The Danish research vessel Dana is used for the Danish participation in the International Bottom Trawl Survey (IBTS), which has the purpose of annually monitoring fish species. Internationally, each nation surveys part of the area, with some overlap in coverage and depth stratification, in a coordinated sampling design.

The IBTS 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. 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.

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

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	21911.3	443819
Haddock	11449.3	43436	140	480
Whiting	4120.6	45774	80	430
Herring	1249.6	47065	85	320
Plaice	394.2	3387	120	470
Cod	151.1	157	120	1000

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

Whiting

Haddock

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 (and Cod) cought during the survey, allocated to each ship. The black line represents the average length distribution of the 5 years previus surveys.

Cod

Sprat

Herring

Whiting

Haddock

Dab

Norway pout

Grey gurnard

Mackerel

Plaice

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)
Aequipecten opercularis	Queen scallop	0.4	9
Agonus cataphractus	Pogge	0.0	2	120	140
Alloteuthis subulata	European common squid	0.1	13	40	70
Amblyraja radiata	Starry ray	1.9	5	280	420
Arnoglossus laterna	Scaldfish	0.0	2	110	140
Callionymus lyra	Common dragonet	0.1	2	180	220
Callionymus maculatus	Spotted dragonet	0.0	1	150	150
Cancer pagurus	Edible crab	2.1	5	100	168
Clupea harengus	Herring	421.9	10556	85	265
Cyclopterus lumpus	Lumpfish	2.5	1	390	390
Echiichthys vipera	Lesser weever	0.0	1	140	140
Engraulis encrasicolus	Anchovy	0.2	19	80	180
Eutrigla gurnardus	Grey gurnard	8.7	186	70	330
Gadus morhua	Cod	12.2	42	130	830
Hippoglossoides platessoides	Long rough dab	29.5	539	80	240
Illex coindetii	Southern shortfin squid	0.0	1	100	100
Limanda limanda	Dab	56.9	678	90	310
Loligo forbesii	Northern squid	4.7	27	110	270
Loligo vulgaris	European squid	3.3	13	120	290
Lophius piscatorius	Angler fish	6.2	1	730	730
Melanogrammus aeglefinus	Haddock	281.3	705	140	460
Merlangius merlangus	Whiting	92.5	2280	100	330
Microstomus kitt	Lemon sole	8.2	39	180	350
Mustelus asterias	Starry smooth-hound	1.7	1	750	750
Pleuronectes platessa	Plaice	20.3	163	150	360
Pomatoschistus spp.	Sand gobies	0.0	4	40	50
Raja clavata	Thornback ray	1.7	1	610	610
Rossia macrosoma	Stout bobtail squid	0.0	1
Sardina pilchardus	Pilchard	0.5	39	80	260
Scomber scombrus	Mackerel	12.6	292	160	230
Scophthalmus maximus	Turbot	1.5	1	420	420
Scophthalmus rhombus	Brill	0.3	1	280	280
Scyliorhinus canicula	Lesser-spotted dogfish	0.4	1	470	470
Solea solea	Sole	0.3	1	300	300
Sprattus sprattus	Sprat	54.3	16241	60	150
Trachinus draco	Greater weever fish	0.1	2	220	230
Trachurus trachurus	Horse mackerel	1.5	72	90	240
Trisopterus esmarkii	Norway pout	1.0	56	100	190
Trisopterus minutus	Poor-cod	1.5	58	90	210

Area - 4A


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Alloteuthis subulata	European common squid	3.2	854	20	80
Amblyraja radiata	Starry ray	1.1	4	220	390
Argentina sphyraena	Lesser silver smelt	1.2	34	60	240
Callionymus lyra	Common dragonet	0.0	2	70	90
Callionymus maculatus	Spotted dragonet	0.0	3	120	130
Clupea harengus	Herring	1.4	11	225	320
Enchelyopus cimbrius	Four-bearded rockling	0.8	13	150	280
Eutrigla gurnardus	Grey gurnard	26.1	217	170	320
Gadiculus argenteus	Silvery pout	0.9	222	50	90
Gadus morhua	Cod	52.5	29	140	1000
Glyptocephalus cynoglossus	Witch	1.9	6	300	420
Helicolenus dactylopterus	Blue-mouth redfish	0.2	2	160	190
Hippoglossoides platessoides	Long rough dab	7.0	196	60	240
Illex coindetii	Southern shortfin squid	1.5	29	60	150
Limanda limanda	Dab	8.3	159	120	260
Lithodes maja	Norway king crab	1.5	2	96	108
Loligo forbesii	Northern squid	2.0	20	30	270
Lophius piscatorius	Angler fish	42.8	14	250	730
Melanogrammus aeglefinus	Haddock	529.2	1923	160	480
Merlangius merlangus	Whiting	327.6	1351	110	410
Merluccius merluccius	Hake	3.4	48	70	470
Micromesistius poutassou	Blue whiting	5.0	34	220	360
Microstomus kitt	Lemon sole	4.4	19	180	340
Molva molva	Ling	38.8	9	530	1300
Myxine glutinosa	Hagfish	0.0	1	150	150
Nephrops norvegicus	Norway lobster	37.4	585	32	65
Pleuronectes platessa	Plaice	3.3	14	250	320
Pollachius virens	Saithe	174.7	250	390	520
Rossia macrosoma	Stout bobtail squid	0.3	11
Scomber scombrus	Mackerel	1.9	26	160	280
Scophthalmus maximus	Turbot	0.8	1	360	360
Todaropsis eblanae	Lesser flying squid	13.5	159	80	130
Trachurus trachurus	Horse mackerel	1.1	15	130	370
Trisopterus esmarkii	Norway pout	49.6	2799	90	210
Trisopterus minutus	Poor-cod	4.4	76	150	220

