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	64450.8	2223452
Sprat	17286.1	1440478	50	170
Herring	15724.2	443877	45	300
Cod	8740.9	45593	60	860
Plaice	4716.9	80395	50	460
Sole	14.9	117	120	380

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

Flounder

Cod

Whiting

Haddock

Grey gurnard

Hake

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	150
Buglossidium luteum	Solenette	0.0	1	110	110
Callionymus lyra	Common dragonet	2.6	115	100	230
Callionymus maculatus	Spotted dragonet	0.1	5	110	140
Clupea harengus	Herring	147.7	4855	100	255
Eutrigla gurnardus	Grey gurnard	1.2	58	80	260
Gadus morhua	Cod	0.9	18	130	250
Hippoglossoides platessoides	American plaice	36.7	1721	90	190
Limanda limanda	Common dab	28.5	603	70	280
Lumpenus lampretaeformis	Snake blenny	0.3	17	210	270
Melanogrammus aeglefinus	Haddock	12.6	117	170	290
Merlangius merlangus	Whiting	26.9	480	100	300
Merluccius merluccius	Hake	0.4	14	100	220
Microstomus kitt	Lemon sole	0.8	8	130	280
Myoxocephalus scorpius	Sculpin	0.2	2	180	190
Nephrops norvegicus	Norway lobster	15.9	427
Ommastrephidae		0.1	2	80	90
Platichthys flesus	Flounder	1.5	7	230	310
Pleuronectes platessa	Plaice	36.3	657	110	270
Trachinus draco	Greater weever fish	0.1	1	210	210
Trisopterus esmarkii	Norway pout	0.7	70	90	140

Area 21


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.1	8	130	160
Alloteuthis subulata	European common squid	0.4	76
Amblyraja radiata	Starry ray	0.6	1	430	430
Ammodytes marinus	Lesser sandeel	0.1	13	120	190
Argentina sphyraena	Lesser silver smelt	0.1	10	60	150
Arnoglossus laterna	Scaldfish	2.2	222	60	140
Buglossidium luteum	Solenette	0.1	10	80	110
Callionymus lyra	Common dragonet	13.7	568	70	250
Callionymus maculatus	Spotted dragonet	2.6	255	70	170
Cancer pagurus	Edible crab	6.1	10	130	180
Chelidonichthys lucerna	Tub gurnard	2.8	9	250	420
Clupea harengus	Herring	3625.3	117026	80	280
Crangon crangon	Common shrimp	0.0	12
Cyclopterus lumpus	Lumpfish	2.2	2	200	360
Echiichthys vipera	Lesser weever	0.0	1	80	80
Enchelyopus cimbrius	Four-bearded rockling	0.1	7	150	180
Engraulis encrasicolus	Anchovy	0.3	29	100	150
Entelurus aequoreus	Snake pipefish	0.2	8	370	520
Eutrigla gurnardus	Grey gurnard	49.3	1129	70	330
Gadus morhua	Cod	97.0	820	110	680
Gasterosteus aculeatus	Three-spined stickleback	0.1	43	30	60
Glyptocephalus cynoglossus	Witch	1.4	16	180	280
Gobius niger	Black goby	0.1	15	80	100
Hippoglossoides platessoides	American plaice	188.4	11811	60	290
Hyperoplus lanceolatus	Greater sandeel	0.2	19	135	205
Labrus bergylta	Ballan wrasse	0.1	1	150	150
Limanda limanda	Common dab	1723.9	44623	80	300
Lumpenus lampretaeformis	Snake blenny	5.4	397	130	280
Lycodes gracilis	Vahls eelpout	0.0	1	170	170
Melanogrammus aeglefinus	Haddock	275.8	1919	150	310
Merlangius merlangus	Whiting	1327.2	20584	70	350
Merluccius merluccius	Hake	6.6	183	90	480
Microstomus kitt	Lemon sole	4.1	43	120	320
Molva molva	Ling	3.0	2	230	750
Mullus surmuletus	Striped red mullet	0.2	6	130	140
Myoxocephalus scorpius	Sculpin	28.6	328	100	270
Myxine glutinosa	Hagfish	0.1	2	320	330
Nephrops norvegicus	Norway lobster	69.3	2415	47	60
Ommastrephidae		0.1	4	50	110
Pandalus borealis	Northern pink shrimp	14.1	282
Pholis gunnellus	Butter fish	0.3	16	150	200
Platichthys flesus	Flounder	586.7	3189	80	390
Pleuronectes platessa	Plaice	630.7	11128	80	460
Pollachius virens	Saithe	0.2	1	290	290
Pomatoschistus spp.	Sand gobies	0.0	9	40	100
Scomber scombrus	Mackerel	1.0	10	210	280
Scophthalmus maximus	Turbot	1.6	4	210	340
Scophthalmus rhombus	Brill	18.5	38	150	530
Solea solea	Sole	5.0	35	150	350
Sprattus sprattus	Sprat	2796.1	251413	50	155
Squalus acanthias	Spurdog	8.6	7	210	790
Symphodus melops	Corkwing	0.0	1	80	80
Syngnathidae	Pipefishes and seahorses	0.1	3	270	370
Trachinus draco	Greater weever fish	33.9	478	100	340
Trachurus trachurus	Horse mackerel	1.0	41	110	330
Trisopterus esmarkii	Norway pout	0.4	35	90	150
Trisopterus minutus	Poor-cod	0.2	5	160	180
Zoarces viviparus	Eelpout	0.0	1	200	200

