Planned maintenance — 18th January 2018 12:00 to 22nd January 2018 09:00 [more]

Cruise inventory

RV Corella 7/70

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier7/70
Cruise period1970-06-12 — 1970-06-21
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To make vertical distribution studies of larvae using the
Lowestoft multiple sampler and Boothbay larva net.
2. To make comparative hauls with encased and unencased samplers.
3. To carry out filtration tests with pup samplers.
4. To take photographs of live fish larvae and other plankters.

A series of samples were collected with the multiple changing net over 2 separate 24-hour periods, on a line of stations across the main line of larval drift, and without the fibreglass encasement. The Boothbay net was used to collect larvae close to the bottom which could then be photographed alive. Plankton was collected and preserved in the various fixatives supplied. Water samples were collected.
Chief scientistDerek Harding (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corella 7/70 cruise report corella07_70.pdf — access key 'C' (0.14 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificSouthern North Sea, Yarmouth Roads, Smith's Knoll lightship, W of Texel Island, NE across the Borkum spawning ground, and Heligoland
Biology and fisheries 
Gear researchQuantity: number of hauls = 10
Description: Filtration tests were made with 5 pup samplers fitted with 60, 90, 120, 150 and 200 mpi nylon plankton nets mounted together on a framework and fished in midwater
Gear researchQuantity: number of hauls = 20
Description: Comparative hauls were made with paired 30" samplers, one of which was standard and the other unencased.