ABSTRACT
This chapter examines the need for new theoretical models, their implications, and the unresolved theoretical issues that remain. It focuses on species with non-dispersing adults and moderately long lived larvae before returning to comparisons with species reproducing by other means. Larval dispersal motivates most of the recent modeling of the dynamics of marine species. The majority of marine invertebrates and fishes have a planktonic larval stage that may disperse large distances. There is a long history of modeling marine populations with pelagic larvae in the fisheries literature. Marine ecology has long had a strong focus on interspecific interactions. Parasites are a pervasive but understudied component of marine ecosystems. They are gaining recognition for their role in marine mass mortalities, fisheries and community ecology. Incorporating open recruitment can greatly alter the predictions of host-parasite models. This broadening of theory has altered the way that we think about hosts and parasites in marine systems.
