatoschistus spp.	Sand gobies	0.0	1	90	90
Scophthalmus rhombus	Brill	3.0	3	320	430
Solea solea	Sole	0.2	1	260	260
Spinachia spinachia	Ten spined stickleback	0.0	1	340	340
Sprattus sprattus	Sprat	0.7	76	70	140
Trachinus draco	Greater weever fish	0.1	1	260	260
Trisopterus esmarkii	Norway pout	4.3	459	80	130
Trisopterus minutus	Poor-cod	0.0	3	120	120

Area 21


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.1	2	150	160
Alloteuthis subulata	European common squid	1.5	220	70	110
Amblyraja radiata	Starry ray	0.9	2	280	470
Ammodytes marinus	Lesser sandeel	1.2	90	150	210
Argentina sphyraena	Lesser silver smelt	0.0	2	90	90
Arnoglossus laterna	Scaldfish	0.6	58	60	140
Buglossidium luteum	Solenette	0.0	4	90	100
Callionymus lyra	Common dragonet	10.0	716	60	250
Callionymus maculatus	Spotted dragonet	3.7	407	90	170
Cancer pagurus	Edible crab	4.0	10
Chelidonichthys lucerna	Tub gurnard	1.6	9	230	320
Clupea harengus	Herring	1174.2	53688	85	280
Crangon crangon	Common shrimp	0.2	4
Ctenolabrus rupestris	Goldsinny	0.0	1	120	120
Cyclopterus lumpus	Lumpfish	3.4	1	430	430
Enchelyopus cimbrius	Four-bearded rockling	1.2	54	120	230
Engraulis encrasicolus	Anchovy	0.3	28	110	150
Eutrigla gurnardus	Grey gurnard	68.1	915	80	390
Gadus morhua	Cod	130.8	308	100	800
Glyptocephalus cynoglossus	Witch	1.6	26	130	320
Hippoglossoides platessoides	American plaice	72.9	3621	50	280
Hyperoplus lanceolatus	Greater sandeel	15.6	1293	150	210
Limanda limanda	Common dab	1108.4	25993	60	320
Loliginidae		0.0	1
Lophius piscatorius	Angler fish	0.2	1	220	220
Lumpenus lampretaeformis	Snake blenny	1.9	131	140	320
Lycodes gracilis	Vahls eelpout	0.2	14	110	210
Maurolicus muelleri	Pearlside	0.0	1	60	60
Melanogrammus aeglefinus	Haddock	71.7	1227	110	500
Merlangius merlangus	Whiting	809.9	20660	80	290
Merluccius merluccius	Hake	8.2	84	100	450
Micromesistius poutassou	Blue whiting	0.0	1	170	170
Microstomus kitt	Lemon sole	7.5	94	100	340
Molva molva	Ling	0.7	1	520	520
Mullus surmuletus	Striped red mullet	0.2	4	120	230
Myoxocephalus scorpius	Sculpin	10.2	101	100	270
Myxine glutinosa	Hagfish	0.1	2	270	290
Nephrops norvegicus	Norway lobster	129.3	3956
Pandalus borealis	Northern pink shrimp	3.5	5
Petromyzon marinus	Sea lamprey	0.0	1	220	220
Pholis gunnellus	Butter fish	0.1	5	140	200
Platichthys flesus	Flounder	319.7	1606	110	430
Pleuronectes platessa	Plaice	807.7	11389	90	430
Pomatoschistus spp.	Sand gobies	0.1	9	70	100
Raja clavata	Thornback ray	0.1	3	170	230
Sardina pilchardus	Pilchard	0.1	1	200	200
Scomber scombrus	Mackerel	0.1	1	220	220
Scophthalmus maximus	Turbot	12.8	18	220	420
Scophthalmus rhombus	Brill	22.3	45	230	480
Solea solea	Sole	7.3	40	110	380
Spinachia spinachia	Ten spined stickleback	0.0	2	140	440
Sprattus sprattus	Sprat	899.2	81927	65	155
Squalus acanthias	Spurdog	0.1	1	310	310
Syngnathidae	Pipefishes and seahorses	0.0	1	280	280
Todarodes sagittatus	European flying squid	0.0	1
Todaropsis eblanae	Lesser flying squid	0.7	4
Trachinus draco	Greater weever fish	41.5	454	110	390
Trachurus trachurus	Horse mackerel	17.5	98	90	400
Trisopterus esmarkii	Norway pout	6.3	536	80	160
Trisopterus minutus	Poor-cod	0.4	11	140	180
Zeugopterus punctatus	Topknot	0.0	1	70	70

