Cruise inventory

RRS James Clark Ross JR20040309 (JR100)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20040309 (JR100)
Cruise period2004-03-09 — 2004-04-05
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
Objectives1. Characterise the vertical and horizontal distribution of fish in the area between the Shag Rocks and South Georgia shelves, and relate fish distribution to the physical oceanography of the region and the foraging behaviour of fur seals.

2. Investigate the diet and trophic ecology of myctophids.

3. Investigate enzyme activities, anti-oxidants and pollutants in the tissue of mesopelagic fish.

4. Investigate the visual ecology of mesopelagic fish in relation to habitat depth and foraging behaviour (AFI/CGS Award).

5. Service the Acoustic moorings (AFI).

6. Undertake the end of season Western Core Box Survey

7. Continue time series of Longhurst-Hardy Plankton Recorder deployments at shallow and deep locations to the NW of South Georgia.
Chief scientistMartin A Collins (British Antarctic Survey)
Cruise reportRRS James Clark Ross JR20040309 (JR100) cruise report jr100.pdf — access key 'C' (3.97 MB) 
Ocean/sea areas 
GeneralSouth Atlantic Ocean
SpecificSouth Georgia, Shag Rocks shelves
Measurements 
Physical oceanography 
BathythermographQuantity: number of deployments = 48
Description: A number of XTBs were deployed throughout the cruise.
Subsurface temperature and salinity measurementsQuantity: number of measurements = 25
Description: A number of CTD casts made during the cruise.
Current metersQuantity: number of measurements = 25
Description: A number of CTD casts made during the cruise.
Biology and fisheries 
ZooplanktonQuantity: number of deployments = 58
Description: No of Bongo hauls made throughout the cruise.
Pelagic fishQuantity: number of hauls = 13
Description: A number of pelagic trawls were made throughout the period of the cruise.