Golfingia

A Vulnerable genera from the “Other: Sipuncula” group, mostly found in Muddy Sandy Gravel

Muddy Sandy Gravel

Vulnerable

Other: Sipuncula

Genera Characteristics Recorded Traits Possible Values
Size in cm
  • 1-10 cm
  • 11-20 cm
  • <1 cm
  • 1-10 cm
  • 11-20 cm
  • >20 cm
Genera Characteristics Recorded Traits Possible Values
Motility (Adult)
  • Short Range Mobility
  • Adult
  • Short Range Mobility
  • Sedentary

“Short Range Mobility”

Motility (Larval)
  • Long Term Planktonic
  • Long Term Planktonic
  • Short Term Planktonic
  • Brooded or Laid Eggs

“Long Term Planktonic”

Lifespan
  • 1-2 years (Estimated)
  • >10 years
  • 3-10 years
  • 1-2 years
  • <1 year

estimated

Maturity
  • <1 year (Estimated)
  • >4 years
  • 3-4 years
  • 1-2 years
  • <1 year

estimated

Fecundity
  • 100 - 1000
  • 1 - 10
  • 10 - 100
  • 100 - 1000
  • 1000 - 10000
  • 10000 - 1 million
  • > 1 million

Image: Golfingia © MES

Vulnerability

Golfingia is a small-medium sized sipunculid worm belonging to the Family Golfingiidae. It reaches 2-20cm in length, depending on species, & lives in muddy sand & gravel. It has limited mobility & is likely to be vulnerable to dredging & to deposition of sediment mobilised by the dredging process.

 

Recoverability

There is little information on the life-span or age of reproductive maturity for this worm. The sexes are separate in most species (except for G.elongata which is hermaphroditic). There are also interspecific & regional differences in the breeding season. In most cases breeding in the autumn with up to 200 eggs of 0.15-0.25mm diameter fertilised externally & developing into a lecithotrophic larvae that spends from 1-5 months in the water column. This genus has a relatively low fecundity, & although larval dispersal potential is high, the larvae are not common & the recoverability is probably low.
 

References

  • Biology

    • Gibbs, 1975
    • Gibbs, 1976
    • Hayward & Ryland, 1995b
  • Taxonomy

    • Hayward & Ryland, 1995b
  • Reproduction

    • Cutler, 1994
    • Gibbs, 1975
    • Gibbs, 1976
    • Hayward & Ryland, 1995b
    • Rice, 1989