Area 22


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.3	20	80	150
Ammodytes marinus	Lesser sandeel	0.0	3	120	185
Arctica islandica	Ocean quahaug	41.4	0
Arnoglossus laterna	Scaldfish	0.5	46	70	150
Buglossidium luteum	Solenette	0.1	8	70	110
Callionymus lyra	Common dragonet	2.1	52	100	220
Callionymus maculatus	Spotted dragonet	0.0	5	80	130
Clupea harengus	Herring	612.0	50553	70	285
Ctenolabrus rupestris	Goldsinny	0.1	4	110	150
Enchelyopus cimbrius	Four-bearded rockling	0.9	24	140	240
Entelurus aequoreus	Snake pipefish	0.1	3	370	430
Eutrigla gurnardus	Grey gurnard	8.5	125	100	300
Gadus morhua	Cod	59.6	614	90	860
Gasterosteus aculeatus	Three-spined stickleback	2.7	1204	40	70
Glyptocephalus cynoglossus	Witch	0.2	1	290	290
Gobius niger	Black goby	0.1	6	80	110
Hippoglossoides platessoides	American plaice	28.3	846	70	280
Hyperoplus lanceolatus	Greater sandeel	0.5	39	115	210
Limanda limanda	Common dab	2236.0	53398	60	340
Lumpenus lampretaeformis	Snake blenny	3.7	418	120	260
Melanogrammus aeglefinus	Haddock	27.3	202	180	280
Merlangius merlangus	Whiting	90.8	1748	100	340
Merluccius merluccius	Hake	0.7	12	80	300
Microstomus kitt	Lemon sole	1.1	5	250	280
Myoxocephalus scorpius	Sculpin	38.7	470	80	260
Neogobius melanostomus	Round goby	0.0	1	120	120
Osmerus eperlanus	European smelt	0.0	1	180	180
Pholis gunnellus	Butter fish	0.3	18	120	180
Platichthys flesus	Flounder	532.8	2772	90	450
Pleuronectes platessa	Plaice	3096.5	58042	50	370
Pomatoschistus spp.	Sand gobies	0.0	8	50	80
Raniceps raninus	Lesser forkbeard	0.0	1	110	110
Sardina pilchardus	Pilchard	0.5	38	120	130
Scomber scombrus	Mackerel	0.2	1	270	270
Scophthalmus maximus	Turbot	12.3	25	180	460
Scophthalmus rhombus	Brill	3.3	10	180	380
Scyphozoa	Scyphozoans	40.9	0
Solea solea	Sole	9.5	80	120	380
Sprattus sprattus	Sprat	807.0	85310	65	155
Symphodus melops	Corkwing	0.0	1	80	80
Syngnathidae	Pipefishes and seahorses	0.1	5	200	400
Trachinus draco	Greater weever fish	0.7	8	150	310
Trisopterus esmarkii	Norway pout	0.2	6	110	180
Zoarces viviparus	Eelpout	5.3	170	110	270

