Resources

FV Jo's Boys Young Fish Survey 1986

Cruise summary report

Cruise Info. 
Ship nameFV Jo's Boys
Cruise identifierYoung Fish Survey 1986
Cruise period1986-09-01 — 1986-09-02
StatusCompleted
Port of departureDungeness, United Kingdom
Port of returnDungeness, United Kingdom
PurposeResearch
ObjectivesBeam trawling in the area Dymchurch to Camber. Push net sites sampled throughout.

Young Fish Survey 1986 with: FV Alvic, FV Avon Valley, FV Challenge, FV Jo's Boys, FV Serenity, FV St Richard, FV Joanna J., FV Kimbill of Eden and FV Sharowna.

1. To carry out an inshore beam trawl and push net survey of part of the North Sea and English Channel coasts of young demersal fish in relation to the environment. To include collecting data for juvenile flatfish yearclass size estimation.
2. To continue studies of growth and mortality of young sole in the areas off Lowestoft and Rye Bay.
3. To carry out a beam trawl survey of gravel extraction grounds east of the Isle of Wight. (For AEP2)

Results:
1. In total in the Young Fish Survey. 313 hauls made using the standard 2m beam trawl and 52 push net sites using the standard 1.5m push net sampled. All fish caught identified and measured. Salinity and sediment samples collected and surface temperature, benthos, shrimp by-catch and dissolved oxygen (River Thames) observed at each station.

2. Lowestoft and Rye Bay. Detailed survey of the distribution and abundance of 0-group sole. Live 0-group sole were held in tanks for 24 hours then deep frozen for laboratory estimation of condition factors. Samples of 0-group sole collected for total lipid content analysis. Samples of 0-group sole and plaice collected for morphometric studies.

3. 26 beam trawl hauls were made in 5 gravel extraction areas east of the Isle of Wight. All fish caught were identified and measured and observations of benthos were recorded for each station.
Chief scientistColin L Whiting (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportFV Jo's Boys Young Fish Survey 1986 cruise report commercial_vessels_aug86.pdf (0.09 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificScottish Border-Swanage Bay Dymchurch to Camber
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: observations made at every station
Biology and fisheries 
Biochemical measurements (eg lipids, amino acids)Description: samples of 0-group sole collected for total lipid content analysis
PhytobenthosDescription: observations made at every station
ZoobenthosDescription: observations made at every station
Demersal fishQuantity: number of hauls = 52
Description: (in total throughout Young Fish Survey) push net of Dymchurch to Camber
Demersal fishDescription: 0-group sole and plaice for morphometric studies
Demersal fishDescription: deep frozen sole
Demersal fishQuantity: number of hauls = 313
Description: (in total throughout Young Fish Survey) beam trawl survey of Dymchurch to Camber
CrustaceansDescription: by-catch of shrimp recorded at each station
Other biological/fisheries measurementDescription: distribution and abundance of 0-group sole
Geology and geophysics 
GrabDescription: observations made at every station