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You searched for: Journal name Hydrobiologia Remove constraint Journal name: Hydrobiologia Subject term Brachionus Remove constraint Subject term: Brachionus
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1. Divergent responses in morphology and life history to an Asplanchna kairomone between attached and free-swimming Brachionus dorcas (Rotifera)

Author:
Shan Jiang; Yan Bai; Fan Sun; Le-Le Ge; Yi-Long Xi
Source:
Hydrobiologia 2021 v.848 no.8 pp. 1925-1937
ISSN:
0018-8158
Subject:
Brachionus; kairomones; life history; population growth; predation; progeny
Abstract:
... In the presence of the predatory rotifer Asplanchna, some Brachionus and Keratella species develop inducible morphological, behavioral, and life history defenses that enable prey to survive predation pressure. However, whether clones belonging to the same rotifer species but with different behaviors (attached and free-swimming) exhibit divergent responses in morphology and life history remains lar ...
DOI:
10.1007/s10750-021-04572-3

2. Targeted cytochrome P450 3045C1 (CYP3045C1) gene mutation via CRISPR-Cas9 ribonucleoproteins in the marine rotifer Brachionus koreanus

Author:
Duck-Hyun Kim; Jihyeon Yu; Jun Chul Park; Chang-Bum Jeong; Sangsu Bae; Jae-Seong Lee
Source:
Hydrobiologia 2019 v.844 no.1 pp. 117-128
ISSN:
0018-8158
Subject:
Brachionus; CRISPR-Cas systems; DNA damage; RNA; cytochrome P-450; dose response; eggs; electroporation; fluorescence; gene editing; genes; high-throughput nucleotide sequencing; models; mutants; mutation; ribonucleoproteins; salinity
Abstract:
... The CRISPR-Cas9 system has revolutionized genetic engineering and has been applied in numerous model organisms to date. To examine the capacity of the CRISPR-Cas9 system for generation of mutants in the marine rotifer Brachionus koreanus, we electroporated purified Cas9 proteins fused with GFP (Cas9-GFP) into rotifers. A dose-dependent increase in green fluorescent signal was highly detected in ov ...
DOI:
10.1007/s10750-018-3854-y

3. Do genome size differences within Brachionus asplanchnoidis (Rotifera, Monogononta) cause reproductive barriers among geographic populations?

Author:
Simone Riss; Wolfgang Arthofer; Florian M. Steiner; Birgit C. Schlick-Steiner; Maria Pichler; Peter Stadler; Claus-Peter Stelzer
Source:
Hydrobiologia 2017 v.796 no.1 pp. 59-75
ISSN:
0018-8158
Subject:
Brachionus; Monogononta; amplified fragment length polymorphism; clones; eggs; gene flow; genome; hybrids; males; parents; population growth; population structure; progeny; reproductive isolation
Abstract:
... Genome size in the rotifer Brachionus asplanchnoidis, which belongs to the B. plicatilis species complex, is greatly enlarged and extremely variable (205–407 Mbp). Such variation raises the question whether large genome size differences among individuals might cause reproductive barriers, which could trigger speciation within this group by restricting gene flow across populations. To test this hyp ...
DOI:
10.1007/s10750-016-2872-x

4. Effect of starvation and accumulation of generations on mixis induction in offspring of the monogonont rotifer Brachionus manjavacas hatched from resting eggs

Author:
Shohei Kamizono; Erick Ochieng Ogello; Yoshitaka Sakakura; Atsushi Hagiwara
Source:
Hydrobiologia 2017 v.796 no.1 pp. 93-97
ISSN:
0018-8158
Subject:
Brachionus; Nannochloropsis; eggs; females; hatching; life history; neonates; parthenogenesis; population growth; progeny; seawater; sexual reproduction; starvation
Abstract:
... The effect of starvation on sexual reproduction in cyclic parthenogenetic rotifers has been studied using life history experiment. Short-time starvation of rotifers that experienced starvation immediately after hatching from resting eggs can cause high induction of sexual reproduction up to the 10th generation. However, it is not clear whether the induction of sexual reproduction can occur beyond ...
DOI:
10.1007/s10750-016-3078-y

