397 results match your criteria rotifers food

Larval Performance of Amphidromous and Landlocked Atyid Shrimp Species in the Genus under Different Feeding Conditions.

Zool Stud 2020 15;59:e70. Epub 2020 Dec 15.

Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan, Minato, Tokyo 108-8477, Japan. E-mail: (Hamasaki); (Okada); (Nishimoto); (Dan).

Freshwater shrimps in the family Atyidae exhibit two life history traits: 1) amphidromy, with many small embryos hatching into planktotrophic larvae that develop in the sea, and 2) landlocked, with few large embryos hatching into non-feeding lecithotrophic larvae, or facultative lecithotrophic larvae that develop in freshwater. The lecithotrophy of larvae is considered an adaptation to limited food conditions in the freshwater environment. Furthermore, faster development and settlement behaviours that large larvae exhibit are considered adaptations that allow the larvae to stay in or near parental habitats in fast-flowing streams. Read More

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December 2020

DNA metabarcoding reveals trophic niche diversity of micro and mesozooplankton species.

Proc Biol Sci 2021 Jun 16;288(1953):20210908. Epub 2021 Jun 16.

Department of Ecology, Environment, and Plant Science, Stockholm University, Svante Arrhenius Väg 20A, 106 91 Stockholm, Sweden.

Alternative pathways of energy transfer guarantee the functionality and productivity in marine food webs that experience strong seasonality. Nevertheless, the complexity of zooplankton interactions is rarely considered in trophic studies because of the lack of detailed information about feeding interactions in nature. In this study, we used DNA metabarcoding to highlight the diversity of trophic niches in a wide range of micro- and mesozooplankton, including ciliates, rotifers, cladocerans, copepods and their prey, by sequencing and genes. Read More

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Seasonal analysis of food items and feeding habits of endangered riverine catfish Rita rita (Hamilton, 1822).

Braz J Biol 2021 4;82:e237040. Epub 2021 Jun 4.

King Saud University, College of Science, Department of Zoology, Riyadh, Saudi Arabia.

This investigation presents the food and feeding activity of and endangered riverine catfish Rita rita, during February 2017-January 2018. A total of 225 fish individuals was analyzed for stomach contents by characterizing the dominant food items and morphometric features. The results divulged ten major food items consumed, preferably fish scales and eggs, teleost fishes, copepods, cladocerans, rotifers, and mollusks. Read More

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Is the toxicity of nanosized polymethylmethacrylate particles dependent on the exposure route and food items?

J Hazard Mater 2021 07 16;413:125443. Epub 2021 Feb 16.

Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal. Electronic address:

The environmental effects of nanoplastics-NPLs have been addressed mainly through short-term exposures to a few types of polymers, neglecting other NPLs that are economically relevant like polymethylmethacrylate - PMMA. This work aimed to assess long-term effects of PMMA-NPLs on the marine primary consumer Brachionus plicatilis, evaluating the influence of different exposure routes (waterborne, foodborne and both) and food items (Nannochloropsis gaditana and Tetraselmis chuii). Rotifers were 21 days exposed to: a) control, with clean medium and food-CTR; b) contaminated medium (8. Read More

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eDNA as a tool for non-invasive monitoring of the fauna of a turbid, well-mixed system, the Elbe estuary in Germany.

PLoS One 2021 16;16(4):e0250452. Epub 2021 Apr 16.

Center of Natural History, Universität Hamburg, Hamburg, Germany.

The Elbe is one of the longest European rivers and features a large, turbid and well-mixed estuary, which runs through the inner city of Hamburg. The Elbe has been closely monitored using classical catch techniques in the past. Here we tested a COI-based eDNA approach for assessing the biodiversity within the Elbe. Read More

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A new set of highly efficient primers for COI amplification in rotifers.

Mitochondrial DNA B Resour 2021 Feb 19;6(2):636-640. Epub 2021 Feb 19.

Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou, China.

Rotifers are a small-sized but key group of freshwater zooplankters with high species richness, linking primary producers to higher consumers in aquatic food webs. DNA barcoding has been widely used in exploring its biodiversity, cryptic speciation and phylogeny. However, the inefficiency of universal primers to amplify COI of rotifers hinders our understanding of their species richness and genetic diversity. Read More

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February 2021

Application of heavy-ion-beam irradiation to breeding large rotifer.

Biosci Biotechnol Biochem 2021 Feb;85(3):703-713

Nishina Center for Accelerator-Based Science, RIKEN, Wako, Japan.

