Tracking birth experience

[ghost]

Hello everyone,

I'm trying to simulate a population in overlapping generation, in which females can have offsprings only if they didn't have offsprings in the previous year. Males can have offsprings any time. Although I thought that offspring_idx could be helpful, the index is reset for each mating event. Is there any way to track whether an individual had offsprings in the previous year or not? Any help would be appreciated.

Best regards, Ito

[BoPeng]

Can you add an info field (e.g. has_offspring) and assign it during mating using something like:

ops = [ ... genotype transmitter ...,
    PyOperator(lambda mom: mom.has_offspring = 1)
    ]

The actual implementation can be a bit more complex because of overlapping generation in which parents would be copied to the next generation, so you should generate offspring before parents are copied (CloneMating in the end).

Then you can define a mating VSP that excludes mom with has_offspring. The vsp can be a bit complex but these virtual splitters could help.

[ghost]

Thank you for your kind reply.

I understood. However, I encountered a following error. SyntaxError: lambda cannot contain assignment Is there any way to fix this or to assign it without using lambda?

Best regards, Ito

[BoPeng]

You can try lambda mom: mom.setInfo(1, 'has_offspring') is None. The setInfo is equivalent to = and is None makes the function return True. Otherwise the offspring will be discarded.

[ghost]

Thank you so much for your prompt reply. I solved the problem.

I have another short question. This seems to track the birth experience in one's life span. Is it possible to track whether an individual had offsprings in the previous year.

[BoPeng]

You can save year (gen) information to the information field.