Area 22


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.6	32	80	170
Alloteuthis subulata	European common squid	0.0	3	70	80
Amblyraja radiata	Starry ray	0.7	2	220	450
Ammodytes marinus	Lesser sandeel	0.2	16	155	205
Arctica islandica	Ocean quahaug	292.0	0
Arnoglossus laterna	Scaldfish	0.5	37	80	170
Buglossidium luteum	Solenette	0.0	3	60	110
Callionymus lyra	Common dragonet	2.4	67	90	230
Callionymus maculatus	Spotted dragonet	0.2	20	100	190
Cancer pagurus	Edible crab	1.1	2	118	172
Cerastoderma edule	Common cockle	118.1	0
Clupea harengus	Herring	318.9	17682	70	270
Ctenolabrus rupestris	Goldsinny	0.1	1	160	160
Cyclopterus lumpus	Lumpfish	8.8	3	180	470
Engraulis encrasicolus	Anchovy	0.1	5	110	120
Eutrigla gurnardus	Grey gurnard	9.8	157	140	350
Gadus morhua	Cod	96.9	560	100	870
Gasterosteus aculeatus	Three-spined stickleback	5.3	4433	40	70
Gobius niger	Black goby	0.0	2	70	90
Hippoglossoides platessoides	American plaice	10.0	220	90	300
Hyperoplus lanceolatus	Greater sandeel	0.0	3	170	175
Limanda limanda	Common dab	1756.9	43315	50	320
Loligo vulgaris	European squid	0.3	1	180	180
Lumpenus lampretaeformis	Snake blenny	0.3	25	110	270
Melanogrammus aeglefinus	Haddock	0.9	11	190	260
Merlangius merlangus	Whiting	105.3	1834	110	280
Merluccius merluccius	Hake	1.4	4	310	420
Microstomus kitt	Lemon sole	7.3	26	160	330
Mullus surmuletus	Striped red mullet	0.0	1	110	110
Myoxocephalus scorpius	Sculpin	45.5	547	90	280
Pholis gunnellus	Butter fish	0.2	14	140	200
Platichthys flesus	Flounder	223.8	882	120	450
Pleuronectes platessa	Plaice	849.3	15219	70	420
Pollachius virens	Saithe	0.0	1	170	170
Pomatoschistus spp.	Sand gobies	1.4	1001	30	130
Scomber scombrus	Mackerel	0.2	2	220	270
Scophthalmus maximus	Turbot	24.0	51	190	440
Scophthalmus rhombus	Brill	2.9	5	280	380
Solea solea	Sole	10.9	87	90	410
Spinachia spinachia	Ten spined stickleback	0.0	1	110	110
Sprattus sprattus	Sprat	1829.5	179464	50	150
Syngnathidae	Pipefishes and seahorses	0.0	7	90	120
Trachinus draco	Greater weever fish	0.1	3	160	180
Trachurus trachurus	Horse mackerel	0.0	1	120	120
Trisopterus esmarkii	Norway pout	0.0	1	120	120
Trisopterus minutus	Poor-cod	0.1	4	120	150
Zoarces viviparus	Eelpout	5.1	209	120	250

Area 23


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.0	1	150	150
Alloteuthis subulata	European common squid	0.4	40
Amblyraja radiata	Starry ray	1.4	2	460	500
Arnoglossus laterna	Scaldfish	0.2	9	100	150
Callionymus lyra	Common dragonet	0.0	2	90	100
Callionymus maculatus	Spotted dragonet	0.0	2	110	130
Clupea harengus	Herring	157.5	5195	100	260
Cyclopterus lumpus	Lumpfish	5.2	3	290	440
Eutrigla gurnardus	Grey gurnard	1.3	8	160	330
Gadus morhua	Cod	3333.7	6106	130	670
Hippoglossoides platessoides	American plaice	0.3	5	190	220
Limanda limanda	Common dab	244.0	2172	100	320
Melanogrammus aeglefinus	Haddock	0.4	2	170	330
Merlangius merlangus	Whiting	54.1	561	100	340
Merluccius merluccius	Hake	1.5	3	300	460
Microstomus kitt	Lemon sole	0.5	3	210	290
Molva molva	Ling	0.7	1	490	490
Myoxocephalus scorpius	Sculpin	0.1	1	180	180
Petromyzon marinus	Sea lamprey	0.1	2	210	280
Platichthys flesus	Flounder	54.4	255	140	390
Pleuronectes platessa	Plaice	204.3	1123	110	450
Salmo trutta	Sea trout	1.0	2	380	400
Scophthalmus maximus	Turbot	3.2	3	290	410
Scophthalmus rhombus	Brill	27.5	55	250	480
Solea solea	Sole	6.7	18	180	410
Sprattus sprattus	Sprat	42.4	2533	75	160
Trachurus trachurus	Horse mackerel	0.0	2	100	110
Zoarces viviparus	Eelpout	0.1	1	240	240

