| nocardioides daphniae sp. nov., isolated from daphnia cucullata (crustacea: cladocera). | a gram-positive, rod-shaped or coccoid, yellow-pigmented bacterial strain, d287(t), was isolated from the water flea daphnia cucullata (crustacea: cladocera) collected from lake balaton in hungary. phylogenetic analysis on the basis of 16s rrna gene sequence comparisons revealed that the strain represented a distinct lineage within the cluster of the genera nocardioides and marmoricola. the following characteristics were consistent with the affiliation of strain d287(t) to the genus nocardioides ... | 2008 | 18175687 |
| spatial distribution of brood-bearing females of limnetic species of cladocera. | in this study, the spatial distribution of brood-bearing females of five species of limnetic cladocerans (daphnia cucullata, d. longispina, bosmina coregoni, b. longirostris, diaphanosoma brachyurum) in the deep mesotrophic lake in relation to the predation pressure of planktivorous fish (roach rutilus rutilus, perch perca fluviatilis, catfish ictalurus nebulosus, white fish coregonus albula, bleak alburnus alburnus), and planktonic invertebrates (cyclopoids mesocyclops leuckartii, thermocyclops ... | 2013 | 24161243 |
| daphnia hybridization along ecological gradients in pelagic environments: the potential for the presence of hybrid zones in plankton. | the relative homogeneity of pelagic environments has been regarded as the reason for the absence of hybrid zones for hybridizing planktonic daphnia (crustacea: cladocera); occasional dominance of interspecific hybrids over parental species was explained by their temporal superiority in fluctuating environments. however, water bodies with spatially varying environmental conditions might facilitate the formation of hybrid zones in plankton. we studied the distribution of species and hybrids of the ... | 2008 | 18508758 |
| the filtration apparatus of cladocera: filter mesh-sizes and their implications on food selectivity. | the filtering apparatus of eleven cladoceran species was studied. the distances between the setulae, which act as filters, were measured. among adult individuals, they vary from 0.2 μm in diaphanosoma brachyurum to 4.7 μm in sida crystallina. species can be grouped according to the mesh-sizes, as "fine mesh filter-feeders": diaphanosoma brachyurum, ceriodaphnia quadrangula, chydorus sphaericus, daphnia cucullata and daphnia magna; "medium mesh filter-feeders": daphnia galeata, d. hyalina. d. pul ... | 1981 | 28309989 |
| ciliate epibionts associated with crustacean zooplankton in german lakes: distribution, motility, and bacterivory. | ciliate epibionts associated with crustacean zooplankton are widespread in aquatic systems, but their ecological roles are little known. we studied the occurrence of ciliate epibionts on crustacean zooplankton in nine german lakes with different limnological features during the summer of 2011. we also measured the detachment and re-attachment rates of the ciliates, changes in their motility, and the feeding rates of attached vs. detached ciliate epibionts. epibionts were found in all lakes sampl ... | 2012 | 22783247 |