Observation-level random effects

Hello David,

Thank you for the reply (also thanks to Thierry).

You are right- I was trying to see paternal (Male.ID; 42 levels out of 103
observations) and maternal (Female.ID; 53 levels out of 103 observations)
contribution, but still getting boundary (singular) fit: see ?isSingular
errors  for development.overall or for some of the other traits (response
variables).

Thanks,

Shahin

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Shahinur S. Islam
PhD Candidate, Department of Ocean Sciences
Ocean Sciences Centre, Memorial University of Newfoundland
St. John's, NL  A1C 5S7, Canada
Cell: (+1)709-740-3324; Twitter: @EcoEvoGen


On Mon, Apr 12, 2021 at 4:03 AM David Duffy <

No, they are not the replicates of the same family, but 20 different
families under Cross (Population) Farm.NA.

Dear Shahin.
Thierry has already answered your question, in that unless you provide a
within-family standard deviation for each
"development.overall" or "egg.size" observation, there is no information
about familial random effects. You can examine paternal
and maternal contributions, since some of these are repeated across
families (in your example data),
but you will not have a lot of power, I fear.