Parathyasira sp (Northern hatchet shell akin):  

Predictions & Data for this entry

Model:  abj  

MRE = 0.062
SMSE = 0.115

Zero-variate data
am2190 2190 (8.078e-05)dlife spanCollDufo2017
Lb0.0138 0.01385 (0.003738)cmtotal length at birthGiolDufo2015
Lp0.28 0.2801 (0.0002326)cmtotal length at pubertyDufo2017
Li0.514 0.4845 (0.05748)cmultimate total lengthDufo2017
Wdi0.002783 0.00285 (0.02416)gultimate ash-free dry weightMari2017
Ri6.137 6.141 (0.0007337)#/dmaximum reprod rateguessed
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
LWd see Fig. 1 (0.3383)total lengthash-free dry weightMari2017
tL see Fig. 2 (0.07528)time since birthaverage lengthCollDufo2017
Pseudo-data at Tref
DataGeneralised animalParathyasira spUnitDescription
v 0.02 0.02025cm/denergy conductance
kap 0.8 0.9487-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 21.25J/^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.8006-growth efficiency


  • Tyasirids are mixotrophs, they have nutritional input from suspension feeding and from particulate feeding on sediment free-living bacteria. (ref: DufoLaur2014)
  • Parathyasira sp. is asymbiotic. (ref: BatsLaur2014)
  • Parathyasira sp. is sympatric with Thyasira cf. gouldi (which is symbiotic), both being found in close proximity and with a patchy distribution. (ref: BatsLaur2014)
  • Parathyasira sp. has a broad distribution but it is constrained to lower latitudes when compared to Thyasira cf. gouldi, which is panarctic. (ref: Dufo2017)


  • A minimal amount of information on Thyasira gouldi is used in this entry when there is no corresponding data for Parathyasira sp.


  • Wiki
  • Kooy2010
  • LikaKear2011
  • Blac1973
  • LaurBats2015
  • DufoLaur2014
  • BatsLaur2014
  • CollDufo2017
  • GiolDufo2015
  • Dufo2017
  • Mari2017
  • guessed

Bibtex files with references for this entry

Joany Marino, 2017/11/22

accepted: 2017/11/22

refer to this entry as: AmP Parathyasira sp version 2017/11/22