RV Corella 7/70
Cruise summary report
|Ship name (ship code)||RV Corella (74CX)|
|Cruise period||1970-06-12 — 1970-06-21|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
|Objectives||1. 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 scientist||Derek Harding (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)|
|Cruise report||(0.14 MB)|
|Specific||Southern North Sea, Yarmouth Roads, Smith's Knoll lightship, W of Texel Island, NE across the Borkum spawning ground, and Heligoland|
|Biology and fisheries|
|Gear research||Quantity: number of hauls = 20|
Description: Comparative hauls were made with paired 30" samplers, one of which was standard and the other unencased.
|Gear research||Quantity: 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