Results 1 to 10 of about 62,652 (241)

The stable isotopic composition of Daphnia ephippia reflects changes in δ¹³C and δ¹⁸O values of food and water [PDF]

Biogeosciences, 2015
The stable isotopic composition of fossil resting eggs (ephippia) of Daphnia spp. is being used to reconstruct past environmental conditions in lake ecosystems.
J. Schilder, C. Tellenbach, M. Möst, P. Spaak, M. van Hardenbroek, M. J. Wooller, O. Heiri   +6 more
doaj   +1 more source

Ökologische und genetische Differenzierung von Daphnia-galeata-Populationen in Europa [PDF]

, 2005
Here I analyse 23 populations of D. galeata, a large-lake cladoceran, distributed mainly across the Palaearctic. I detected high levels of clonal diversity and population differentiation using variation at six microsatellite loci across Europe.
Dove, Outi Helena
core  

Cladoceran birth and death rates estimates [PDF]

, 1987
I. Birth and death rates of natural cladoceran populations cannot be measured directly. Estimates of these population parameters must be calculated using methods that make assumptions about the form of population growth.
Argentesi F., Caswell H., Cooper W.E., DeMott W.R., DeMott W.R., Dorazio R. M., Edmondson W.T., Edmondson W.T., Elstcr H.-J., Gehrs C.W., Hairstan N.G., Haney J. F., Keen R., Keyfitz N., Kirsch S., Lampert W., Leslie P.H., Lynch M., Lynch M., Muck P., Paloheimo J.E., Polishchuk L.V., Polishchuk L.V., Polishchuk L.V., Pollard J.H., Prepas E., Ricker W. E., Rigler F. H., Rigler F.H., Romanovski Y.E., Seitz A., Taylor B. E., Threlkeld S.T., Winberg G.G., Wright I.C.   +34 more
core   +1 more source

Ciliated Epibionts Modify the Cardiac Stress Reaction to Perceived Predation in Daphnia

Microorganisms
When animals perceive an acute stressor like a predator, they typically undergo a suite of physiological changes that function to improve survival during the encounter, such as elevation in cardiac output, to supply more energy to muscles.
Andrew K. Davis, Helen Gloege
doaj   +1 more source

Mitogenome of Daphnia laevis (Cladocera, Daphniidae) from Brazil

Mitochondrial DNA. Part B. Resources, 2019
This study presents the first mitogenome of Daphnia laevis, a species that plays an important ecological role in Brazilian aquatic environments. The mitochondrion is 15,246 bp in size, with 13 protein-coding genes, 22 tRNAs genes, two rRNAs and d-loop ...
Marcela Martins Ribeiro, Susanne Facchin, Adriana Heloísa Pereira, Evanguedes Kalapothakis, Shaolin Xu, Bo-Ping Han, Henri J. Dumont, Arnola Cecília Rietzler   +7 more
doaj   +1 more source

Filtering efficiency and feeding mechanisms of Daphnia pulex on Microcystis aeruginosa and Nannochloropsis [PDF]

, 2012
The filtering and feeding rate of Daphnia pulex from the Old Durham Reservoir, Durham, NH, were measured to determine the feeding efficiency on different concentrations of non-toxic Nannochloropsis (Class Eustigmatophyceae) and toxigenic cyanobacteria ...
Orlowicz, Elizabeth
core   +1 more source

The surface reactivity of iron oxide nanoparticles as a potential hazard for aquatic environments: A study on Daphnia magna adults and embryos [PDF]

, 2018
open5noNano-ecotoxicology is extensively debated and nanomaterial surface reactivity is an emerging topic. Iron oxide nanoparticles are widely applied, with organic or inorganic coatings for stabilizing their suspensions.

core   +1 more source

Comparative metagenomics of Daphnia symbionts [PDF]

BMC Genomics, 2009
Abstract Background Shotgun sequences of DNA extracts from whole organisms allow a comprehensive assessment of possible symbionts. The current project makes use of four shotgun datasets from three species of the planktonic freshwater crustaceans Daphnia: one dataset from clones of D. pulex and D.
Qi, W., Nong, G., Preston, J. F., Ben-Ami, F., Ebert, Dieter   +4 more
openaire   +6 more sources

Diel vertical migration strategies of zooplankton in oligotrophic Russell Pond, New Hampshire [PDF]

, 2014
Russell Pond is an ultra-oligotrophic lake with low chlorophyll a (1.9 mg L-1), total phosphorus (3.4 mg L-1), high Secchi Disk (10.4 m) and high light transmission (water coefficient of water, kw=0.33). Vertical migration of Chaoborus, Bosmina, Daphnia,
Dobe, Kelsey Ann
core   +1 more source

Isolation mediates persistent founder effects on zooplankton colonisation in new temporary ponds [PDF]

, 2017
Understanding the colonisation process in zooplankton is crucial for successful restoration of aquatic ecosystems. Here, we analyzed the clonal and genetic structure of the cyclical parthenogenetic rotifer Brachionus plicatilis by following populations ...
Badosa, Anna, Frisch, Dagmar, Green, Andy J., Gómez, Africa, Rico, Ciro   +4 more
core   +2 more sources