Area 23


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.0	1	170	170
Arnoglossus laterna	Scaldfish	0.1	3	120	140
Buglossidium luteum	Solenette	0.0	1	90	90
Callionymus lyra	Common dragonet	0.1	3	90	200
Callionymus maculatus	Spotted dragonet	0.0	4	120	130
Clupea harengus	Herring	270.6	5942	90	300
Eutrigla gurnardus	Grey gurnard	1.7	11	100	320
Gadus morhua	Cod	1498.0	6521	120	570
Gasterosteus aculeatus	Three-spined stickleback	0.0	1	50	50
Hippoglossoides platessoides	American plaice	1.6	68	100	310
Limanda limanda	Common dab	569.7	7695	90	310
Lumpenus lampretaeformis	Snake blenny	0.1	5	210	270
Melanogrammus aeglefinus	Haddock	4.5	22	190	490
Merlangius merlangus	Whiting	31.3	368	90	320
Merluccius merluccius	Hake	0.0	1	120	120
Microstomus kitt	Lemon sole	0.3	1	310	310
Myoxocephalus scorpius	Sculpin	3.7	22	150	300
Mytilus edulis	Blue mussel	549.0	0
Platichthys flesus	Flounder	91.3	378	110	440
Pleuronectes platessa	Plaice	497.9	4862	100	400
Pomatoschistus spp.	Sand gobies	0.0	6	50	100
Scophthalmus maximus	Turbot	0.7	2	250	270
Scophthalmus rhombus	Brill	3.6	12	190	370
Solea solea	Sole	0.4	2	120	350
Sprattus sprattus	Sprat	193.0	10504	70	170
Symphodus melops	Corkwing	0.0	1	70	70
Syngnathidae	Pipefishes and seahorses	0.0	6	200	450
Trachurus trachurus	Horse mackerel	0.3	1	340	340
Zoarces viviparus	Eelpout	0.7	21	150	250

Area 24


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.2	9	100	180
Ammodytes tobianus	Sandeel	0.0	1	180	180
Clupea harengus	Herring	227.5	9288	80	300
Cyclopterus lumpus	Lumpfish	0.6	3	110	180
Gadus morhua	Cod	114.1	1031	100	370
Gasterosteus aculeatus	Three-spined stickleback	0.0	1	60	60
Hyperoplus lanceolatus	Greater sandeel	0.0	3	170	200
Limanda limanda	Common dab	173.8	2269	100	320
Lumpenus lampretaeformis	Snake blenny	0.2	15	130	290
Melanogrammus aeglefinus	Haddock	0.2	1	270	270
Merlangius merlangus	Whiting	13.8	70	130	360
Myoxocephalus scorpius	Sculpin	4.0	55	130	210
Mytilus edulis	Blue mussel	55.6	0
Platichthys flesus	Flounder	97.6	513	130	370
Pleuronectes platessa	Plaice	266.0	4033	50	360
Scophthalmus maximus	Turbot	5.2	13	220	370
Scophthalmus rhombus	Brill	0.1	1	200	200
Sprattus sprattus	Sprat	17.7	2112	75	155
Zoarces viviparus	Eelpout	1.2	23	110	310

Area 25


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.1	2	160	160
Alosa fallax	Twaite shad	42.6	185	280	390
Clupea harengus	Herring	10707.6	252562	75	290
Cyclopterus lumpus	Lumpfish	1.9	9	140	210
Enchelyopus cimbrius	Four-bearded rockling	26.6	411	100	310
Engraulis encrasicolus	Anchovy	1.4	96	100	160
Eutrigla gurnardus	Grey gurnard	0.1	1	220	220
Gadus morhua	Cod	6928.8	36315	60	650
Gasterosteus aculeatus	Three-spined stickleback	9.0	4092	20	70
Gobiidae	True gobies	0.0	2	30	30
Hyperoplus lanceolatus	Greater sandeel	0.1	7	165	190
Limanda limanda	Common dab	1.2	17	150	220
Lumpenus lampretaeformis	Snake blenny	0.0	1	300	300
Melanogrammus aeglefinus	Haddock	0.2	1	290	290
Merlangius merlangus	Whiting	15.4	134	140	350
Myoxocephalus scorpius	Sculpin	75.0	353	100	290
Platichthys flesus	Flounder	8290.9	40107	160	400
Pleuronectes platessa	Plaice	189.0	1667	130	370
Pomatoschistus spp.	Sand gobies	0.0	6	50	50
Saduria entomon	Saduria	0.6	295
Scomber scombrus	Mackerel	40.8	148	230	440
Scophthalmus maximus	Turbot	7.7	20	200	390
Sprattus sprattus	Sprat	13233.9	1061583	70	150
Trachurus trachurus	Horse mackerel	0.0	2	140	140
Zoarces viviparus	Eelpout	0.0	1	210	210

