BIOTIC Species Information for Eurydice pulchra
|Researched by||Lizzie Tyler||Data supplied by||University of Sheffield|
|Refereed by||This information is not refereed.|
|Typical food types||Other infaunal invertebrates associated with sandy shores and dead organic material.||Habit||Free living|
|Bioturbator||Flexibility||High (>45 degrees)|
|Height||Insufficient information||Growth Rate||0.3 mm/month|
|Adult dispersal potential||1km-10km||Dependency||Independent|
|General Biology Additional Information||Feeding
Eurydice pulchra is a highly predatory carnivore, its mouthparts are adapted for tearing and macerating animal tissue (Naylor, 1972).
Endogenous swimming rhythm
Eurydice pulchra has been shown to have an endogenously controlled circatidal rhythm cycle of swimming that is coupled to a circasemilunar pattern of emergence from the substratum (Alheit & Naylor, 1976; Jones & Naylor, 1970).
On the beach, the animals rely on the cue of increasing water agitation caused by the flood tide to swim from the sand, the endogenous component of the rhythm ensuring that they swim for up to 5-6 hours before reburying in the sand in a restricted zone between mean tide level (MTL) and high water neaps (HWN).
Eurydice pulchra swims mostly at night. Animals emerging from the sand, or washed out by turbulence during the day show photonegative behaviour and immediately bury themselves again.
|Biology References||Naylor, 1972, Hayward, 1994, Fish & Fish, 1996, Fish, 1970, Jones, 1970, Salvat, 1966, Jones & Naylor, 1970, Alheit & Naylor, 1976, Hayward & Ryland, 1990,|