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

Cruise inventory

Prince Madog

Cruise summary report

Cruise Info. 
Ship name (ship code)Prince Madog (74PD)
Cruise period1989-05-02 — 1989-05-06
Port of departureMenai Bridge, United Kingdom
Port of returnMenai Bridge, United Kingdom
Objectives1, To supplement existing data on the timing of ovulation in sole.
2. To determine the relationship between the specific gravity of eggs, their post-ovulatory age and their fertilisability.
3 To determine the effects of the extent, duration and timing of cold shock on the induction of diploid gynogenesis and triploidy.
4. To return live fish to the laboratory to supplement the broodstocks.
Chief scientistBarry R Howell (Ministry of Agriculture, Fisheries and Food Conwy Laboratory)
Cruise reportPrince Madog  cruise report prince_madog_may89.pdf — access key 'C' (0.08 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Biology and fisheries 
Eggs and larvaeDescription: A number of eggs were collected for laboratory experiments. No. of samples not noted.
Demersal fishQuantity: number of specimens = 40
Description: A number of live mature sole were collected and returned to the laboratory.
Demersal fishQuantity: number of samples = 1
Description: A number of samples were collected to note the ovulation period of female fish, it was noted that the number grately increased after sunset.