Area - 4B


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	1.7	42
Agonus cataphractus	Pogge	0.1	8	70	130
Alloteuthis subulata	European common squid	85.3	16359	20	110
Amblyraja radiata	Starry ray	11.8	27	150	470
Ammodytes marinus	Lesser sandeel	20.0	5671	80	175
Anguilla anguilla	Eel	1.3	1	750	750
Aphia minuta	Transparent goby	0.0	15	30	40
Arnoglossus laterna	Scaldfish	0.6	58	50	130
Aspitriglia cuculus	Red gurnard	1.4	8	230	270
Buglossidium luteum	Solenette	2.8	309	50	120
Callionymus lyra	Common dragonet	3.8	96	130	230
Callionymus maculatus	Spotted dragonet	0.0	2	60	140
Callionymus reticulatus	Reticulated dragonet	0.0	5	50	100
Cancer pagurus	Edible crab	31.5	65	80	209
Ciliata mustela	Five-bearded rockling	0.1	2	150	180
Clupea harengus	Herring	826.4	36498	85	290
Cyclopterus lumpus	Lumpfish	0.3	1	190	190
Dicentrarchus labrax	Bass	1.6	2	420	440
Echiichthys vipera	Lesser weever	1.3	46	80	160
Eledone cirrhosa	Horned octopus	0.3	1
Enchelyopus cimbrius	Four-bearded rockling	1.2	31	110	280
Engraulis encrasicolus	Anchovy	0.4	67	80	140
Eutrigla gurnardus	Grey gurnard	620.9	10525	80	330
Gadus morhua	Cod	86.4	86	120	850
Gaidropsarus vulgaris	Three-bearded rockling	0.0	1	160	160
Gasterosteus aculeatus	Three-spined stickleback	0.0	1	40	40
Glyptocephalus cynoglossus	Witch	0.3	2	240	290
Gymnammodytes semisquamatus	Smoothed sandeel	0.0	1	210	210
Helicolenus dactylopterus	Blue-mouth redfish	0.6	5	170	220
Hippoglossoides platessoides	Long rough dab	61.9	1500	100	240
Homarus gammarus	European lobster	0.9	2	72	97
Hyperoplus lanceolatus	Greater sandeel	0.1	3	235	285
Illex coindetii	Southern shortfin squid	1.5	200	40	100
Leucoraja naevus	Cuckoo ray	0.4	1	380	380
Limanda limanda	Dab	1122.6	20787	70	330
Lithodes maja	Norway king crab	3.7	9	22	109
Loligo forbesii	Northern squid	46.6	225	40	360
Loligo vulgaris	European squid	25.5	66	130	340
Lophius piscatorius	Angler fish	5.7	4	100	600
Lumpenus lampretaeformis	Snake blenny	0.0	1	290	290
Melanogrammus aeglefinus	Haddock	10638.7	40808	150	460
Merlangius merlangus	Whiting	3700.4	42143	80	430
Microstomus kitt	Lemon sole	44.9	447	130	370
Mullus surmuletus	Striped red mullet	7.7	97	90	270
Mustelus asterias	Starry smooth-hound	40.9	59	340	910
Myoxocephalus scorpius	Sculpin	0.4	3	160	230
Myxine glutinosa	Hagfish	0.0	1	310	310
Nephrops norvegicus	Norway lobster	30.2	934	20	64
Pecten maximus	Great scallop	0.9	3
Phrynorhombus norvegicus	Norwegian topknot	0.0	7	50	80
Platichthys flesus	Flounder	7.8	31	230	360
Pleuronectes platessa	Plaice	370.6	3210	120	470
Pollachius pollachius	Pollack	0.7	1	440	440
Pomatoschistus spp.	Sand gobies	0.0	52	30	50
Raja brachyura	Blonde ray	10.9	6	400	790
Raja clavata	Thornback ray	33.4	15	420	810
Raja montagui	Spotted Ray	17.2	18	280	810
Rossia macrosoma	Stout bobtail squid	0.1	60
Sardina pilchardus	Pilchard	1.3	132	70	240
Scomber scombrus	Mackerel	152.9	3445	160	310
Scophthalmus maximus	Turbot	7.5	11	240	440
Scophthalmus rhombus	Brill	7.9	12	300	430
Scyliorhinus canicula	Lesser-spotted dogfish	80.9	173	230	680
Sepia officinalis	Common cuttlefish	3.9	21	50	200
Sepiola atlantica	Atlantic bobtail squid	0.1	26
Solea solea	Sole	0.3	2	190	290
Sprattus sprattus	Sprat	1037.6	199025	55	140
Squalus acanthias	Spurdog	14.4	38	280	920
Syngnathidae	Pipefishes and seahorses	0.0	1	240	240
Syngnathus acus	Great pipefish	1.3	4	144	360
Syngnathus rostellatus	Lesser pipefish	0.0	3	60	140
Todaropsis eblanae	Lesser flying squid	0.3	8	40	90
Trachinus draco	Greater weever fish	11.8	55	250	400
Trachurus trachurus	Horse mackerel	14.4	593	90	260
Trigla lucerna	Tub gurnard	1.8	10	230	290
Trigloporus lastoviza	Streaked gurnard	0.7	4	240	270
Trisopterus esmarkii	Norway pout	294.7	17903	80	240
Trisopterus luscus	Bib	10.8	158	110	250
Trisopterus minutus	Poor-cod	15.0	363	80	240
Zeus faber	John dory	1.3	3	140	330