Area 24


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.1	2	150	170
Clupea harengus	Herring	40.8	1461	90	270
Cyclopterus lumpus	Lumpfish	0.3	1	180	180
Gadus morhua	Cod	304.4	1340	120	560
Hyperoplus lanceolatus	Greater sandeel	0.2	11	160	190
Limanda limanda	Common dab	117.4	1489	90	310
Merlangius merlangus	Whiting	32.0	134	140	420
Myoxocephalus scorpius	Sculpin	7.1	50	130	290
Mytilus edulis	Blue mussel	635.5	0
Platichthys flesus	Flounder	80.6	535	150	390
Pleuronectes platessa	Plaice	192.0	1695	120	410
Pollachius virens	Saithe	0.1	1	210	210
Pomatoschistus spp.	Sand gobies	0.0	1	70	70
Scophthalmus maximus	Turbot	14.6	33	200	400
Scophthalmus rhombus	Brill	0.3	1	270	270
Solea solea	Sole	0.1	1	230	230
Spinachia spinachia	Ten spined stickleback	0.0	1	160	160
Sprattus sprattus	Sprat	14.4	1119	65	160
Zoarces viviparus	Eelpout	0.2	2	230	350

Area 25


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.0	1	110	110
Alosa fallax	Twaite shad	1.6	13	160	180
Ammodytes marinus	Lesser sandeel	0.0	1	140	140
Aphia minuta	Transparent goby	0.0	1	40	40
Clupea harengus	Herring	8467.5	228763	80	295
Cyclopterus lumpus	Lumpfish	2.5	9	150	180
Enchelyopus cimbrius	Four-bearded rockling	28.4	396	40	310
Engraulis encrasicolus	Anchovy	0.0	1	110	110
Gadus morhua	Cod	5948.0	19994	90	620
Gasterosteus aculeatus	Three-spined stickleback	1.8	1100	30	70
Hyperoplus lanceolatus	Greater sandeel	8.8	543	110	210
Limanda limanda	Common dab	0.9	8	170	250
Melanogrammus aeglefinus	Haddock	0.4	4	220	220
Merlangius merlangus	Whiting	34.7	152	210	410
Myoxocephalus scorpius	Sculpin	155.6	964	130	300
Mytilus edulis	Blue mussel	20.0	0
Platichthys flesus	Flounder	4519.8	22138	160	400
Pleuronectes platessa	Plaice	176.9	1745	30	380
Pomatoschistus spp.	Sand gobies	0.0	8	40	40
Saduria entomon	Saduria	0.4	204
Scomber scombrus	Mackerel	5.5	9	300	450
Scophthalmus maximus	Turbot	13.4	37	200	390
Sprattus sprattus	Sprat	8149.6	776030	70	155
Trachurus trachurus	Horse mackerel	0.1	3	100	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	40553.3	1294015
Herring	12600.2	423127	65	300
Sprat	7715.8	624170	55	190
Cod	6144.1	22606	40	750
Plaice	2174.4	26119	60	480
Sole	47.7	332	90	490

