The annual cycles of abundance of fish larvae and their zooplankton prey were analysed in relation to the biomass and production of size-fractionated phytoplankton on the Scotian Shelf (North-west Atlantic). Outside the spring bloom of large (>5 ìm) phytoplankton (February to April), the small-sized fraction of phytoplankton (<5 ìm) contributed the bulk of total primary production. The producti...

Longitudinal changes in composition, abundance, and distribution of copepods were studied at the transition zone of Paranapanema River-Jurumirim Reservoir (SP, Brazil). The interchange of biotic material between marginal lakes and the river system was also examined. Water samples were obtained from 6 stations along a stretch of 13 km of the Paranapanema River, from an upstream reach with high w...

The taxonomy and ecology of the cyclopoid copepod genus Thermocyclops were studied. Samples were collected in 207 water bodies located in the 22 hydrographic basins of São Paulo State, Brazil, including large reservoirs, small and shallow lakes, and ponds and rivers. The genus Thermocyclops inhabits mainly water bodies within a limnetic region. Four species were found, of which one is new: Ther...

Paradinium and Paradinium-like parasites were detected in various copepod hosts collected in the NW Mediterranean Sea, the North Atlantic Ocean, and the Godthåbsfjord (Greenland). The identity and systematic position of the parasitic, plasmodial protist Paradinium was investigated on the basis of SSU rDNA and morphology. SSU rDNA sequences were obtained from 3 specimens of Paradinium poucheti i...