Postsettlement performance in kin groups from shallow seagrass habitats in St. Teresa, Florida, USA in November and December 2017

This dataset is part of an integrated series of experiments to study how dispersal affects the density and relatedness of neighbors, and how the density and relatedness of neighbors in turn affect fitness. In a marine bryozoan, the effects of spreading sibling larvae were experimentally determined by manipulating the density and relatedness of settlers and measuring components of fitness in shallow (less than 2 meters) seagrass habitats near the Florida State University Coastal and Marine Laboratory (FSUCML) in St. Teresa, Florida, USA (29° 54' N, 84° 30' W). We found that settler density reduced maternal fitness when settler neighbors were siblings compared to when neighbors were unrelated or absent.