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

Plaice

Cod

Norway pout

Flounder

Horse mackerel

Grey gurnard

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)
Anguilla anguilla	Eel	0.8	2	610	650
Arnoglossus laterna	Scaldfish	0.1	8	110	140
Buglossidium luteum	Solenette	0.0	2	90	110
Callionymus lyra	Common dragonet	6.5	152	110	240
Callionymus maculatus	Spotted dragonet	0.0	4	110	130
Clupea harengus	Herring	6.3	162	135	285
Enchelyopus cimbrius	Four-bearded rockling	0.3	4	240	260
Eutrigla gurnardus	Grey gurnard	1.5	29	70	250
Gadus morhua	Cod	18.9	649	100	480
Glyptocephalus cynoglossus	Witch	0.1	1	210	210
Hippoglossoides platessoides	American plaice	1.3	19	140	260
Limanda limanda	Common dab	38.1	360	130	290
Loligo forbesii	Northern squid	0.8	405
Melanogrammus aeglefinus	Haddock	0.3	3	160	280
Merlangius merlangus	Whiting	107.6	3568	50	250
Merluccius merluccius	Hake	2.2	7	240	430
Microstomus kitt	Lemon sole	0.8	15	130	200
Nephrops norvegicus	Norway lobster	5.6	197
Pleuronectes platessa	Plaice	30.9	293	140	370
Pollachius virens	Saithe	0.2	1	270	270
Pomatoschistus spp.	Sand gobies	0.0	2	90	90
Scomber scombrus	Mackerel	0.4	2	260	310
Scyliorhinus canicula	Lesser-spotted dogfish	0.6	1	550	550
Solea solea	Sole	0.2	1	280	280
Squalus acanthias	Spurdog	78.2	50	660	980
Trisopterus esmarkii	Norway pout	5.3	576	60	150

Area 21


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.6	32	100	170
Amblyraja radiata	Starry ray	1.2	4	170	380
Arctica islandica	Ocean quahaug	62.2	0
Arnoglossus laterna	Scaldfish	2.7	312	60	150
Buglossidium luteum	Solenette	0.1	13	80	110
Callionymus lyra	Common dragonet	19.4	1318	70	240
Callionymus maculatus	Spotted dragonet	6.7	856	80	160
Cancer pagurus	Edible crab	52.7	91
Cephalopoda	Squids and octopusses	0.0	2
Chelidonichthys lucerna	Tub gurnard	2.1	9	230	370
Clupea harengus	Herring	488.4	31030	80	280
Enchelyopus cimbrius	Four-bearded rockling	0.3	11	150	200
Engraulis encrasicolus	Anchovy	194.7	15117	70	150
Eutrigla gurnardus	Grey gurnard	26.9	572	70	320
Gadus morhua	Cod	28.8	550	70	520
Glyptocephalus cynoglossus	Witch	0.8	9	190	320
Gobius niger	Black goby	0.1	6	80	120
Hippoglossoides platessoides	American plaice	78.4	4370	50	260
Homarus gammarus	European lobster	0.6	1	100	100
Labrus bergylta	Ballan wrasse	0.2	7	110	140
Limanda limanda	Common dab	1252.7	29163	50	310
Loligo forbesii	Northern squid	8.9	1568
Lophius piscatorius	Angler fish	0.8	1	380	380
Lumpenus lampretaeformis	Snake blenny	0.3	28	150	290
Melanogrammus aeglefinus	Haddock	13.4	332	120	220
Merlangius merlangus	Whiting	531.6	19246	50	300
Merluccius merluccius	Hake	13.4	105	160	450
Microstomus kitt	Lemon sole	9.9	133	130	280
Molva molva	Ling	0.0	1	200	200
Mullus surmuletus	Striped red mullet	0.2	10	90	200
Myoxocephalus scorpius	Sculpin	7.7	62	140	290
Nephrops norvegicus	Norway lobster	22.3	775
Pandalus borealis	Northern pink shrimp	15.2	0
Pholis gunnellus	Butter fish	0.2	8	120	220
Platichthys flesus	Flounder	48.9	226	130	400
Pleuronectes platessa	Plaice	296.7	3484	70	430
Pollachius virens	Saithe	0.5	7	160	220
Pomatoschistus spp.	Sand gobies	0.2	23	80	100
Scomber scombrus	Mackerel	32.9	213	130	390
Scophthalmus maximus	Turbot	2.8	6	250	320
Scophthalmus rhombus	Brill	10.1	26	170	410
Solea solea	Sole	14.2	105	90	380
Sprattus sprattus	Sprat	766.1	58845	80	155
Squalus acanthias	Spurdog	320.7	117	650	1060
Trachinus draco	Greater weever fish	1036.0	15456	110	350
Trachurus trachurus	Horse mackerel	3.5	396	60	340
Trisopterus esmarkii	Norway pout	62.5	7435	70	170
Zeus faber	John dory	0.6	1	330	330
Zoarces viviparus	Eelpout	0.1	1	290	290