Area 26


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Alosa fallax	Twaite shad	4.8	21	260	330
Aphia minuta	Transparent goby	0.0	2	30	40
Clupea harengus	Herring	133.5	3651	45	260
Cyclopterus lumpus	Lumpfish	1.0	5	140	170
Enchelyopus cimbrius	Four-bearded rockling	0.0	3	30	40
Engraulis encrasicolus	Anchovy	0.0	1	110	110
Gadus morhua	Cod	42.6	273	60	410
Gasterosteus aculeatus	Three-spined stickleback	0.5	218	40	70
Myoxocephalus scorpius	Sculpin	108.6	606	100	320
Platichthys flesus	Flounder	136.4	341	180	330
Pleuronectes platessa	Plaice	0.5	6	180	230
Saduria entomon	Saduria	0.1	28
Scophthalmus maximus	Turbot	0.1	1	180	180
Sprattus sprattus	Sprat	238.3	29555	70	145
Zoarces viviparus	Eelpout	0.2	2	280	280

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	37513.8	941793
Herring	13414.0	313410	65	300
Cod	4525.0	35509	30	830
Plaice	4134.7	65419	50	390
Sprat	2740.8	217572	55	185
Sole	42.4	303	90	380

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

Herring

Sprat

Common dab

Whiting

Plaice

Cod

Flounder

Horse mackerel

Grey gurnard

Haddock

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	0.5	34	80	150
Callionymus lyra	Common dragonet	42.6	2301	100	220
Cancer pagurus	Edible crab	1.4	2	155	170
Clupea harengus	Herring	82.7	10429	80	225
Eutrigla gurnardus	Grey gurnard	1.7	48	90	310
Gadus morhua	Cod	2.1	85	100	360
Hippoglossoides platessoides	American plaice	73.6	1711	80	290
Limanda limanda	Common dab	88.0	1051	70	290
Loliginidae		0.3	102	30	70
Loligo	Loligo sp	0.2	36	30	100
Melanogrammus aeglefinus	Haddock	4.0	77	120	310
Merlangius merlangus	Whiting	323.8	16187	80	310
Merluccius merluccius	Hake	11.0	46	160	400
Microstomus kitt	Lemon sole	0.8	13	130	210
Nephrops norvegicus	Norway lobster	0.6	19
Ommastrephidae		0.4	7	50	140
Platichthys flesus	Flounder	0.5	2	260	300
Pleuronectes platessa	Plaice	188.1	1562	130	340
Pomatoschistus spp.	Sand gobies	0.0	4	90	100
Rossia macrosoma	Stout bobtail squid	0.1	1
Scomber scombrus	Mackerel	7.0	30	260	370
Scophthalmus maximus	Turbot	1.7	2	340	350
Scophthalmus rhombus	Brill	0.6	1	330	330
Solea solea	Sole	0.1	1	200	200
Sprattus sprattus	Sprat	6.6	722	55	125
Squalus acanthias	Spurdog	369.4	119	670	1100
Trachinus draco	Greater weever fish	1.8	20	190	340
Trachurus trachurus	Horse mackerel	0.1	5	120	140
Zeugopterus punctatus	Topknot	0.0	1	90	90

