RRS Discovery D15

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD15
Cruise period1966-10-07 — 1966-11-28
Port of departurePlymouth, United Kingdom
Port of returnPlymouth, United Kingdom
Objectives1. The collection and study of animals occurring above the slopes of the Azores, Madeira, Fuerteventura and Morocco. Catch volumes and preliminary sorting to be done on board.
2. A study of the variation between replicate hauls of the N113H and N7OV at selected depths to aid in the evaluation of results obtained on the SOND cruise of 1965, to compare previous similar work done at 30N and 23W and to facilitate the planning of future sampling.
3. Sampling at the principal area studied during the SOND cruise to find any marked differences in faunal composition between the years.
4. Experiments in the operation of the EMT and the free rise net (F.R.N)
Chief scientistMalcolm R Clarke (National Institute of Oceanography)
Cruise reportRRS Discovery D15 cruise report d15.pdf (0.89 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
Track chartsRRS Discovery D15 cruise track — d15trk.pdf (0.02 MB) 
Physical oceanography 
Surface measurements underway (T,S)
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: chlorophyll 'a' content of the water as a measure of the standing crop of phytoplankton.
PhytoplanktonQuantity: 12
NeustonDescription: Net continuously used to collect small surface animals for physiological experiments.
Pelagic fishQuantity: number of hauls = 40
Description: Engel midwater trawls.