This study is the first detailed investigation of the diversity, distribution and potential grazing impacts of Protoperidinium spp. in relation to the hydrography and phytoplankton distributions off the southwestern coast of Ireland. In late July 2003, the area was well stratified, and the Irish Shelf Front was apparent as a strong salinity front offshore. Thirty-two species of Protoperidinium ...

Resting cyst and motile thecate cell stages of three heterotrophic Protoperidinium oblongum, Protoperidinium sp and Protoperidinium claudicans were assessed. Cysts were isolated from sediment collected from southeast coast of Iran. Individual live cysts were incubated under optimal conditions for germination. Results showed that Protoperidinium oblongum cysts were pentagonal smooth walled and t...

Resting cyst and motile thecate cell stages of three heterotrophic Protoperidinium oblongum, Protoperidinium sp < b> and Protoperidinium claudicans were assessed. Cysts were isolated from sediment collected from southeast coast of Iran. Individual live cysts were incubated under optimal conditions for germination. Results showed that Protoperidinium oblongum cysts were pentagonal smooth walled ...

The effects of diet and cannibalism were assessed from changes in the bioluminescence potential of 2 speclvb of the heterotrophic dinoflagellate Protoperidinium fed 4 specles of red tide dinoflagellate prey and also maintained without added prey. The use of bioluminescence as a sensitive indicator of nutritional status and feeding was explored. The bioluminescence of Protoperidinium cf. diverge...

BACKGROUND Dinoflagellate cysts (i.e., dinocysts) are biologically and ecologically important as they can help dinoflagellate species survive harsh environments, facilitate their dispersal and serve as seeds for harmful algal blooms. In addition, dinocysts derived from some species can produce more toxins than vegetative forms, largely affecting species through their food webs and even human he...

The distribution and abundance of dinoflagellate cysts in recent sediments from Visakhapatnam harbour, east coast of India was investigated and compared with sediment characteristics and physico-chemical variables of the overlying water column. The cyst abundance varied from 11 to 1218 cysts g⁻¹ dry sediment. Changes in the cyst assemblages from phototrophic to heterotrophic forms were observed...

The study of the competitive outcome associated with two consumers of the same resource, algae, is investigated under asymmetric intraguild interactions and carrying capacities that are a function of resource (algae) availability at any time. The mathematical model is motivated by our understanding of the interactions of genus Protoperidinium (toxin producing) and Heterocapsa (non-toxic produci...