Mnemiopsis leidyi (Sea walnut):  

Predictions & Data for this entry

Model:  asj  

MRE = 0.303
SMSE = 0.356

Zero-variate data
ab 1 1.174 (0.1736)dage at birthJaspHara2013
tp 13 16.48 (0.2675)dtime since birth at pubertyBakeReev1974
am244 243.8 (0.0008614)dlife spanissg
Lb0.04 0.06133 (0.5333)cmoral-aboral length at birthMart1987
Lj 1 1.132 (0.1317)cmoral-aboral length at metamRapoNova2005
Lp 3 4.253 (0.4178)cmtotal length at pubertyReevSyms1989
Li 6 5.531 (0.07815)cmultimate oral-aboral lengthWalrLang2013
Wc00.22 0.1115 (0.4933)ginitial carbon weight of eggJaspCost2014
Wwi 50 52.09 (0.04176)gultimate wet weight Jasp2012, WalrLang2013
R781.123e+04 4469 (0.6021)#/dreprod rate at 78 mm total lengthJaspCost2014
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
LWw see Fig. 1 (0.398)oral-aboral lengthwet weightWalrLang2013
LV see Fig. 2 (0.2289)oral-aboral lengthdisplacement volumeJasp2012
LR see Fig. 3 (0.4518)oral-aboral lengthreproduction rateJasp2012
WwR see Fig. 4 (0.5163)wet weightreproduction rateKrem1976
LR2 see Fig. 5 (0.6704)total lengthreproduction rateBakeReev1974
tL see Fig. 6 (0.1278)time since birthtotal lengthBakeReev1974
tN see Fig. 7 (0.1425)time since birthcumulative # of eggsBakeReev1974
LWC see Fig. 8 (0.1746)total lengthcarbonReevSyms1989
Pseudo-data at Tref
DataGeneralised animalMnemiopsis leidyiUnitDescription
v 0.02 0.03153cm/denergy conductance
kap 0.8 0.3911-allocation fraction to soma
kap_R 0.95 0.475-reproduction efficiency
p_M 18 109.2J/^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.7989-growth efficiency


  • This entry is discussed in AuguJasp2014 (ref: AuguJasp2014)
  • Data from all Mnemiopsis leidyi and mccradyi species can be combined as the genus is considered monospecific until further research is done (ref: Bayh2005)
  • There are no benthic resting stages. Mnemiopsis sp. has 3 larval stages: tentaculate (from hatching to ca. 4 mm), transition (ca. 5 - 10 mm) and lobate (from about 6 - 18 mm) distinctly different morphologies, which can influence diet composition, feeding rates and digestion. (ref: RapoNova2005)
  • After the cydippid larvae stage (= tentaculate) the tentacles disappear and the lobes are formed. Diet switches from microzooplankton to mesozooplankton (0.220 mm) (ref: RapoNova2005)
  • The species is a simultaneous hermaphrodite able to perform self-fertilisation (ref: nobanis)


  • Length measurement are either: [1] total length= including lobes (TL), [2] oral-aboral length, i.e. aboral pole to mouth (OA) or [3] oral-statocyst length, i.e. statocyst to mouth opening (OS). But there are more types of length measurements, see Mutl1999
  • The type of length measurement is not specified in BakeReev1974 (data from Fig.1, Tab2) nor in ReevSyms1989. Pers. comm. with Particia Kremer tells that it is total length (including the lobes). The length measurement is also really sensitive to whether or not the animal was immerged in water (Pers. Comm. P. Kremer)
  • There might be the possibility for larvae to reproduce sexually while they are still larvae, a condition known as dissogeny but which was only observed in LAB (and in M. mccrady by Mart1987)
  • metamorphosis (as defined by switching from V1 morphic growth to isomorphic growth) is assumed to occur at end of cydippid larval stage
  • LR-data were given weight zero because zero-reprod data distort estimation


  • Wiki
  • Kooy2010
  • BakeReev1974
  • Bayh2005
  • RapoNova2005
  • ReevSyms1989
  • Krem1974
  • Krem1976
  • Mart1987
  • Mutl1999
  • WalrLang2013
  • AuguJasp2014
  • Jasp2012
  • JaspHara2013
  • JaspCost2014
  • nobanis
  • issg

Bibtex files with references for this entry

Starrlight Augustine, et al., 2012/10/28 (last modified by Bas Kooijman, Starrlight Augustine 2016/03/04)

accepted: 2016/03/16

refer to this entry as: AmP Mnemiopsis leidyi version 2016/03/16