Area 22


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.7	34	100	170
Amblyraja radiata	Starry ray	0.9	3	110	420
Ammodytes marinus	Lesser sandeel	16.1	920	140	210
Arnoglossus laterna	Scaldfish	0.8	74	70	160
Buglossidium luteum	Solenette	0.0	1	120	120
Callionymus lyra	Common dragonet	1.9	48	120	230
Cancer pagurus	Edible crab	1.0	2
Chelidonichthys lucerna	Tub gurnard	0.6	3	230	290
Clupea harengus	Herring	134.8	7443	65	245
Ctenolabrus rupestris	Goldsinny	0.0	3	80	100
Enchelyopus cimbrius	Four-bearded rockling	0.4	9	160	230
Engraulis encrasicolus	Anchovy	47.0	4039	70	170
Eutrigla gurnardus	Grey gurnard	11.6	192	100	320
Gadus morhua	Cod	56.0	1893	60	750
Gasterosteus aculeatus	Three-spined stickleback	0.0	4	50	60
Glyptocephalus cynoglossus	Witch	0.1	1	230	230
Gobius niger	Black goby	0.3	29	70	130
Hippoglossoides platessoides	American plaice	10.0	248	80	330
Homarus gammarus	European lobster	0.4	3	60	65
Hyperoplus lanceolatus	Greater sandeel	1.5	67	150	300
Labrus bergylta	Ballan wrasse	0.1	10	80	120
Limanda limanda	Common dab	2200.4	53600	50	340
Lumpenus lampretaeformis	Snake blenny	0.3	25	90	280
Melanogrammus aeglefinus	Haddock	0.6	14	140	180
Merlangius merlangus	Whiting	172.5	6941	60	300
Microstomus kitt	Lemon sole	0.6	4	180	290
Mullus surmuletus	Striped red mullet	0.6	23	90	210
Mustelus asterias	Starry smooth-hound	0.5	1	510	510
Myoxocephalus scorpius	Sculpin	16.1	188	120	270
Neogobius melanostomus	Round goby	0.4	20	80	150
Pholis gunnellus	Butter fish	0.2	8	150	180
Platichthys flesus	Flounder	96.1	502	110	440
Pleuronectes platessa	Plaice	998.8	16272	80	400
Pomatoschistus spp.	Sand gobies	1.9	219	50	130
Sardina pilchardus	Pilchard	0.0	2	90	120
Scomber scombrus	Mackerel	8.9	65	180	360
Scophthalmus maximus	Turbot	19.0	40	180	460
Scophthalmus rhombus	Brill	10.0	49	130	430
Solea solea	Sole	24.3	179	90	400
Sprattus sprattus	Sprat	1117.5	79456	55	155
Symphodus melops	Corkwing	0.1	1	150	150
Trachinus draco	Greater weever fish	137.4	2616	120	350
Trachurus trachurus	Horse mackerel	13.0	1323	60	130
Trisopterus esmarkii	Norway pout	0.0	1	50	50
Trisopterus luscus	Bib	0.1	4	150	170
Zoarces viviparus	Eelpout	1.1	37	80	280

Area 23


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.0	1	140	140
Amblyraja radiata	Starry ray	1.3	2	450	470
Arnoglossus laterna	Scaldfish	0.3	23	90	140
Buglossidium luteum	Solenette	0.0	1	90	90
Callionymus lyra	Common dragonet	0.2	15	90	200
Callionymus maculatus	Spotted dragonet	0.0	1	100	100
Cancer pagurus	Edible crab	1.7	3
Chelidonichthys lucerna	Tub gurnard	0.5	3	230	270
Clupea harengus	Herring	205.4	8906	100	275
Engraulis encrasicolus	Anchovy	0.3	18	80	170
Eutrigla gurnardus	Grey gurnard	7.4	78	110	330
Gadus morhua	Cod	2288.0	2635	80	740
Gobius niger	Black goby	0.0	3	80	100
Hippoglossoides platessoides	American plaice	8.2	143	110	320
Hyperoplus lanceolatus	Greater sandeel	0.0	1	175	175
Limanda limanda	Common dab	767.0	9272	60	320
Merlangius merlangus	Whiting	27.3	547	70	320
Merluccius merluccius	Hake	0.5	1	410	410
Myoxocephalus scorpius	Sculpin	0.3	2	190	250
Mytilus edulis	Blue mussel	1000.0	0
Platichthys flesus	Flounder	159.6	630	150	410
Pleuronectes platessa	Plaice	308.2	1485	90	440
Pomatoschistus spp.	Sand gobies	0.3	14	80	140
Scophthalmus maximus	Turbot	1.8	3	230	390
Scophthalmus rhombus	Brill	7.8	10	190	480
Solea solea	Sole	8.1	41	180	490
Sprattus sprattus	Sprat	106.0	7258	75	160
Trachinus draco	Greater weever fish	0.8	15	130	230
Trachurus trachurus	Horse mackerel	1.1	184	70	120
Zoarces viviparus	Eelpout	0.0	2	140	210

