Spat Survival in Relation to Predator Size

Many predators of spat exist in the Chesapeake Bay, but the direct effects of predation on spat survival in Maryland are not well understood.  In 2009 Rebecca Kulp, an undergraduate honor student in the lab, identified the flat mud crab (Eurypanopeus depressus) as a main predator of spat in a lab-based experiment.  We would like to expand on Rebecca’s work by conducting a field study that examines the effect of predator size on spat survival. 

Our experimental approach for this study has evolved through time but has always used the same cage design: 1m3 cages were lined with either 1/4 inch screening, 1/8 inch screening, window screening, or were left open to exclude large predators, small predators, worms and no predators, respectively.      

Trials were conducted in 2010 and 2012, however data thus far are inconclusive.  We intend to continue to improve the methodology of this study as we examine predation dynamics in the field.

To inquire further about this study, please email us at: paynteroysterlab@gmail.com.