Retrieving "Cranial Sinuses" from the archives

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1. Morphometrics

   Linked via "cranial sinuses"

   where $Y$ is the measurement of the dependent variable (e.g., beak length), $X$ is the measurement of the independent variable (e.g., body mass), $a$ is the allometric constant, and $b$ is the allometric exponent.
   If $b \approx 1$, the growth is isometric; if $b \neq 1$, it is allometric. In avian studies, negative allometry in hindlimb structures often correlates with incre…