Somniosus microcephalus (Greenland shark):  

Predictions & Data for this entry

Model:  std  

MRE = 0.065
SMSE = 0.095

Zero-variate data
tp5.694e+04 5.847e+04 (0.0268)dtime since birth at pubertyNielHede2016
am1.431e+05 1.431e+05 (2.072e-05)dlife spanNielHede2016
Lb 40 40.3 (0.007499)cmtotal length at birthMacNMcMe2012
Lp480 462.9 (0.03556)cmtotal length at pubertyMacNMcMe2012
Li640 662.2 (0.03473)cmultimate total lengthMacNMcMe2012
Ri0.003044 0.00305 (0.0018)#/dmaximum reprod rateKoef1957
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
LW see Fig. 1 (0.1128)total lengthwet weightLeclLyde2012
LW2 see Fig. 2 (0.1038)total lengthwet weightNielHede2014
LW3 see Fig. 3 (0.3309)total lengthwet weightNielHede2014
tL see Fig. 4 (4.045e-07)timetotal lengthMacNMcMe2012
Pseudo-data at Tref
DataGeneralised animalSomniosus microcephalusUnitDescription
v 0.02 0.02371cm/denergy conductance
kap 0.8 0.8862-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 19.38J/^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.8001-growth efficiency


  • Accumulates trimethylamine N-oxide in its tissues as osmoprotectants and to increase their buoyancy. Flesh (kęstur hįkarl) is eaten in Iceland after detoxicification. (ref: Wiki)
  • Males typically smaller than females (ref: YanoStev2007)
  • Viviparous (ref: MacNMcMe2012)
  • A mature female of 447 cm TL had 455 oocytes, 5 cm diameter, weighing altogher 49 kg (ref: NielHede2014)


  • Gestation time is unknown. The assumed litter-interval of 9 yr is the smallest for which the predicted gestation time is smaller than the litter interval (given this set of life-history data)


  • Wiki
  • fishbase
  • Kooy2010
  • LeclLyde2012
  • LydeAaro2016
  • YanoStev2007
  • NielHede2014
  • MacNMcMe2012
  • NielHede2016
  • Koef1957
  • AuguLika2017

Bibtex files with references for this entry

Bas Kooijman, Starrlight Augustine, 2016/09/04

accepted: 2017/02/17

refer to this entry as: AmP Somniosus microcephalus version 2017/02/17