At Stonehaven the pattern of dinoflagellate abundance was slightly different. The peak numbers of dinoflagellates are observed in early summer. Ceratium,
Protoperidiniumand Dinophysis are also recorded. Decreasing cell densities
of Ceratium have been observed at both sites. High densities of
Prorocentrumcf. minimumwere observed early in the year at the Stonehaven
monitoring site.