In larviculture facilities, rotifers are generally used as an initial food source, while a proper size of live feeds to connect rotifer and Artemia associated with fish larval growth is needed. The improper management of feed size and density induces mass mortality and abnormal development of fish larvae. To improve the survival and growth of target larvae, this study applied carbon and argon heavy-ion-beam irradiation in mutation breeding to select rotifer mutants with larger lorica sizes. Read More

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February 2021

Evaluation of the environmental impact of magnetic nanostructured materials at different trophic levels.

Nanotoxicology 2021 03 27;15(2):257-275. Epub 2021 Jan 27.

Departamento de Química, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico.

Safety on the use of magnetic nanomaterials (MNMs) has become an active topic of research given all the recent applications of these materials in various fields. It is known that the toxicity of MNMs depends on size, shape, and surface functionalization. In this study, we evaluate the biocompatibility with different aquatic organisms of engineered MNMs-CIT with excellent aqueous dispersion and long-term colloidal stability. Read More

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Freshwater zooplankton microbiome composition is highly flexible and strongly influenced by the environment.

Mol Ecol 2021 03 25;30(6):1545-1558. Epub 2021 Feb 25.

MEG- Molecular Ecology Group, Water Research Institute, National Research Council of Italy (CNR-IRSA), Verbania, Italy.

The association with microbes in plants and animals is known to be beneficial for host's survival and fitness, but the generality of the effect of the microbiome is still debated. For some animals, similarities in microbiome composition reflect taxonomic relatedness of the hosts, a pattern termed phylosymbiosis. The mechanisms behind the pattern could be due to co-evolution and/or to correlated ecological constraints. Read More

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Feeding behavior toxicity in the marine rotifer Brachionus plicatilis caused by 2,2',4,4'-tetrabromodiphenyl ether (BDE-47): Characteristics and mechanisms.

Chemosphere 2021 May 4;271:129512. Epub 2021 Jan 4.

Department of Marine Ecology, College of Marine Life Science, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266237, China. Electronic address:

Polybrominated diphenyl ether contamination in marine environments has received special attention due to its accumulation and magnification in the marine food web and toxicity to organisms. In the present study, a series of short-term toxicological tests were conducted with the marine rotifer Brachionus plicatilis to assess the effects on ingestion and digestive performance after treatment with 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) at nonlethal concentrations under controlled laboratory conditions and to analyze the possible mechanism. The results showed that with accumulation in rotifers, BDE-47 caused a significant decline in the filtration and feeding rates in a concentration-dependent manner. Read More

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Effects of bromate on life history parameters, swimming speed and antioxidant biomarkers in Brachionus calyciflorus.

Ecotoxicol Environ Saf 2021 Jan 7;208:111705. Epub 2020 Dec 7.

School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China.

The baking industries and disinfection of tap water released a considerable amount of bromate into surface water, which has been reported as a carcinogenic compound to mammals. Rotifers play an important role in freshwater ecosystems and are model organisms to assess environmental contamination. In the present study, the effects of different concentrations (0. Read More

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January 2021

Enhancement of Live Food Nutritional Status with Essential Nutrients for Improving Aquatic Animal Health: A Review.

Animals (Basel) 2020 Dec 21;10(12). Epub 2020 Dec 21.

Laboratory of Sustainable Aquaculture, International Institute of Aquaculture and Aquatic Sciences, Port Dickson 71050, Negeri Sembilan, Malaysia.

At the present time, no artificial larval diet is capable of entirely fulfilling the dietary requirements of several larval fish and crustacean species. Zooplankton live food is the basic foundation of fish larviculture, and successful rearing of fish larvae still heavily depends on an adequate supply of nutritious live food. Despite being important, the production protocols of copepods and cladocerans () are still underdeveloped in hatcheries. Read More

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December 2020

The Effect of Orally Supplemented Melatonin on Larval Performance and Skeletal Deformities in Farmed Gilthead Seabream ().

Int J Mol Sci 2020 Dec 16;21(24). Epub 2020 Dec 16.

Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, University of Messina, 98168 Messina, Italy.

The gilthead seabream larval rearing in continuous light is common in most Mediterranean hatcheries to stimulate larval length growth and increase food consumption. Several studies have shown that continuous light affects larval development and increases the prevalence of skeletal deformities. Melatonin is a crucial pineal neurohormone that displays daily secretion patterns, stimulates cell proliferation and embryonic development in Atlantic salmon and zebrafish, and improves osseointegration in mice and humans. Read More

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December 2020

Prospective enzymes for omega-3 PUFA biosynthesis found in endoparasitic classes within the phylum Platyhelminthes.

J Helminthol 2020 Dec 10;94:e212. Epub 2020 Dec 10.

Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.