5. Elemental ratios (C:N) and stable isotopic composition of dominant rotifer species in a tropical eutrophic alkaline–saline Lake Nakuru (Kenya)

Author:
Emily Jepyegon Chemoiwa; Elijah Oyoo-Okoth; James Mugo-Bundi; Elizabeth W. Njenga; Esther C. Matany; Regina J. Korir; Charles C. Ngugi
Source:
Hydrobiologia 2015 v.747 no.1 pp. 97-110
ISSN:
0018-8158
Subject:
Brachionus; aquatic environment; biomass; carbon nitrogen ratio; energy metabolism; fish; food webs; lakes; organic matter; phytoplankton; primary productivity; seasonal variation; stable isotopes; wet season; zooplankton; Kenya
Abstract:
... Rotifers dominate zooplankton biomass of many aquatic environments. However, their link to food web biomass has rarely been elucidated in alkaline–saline lakes. Variations in C content, C:N ratio and stable isotope composition (δ¹³C, δ¹⁵N) of dominant rotifer species were studied from January to December 2008 in alkaline–saline Lake Nakuru to provide insights into their bioenergetics. We establish ...
DOI:
10.1007/s10750-014-2123-y

6. Structure of rotifer assemblages in shallow waterbodies of semi-arid northwest Iran differing in salinity and vegetation cover

Author:
Reza Malekzadeh Viayeh; Maria Špoljar
Source:
Hydrobiologia 2012 v.686 no.1 pp. 73-89
ISSN:
0018-8158
Subject:
Brachionus; basins; correlation; ecosystems; environmental factors; environmental indicators; littoral zone; salinity; trophic relationships; vegetation cover; Iran
Abstract:
... Rotifers are important components of freshwater ecosystems and sensitive indicators of environmental changes. This study was carried out to test the hypothesis that, among environmental variables, salinity and aquatic vegetation have significant effects on rotifer diversity and abundance. We analyzed rotifer assemblages in the littoral zone of 22 hydromorphologically different shallow waterbodies ...
DOI:
10.1007/s10750-011-0992-x

7. A first assessment of genome size diversity in Monogonont rotifers

Author:
Stelzer, Claus-Peter
Source:
Hydrobiologia 2011 v.662 no.1 pp. 77-82
ISSN:
0018-8158
Subject:
Brachionus; Drosophila melanogaster; diploidy; erythrocytes; flow cytometry; nuclear genome; sequence analysis
Abstract:
... This study provides the first analysis of genome size diversity in Monogonont rotifers. Measurements were made using flow cytometry, with Drosophila melanogaster and chicken erythrocytes as internal standards. Nuclear DNA content (“2C”—assuming diploid genomes) in eight different species of four different genera ranged almost fourfold, from 0.12 to 0.46 pg. A comparison with previously published v ...
DOI:
10.1007/s10750-010-0487-1

8. Analysing threshold effects in the sexual dynamics of cyclically parthenogenetic rotifer populations

Author:
Serra, M.; Smith, H. A.; Weitz, J. S.; Snell, T. W.
Source:
Hydrobiologia 2011 v.662 no.1 pp. 121-130
ISSN:
0018-8158
Subject:
Brachionus; females; models; parthenogenesis; population density; progeny
Abstract:
... Sex in some cyclically parthenogenetic rotifers is triggered when a threshold population density is achieved. In Brachionus, accumulation of a mixis-inducing protein (MIP) that the rotifers excrete into the medium is the proximal signal. Models explicitly accounting for MIP dynamics suggest that either (1) a positive feedback of MIP concentration on MIP production or (2) a switching relationship b ...
DOI:
10.1007/s10750-010-0517-z

9. Comparative analysis of rotifer community structure in five subtropical shallow lakes in East China: role of physical and chemical conditions