Area 21


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.1	7	110	150
Ammodytes	Sand eels	11.0	760	150	225
Argentina sphyraena	Lesser silver smelt	0.1	6	120	150
Arnoglossus laterna	Scaldfish	3.3	354	70	160
Buglossidium luteum	Solenette	0.1	10	60	120
Callionymus lyra	Common dragonet	44.9	1552	80	230
Callionymus maculatus	Spotted dragonet	28.0	3222	70	150
Cancer pagurus	Edible crab	48.9	79	102	182
Chelidonichthys lucerna	Tub gurnard	1.3	6	200	360
Clupea harengus	Herring	359.4	26549	65	295
Crangon crangon	Common shrimp	0.2	122
Ctenolabrus rupestris	Goldsinny	0.0	1	60	60
Enchelyopus cimbrius	Four-bearded rockling	1.2	41	130	230
Engraulis encrasicolus	Anchovy	0.1	4	120	130
Eutrigla gurnardus	Grey gurnard	51.5	1410	60	350
Gadus morhua	Cod	27.9	196	90	680
Gasterosteus aculeatus	Three-spined stickleback	0.0	1	50	50
Glyptocephalus cynoglossus	Witch	0.6	5	180	330
Gobius niger	Black goby	0.1	6	90	150
Hippoglossoides platessoides	American plaice	219.9	9620	60	250
Hyperoplus lanceolatus	Greater sandeel	0.3	14	180	250
Limanda limanda	Common dab	1843.3	44447	50	350
Loligo	Loligo sp	10.6	4775	20	90
Lumpenus lampretaeformis	Snake blenny	1.1	95	120	310
Lycodes gracilis	Vahls eelpout	0.2	10	120	170
Melanogrammus aeglefinus	Haddock	35.3	783	100	320
Merlangius merlangus	Whiting	1242.4	61385	60	320
Merluccius merluccius	Hake	47.4	329	70	450
Microstomus kitt	Lemon sole	13.7	169	130	280
Molva molva	Ling	1.5	1	660	660
Mullus surmuletus	Striped red mullet	0.3	16	70	120
Mustelus asterias	Starry smooth-hound	1.1	1	640	640
Myoxocephalus scorpius	Sculpin	9.8	86	140	260
Nephrops norvegicus	Norway lobster	55.6	1657	20	51
Ommastrephidae		2.3	236	30	110
Pandalus borealis	Northern pink shrimp	13.6	2799
Pholis gunnellus	Butter fish	0.1	3	170	200
Platichthys flesus	Flounder	98.9	1070	100	410
Pleuronectes platessa	Plaice	897.5	13092	100	390
Pomatoschistus spp.	Sand gobies	0.8	121	50	150
Scomber scombrus	Mackerel	12.2	96	180	350
Scophthalmus maximus	Turbot	4.3	9	180	390
Scophthalmus rhombus	Brill	22.5	71	130	520
Scyliorhinus canicula	Lesser-spotted dogfish	1.8	2	560	570
Solea solea	Sole	5.7	51	110	300
Sprattus sprattus	Sprat	313.5	32793	65	180
Squalus acanthias	Spurdog	194.1	156	260	1020
Symphodus melops	Corkwing	0.1	2	130	140
Syngnathus acus	Great pipefish	0.0	1	430	430
Trachinus draco	Greater weever fish	563.8	8443	110	340
Trachurus trachurus	Horse mackerel	13.3	760	60	180
Trisopterus esmarkii	Norway pout	5.3	488	90	150
Trisopterus minutus	Poor-cod	0.0	1	150	150
Zeugopterus punctatus	Topknot	0.0	1	100	100
Zoarces viviparus	Eelpout	0.1	2	240	260

