Cruise inventory

RRS Discovery D250

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD250
Cruise period2000-09-15 — 2000-10-10
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnSouthampton, United Kingdom
PurposeResearch
ObjectivesFirst in a series of five cruises in the Porcupine Seabight to investigate activity and distribution of deep-sea demersal fish. Additional funding from SOC provided time to service a sediment trap at Porcupine Abyssal Plain location.

Cruise utilised OTSB trawls to sample demersal fauna at depths of 1500 m - 4800 m. Data on fish and cephalopods collected by Aberdeen University (A) and other invertebrates by SOC (B).

Aberdeen University autonomous landers collected in-situ data on deep-sea fish activity and bioluminescence.
Chief scientistMartin A Collins (University of Aberdeen, Oceanlab)
ProjectMetabolism, activity and distribution patterns of deep-sea demersal fishes
Coordinating bodyNERC funded
Cruise reportRRS Discovery D250 cruise report d250.pdf — access key 'C' (0.59 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificPorcupine Seabight; Goban Spur; Porcupine Abyssal Plain
Track chartsRRS Discovery D250 cruise track — d250trk.pdf (00 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of stations = 3
Description: CTD with water bottles
Biology and fisheries 
ZoobenthosQuantity: number of stations = 9
Description: OTSB trawls. Holothurians sampled for taxonomy. Asteroids sampled for taxonomy and molecular biology. Full analysis of invertebrates at PAP for long-term studies.
Demersal fishQuantity: number of stations = 9
Description: OTSB trawls. Fish retained for taxonomy. Fish muscle, heart, liver and brain taken for enzyme activity. Fish brains sampled for anatomical and biochemical studies. Fish eyes sampled for vision studies. Cephalopods sampled for taxonomy and ecology.
Demersal fishQuantity: number of stations = 9
Description: OTSB trawls. Holothurians sampled for taxonomy. Asteroids sampled for taxonomy and molecular biology. Full analysis of invertebrates at PAP for long-term studies.
Exploratory fishingQuantity: number of stations = 9
Description: OTSB trawls. Fish retained for taxonomy. Fish muscle, heart, liver and brain taken for enzyme activity. Fish brains sampled for anatomical and biochemical studies. Fish eyes sampled for vision studies. Cephalopods sampled for taxonomy and ecology.
Exploratory fishingQuantity: number of stations = 9
Description: OTSB trawls. Holothurians sampled for taxonomy. Asteroids sampled for taxonomy and molecular biology. Full analysis of invertebrates at PAP for long-term studies.
Moorings, landers, buoys 
Physical oceanography 
Current meters50° 17' 59" N  13° 12' 59" W — Fish activity lander
Current meters49° 0' 0" N  16° 30' 0" W — Fish activity lander
Current meters49° 39' 59" N  13° 56' 59" W — Fish activity lander
Current meters49° 43' 59" N  14° 3' 59" W — Fish activity lander
Current meters49° 52' 59" N  14° 12' 59" W — Fish activity lander
Biology and fisheries 
Sediment traps48° 58' 59" N  16° 25' 59" W — Sediment trap recovery
Phytobenthos51° 27' 0" N  11° 45' 0" W — Bathysnap deployment
Phytobenthos51° 27' 0" N  11° 45' 0" W — Bathysnap recovery
Zoobenthos51° 27' 0" N  11° 45' 0" W — Bathysnap recovery
Zoobenthos51° 27' 0" N  11° 45' 0" W — Bathysnap deployment
Demersal fish50° 17' 59" N  13° 12' 59" W — Fish activity lander
Demersal fish50° 30' 0" N  15° 0' 0" W — Fish respirometer
Demersal fish49° 39' 59" N  13° 56' 59" W — Fish activity lander
Demersal fish49° 52' 59" N  14° 12' 59" W — Fish activity lander
Demersal fish49° 49' 59" N  14° 3' 59" W — Fish respirometer
Demersal fish49° 0' 0" N  16° 30' 0" W — Fish activity lander
Demersal fish49° 43' 59" N  14° 3' 59" W — Fish activity lander
Gear research48° 18' 59" N  11° 54' 59" W — DERA materials pressure test recovered
Other biological/fisheries measurement50° 0' 0" N  14° 19' 59" W — Bioluminescence study
Other biological/fisheries measurement49° 45' 0" N  14° 3' 0" W — Bioluminescence study
Other biological/fisheries measurement49° 42' 59" N  14° 0' 0" W — Bioluminescence study
Other biological/fisheries measurement51° 9' 59" N  11° 40' 59" W — Bioluminescence study