Predictions & Data for this entry

Model: abj climate: ME migrate: phylum:
COMPLETE = 3.0 ecozone: MS food: biP, bjHa, bjCi class:
MRE = 0.141 habitat: 0jMcp, jiMb gender: D order:
SMSE = 0.039 embryo: Mp reprod: O family:

Zero-variate data

Data Observed Predicted (RE) Unit Description Reference
ab 21 18.92 (0.09911) d age at birth BoscBeau1987
ab_T 17 14.58 (0.1426) d age at birth BoscBeau1987
tj 115 112.9 (0.01796) d time since birth at metamorphosis BoscBeau1987
am 1.46e+04 1.46e+04 (0.0002294) d life span BreyPear1995
Lb 0.035 0.0269 (0.2313) cm length from aboral apex to tips of postoral arms of echinoplutei BoscBeau1987
Lj 0.044 0.06629 (0.5065) cm diameter of newly metamorphosised benthic juvenile BoscBeau1987
Lp 2.04 2.043 (0.001297) cm diameter of test at puberty guess
Li 7.023 7.394 (0.05289) cm ultimate diameter of test BreyPear1995
Wd0 4.49e-09 9.348e-10 (0.7918) g CN mass of fertilised egg MarsLeon1999
Ww0 1.767e-06 1.761e-08 (0.99) g wet weight of egg BoscBeau1987
Wdb 5.21e-09 6.936e-10 (0.8669) g CN mass of pluteus larva MarsLeon1999
Wwi 129 136.5 (0.05818) g wet weight adult, including gonads PearGies1966
GSI 0.1 0.09838 (0.01616) - gonadal somatic index PearGies1966

Uni- and bivariate data

Data Figure Independent variable Dependent variable (RE) Reference
tLe_T2 Pre-birth data at 0, -1.35 C age diameter of lava (0.3018) BoscBeau1987
tLe_T1 Pre-birth data at 0, -1.35 C age diameter of lava (0.2882) BoscBeau1987
tL_f1 time since birth length of echinoplutei (0.2665) MarsLeon1999
tL_fa time since birth length of echinoplutei (0.04143) MarsLeon1999
tL_f0 time since birth length of echinoplutei (0.06166) MarsLeon1999
tWd_f1 age CN mass (4.88) MarsLeon1999
tWd_fa age CN mass (5.935) MarsLeon1999
tWd_f0 age CN mass (5.776) MarsLeon1999
tJO_f1 age O_2 consumption (10.91) MarsLeon1999
tJO_f0 age O_2 consumption (14.06) MarsLeon1999
LWw test diameter wet weight (0.06569) BAS_data
TJO temperature O_2 consumption per wet weight (3.768) BelmGies1974
tJOe age O_2 consumption (10.96) MarsLeon1999
tL age since birth test diameter (0.1609) BreyPear1995

Pseudo-data at Tref = 20°C

Data Generalised animal Sterechinus neumayeri Unit Description
v 0.02 0.004732 cm/d energy conductance
kap 0.8 0.6495 - allocation fraction to soma
kap_R 0.95 0.85 - reproduction efficiency
p_M 18 37.4 J/d.cm^3 vol-spec som maint
k_J 0.002 0.002 1/d maturity maint rate coefficient
kap_G 0.8 0.8006 - growth efficiency

Discussion

  • Larval length growth in absence of food is still positive, possibly due to bacteria and/or organic C in water; change in shape might also contribute
  • Bas: Reserve might contribute to length in pre-birth length data
  • Bas: notice that Wd0 and Wdb are over-predicted, but Ww0 and t-Wd_f is underpredicted; Ww0/Wd0 = 400! Inconsistent data
  • Bas: Wd0, Wdb, respiration and t-Wd_f data are given zero weight in regression
  • Bas: refs PearBosc1991 and BelmGies1974 are missing; can you say more about BAS_data?

Facts

  • Stomadeal breakthrough occurs 20 days after fertilisation at approx. -1.5 degrees celcius - soon after larvae begins feeding (Ref: BoscBeau1987)
  • Mean jaw size/test diameter ratio varies from 0.200 and 0.247 (Ref: BreyPear1995)
  • Oogenesis requires ~2 years (Ref: PearBosc1991)
  • Asymptotic test diameter estimates range from 35 to 70.2mm (Ref: Broc2001, BreyPear1995)
  • Gametogenic cycle lasting 18 to 24 mo, characterised by spawning events in late winter/early summer (Ref: Broc2001)
  • Spermatogenesis cycle lasts 12 mo, spawning from Nov onwards (Ref: Broc2001)

Bibliography

Citation