Area 22


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.4	25	100	170
Alosa fallax	Twaite shad	0.5	1	390	390
Amblyraja radiata	Starry ray	0.4	2	290	320
Anguilla anguilla	Eel	0.1	1	440	440
Arctica islandica	Ocean quahaug	237.1	0
Arnoglossus laterna	Scaldfish	1.8	207	60	150
Buglossidium luteum	Solenette	0.0	3	90	100
Callionymus lyra	Common dragonet	8.7	328	90	230
Callionymus maculatus	Spotted dragonet	0.5	64	80	130
Cancer pagurus	Edible crab	7.5	16	110	170
Chelidonichthys lucerna	Tub gurnard	0.3	3	190	250
Clupea harengus	Herring	236.4	19287	65	255
Ctenolabrus rupestris	Goldsinny	0.3	31	50	110
Enchelyopus cimbrius	Four-bearded rockling	0.5	9	190	260
Engraulis encrasicolus	Anchovy	0.1	12	90	140
Eutrigla gurnardus	Grey gurnard	38.6	661	90	330
Gadus morhua	Cod	66.9	1787	70	830
Glyptocephalus cynoglossus	Witch	0.0	2	130	140
Gobius niger	Black goby	3.5	312	70	130
Hippoglossoides platessoides	American plaice	22.9	557	80	300
Homarus gammarus	European lobster	1.2	1	122	122
Hyperoplus lanceolatus	Greater sandeel	0.1	4	200	280
Limanda limanda	Common dab	2745.3	72804	50	320
Lumpenus lampretaeformis	Snake blenny	2.5	270	90	270
Melanogrammus aeglefinus	Haddock	32.5	614	120	320
Merlangius merlangus	Whiting	677.2	23139	80	280
Merluccius merluccius	Hake	1.4	8	200	390
Microstomus kitt	Lemon sole	2.4	17	180	300
Mullus surmuletus	Striped red mullet	1.3	29	110	250
Myoxocephalus scorpius	Sculpin	16.2	221	100	250
Pholis gunnellus	Butter fish	0.2	10	130	190
Platichthys flesus	Flounder	74.3	633	110	450
Pleuronectes platessa	Plaice	1053.4	26407	50	360
Pomatoschistus spp.	Sand gobies	0.6	205	40	120
Scomber scombrus	Mackerel	4.2	68	170	220
Scophthalmus maximus	Turbot	14.6	29	210	430
Scophthalmus rhombus	Brill	8.0	50	120	460
Solea solea	Sole	28.0	201	90	380
Sprattus sprattus	Sprat	223.0	19842	70	155
Symphodus melops	Corkwing	0.1	4	110	140
Trachinus draco	Greater weever fish	35.0	530	130	290
Trachurus trachurus	Horse mackerel	31.0	2100	70	150
Trisopterus esmarkii	Norway pout	0.0	1	70	70
Trisopterus minutus	Poor-cod	0.0	1	120	120
Zoarces viviparus	Eelpout	0.9	31	120	230

Area 23


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.0	1	170	170
Arnoglossus laterna	Scaldfish	0.7	55	90	160
Callionymus lyra	Common dragonet	0.1	3	140	180
Callionymus maculatus	Spotted dragonet	0.7	88	80	110
Clupea harengus	Herring	51.8	2226	75	285
Eutrigla gurnardus	Grey gurnard	10.4	34	110	300
Gadus morhua	Cod	22.3	118	90	600
Gobius niger	Black goby	0.1	14	70	100
Hippoglossoides platessoides	American plaice	4.4	122	110	310
Hyperoplus lanceolatus	Greater sandeel	0.1	7	185	215
Limanda limanda	Common dab	1072.7	16959	90	320
Loligo	Loligo sp	0.5	152	30	50
Melanogrammus aeglefinus	Haddock	0.1	3	120	130
Merlangius merlangus	Whiting	250.8	9511	80	340
Merluccius merluccius	Hake	1.2	12	190	320
Myoxocephalus scorpius	Sculpin	1.9	16	160	230
Mytilus edulis	Blue mussel	631.4	0
Platichthys flesus	Flounder	143.3	657	100	430
Pleuronectes platessa	Plaice	529.9	4590	80	380
Pomatoschistus spp.	Sand gobies	0.0	10	60	90
Salmo trutta	Sea trout	0.6	1	390	390
Scomber scombrus	Mackerel	0.8	9	180	290
Scophthalmus maximus	Turbot	1.7	5	220	300
Scophthalmus rhombus	Brill	11.0	17	170	520
Solea solea	Sole	6.2	41	120	340
Sprattus sprattus	Sprat	119.8	7116	60	185
Syngnathidae	Pipefishes and seahorses	0.0	2	120	220
Trachinus draco	Greater weever fish	1.8	29	150	260
Trachurus trachurus	Horse mackerel	0.6	35	80	140

