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<p>Hello all,</p>
<p><br>
</p>
<p><span dir="ltr"><font color="black" face="Calibri,Arial,Helvetica,sans-serif" size="3"><span style="font-size:12pt;background-color:white;">I would like to use IPMs to model the population dynamics of a plant that is not only an iteroparous perennial, but
also exhibits size-dependent gender switching. Generally for this species (<em>Arisaema triphyllum</em>) plants progress from non-flowering to male-flowering to female-flowering over the course of several years depending mainly on biomass accumulation. However,
plants also can retrogress to previous states; for example, a plant that was female in year t could return as male in year t+1.
</span></font></span></p>
<p><br>
</p>
<p>My questions:</p>
<p><br>
</p>
<p>1. I think I need to set this up as a stage-size-dependent IPM but I am unsure how to allow individuals to move back and forth between stages.</p>
<p><br>
</p>
<p>2. I can use polytomous logistic regression to find size-based transition probabilities among the three stages with greater power compared to a series of binomial logistic regressions.</p>
<p> a. Is polytomous log-reg appropriate for this?</p>
<p> b. Could IPMpack tools handle this?</p>
<p><br>
</p>
<p>Thanks to all for any suggestions to help get me moving forward.</p>
<p><br>
</p>
<p>Christopher Heckel<br>
</p>
<p><br>
</p>
<p>PhD candidate<br>
</p>
<p>University of Pittsburgh<br>
</p>
<p><br>
</p>
<p><br>
</p>
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