BIOTIC Species Information for Furcellaria lumbricalis
|Researched by||Will Rayment||Data supplied by||MarLIN|
|Refereed by||This information is not refereed.|
|Growth form||Arborescent / Arbuscular
|Typical food types||Not relevant||Habit||Attached|
|Bioturbator||Not relevant||Flexibility||High (>45 degrees)|
|Height||Up to 30 cm||Growth Rate||1.3% increase in fresh weight / day|
|Adult dispersal potential||None||Dependency||Independent|
|General Biology Additional Information||Size at maturity
Plants become fertile when they achieve their full size of 90-300mm according to habitat, during the 4th to 6th year (Austin 1960a,b).
Bird et al. (1979) reported growth rates of Furcellaria lumbricalis in the laboratory as a doubling in weight in 25-50 days or a 3.3% increase in fresh weight per day. For comparison, the corresponding rates for Chondrus crispus are 10 days and 7.3%, and for Fucus serratus are 12.5 days and 6.2%. These figures suggest that Furcellaria lumbricalis grows slowly in comparison to other red and brown seaweeds. The reported growth rates from the field are even slower. Blinova (1975) (cited in Bird et al., 1979) recorded a doubling in fresh weight every 167 days and Taylor (1975) (cited in Bird et al., 1979) recorded a 1.3% increase in fresh weight per day. From a site in Wales, Austin (1960b) reported annual length increments of 29-37mm in fronds initially ranging from 10-60mm in length.
As well as the commoner epilithic form, a free floating variant Furcellaria lumbricalis forma aegagropila has been reported forming rafts several metres thick on the Danish coast and may occur in Scottish and Irish sea lochs (Levring et al., 1969). The free floating form has a globose thallus of radiating fronds and is smaller in stature and frond diameter, with denser and less regular branching than the attached form (Bird et al., 1991).
|Biology References||Dickinson, 1963, Fish & Fish, 1996, Dixon & Irvine, 1977, Bird et al., 1991, Austin, 1960a, Austin, 1960b, Bird et al., 1979, Levring et al., 1969, Sharp et al., 1993, Barton, 1901,|