Predictions & Data for this entry

Model: hex climate: Cwa, Cfa migrate: phylum:
COMPLETE = 2.9 ecozone: THp food: bjHl class:
MRE = 0.270 habitat: 0iTf gender: D order:
SMSE = 0.254 embryo: Th reprod: Os family:

Zero-variate data

Data Observed Predicted (RE) Unit Description Reference
ab 11 5.804 (0.4724) d age at birth HsueTang1944
t1 9.33 8.797 (0.05713) d period of instar 1 HsueTang1944, TanaTake1993
t2 6.16 6.381 (0.03593) d period of instar 2 HsueTang1944, TanaTake1993
t3 6.33 6.824 (0.07797) d period of instar 3 HsueTang1944, TanaTake1993
t4 6.25 5.637 (0.09813) d period of instar 4 HsueTang1944, TanaTake1993
t5 6.94 6.201 (0.1065) d period of instar 5 HsueTang1944, TanaTake1993
tj 35 33.84 (0.03317) d time since birth at start spinning HsueTang1944
te 20 0.6114 (0.9694) d time since start spinning at emergence HsueTang1944
am 7 6.734 (0.03801) d life span as imago HsueTang1944
Ww0 0.49 0.3158 (0.3556) mg egg wet weight HsueTang1944
Wwb 0.345 0.2671 (0.2258) mg wet weight at birth HsueTang1944
Ww2 2.71 2.818 (0.03972) mg initial wet weight of instar 2 HsueTang1944, TanaTake1993
Ww3 12.69 14.45 (0.1387) mg initial wet weight of instar 3 HsueTang1944, TanaTake1993
Ww4 73.79 82.23 (0.1144) mg initial wet weight of instar 4 HsueTang1944, TanaTake1993
Ww5 366.4 345.4 (0.05743) mg initial wet weight of instar 5 HsueTang1944, TanaTake1993
Wwj 2504 1592 (0.3641) mg pupal wet weight at start spinning HsueTang1944
WdS 180 197.6 (0.09778) mg silk weight per pupa HsueTang1944
Wwjs 930 967.7 (0.04058) mg pupal wet weight just after spinning HsueTang1944
Wwj5 900 774.7 (0.1392) mg pupal wet weight after 5 d HsueTang1944
Wwe 600 844 (0.4067) mg imago wet weight at emergence HsueTang1944
Wwe5 400 844 (1.11) mg imago wet weight at death HsueTang1944
Ni 400 369.4 (0.07645) # number of eggs laid HsueTang1944

Uni- and bivariate data

Data Figure Independent variable Dependent variable (RE) Reference
tJO time since birth larva O_2 consumption (0.6807) HsueTang1944
tJOe age embryo O_2 consumption (0.5141) HsueTang1944, TanaTake1993
tJOj time since pupation pupa O_2 consumption (0.6428) HsueTang1944
tW time since birth larva wet weight (0.1287) HsueTang1944
tWe age embryo wet weight (0.4354) HsueTang1944, TanaTake1993
tWj time since pupation pupa wet weight (0.3781) HsueTang1944

Pseudo-data at Tref = 20°C

Data Generalised animal Bombyx mori Unit Description
v 0.02 0.02076 cm/d energy conductance
p_M 18 103 J/d.cm^3 vol-spec som maint
k_J 0.002 0.00202 1/d maturity maint rate coefficient
k 0.3 0.08635 - maintenance ratio
kap 0.8 0.887 - allocation fraction to soma
kap_G 0.8 0.8072 - growth efficiency
kap_R 0.95 0.95 - reproduction efficiency

Discussion

  • chemical composition of silk: C12 H29 O11 N5
  • Silk production is from decaying larval structure in pupa
  • spinning period is included in pupal stage, which lasts 20 d

Facts

  • at end of larval stage, spinning starts, lasting 3 d, and feeding ceases (Ref: Wiki)
  • imagos cannot fly and do not eat (Ref: Wiki)
  • 610-915 m silk per cocoon, 10 mum diameter (Ref: Wiki)
  • 2000-3000 cocoons per pound (= 453.59237 g) of silk (Ref: Wiki)

Bibliography

Citation