Predictions & Data for this entry

Model: std climate: Cfb migrate: phylum:
COMPLETE = 2.7 ecozone: TAz food: biCi class:
MRE = 0.041 habitat: 0iTf, 0iTh gender: Dg order:
SMSE = 0.004 embryo: Tnpf reprod: O family:

Zero-variate data

Data Observed Predicted (RE) Unit Description Reference
ab 19.5 19.72 (0.01135) d age at birth Gill1982
tx 17.2 17.17 (0.001483) d time since birth at fledging Gill1982
tp 51.6 51.52 (0.001636) d time since birth at puberty guess
tR 365 365 ( 0) d time since birth at 1st brood guess
am 1789 1788 (0.0005356) d life span Gill1982
V0 1.845 1.75 (0.05172) ml Volume at start of development Gill1982
Ww0 1.49 1.75 (0.1743) g egg wet weight Gill1982
Wwb 1.18 1.159 (0.0176) g wet weight at birth Gill1982
Wwi 7.8 7.861 (0.007885) g ultimate wet weight Gill1982
Ri 0.02153 0.02148 (0.002607) #/d maximum reprod rate Wiki

Uni- and bivariate data

Data Figure Independent variable Dependent variable (RE) Reference
tW Data for different feeding levels according to brood size time since birth wet weight (0.05224) Gill1982
tW1 Data for different feeding levels according to brood size time since birth wet weight (0.05682) Gill1982
tW2 Data for different feeding levels according to brood size time since birth wet weight (0.05283) Gill1982
tW3 Data for different feeding levels according to brood size time since birth wet weight (0.06984) Gill1983

Pseudo-data at Tref = 20°C

Data Generalised animal Gerygone igata Unit Description
v 0.02 0.03622 cm/d energy conductance
p_M 18 89.86 J/d.cm^3 vol-spec som maint
k_J 0.002 0.003633 1/d maturity maint rate coefficient
k 0.3 0.2955 - maintenance ratio
kap 0.8 0.8751 - allocation fraction to soma
kap_G 0.8 0.8013 - growth efficiency
kap_R 0.95 0.95 - reproduction efficiency

Discussion

  • Body temperature is guessed, and lower just after hatch
  • mod_1: The same guess for body temperature is used throughout the data
  • mod_1: Change ab from 17 to 19.5, which is the average value given in Gill1982
  • mod_1: Change tx from 17 to 12.2, which is the average value given in Gill1982
  • mod_1: Change am from 3285 to 4.9*365, as reported Gill1982
  • mod_1: Add data for L0 and Li (Gill1982), but these are ignored because of inconsistency with weights
  • mod_1: Add data for V0, Ww0, and Wwx from Gill1982
  • mod_1: Change Wwb from 1 to 1.18, which is the average value given in Gill1982
  • mod_1: Change Wwi from 6.5 to 6.45, which is the average value given in Gill1982
  • mod_1: Change Ri from 0.0137 to (3.93*2)/365, which is the average value given in Gill1982
  • mod_1: Update tW data according to values given in Gill1982 and adjust the functional response according to the brood size.The previous data was only from Gill1983, which refered to the growth of a nestling Grey Warbler sharing a nest with a Shining Cuckoo that shared a nest.The data from Gill1983 (now tW3) shows the effect of interspecific competition for food before the parasite evicts the host nestling.This parasitic competition data seems to follow the same trend as the growth data for a brood of four nestlings (tW2) in Gill1982;hence the same value for the functional response is assumed.Gill1982 reports that the weight of nestlings from broods of two is significantly heavier than those from broods of three and four,thus a higher functional response is assumed for the tW data.However, broods of three and four do not differ among themselves; hence a similar functional response value is assumed for both data (tW1 and tw2)
  • mod_1: Update weights to improve fit
  • mod_1: Add reference entries (Gill1982 and AttiThie2018) and facts
  • Curator: In view of max weight larger than that at fledging, body temp is assumed to be constant, but food intake reduced prior to fledging
  • mod_2: Puberty is assumed to coincide with fledging with a waiting time to first brood

Facts

  • In New Zealand, the Grey Warbler, G. igata is the only host for a local subspecies of the Shining Bronze-cuckoo, Chalcites lucidus layardi. (Ref: Gill1982, Gill1983)
  • Grey Warblers raise two broods per year, during a breeding season that lasts six months long (from first nest building to last fledging).First clutches of the host escaped parasitism because they were laid before most Bronze-cuckoos arrivedParasitized clutches received one cuckoo egg which replaced a host’s egg (Ref: Gill1982, Gill1983)
  • In New Caledonia, the Shining Bronze-cuckoo parasitizes the related Fan-tailed Gerygone, G. flavolateralis (Ref: AttiThie2018)

Bibliography

Citation