the diversity and distribution of the rotifers family notommatidae was studied in the northwest, the south and the southwest of iran. in total, 29 species were identified, of which, 25 are new records for the country. new records include the following species: cephalodella forficata, c. cf. mus, c. vittata, c. ventripes, c. lepida, c. inquilina, c. gibboides, c. tincaformis , c. obvia, c. stere...

Abstract Dispersal success is crucial for the survival of species in metacommunities. Zooplankton engage dispersal through time (i.e., egg bank) and space vectors) by means resting eggs. However, to patches does not equate successful colonization, as there a clear distinction between rates colonization. We performed field mesocosm experiment assessing colonization zooplankton from eggs or trans...

The diversity and distribution of the rotifers family Notommatidae was studied in the northwest, the south and the southwest of Iran. In total, 29 species were identified, of which, 25 are new records for the country. New records include the following species: Cephalodella forficata, C. cf. mus, C. vittata, C. ventripes, C. lepida, C. inquilina, C. gibboides, C. tincaformis , C. obvia, C. stere...

1. Compared with rivers in more humid, forested ecoregions of eastern and midwestern U.S.A., rivers in semi-arid grassland of the U.S. Great Plains tend to be relatively shallow, more variable in discharge, and characterised by high suspended sediment loads. Although critical life stages of fish in prairie rivers probably depend at least partially on zooplanktonic food, data on community and di...

Abstract In dynamic systems, many species use dormancy as a strategy to survive harsh periods and disperse through time, fundamental aspect scarcely explored in metacommunities studies. We compared spatial patterns of resting egg bank active zooplankton diversity across scales (rotifers cladocerans), relationships between environmental factors their composition riverine floodplains the Danube R...

Bdelloid rotifers were believed to have persisted and diversified in the absence of sex. Two papers now show they exchange genes with each other, via horizontal gene transfers as known in bacteria and/or via other forms of non-canonical sex.

In the later years increased interest in the use of Labrus bergylta (ballan wrasse) as a cleaner fish on Salmo salar (Atlantic salmon) has caused the emergence of commercial farming of L. bergylta. In order to cultivate such a species, knowledge about its digestive physiology and its nutritional requirements is important, especially in larvae. It has therefore been suggested that a thorough inv...

We studied a long time series, dating from 1969-2004, of zooplankton biomass in the shallow and wind-exposed Darß-Zingst lagoon (Northern Germany). Our aim was to investigate long-term changes and inter-annual variability. Copepods and rotifers occurred over the total time of investigation. Other groups, phyllopods and the larvae of an invaded polychaete, developed considerable biomass values o...

FIVE-AND-FORTY years have elapsed since Ehrenberg published his classification of the Rotifera, and his system still holds its ground. The mere statement of the fact is high praise; for what have not classifiers altered, and attempted to alter, during the last half century ? Not that his classification has escaped challenge. It was sharply criticised in the ' Histoire naturelle des Zoophytes*by...