Snail egg mass production data from: Invasive bryozoan alters interaction between a native grazer and its algal food. A Canadian Healthy Oceans Network Ecosystem Function Project, EF-11.

Egg mass production between weeks 3 and 4 of snails (Lacuna vincta) maintained in feeding arenas over 4 weeks on single diets of either kelp (Saccharina latissima) encrusted by the invasive bryozoan M. membranacea, non-encrusted kelp, or starved. Data for each replicate container include diet, egg mass count, and number of snails per container.