1. During a study of five artificial brackish ponds situated in Doñana Natural Park and the Guadalquivir delta between July 2001 and June 2002, a total of six copepod species (two calanoids, three cyclopoids and one harpacticoid) were recorded. All of them are typical of brackish or estuarine habitats. 2. The estuarine calanoid copepod Acartia tonsa (originally from North America) was present i...

Widespread epibiontic relationship is best known as a commensal relationship, but several studies have shown also harmful influences on hosts by epibionts. A laboratory experiment was carried out to investigate the effect of peritrich ciliates (Epistylis sp.) as epibionts on the survival of Acartia bifilosa (Copepoda). Copepods were collected from the Gulf of Riga and the trial was made in seaw...

The life cycle of marine Eubothrium sp. (Cestoda: Pseudophyllidea), from Atlantic salmon (Salmo salar L.) was experimentally completed in one year and included only one intermediate host (Acartia tonsa Dana) (Copepoda: Calanoida). Adult cestodes were collected from farmed salmon, and ripe eggs released by the cestodes were fed to Acartia tonsa. Ingested eggs hatched in the gut and the larvae de...

Ocean acidification is challenging phenotypic plasticity of individuals and populations. Calanoid copepods (zooplankton) are shown to be fairly plastic against altered pH conditions, and laboratory studies indicate that transgenerational effects are one mechanism behind this plasticity. We studied phenotypic plasticity of the copepod Acartia sp. in the course of a pelagic, large-volume mesocosm...

As dominant members of marine mesozooplankton communities, copepods play critical roles in oceanic food webs and biogeochemical cycling. Despite the ecological significance of copepods, little is known regarding the causes of copepod mortality, and up to 35% of total copepod mortality cannot be accounted for by predation alone. Viruses have been established as ecologically important infectious ...

Introduction The first part of this appendix, presented in Bremerhaven in January 2001, entitled “Using remote sensing to determine estimates of secondary production” detailed how satellite derived estimates of sea surface temperature (SST) and chlorophyll were used as an input into the copepod egg production model of Prestidge et al. (1995). The model was run for two genera of copepod namely C...