BIOTIC Species Information for Crangon crangon
|Researched by||Ken Neal||Data supplied by||MarLIN|
|Refereed by||This information is not refereed.|
|Typical food types||A wide variety of animal and plant material.||Habit||Free living|
|Bioturbator||Flexibility||High (>45 degrees)|
|Height||Insufficient information||Growth Rate||14 mm/month|
|Adult dispersal potential||100-1000m||Dependency||Independent|
|General Biology Additional Information||
Crangon crangon is the most commonly encountered shrimp of sandy bays and estuaries, reaching densities of 60 per m² during summer peaks (Beukema, 1992). Crangon crangon buries itself in sand to avoid predators and to ambush prey. It prefers sediment of 125-710 µm grain size (Pinn & Ansell, 1993). Burial takes 9-10 seconds and is achieved by rapid beating of the abdominal limbs (pleopods) followed by violent shuffling and completed by the antennae sweeping sand over the back to leave only the eyes and antennae above the sediment surface (Pinn & Ansell, 1993). Onset of foraging activity of Crangon crangon is light controlled, and occurs at night (Addison et al., 2003) except in very turbid areas such as the Bristol Channel (Lloyd & Yonge, 1947).Population dynamics
The maximum age of Crangon crangon was reported as 3.3 years with the large majority (70-90%) of the population in the 1st year class, 10-20% in the 2nd year class and the rest in their 3rd year (Oh et al., 1999). Relative abundance of males changes with season and can vary between 6-82% in the Solway Firth (Abbott & Perkins, 1977). Juvenile Crangon crangon recruit to the benthos in May -July to exploit the annual calanoid copepod bloom that is the main food of the early benthic stages (Boddeke et al., 1986). Small post-settlement Crangon crangon migrate to inshore nursery areas for better foraging and predation protection, remaining in these areas for 2-3 weeks before heading back offshore (Cattrijsse et al., 1997). Adults migrate offshore November to March to avoid low salinity water (Boddeke, 1989; Henderson & Holmes, 1987).
Crangon crangon will consume just about any animal material including polychaetes, fish, molluscs and small arthropods (Dolmer et al., 2001; Henderson & Holmes, 1987; Kamermans & Huitema, 1994; Oh et al., 1999) but will also consume algae especially Ulva lactuca and Ulva intestinalis (Oh et al., 2001). In the Irish Sea, the mysid shrimp Schistomysis spiritus and amphipods (Gammarus sp.) made up 26-63% and 11-42% of gut contents respectively (Oh et al., 2001).
|Biology References||Oh et al., 1999, Beukema, 1992, Pinn & Ansell, 1993, Addison et al., 2003, Lloyd & Yonge, 1947, Perkins & Abbott, 1977, Boddeke et al., 1986, Cattrijsse et al., 1997, Boddeke, 1989, Hnederson & Holmes, 1987, Price & Uglow, 1979, Dolmer et al., 2001, Abbott & Perkins, 1977, Kamermans & Huitema, 1994, Oh et al., 2001, ICES, 1996, Walter & Becker, 1997, Goss-Custard et al., 1977, Holthuijzen, 1979, Al-Adhub & Naylor, 1975, Boddeke, 1975,|