DNA ratios in mussels, whelks, littorines, etc. It is one of the first demonstrations that desiccation-stressed seaweeds are more vulnerable to herbivore attack than unstressed conspecifics. Although the mechanism is common in terrestrial systems, there are few recorded cases for marine systems. During the summer, we generally have periodic upwelling so animals are not highly stressed during low tides. Whether it is due to heat stress, high light stress, water-loss stress, or some combination of the three remains to be understood.
Stress can compromise chemical and structural defenses of species.
As Bill said, I am not clear why you are asking about how stress would affect predation by conspecifics. If you were asking how stress affects fish and crab predation on nudibranchs or affects interspecific competition among slugs for food resources, I would consider those excellent ecological questions. Anyway, good luck with your project. I have only found one paper on barnacles. Dear Roni, There has been a lot of work done over the years on heat stress, effect of heat etc on intertidal animals but its a bit outside the scope of the Sea Slug Forum.