BIOTIC Species Information for Tellina fabula
|Researched by||Will Rayment||Data supplied by||MarLIN|
|Refereed by||This information is not refereed.|
|Reproductive Season||March to September||Reproductive Location||Insufficient information|
|Reproductive frequency||Annual protracted||Regeneration potential||No|
|Life span||3-5 years||Age at reproductive maturity||1-2 years|
|Generation time||1-2 years||Fecundity||Insufficient information|
|Egg/propagule size||Insufficient information||Fertilization type||Insufficient information|
|Reproduction Preferences Additional Information||Salzwedel (1979) observed the reproductive cycle of a population of Fabulina fabula (studied as Tellina fabula) from the German Bight. The first spawning occurred in March and the first spatfall occurred in April/May. The main spawning period was in July/August with the peak in spatfall being between July and September. Individuals that spawned in March also spawned again later in the year, whilst individuals that spawned for the first time in the summer spawned only once in the year. Spawning resulted in a mean weight loss of 23%.
Development after settlement appears to be highly dependent on environmental conditions. Withers (1977) recorded spatfall of Fabulina fabula (studied as Tellina fabula) at Oxwich in Wales. 14 months after settlement, individuals had grown to lengths between 5.5 mm and 11 mm. In contrast, post settlement individuals from the Øresund took 21 months to reach 3-4.5 mm in length (Muus, 1973). Salzwedel (1979) reported that Fabulina fabula reached maturity at a shell length of 10 mm. Given the above growth rates, it would appear that maturity could be reached in one year for fast growing individuals in warmer climates but may take 2 years or more for populations in colder water.
Salzwedel (1979) reported annual mortality of Fabulina fabula of 41% in the laboratory versus 82-96% in situ. The difference was attributed to the impacts of predation and substratum erosion in the natural environment.
|Reproduction References||Fish & Fish, 1996, Tebble, 1976, Warwick et al., 1978, Lopez-Jamar et al., 1995, Salzwedel, 1979, Bosselmann, 1991, Bosselmann, 1988, Bosselmann, 1989,|