Area 24


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.2	8	110	160
Alosa fallax	Twaite shad	0.0	1	150	150
Clupea harengus	Herring	75.4	4387	85	225
Enchelyopus cimbrius	Four-bearded rockling	0.1	1	250	250
Engraulis encrasicolus	Anchovy	0.6	74	80	170
Gadus morhua	Cod	34.3	835	70	620
Gobius niger	Black goby	0.0	1	80	80
Hyperoplus lanceolatus	Greater sandeel	0.2	14	170	220
Limanda limanda	Common dab	332.6	4983	80	300
Merlangius merlangus	Whiting	30.7	1463	60	280
Myoxocephalus scorpius	Sculpin	5.3	48	100	270
Mytilus edulis	Blue mussel	1529.6	0
Platichthys flesus	Flounder	259.8	1268	140	380
Pleuronectes platessa	Plaice	320.1	2997	60	480
Pomatoschistus spp.	Sand gobies	0.1	11	60	160
Scophthalmus maximus	Turbot	24.1	61	110	420
Solea solea	Sole	0.9	6	200	290
Sprattus sprattus	Sprat	39.4	4642	65	180
Trachinus draco	Greater weever fish	0.1	1	200	200
Trachurus trachurus	Horse mackerel	0.0	2	120	130
Zoarces viviparus	Eelpout	1.2	10	230	360

Area 25


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.1	4	150	170
Alosa fallax	Twaite shad	9.2	272	120	320
Anguilla anguilla	Eel	0.7	1	680	680
Clupea harengus	Herring	11689.8	371199	105	300
Cyclopterus lumpus	Lumpfish	0.7	1	200	200
Enchelyopus cimbrius	Four-bearded rockling	13.4	236	110	320
Engraulis encrasicolus	Anchovy	1.1	70	120	150
Gadus morhua	Cod	3717.9	16044	40	550
Gasterosteus aculeatus	Three-spined stickleback	0.0	7	20	70
Hyperoplus lanceolatus	Greater sandeel	4.2	78	155	280
Limanda limanda	Common dab	0.3	3	170	240
Lumpenus lampretaeformis	Snake blenny	0.0	1	290	290
Melanogrammus aeglefinus	Haddock	0.6	2	260	360
Merlangius merlangus	Whiting	14.7	80	80	370
Merluccius merluccius	Hake	1.1	1	590	590
Myoxocephalus scorpius	Sculpin	151.1	723	120	320
Mytilus edulis	Blue mussel	32.6	0
Platichthys flesus	Flounder	563.2	2247	140	430
Pleuronectes platessa	Plaice	219.8	1588	160	380
Pomatoschistus spp.	Sand gobies	0.1	43
Saduria entomon	Saduria	0.4	104
Scomber scombrus	Mackerel	2.3	4	380	410
Scophthalmus maximus	Turbot	5.8	14	210	410
Scyphozoa	Scyphozoans	29.2	0
Sprattus sprattus	Sprat	5686.7	473969	70	190
Trachurus trachurus	Horse mackerel	0.0	1	110	110
Zoarces viviparus	Eelpout	0.1	1	280	280

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

Plaice

Cod

Flounder

Whiting

Haddock

Grey gurnard

Norway pout

All Species Caught

Area 20

Area 21

Area 22

Area 23

Area 24

Area 25

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

Plaice

Cod

Norway pout

Flounder

Horse mackerel

Grey gurnard

All Species Caught

Area 20

Area 21

Area 22

Area 23

Area 24

Area 25