Summary for Dolomedes fimbriatus (Araneae)

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National Distribution

 
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Dolomedes fimbriatus Subadult Male Copyright: Nik Nimbus
Identification difficulty rating: 3
Name: Dolomedes fimbriatus
Authority: (Clerck, 1757)
Order: Arachnida: Araneae
Family: Pisauridae

Records: 662
First Record: 1858
Latest Record: 2015

1992-on hectads: 49
Pre-1992 hectads: 37
Total hectads: 59

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About this species

Recorded altitude range
5m to 673m

Species text

Distribution
The species is widespread on southern heathlands, but very scattered elsewhere in Britain, north to Scotland. It is widespread in north-western and central Europe.

Habitat and ecology
Wet heathland, wet woodland, bogs. The main habitat of D. fimbriatus is Sphagnum bogs and pools, although juveniles may be found in much drier habitats away from bogs. The spider also inhabits water margins of ditches, ponds and slow flowing streams. Adults assume a hunting position on emergent water plants where the front appendages are held on the water surface. In this position the spider preys on invertebrates trapped on the water surface. When threatened the spider retreats underwater. Spiderlings hunt in high vegetation. Adults are found in spring and early summer. Females carry their spherical egg-sacs in their chelicerae and enclose them within a nursery web prior to spiderling emergence.

Status
Very local, recorded in 45 hectads since 1992, but the spider may be not infrequent on some wet southern heathlands. No apparent decline.

Threats
The main threats are destruction of heathland for housing development and agriculture and the drainage of wetlands.

Management and conservation
Protect heathland sites from destruction and ensure the water-table of wetlands is maintained.

Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.).  References

Adult Season

Adult Season Data (based on 55 records with adult season information)


Habitats

background methodology

Broad Habitat Data (based on 170 records with habitat information)

Broad subhabitat Data (based on 5 records with subhabitat information)

Structural Habitat Data (based on 58 records with structural habitat information)

Habitat Detail and Method (based on 72 records with habitat detail and method information)

Recorded management for locations with Dolomedes fimbriatus

Recorded substrate and hydrology for locations with Dolomedes fimbriatus

Images

Dolomedes fimbriatus close up
Dolomedes fimbriatus close up
Dolomedes fimbriatus juvenile with hoverfly
Dolomedes fimbriatus juvenile with hoverfly
Dolomedes fimbriatus on water
Dolomedes fimbriatus on water
Dolomedes fimbriatus raft spider
Dolomedes fimbriatus raft spider
Dolomedes fimbriatus Juvenile
Dolomedes fimbriatus Juvenile
Dolomedes fimbriatus Adult Female
Dolomedes fimbriatus Adult Female
Dolomedes fimbriatus Female with Spiderlings
Dolomedes fimbriatus Female with Spiderlings
Dolomedes fimbriatus Female with Egg Sac
Dolomedes fimbriatus Female with Egg Sac
Dolomedes fimbriatus Subadult Male
Dolomedes fimbriatus Subadult Male
Dolomedes fimbriatus
Dolomedes fimbriatus
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