RV Prince Madog PD18/03
Cruise summary report
|Ship name (ship code)||RV Prince Madog (74P2)|
|Cruise period||2003-04-28 — 2003-04-30|
|Port of departure||Menai Bridge, United Kingdom|
|Port of return||Menai Bridge, United Kingdom|
|Objectives||CEFAS charter. Last in a series of five plankton surveys in the eastern Irish Sea in 2003 to:
1. Collect plankton samples for determination of plaice egg spawning and production.
2. Collect zooplankton samples for copepod production and fish larval feeding studies.
|Chief scientist||Natasha Bunn (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)|
|Project||Spatially structured population modelling of Irish Sea plaice|
|Cruise report||(0.08 MB)|
|General||Irish Sea and St. George's Channel|
|Specific||eastern Irish Sea|
|Track charts||(0.06 MB)|
|CTD stations||Quantity: number of stations = 41|
Description: FSI mini-CTD attached to sampler frame to provide profile of conductivity, temperature and depth. Purpose to monitor/ provide information on environmental parameters.
|Subsurface temperature and salinity measurements||Quantity: number of stations = 13|
Description: Samples of sea water from surface/near surface collected during selected tows. Analysed ashore for conductivity to compare to CTD measurements.
|Biology and fisheries|
|Zooplankton||Quantity: number of stations = 41|
Description: Samples collected in 80um mesh net attached to main plankton sampler and preserved in 4% formalin. Samples to be stored for future analysis to provide information on copepod production and fish larval feeding.
|Eggs and larvae||Quantity: number of stations = 41|
Description: Samples collected using Gulf VII unencased plankton sampler, towed from surface to near bottom in 'V' shaped profile. Volume of water filtered calculated from self-logging flowmeters inside nosecone. Eggs and larvae collected in 270um mesh net and preserved in formalin for later analysis. Purpose of analysis - to identify and quantify eggs and larvae.