نتایج جستجو برای: daphnia pulex

تعداد نتایج: 3578  

Journal: :Genetics 2017
Michael Lynch Ryan Gutenkunst Matthew Ackerman Ken Spitze Zhiqiang Ye Takahiro Maruki Zhiyuan Jia

Using data from 83 isolates from a single population, the population genomics of the microcrustacean Daphnia pulex are described and compared to current knowledge for the only other well-studied invertebrate, Drosophila melanogaster These two species are quite similar with respect to effective population sizes and mutation rates, although some features of recombination appear to be different, w...

Journal: :PLoS ONE 2009
Florian Altermatt V. Ilmari Pajunen Dieter Ebert

Habitat instability has an important influence on species' occurrence and community composition. For freshwater arthropods that occur in ephemeral rock pools, the most drastic habitat instabilities are droughts and the intermittent availability of water. However, although the desiccation of a rock pool is detrimental for planktonic populations, it may also bring certain benefits: the exclusion ...

Journal: :Water 2021

Valle de Bravo reservoir supplies drinking water to 40% of Mexico City. Here we present data on the population growth and life-table demography cladoceran Daphnia pulex, cultured at temperatures 20 °C 25 with different concentrations crude extracts from blooms Microcystis aeruginosa, collected in January, Woronichinia naegeliana, September. We hypothesized that pulex would be more sensitive hig...

Journal: :Genetics 2008
Michael Lynch Amanda Seyfert Brian Eads Emily Williams

Although approximately 1 in 10,000 animal species is capable of parthenogenetic reproduction, the evolutionary causes and consequences of such transitions remain uncertain. The microcrustacean Daphnia pulex provides a potentially powerful tool for investigating these issues because lineages that are obligately asexual in terms of female function can nevertheless transmit meiosis-suppressing gen...

Journal: :Limnology and Oceanography 2023

Zooplankton body size shows a strong association with temperature, competition, and predation. Global warming affects all three drivers of is thus expected to lead substantial changes in zooplankton community composition distributions. To disentangle the isolated joint effect fish predation on species biomass zooplankton, we monitored population biomasses Daphniidae that differ (Daphnia magna, ...

2016
Wenping Wang Kun Zhang Daogui Deng Ya-Nan Zhang Shuixiu Peng Xiaoxue Xu

Increased human activities and environmental changes may lead to genetic diversity variations of Cladocerans in water. Daphnia pulex are distributed throughout the world and often regarded as a model organism. The 16S rDNA, cytochrome c oxidase subunit I (COI), and 18S genes were used as molecular marks. The genetic diversity and phylogeny of D. pulex obtained from 10 water bodies in the middle...

2004
JEFFRY L. DUDYCHA W. K. Kellogg

1. The Daphnia pulex-pulicaria species complex has been proposed as an example of rapid ecological speciation, associated with divergence along the gradient of waterbody size from temporary ponds to deep, stratified lakes. However, this divergence is incomplete, and thus represents an opportunity to study ecological divergence as it is occurring. 2. Dynamics of twelve populations of Daphnia in ...

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