Quarter 3

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.

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	45488.0	847576
Whiting	13380.4	130638	70	380
Haddock	9312.8	33296	100	460
Herring	9121.4	175630	65	330
Plaice	486.3	3953	120	510
Cod	57.4	147	100	680

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

Whiting

Haddock

Herring

Biodiversity

Shown is the Number of species cought by station

Length Distributions

Cod

Sprat

Herring

Whiting

Horse mackerel

Dab

Haddock

Mackerel

Norway pout

Grey gurnard

Plaice

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)
Aequipecten opercularis	Queen scallop	0.1	5
Argentina	Silver smelts	0.0	1	120	120
Arnoglossus laterna	Scaldfish	0.1	4	120	150
Buglossidium luteum	Solenette	0.0	1	110	110
Callionymus lyra	Common dragonet	0.3	7	150	210
Callionymus maculatus	Spotted dragonet	0.0	1	160	160
Cancer pagurus	Edible crab	12.8	47	68	160
Clupea harengus	Herring	4391.7	65230	175	270
Enchelyopus cimbrius	Four-bearded rockling	0.1	1	290	290
Eutrigla gurnardus	Grey gurnard	30.6	355	130	400
Gadus morhua	Cod	26.3	62	100	610
Hippoglossoides platessoides	Long rough dab	14.1	259	110	240
Illex coindetii	Southern shortfin squid	0.1	1	150	150
Limanda limanda	Dab	70.2	855	110	310
Loligo forbesii	Northern squid	20.8	237	40	300
Lophius piscatorius	Angler fish	0.4	1	280	280
Melanogrammus aeglefinus	Haddock	387.5	1023	110	460
Merlangius merlangus	Whiting	168.2	1253	70	380
Merluccius merluccius	Hake	2.2	5	240	450
Microstomus kitt	Lemon sole	10.5	87	170	280
Molva molva	Ling	0.4	2	290	360
Myoxocephalus scorpius	Sculpin	0.2	1	210	210
Nephrops norvegicus	Norway lobster	0.2	1	60	60
Pleuronectes platessa	Plaice	54.3	434	150	400
Pollachius pollachius	Pollack	2.9	1	740	740
Scomber scombrus	Mackerel	329.0	1766	240	380
Scophthalmus rhombus	Brill	0.3	1	300	300
Solea solea	Sole	0.4	2	240	300
Trachinus draco	Greater weever fish	39.8	273	240	370
Trachurus trachurus	Horse mackerel	11.8	36	250	380
Trigla lucerna	Tub gurnard	0.4	2	250	260
Trisopterus esmarkii	Norway pout	9.4	1049	60	190
Trisopterus minutus	Poor-cod	0.0	1	150	150

