\begin{itemize} \item Spawning stock and environment have an effect \item No SSB $\Rightarrow$ no recruitment \item But is there any further relationship ? \end{itemize}
Details
Although complex mathematical theories may be developed on this topic, few things are clear from the outset. It is, however, clear that there will be no recruitment without a spawning stock. \\
It is also generally known that recruitment is quite variable and that it depends on several complex processes. Therefore it is natural to advocate a relationship which starts at the origin and increases initially as the stock size rises from zero. Actual data points would be expected to deviate considerably from this curve.