Corystes

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

Sand

Robust

Crustaceans

Genera Characteristics Recorded Traits Possible Values
Size in cm
  • 1-10 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
  • Long Term Planktonic
  • Short Term Planktonic
  • Brooded or Laid Eggs

“Long Term Planktonic”

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

estimated

Image: Corystes © MES

Vulnerability

Corystes is a burrowing crab of up to 4cm body length that lives in sandy deposits. It draws in water for gas exchange through the bristles of modified antennae. The crab is moderately mobile & is able to re-bury itself following disturbance. It is likely to be vulnerable to dredging, but is well-adapted to life in mobile sandy deposits & is probably tolerant of sediments mobilised during the dredging process.
 

Recoverability

The life-span of this genus is thought to be between 3 and 5 years and sexual maturity reached at about 1 year.  Breeding is from May-July & following internal fertilisation, eggs of 0.5mm diameter are released & develop into planktotrophic (zoea) larvae over a period of 11-30 days. These & the subsequent megalopa stage are often abundant in the plankton from March-June. Larval dispersal potential is probably relatively high. Recoverability probably high, although more information on life-span & fecundity is needed to confirm this.

 

References

  • Biology

    • Crothers & Crothers, 1988
    • Fish & Fish, 1996
    • Hayward & Ryland, 1990
    • Hayward & Ryland, 1995b
    • Ingle, 1980
    • Julie Bremner, unpub data
    • Warner, 1977
  • Taxonomy

    • Campbell, 1982
    • Hayward & Ryland, 1995b
    • Hayward et al., 1996
    • Howson & Picton, 1997
    • Naylor, 2000
  • Distribution

    • Hayward & Ryland, 1990
    • Hayward & Ryland, 1995b
    • Hayward et al., 1996
    • Hiscock et al, 2001
    • Ingle, 1980
    • Julie Bremner, unpub data
    • NBN, 2002
    • Warner, 1977
  • Reproduction

    • Crothers & Crothers, 1988
    • Gurney, 1902
    • Hartnoll, 1968
    • Hayward & Ryland, 1995b
    • Ingle, 1980
    • Julie Bremner, unpub data
    • Mente, 2008
    • Tillin et al., 2006
    • Wenner, 1985