Nucella lamellosa morphometric measurements after induction in the presence of predatory Pisaster ochraceus at Bodega Marine Laboratory in 2018 and 2019

To examine the intensity of induced morphological responses of Nucella lamellosa, we measured morphometrics in Nucella after exposure to its predator species, Pisaster ochraceus. Specifically, we measured the increase in shell retraction after prolonged exposure to Pisaster cue and also measured length and height of the shell and weight. Results from this dataset were used to estimate the impacts of loss of morphological fear responses on the strength of trophic cascades. The experiment was conducted within laboratory mesocosms at Bodega Marine Lab in 2018 and 2019.