Pandalus

A Robust genera from the “Crustaceans” group, mostly found in Cobbles

Cobbles

Robust

Crustaceans

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

“Adult”

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

“Long Term Planktonic” “Brooded or Laid Eggs”

Lifespan
  • 3-10 years
  • >10 years
  • 3-10 years
  • 1-2 years
  • <1 year
Maturity
  • 1-2 years
  • <1 year
  • >4 years
  • 3-4 years
  • 1-2 years
  • <1 year
Fecundity
  • 1000 - 10000
  • 1 - 10
  • 10 - 100
  • 100 - 1000
  • 1000 - 10000
  • 10000 - 1 million
  • > 1 million

Image: Pandalus © MES

Vulnerability

Pandalus is a genus of medium-sized free-living prawns (Pink shrimp) belonging to the Family Pandalidae. It reaches a length of up to 15cm & lives amongst epigrowths on the seabed. It reaches high densities in the North Sea amongst communities of the Ross worm (Sabellaria spinulosa). It is moderately mobile & can swim into the water column, so is likely to be able to avoid disturbance by dredging, although it is vulnerable to the impacts of sediment deposition on its seabed habitat.
 

Recoverability

Pandalus has a life-span of 3-5yrs & reaches reproductive maturity in 3 months in primary females but up to 18 months in individuals that are hermaphrodite. Some species are mature at 2.5 years. Reproduction is in the spring with the production of eggs of about 0.5mm that are fertilised internally then carried under the abdomen. Females carry 1,000 to 3,000 eggs which emerge as initially lecithotrophic zoea larvae that change to a planktotrophic form after about 6 days. The planktonic zoea stage lasts for as long as 4-6 months & settlement is in March to May. This genus has a widespread dispersal potential of at least 10km & a relatively rapid growth rate to sexual maturity. It has a high recoverability.
 

References

  • Biology

    • Allen, 1959
    • Bergstrom, 2000
    • Hayward & Ryland, 1995b
    • Howard, 1983
    • Shumway et al., 1985
    • Sokolov, 2002
  • Taxonomy

    • Bergstrom, 2000
    • Hayward & Ryland, 1995b
    • Howson & Picton, 1997
  • Distribution

    • Bergstrom, 2000
    • Hayward & Ryland, 1995b
    • NBN, 2002
    • Shumway et al., 1985
  • Reproduction

    • Allen, 1959
    • Bergstrom, 2000
    • Dahlstrom, 1960
    • Hayward & Ryland, 1995b
    • Howard, 1983
    • Mente, 2008
    • Pike & Williamson, 1964
    • Wienberg, 1982