Area - 4B


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	4.1	20
Agonus cataphractus	Pogge	0.9	80	90	130
Alloteuthis subulata	European common squid	3.8	1691	10	140
Amblyraja radiata	Starry ray	5.1	22	100	390
Aphia minuta	Transparent goby	0.0	1	40	40
Arnoglossus laterna	Scaldfish	0.4	30	80	140
Buglossidium luteum	Solenette	0.5	45	70	120
Callionymus lyra	Common dragonet	2.5	75	110	240
Cancer pagurus	Edible crab	53.9	164	75	196
Clupea harengus	Herring	4005.5	34529	65	330
Echiichthys vipera	Lesser weever	0.9	36	80	150
Eledone cirrhosa	Horned octopus	0.2	1	100	100
Enchelyopus cimbrius	Four-bearded rockling	9.5	226	130	250
Engraulis encrasicolus	Anchovy	0.1	46	60	90
Eutrigla gurnardus	Grey gurnard	363.0	5649	130	380
Gadus morhua	Cod	31.2	85	100	680
Galeorhinus galeus	Tope	19.6	2	1200	1420
Glyptocephalus cynoglossus	Witch	1.1	6	260	320
Gymnammodytes semisquamatus	Smoothed sandeel	0.0	1	200	200
Helicolenus dactylopterus	Blue-mouth redfish	0.1	1	190	190
Hippoglossoides platessoides	Long rough dab	42.3	1060	100	250
Hippoglossus hippoglossus	Atlantic halibut	2.0	1	570	570
Homarus gammarus	European lobster	9.5	14	56	134
Hyperoplus lanceolatus	Greater sandeel	9.3	324	180	290
Illex coindetii	Southern shortfin squid	0.7	6	110	210
Leucoraja naevus	Cuckoo ray	0.4	1	400	400
Limanda limanda	Dab	2270.0	41917	80	300
Lithodes maja	Norway king crab	2.2	5	111	113
Loliginidae		6.0	363	20	110
Loligo	Loligo sp	1.2	120	10	120
Loligo forbesii	Northern squid	105.7	1678	30	310
Loligo vulgaris	European squid	3.9	9	200	330
Lophius piscatorius	Angler fish	2.3	2	260	520
Melanogrammus aeglefinus	Haddock	8925.3	32273	100	450
Merlangius merlangus	Whiting	11046.0	104311	70	370
Merluccius merluccius	Hake	13.3	7	450	830
Microchirus variegatus	Thickback sole	0.1	6	80	130
Micromesistius poutassou	Blue whiting	0.6	12	190	190
Microstomus kitt	Lemon sole	53.4	574	100	340
Mullus surmuletus	Striped red mullet	9.8	75	40	290
Mustelus asterias	Starry smooth-hound	137.3	61	620	1060
Myoxocephalus scorpius	Sculpin	0.1	3	140	150
Nephrops norvegicus	Norway lobster	0.9	21	24	47
Pecten maximus	Great scallop	0.6	8
Pleuronectes platessa	Plaice	366.1	2781	130	510
Pollachius virens	Saithe	1.5	4	270	400
Pomatoschistus spp.	Sand gobies	0.0	3	40	50
Raja brachyura	Blonde ray	7.5	3	590	760
Raja clavata	Thornback ray	61.7	66	270	730
Raja montagui	Spotted Ray	23.5	40	230	550
Raja undulata	Undulate ray	0.9	1	500	500
Sardina pilchardus	Pilchard	0.4	127	50	220
Scomber scombrus	Mackerel	2063.4	13130	180	400
Scophthalmus maximus	Turbot	6.4	9	200	450
Scophthalmus rhombus	Brill	2.9	4	270	440
Scyliorhinus canicula	Lesser-spotted dogfish	642.9	1023	260	670
Solea solea	Sole	18.2	284	150	360
Sprattus sprattus	Sprat	2020.4	194355	65	145
Squalus acanthias	Spurdog	16.4	72	240	890
Taurulus bubalis	Sea scorpion	0.0	1	120	120
Trachinus draco	Greater weever fish	4.1	23	260	400
Trachurus trachurus	Horse mackerel	1751.5	19684	50	380
Trigla lucerna	Tub gurnard	6.9	19	220	470
Trisopterus esmarkii	Norway pout	99.9	13441	60	190
Trisopterus luscus	Bib	5.5	47	180	270
Trisopterus minutus	Poor-cod	12.7	226	60	200
Zeus faber	John dory	0.4	1	280	280

