BIOTIC Species Information for Aphelochaeta marioni
|Researched by||Will Rayment||Data supplied by||MarLIN|
|Refereed by||Dr Peter Gibbs|
|Growth form||Vermiform segmented
|Feeding method||Surface deposit feeder
|Typical food types||Organic debris, diatoms||Habit||Burrow dwelling|
|Bioturbator||Flexibility||High (>45 degrees)|
|Height||Growth Rate||1-1.5 mm/month|
|Adult dispersal potential||100-1000m||Dependency||Independent|
|General Biology Additional Information||Abundance
Gibbs (1969) studied the abundance of Aphelochaeta marioni (studied as Tharyx marioni) in Stonehouse Pool, Plymouth Sound. In silt/clay sediments at 5 m depth, the species occurred at a maximum density of 108,000 individuals/m2. In silt/clay and fine sand at the low water mark, the maximum density was 61,150 individuals/m2. Farke (1979) studied the abundance of Aphelochaeta marioni (studied as Tharyx marioni) in the Wadden Sea, Netherlands. In the intertidal, the maximum recorded abundance was 71,200 individuals/m2 in muddy sand.
Aphelochaeta marioni is a deposit feeder, feeding at the surface of the sediment at night. While feeding the animal remains in its burrow and the two palps roam at the surface transporting sand, debris and diatoms to the mouth along a tentacle canal crenulated with cilia. Farke (1979) is unsure whether Aphelochaeta marioni is a selective feeder, but it seems not, as sand grains have been found in the gut of the animal.
|Biology References||Hayward & Ryland, 1995b, Gibbs et al., 1983, Farke, 1979, Gibbs, 1969,|