Author:
Xin-Li Wen; Yi-Long Xi; Fang-Ping Qian; Gen Zhang; Xian-Ling Xiang
Source:
Hydrobiologia 2011 v.661 no.1 pp. 303-316
ISSN:
0018-8158
Subject:
Brachionus; biogeography; community structure; lakes; pollution load; species diversity; water temperature; China
Abstract:
... Worldwide, there have been few comparative studies on rotifer communities in subtropical lakes. We studied changes in rotifer community structure over 1 year and its relationship to several physicochemical variables in five subtropical shallow lakes in East China, covering a nutrient gradient from mesotrophy to moderate eutrophy. In these lakes, the genera Brachionus, Lecane, and Trichocerca domin ...
DOI:
10.1007/s10750-010-0539-6

10. Sequence analysis of genomic DNA (680 Mb) by GS-FLX-Titanium sequencer in the monogonont rotifer, Brachionus ibericus

Author:
Lee, Jae-Seong; Kim, Ryeo-Ok; Rhee, Jae-Sung; Han, Jeonghoon; Hwang, Dae-Sik; Choi, Beom-Soon; Lee, Chang Joo; Yoon, Yong-Dal; Lim, Jong-Sung; Lee, Young-Mi; Park, Gyung Soo; Hagiwara, Atsushi; Choi, Ik-Young
Source:
Hydrobiologia 2011 v.662 no.1 pp. 65-75
ISSN:
0018-8158
Subject:
B-DNA; Brachionus; antioxidants; endocrinology; evolution; metabolism; metagenomics; oogenesis; sequence analysis
Abstract:
... The monogonont rotifer, Brachionus ibericus (S type), is considered to be a promising model species for developmental biology, evolution, and environmental genomics. In an attempt to accelerate the molecular understanding of B. ibericus, we sequenced 680.5 Mb of genomic DNA using the genome sequencer GS-FLX-Titanium. We obtained 2,062,621 reads (average read length 329.9 bp) and 145,418 contigs (t ...
DOI:
10.1007/s10750-010-0516-0

11. Validating the systematic position of Plationus Segers, Murugan & Dumont, 1993 (Rotifera: Brachionidae) using sequences of the large subunit of the nuclear ribosomal DNA and of cytochrome C oxidase

Author:
Reyna-Fabián, Miriam E.; Laclette, Juan Pedro; Cummings, Michael P.; García-Varela, Martín
Source:
Hydrobiologia 2010 v.644 no.1 pp. 361-370
ISSN:
0018-8158
Subject:
Brachionus; cytochrome-c oxidase; furrows; genes; new genus; nuclear genome; nucleotide sequences; ribosomal RNA; scanning electron microscopes; trees; zooplankton
Abstract:
... Members of the family Brachionidae are free-living organisms that range in size from 170 to 250 microns. They comprise part of the zooplankton in freshwater and marine systems worldwide. Morphologically, members of the family are characterized by a single piece loricated body without furrows, grooves, sulci or dorsal head shields, and a malleate trophi. Differences in these structures have been tr ...
DOI:
10.1007/s10750-010-0203-1

12. Seasonal dynamics of zooplankton in a shallow eutrophic, man-made hyposaline lake in Delhi (India): role of environmental factors

Author:
Arora, Jyoti; Mehra, N. K.
Source:
Hydrobiologia 2009 v.626 no.1 pp. 27-40
ISSN:
0018-8158
Subject:
nutrient content; cations; watersheds; seasonal variation; Microcystis aeruginosa; groundwater; biochemical oxygen demand; zooplankton; interspecific variation; lakes; Mesocyclops; multivariate analysis; surface water; water quality; community structure; species diversity; chemical oxygen demand; Brachionus; silicates; physicochemical properties; environmental factors; rain; nitrates; India
Abstract:
... Old Fort Lake, a small (1.6 ha), shallow, and recreational water body in Delhi (India) was studied through monthly surveys in two consecutive years (January, 2000-December, 2001). Precipitation is the major source of water for this closed basin lake. In addition, ground water is used for replenishing the lake regularly. This alkaline, hyposaline hard water lake contains very high ionic concentrati ...
DOI:
10.1007/s10750-009-9735-7