Area 24


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.3	10	140	170
Clupea harengus	Herring	247.1	9055	85	245
Crangon crangon	Common shrimp	0.0	37
Cyclopterus lumpus	Lumpfish	0.2	1	150	150
Enchelyopus cimbrius	Four-bearded rockling	1.8	36	100	260
Engraulis encrasicolus	Anchovy	0.0	1	150	150
Eutrigla gurnardus	Grey gurnard	0.0	1	150	150
Gadus morhua	Cod	293.6	5148	70	490
Gobius niger	Black goby	1.2	52	70	170
Hyperoplus lanceolatus	Greater sandeel	0.4	24	180	205
Limanda limanda	Common dab	181.7	2519	70	330
Lumpenus lampretaeformis	Snake blenny	0.2	15	160	260
Melanogrammus aeglefinus	Haddock	0.0	1	140	140
Merlangius merlangus	Whiting	66.4	2552	80	310
Myoxocephalus scorpius	Sculpin	6.4	77	110	260
Mytilus edulis	Blue mussel	85.2	0
Pholis gunnellus	Butter fish	0.0	1	200	200
Platichthys flesus	Flounder	162.4	1204	100	390
Pleuronectes platessa	Plaice	1393.6	19225	70	360
Pomatoschistus spp.	Sand gobies	0.3	235	30	60
Scomber scombrus	Mackerel	0.1	1	200	200
Scophthalmus maximus	Turbot	23.0	81	170	390
Scophthalmus rhombus	Brill	1.8	12	150	280
Solea solea	Sole	2.4	8	160	370
Sprattus sprattus	Sprat	29.8	3820	70	160
Trachurus trachurus	Horse mackerel	0.1	6	80	150
Zoarces viviparus	Eelpout	1.7	23	190	310

Area 25


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Agonus cataphractus	Pogge	0.0	1	100	100
Alosa fallax	Twaite shad	1.1	3	330	360
Clupea harengus	Herring	12435.9	245852	100	300
Crangon crangon	Common shrimp	0.0	3	10	10
Cyclopterus lumpus	Lumpfish	1.2	1	150	150
Enchelyopus cimbrius	Four-bearded rockling	8.1	183	60	330
Engraulis encrasicolus	Anchovy	0.0	1	130	130
Gadus morhua	Cod	3940.8	27399	30	550
Gobiidae	True gobies	0.1	27	20	50
Hyperoplus lanceolatus	Greater sandeel	0.2	11	175	205
Limanda limanda	Common dab	2.6	17	160	300
Lumpenus lampretaeformis	Snake blenny	0.0	1	270	270
Melanogrammus aeglefinus	Haddock	0.0	1	150	150
Merlangius merlangus	Whiting	3.8	48	100	350
Myoxocephalus quadricornis	Fourhorn sculpin	0.1	1	230	230
Myoxocephalus scorpius	Sculpin	71.3	471	140	300
Mytilus edulis	Blue mussel	9.6	0
Platichthys flesus	Flounder	365.7	1899	160	370
Pleuronectes platessa	Plaice	72.3	544	130	360
Saduria entomon	Saduria	5.3	2182
Scomber scombrus	Mackerel	2.4	4	350	420
Scophthalmus maximus	Turbot	6.1	22	210	320
Scophthalmus rhombus	Brill	0.2	1	260	260
Solea solea	Sole	0.1	1	220	220
Sprattus sprattus	Sprat	2048.0	153278	65	170
Trachurus trachurus	Horse mackerel	0.2	7	130	150
Zoarces viviparus	Eelpout	0.5	8	180	310

Area 26


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Clupea harengus	Herring	0.7	13	165	240
Enchelyopus cimbrius	Four-bearded rockling	0.0	1	120	120
Gadus morhua	Cod	171.2	776	210	560
Platichthys flesus	Flounder	0.4	2	250	260
Sprattus sprattus	Sprat	0.0	2	125	140

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

Flounder

Cod

Whiting

Haddock

Grey gurnard

Hake

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

Herring

Sprat

Common dab

Whiting

Plaice

Cod

Flounder

Horse mackerel

Grey gurnard

Haddock

All Species Caught

Area 20

Area 21

Area 22

Area 23

Area 24

Area 25

Area 26