BIOTIC Species Information for Pomatoceros triqueter
Researched byLizzie Tyler Data supplied byUniversity of Sheffield
Refereed byThis information is not refereed.
Reproduction/Life History
Reproductive typeProtandrous hermaphrodite
 Developmental mechanismPlanktotrophic
Reproductive SeasonSee additional information Reproductive LocationInsufficient information
Reproductive frequencyAnnual episodic Regeneration potential No
Life span2-3 years Age at reproductive maturity<1 year
Generation timeInsufficient information Fecundity
Egg/propagule size Fertilization typeInsufficient information
Larvae/Juveniles
Larval/Juvenile dispersal potential>10km Larval settlement periodSee additional information
Duration of larval stage11-30 days   
Reproduction Preferences Additional Information
  • Male Pomatoceros triqueter release spermatogonia or primary spermatocytes and females release primary oocytes through a pair of gonoducts, consisting of a ciliated funnel and tube (Thomas, 1940).
  • Hayward & Ryland (1995) and Segrove (1941) suggested that breeding of Pomatoceros triqueter probably takes place throughout the year. However, Hayward & Ryland (1995) noted a breeding peak in spring and summer and records from Port Erin by Moore (1937) indicated that breeding only took place in April in this location.
  • Castric-Fey (1983) studied variations in settlement rate and concluded that, although the species settled all year round, very rare settlement was observed during winter and maximum settlement occurred in April, June, August and Sept-Oct. Studies in Bantry Bay (Cotter et al., 2003) revealed a single peak in recruitment during summer (especially July and August) with very little recruitment at other times of the year. More individuals settled on panels at 7 m than at 4 m.
  • Larvae are pelagic for about 2-3 weeks in the summer. However, in the winter this amount of time increases to about 2 months (Hayward & Ryland, 1995).
Longevity
Longevity has been recorded to be between 1.5 to 4 years. Hayward & Ryland (1995) noted that individuals lived approximately 1.5 years, with most individuals dying after breeding (Hayward & Ryland, 1995). Castric-Fey (1983) found that under laboratory conditions, individuals were still alive after 2.5 years. However, Castric-Fey (1983) also stated that under natural conditions it is probable that they do not live any longer than this. Whilst Dons (1927) found that, according to measured growth rate, some of the individuals he studied would have been at least 4 years old.
Reproduction References Hayward & Ryland, 1995b, Dons, 1927, Thomas, 1940, Castric-Fey, 1983, Segrove, 1941, Moore, 1937, Cotter et al., 2003,
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