BIOTIC Species Information for Patella vulgata
|Researched by||Jacqueline Hill||Data supplied by||MarLIN|
|Refereed by||Prof. Steve J. Hawkins|
|Reproductive type||Protandrous hermaphrodite
|Reproductive Season||See additional information||Reproductive Location||Water column|
|Reproductive frequency||Annual protracted||Regeneration potential||No|
|Life span||11-20 years||Age at reproductive maturity||<1 year|
|Generation time||3-5 years||Fecundity||Insufficient information|
|Egg/propagule size||Eggs 160 µm in diameter||Fertilization type||External|
|Reproduction Preferences Additional Information||Reproduction
Patella vulgata become sexually mature as males aged about nine months. Sex change may occur at one year, commonly at two to three, occasionally later and some limpets never become female. Spawning is believed to be induced by rough seas and onshore winds. Eggs (160 µm in diameter) are broadcast singly and fertilized externally. They are dark green in colour due to the presence of a pigment called chromoprotein Y (Fretter & Graham, 1974). The trochophore larvae has a pelagic life of about 2 weeks and then settles on rocks at a shell length of about 0.2 mm. Newly settled spat are usually found in rock pools or permanently damp situations. Recruitment fluctuates from year to year and from place to place and Bowman (1981) has pointed out that traditional statements about patellid breeding seasons are not universally valid for the British Isles.
Annual, with peaks within a defined spawning season (October - January) depending on location. Patella vulgata is a winter breeder only in southern England, in the north of Scotland it breeds in August and in north-east England in September.
|Reproduction References||Hayward et al., 1996, Fish & Fish, 1996, Fretter & Graham, 1994, Fretter & Graham, 1976, Bowman, 1981,|