13. Global diversity of rotifers (Rotifera) in freshwater

Author:
Hendrik Segers
Source:
Hydrobiologia 2008 v.595 no.1 pp. 49-59
ISSN:
0018-8158
Subject:
Bdelloidea; Brachionus; animals; ecology; fossils; freshwater; indigenous species; inland waters; littoral zone; parthenogenesis; phylogeny; surface water; tropics; Africa; Antarctica; Australia; Europe; India; Lake Baikal; Madagascar; North America; South America; South East Asia
Abstract:
... Rotifera is a Phylum of primary freshwater Metazoa containing two major groups: the heterogonic Monogononta and the exclusively parthenogenetic Bdelloidea. Monogononta contains 1,570 species-level taxa, of which a majority (1,488) are free-living fresh or inland water taxa. Bdelloidea contains 461 “species,” only one of which is marine, but with many limnoterrestrial representatives or animals of ...
DOI:
10.1007/s10750-007-9003-7

14. Combined effects of sediment and lead (PbCl₂) on the demography of Brachionus patulus (Rotifera: Brachionidae)

Author:
García-García, G.; Picazo-Paez, E. A.; Nandini, S.; Sarma, S. S. S.
Source:
Hydrobiologia 2007 v.593 no.1 pp. 209-218
ISSN:
0018-8158
Subject:
Brachionus patulus; Chlorella vulgaris; adverse effects; confidence interval; demography; eggs; fecundity; heavy metals; lead; lethal concentration 50; life tables; longevity; population density; population growth; progeny; reproductive performance; sediments; survival rate; turbidity
Abstract:
... We studied the response of Brachionus patulus to different concentrations of the heavy metal Pb in the presence and absence of sediments. We conducted acute (LC₅₀) and chronic (life table demography and population growth) toxicity tests using sediment levels of 0, 30 and 280 mg l-¹ (=0, 17 and 170 NTU) and Pb at 0, 0.06 and 0.6 mg l-¹. Experiments were conducted at 20 ± 1°C on a horizontal shaker ...
DOI:
10.1007/s10750-007-9039-8

15. Inducible defenses and rotifer food chain dynamics

Author:
Van der Stap, Irene; Vos, Matthijs; Mooij, Wolf M.
Source:
Hydrobiologia 2007 v.593 no.1 pp. 103-110
ISSN:
0018-8158
Subject:
Brachionus calyciflorus; Scenedesmaceae; carnivores; extinction; food chain; grazing; herbivores; laboratory experimentation; models; population dynamics; predation
Abstract:
... Theoretical studies have predicted that inducible defenses affect food chain dynamics and persistence. Here we review and evaluate laboratory experiments that tested hypotheses developed from these theoretical studies. This review specifically focuses on the effects of inducible defenses in phytoplankton-rotifer food chain dynamics. First, we describe the occurrence of colony formation within diff ...
DOI:
10.1007/s10750-007-9051-z

16. Intraclonal variation in propensity for mixis in several rotifers: variation among females and with maternal age

Author:
Gilbert, John J.; Schröder, Thomas
Source:
Hydrobiologia 2007 v.593 no.1 pp. 121-128
ISSN:
0018-8158
Subject:
Brachionus; analysis of variance; clones; daughters; diapause; eggs; females; parthenogenesis; population growth; Argentina; Australia; Florida; Georgia; Germany; Spain; Texas
Abstract:
... In 14 previously published experiments with clones of three species of Brachionus, Epiphanes ukera, and Rhinoglena frontalis, females cultured singly in small volumes from birth through most of their reproductive period usually produced some mictic daughters. Here, these data are analyzed to test two hypotheses: the propensity of females in a clone to produce mictic daughters will vary significant ...
DOI:
10.1007/s10750-007-9040-2