The free-living infectious stages of macroparasites, specifically, the cercariae of trematodes (flatworms), are likely to be significant (albeit underappreciated) vectors of nutritionally important polyunsaturated fatty acids (PUFA) to consumers within aquatic food webs, and other macroparasites could serve similar roles. In the context of de novo omega-3 (n-3) PUFA biosynthesis, it was thought that most animals lack the fatty acid (FA) desaturase enzymes that convert stearic acid (18:0) into ɑ-linolenic acid (ALA; 18:3n-3), the main FA precursor for n-3 long-chain PUFA. Recently, novel sequences of these enzymes were recovered from 80 species from six invertebrate phyla, with experimental confirmation of gene function in five phyla. Read More

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December 2020

Microalgal solutions in the cultivation of rotifers and artemia: scope for the modulation of the fatty acid profile.

Heliyon 2020 Nov 3;6(11):e05415. Epub 2020 Nov 3.

Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, IP), Rua Alfredo Magalhães Ramalho, 6, 1495-006 Lisbon, Portugal.

The microalgae sp. (AUR), sp. (ISO), and sp (NAN) were studied as possible alternative feeds to well established commercial compound feeds for both rotifers () and . Read More

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November 2020

Functional shifts in estuarine zooplankton in response to climate variability.

Ecol Evol 2020 Oct 29;10(20):11591-11606. Epub 2020 Sep 29.

Novia University of Applied Sciences Ekenäs Finland.

Functional traits are becoming more common in the analysis of marine zooplankton community dynamics associated with environmental change. We used zooplankton groups with common functional properties to assess long-term trends in the zooplankton caused by certain environmental conditions in a highly eutrophicated gulf.Time series of zooplankton traits have been collected since the 1960s in the Gulf of Riga, Baltic Sea, and were analyzed using a combination of multivariate methods (principal coordinate analysis) and generalized additive models. Read More

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October 2020

Algal density affects the influences of polyethylene microplastics on the freshwater rotifer Brachionus calyciflorus.

Chemosphere 2021 May 13;270:128613. Epub 2020 Oct 13.

College of Life Sciences, Anhui Normal University, Wuhu, 241000, China.

Most previous researches focused on the toxicity of polystyrene microplastics (MPs) to marine organisms, but less on polyethylene MPs and freshwater zooplanktons. The present study aims to elucidate the toxicity of polyethylene (PE) MPs (diameter = 10-22 μm) to the typical freshwater rotifer Brachionus calyciflorus. Firstly, fluorescent microscope observation showed that rotifers could ingest PE MPs and accumulate them in their digestive tracts. Read More

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Naturally Occurring Microbiota in Dengue Vector Mosquito Breeding Habitats and Their Use as Diet Organisms by Developing Larvae in the Kandy District, Sri Lanka.

Biomed Res Int 2020 12;2020:5830604. Epub 2020 Oct 12.

Department of Zoology and Environmental Management, Faculty of Science, University of Kelaniya, Dalugama, Kelaniya, Sri Lanka GQ 11600.

Naturally occurring microbiota in mosquito larval habitats are among biotic factors which affect the population dynamics of developing larvae. Many microbiota species serve as food items for vector mosquito larvae, and food limitations within habitats adversely affect larval survival, developmental rate, adult fitness, and thereby vector competence. Therefore, identification of microbiota as associates with larvae reveals their relationship between each other as parasites, pathogens, epibionts, or diet organisms. Read More

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Alpine Snow Algae Microbiome Diversity in the Coast Range of British Columbia.

Front Microbiol 2020 28;11:1721. Epub 2020 Jul 28.

Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada.

Snow algae blooms contain bacteria, fungi, and other microscopic organisms. We surveyed 55 alpine snow algae blooms, collecting a total of 68 samples, from 12 mountains in the Coast Range of British Columbia, Canada. We used microscopy and rDNA metabarcoding to document biodiversity and query species and taxonomic associations. Read More

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Functional groups of rotifers and an exotic species in a tropical shallow lake.

Sci Rep 2020 09 7;10(1):14698. Epub 2020 Sep 7.

Instituto Estadual de Florestas, Praça Tubal Vilela 03, Centro, Uberlândia, MG, 38400-186, Brazil.

In freshwater environments the rotifer group may be divided into microphagous and raptorial species regarding their feeding patterns, and such guilds differently interact with other community components. Here, we analyzed the influence of cladocerans, cyclopoid nauplii, temperature, food resources and an exotic species on rotifer guilds, based on weekly samplings for 1 year. We have identified rotifer species and their trophi types in order to separate them into the raptorial and microphagous functional groups. Read More

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September 2020

Zooplankton communities and their relationship with water quality in eight reservoirs from the midwestern and southeastern regions of Brazil.

Braz J Biol 2021 Jul-Sep;81(3):701-713

Universidade Estadual do Oeste do Paraná - UNIOESTE, Programa de Pós-graduação em Recursos Pesqueiros e Engenharia de Pesca, