Cruise summary report
|Ship name (ship code)||Prince Madog (74PD)|
|Cruise period||1989-05-02 — 1989-05-06|
|Port of departure||Menai Bridge, United Kingdom|
|Port of return||Menai Bridge, United Kingdom|
|Objectives||1, 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 scientist||Barry R Howell (Ministry of Agriculture, Fisheries and Food Conwy Laboratory)|
|Cruise report||(0.08 MB)|
|General||Irish Sea and St. George's Channel|
|Biology and fisheries|
|Eggs and larvae||Description: A number of eggs were collected for laboratory experiments. No. of samples not noted.|
|Demersal fish||Quantity: number of specimens = 40|
Description: A number of live mature sole were collected and returned to the laboratory.
|Demersal fish||Quantity: 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.