RRS Frederick Russell FR9/84
Cruise summary report
|Ship name (ship code)||RRS Frederick Russell (74GG)|
|Cruise period||1984-05-19 — 1984-06-02|
|Port of departure||Falmouth, United Kingdom|
|Port of return||Plymouth, United Kingdom|
|Objectives||(a) To determine the horizontal and vertical distribution of eggs and larvae of mackerel across the shelf, shelf-break and open ocean and relate their distribution to environmental variables.
(b) To determine the food and feeding rhythm of mackerel larvae (from gut analysis) over 24 hour periods and to relate their vertical distribution and migration to food availability.
(c) To determine rates of phytoplankton and bacterial production and relate these to the production and flux of organic matter by various components of the pelagic system.
(d) To relate primary production to the vertical structure, behaviour and feeding processes of the herbivorous zooplankton.
(e) To quantify and qualify the faecal pellets produced within the euphotic zone and their sedimentation rate.
(f) To investigate, by laboratory experiments onboard the feeding by mackerel larvae on concentrations of natural particulates, cultured diatoms and various size ranges of faecal pellets.
|Chief scientist||Bob Williams (Institute of Marine Environmental Research, Plymouth)|
|Cruise report||(0.26 MB)|
Bay of Biscay
North East Atlantic Ocean (limit 40W)
|Specific||S.W. Approaches/ S. Ireland/Biscay|
|Surface measurements underway (T,S)||Description: UOR,thermosalinograph|
|Bathythermograph||Quantity: number of profiles = 26|
|Water bottle stations||Quantity: number of stations = 14|
Description: vertical profiles with samples
|Phosphate||Quantity: number of stations = 14|
|Nitrate||Quantity: number of stations = 14|
|Nitrite||Quantity: number of stations = 14|
|Silicate||Quantity: number of stations = 14|
|Biology and fisheries|
|Primary productivity||Quantity: number of stations = 8|
|Phytoplankton pigs (eg chlorophyll, fluorescence)||Description: fluorescence,UOR|
|Phytoplankton pigs (eg chlorophyll, fluorescence)||Quantity: number of stations = 14|
Description: chlorophyll (a) stations UOR
|Particulate organic matter (inc POC, PON)||Quantity: number of stations = 14|
|Phytoplankton||Quantity: number of stations = 14|
|Zooplankton||Quantity: number of hauls = 12|
Description: Longhurst-Hardy plankton recorder (LHPR) oblique hauls
|Eggs and larvae||Description: survey:distribution,energy transfers,population structures|
|Pelagic bacteria/micro-organisms||Quantity: number of stations = 14|
|Other biological/fisheries measurement||Quantity: number of stations = 14|
Description: particle size
|Other biological/fisheries measurement||Description: feeding experiments|