Area - 4C


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	0.0	1
Agonus cataphractus	Pogge	0.2	23	20	110
Alloteuthis subulata	European common squid	2.9	385	20	120
Ammodytes marinus	Lesser sandeel	4.9	505	80	190
Arnoglossus laterna	Scaldfish	0.2	12	100	130
Aspitriglia cuculus	Red gurnard	3.9	40	200	270
Blennius ocellaris	Butterfly blenny	0.0	1	90	90
Buglossidium luteum	Solenette	0.7	60	70	110
Callionymus lyra	Common dragonet	7.6	155	40	240
Cancer pagurus	Edible crab	4.9	8	105	190
Clupea harengus	Herring	724.2	75871	85	235
Dicentrarchus labrax	Bass	3.4	3	320	540
Echiichthys vipera	Lesser weever	19.7	1055	60	170
Enchelyopus cimbrius	Four-bearded rockling	0.1	2	180	180
Engraulis encrasicolus	Anchovy	9.3	1169	40	120
Eutrigla gurnardus	Grey gurnard	14.3	179	120	300
Gobius niger	Black goby	0.0	2	100	110
Hippocampus hippocampus	Short-snouted seahorse	0.0	1
Homarus gammarus	European lobster	0.3	1	74	74
Hyperoplus lanceolatus	Greater sandeel	2.1	80	150	300
Limanda limanda	Dab	318.4	6975	30	270
Loliginidae		1.0	267	10	40
Loligo	Loligo sp	2.1	776	40	130
Loligo forbesii	Northern squid	56.6	1680	20	240
Maja squinado	Common spider crab	3.5	3	142	150
Merlangius merlangus	Whiting	2166.2	25074	70	330
Microstomus kitt	Lemon sole	2.1	20	130	250
Mullus surmuletus	Striped red mullet	55.8	933	40	280
Mustelus asterias	Starry smooth-hound	123.6	100	210	990
Myoxocephalus scorpius	Sculpin	0.8	8	130	220
Pecten maximus	Great scallop	0.4	2
Pholis gunnellus	Butter fish	0.0	1	130	130
Platichthys flesus	Flounder	0.6	2	280	330
Pleuronectes platessa	Plaice	65.9	737	120	380
Pomatoschistus spp.	Sand gobies	3.7	4608	20	50
Raja brachyura	Blonde ray	3.9	4	360	560
Raja clavata	Thornback ray	21.9	36	240	670
Raja montagui	Spotted Ray	5.4	7	260	780
Rossia macrosoma	Stout bobtail squid	0.1	74
Sardina pilchardus	Pilchard	32.2	2847	50	240
Scomber scombrus	Mackerel	85.5	469	170	370
Scophthalmus maximus	Turbot	0.4	2	210	230
Scophthalmus rhombus	Brill	0.2	1	260	260
Scyliorhinus canicula	Lesser-spotted dogfish	215.9	672	160	620
Sepia officinalis	Common cuttlefish	3.9	12	40	170
Sepiola atlantica	Atlantic bobtail squid	0.0	4
Solea solea	Sole	3.9	32	180	350
Spondyliosoma cantharus	Black sea bream	0.0	1	90	90
Sprattus sprattus	Sprat	829.4	84739	50	130
Squalus acanthias	Spurdog	0.9	1	590	590
Taurulus bubalis	Sea scorpion	0.0	1	140	140
Trachinus draco	Greater weever fish	0.6	3	270	340
Trachurus trachurus	Horse mackerel	795.0	93461	40	260
Trigla lucerna	Tub gurnard	3.3	12	210	380
Trisopterus esmarkii	Norway pout	0.0	1	140	140
Trisopterus luscus	Bib	33.8	326	160	290
Trisopterus minutus	Poor-cod	7.6	222	100	160
Zeus faber	John dory	0.7	2	250	260

Danish International Bottom Trawl Survey

Period

Quarter 1

Activity

Trawl Stations

CTD Stations

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

CPUE

CPUE for Selected Species

Cod

Plaice

Whiting

Haddock

Herring

Biodiversity

Length Distributions

Cod

Sprat

Herring

Whiting

Haddock

Dab

Norway pout

Grey gurnard

Mackerel

Plaice

Horse mackerel

All species Caught

Area - 20

Area - 4A

Area - 4B

Quarter 3

Activity

Trawl Stations

CTD Stations

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

CPUE

CPUE for Selected Species

Cod

Plaice

Whiting

Haddock

Herring

Biodiversity

Length Distributions

Cod

Sprat

Herring

Whiting

Horse mackerel

Dab

Haddock

Mackerel

Norway pout

Grey gurnard

Plaice

All species Caught

Area - 20

Area - 4B

Area - 4C