BIOTIC Species Information for Jassa falcata
|Researched by||Jacqueline Hill||Data supplied by||MarLIN|
|Refereed by||Prof. P. Geoff Moore|
|Distribution and Habitat|
|Distribution in Britain & Ireland||Found on all British coasts. Reported from several sites around the coast of Ireland.|
|Global distribution||Cosmopolitan in temperate and warm-temperate waters; widespread and frequently recorded in Atlantic, Pacific and Indian Oceans, both north and south of the equator. Reported from most coastal regions of North East Atlantic, and often locally abundant.|
|Biogeographic range||Not researched||Depth range||Lower eulittoral to 5 m|
|Migratory||Non-migratory / Resident|
|Distribution Additional Information||This species is an important fouling organism. The animals construct tubes from pieces of debris and sediment cemented together, often forming dense mats, particularly in warm water discharge pipes from power stations (Fish & Fish, 1996).
Reported to depths of 5m in Japan (Kamenskaya, 1977). Jassa falcata is often found inhabiting Laminaria holdfasts and so may be found at the greater depths inhabited by some kelps.
Jassa falcata appears to be out-competed by Parajassa pelagica or unable to survive in very strong wave action at shallow depths (K. Hiscock personal communication).
|Substratum preferences||Other species (see additional information)
Artificial (e.g. metal/wood/concrete)
|Physiographic preferences||Open coast
Strait / sound
Enclosed coast / Embayment
|Biological zone||Lower Eulittoral
|Wave exposure||Very Exposed
|Tidal stream strength/Water flow||Strong (3-6 kn)
Moderately Strong (1-3 kn)
|Salinity||Full (30-40 psu)
|Habitat Preferences Additional Information|
|Distribution References||Hayward & Ryland, 1995b, Lincoln, 1979, Picton & Costello, 1998, Costello et al., 1989,|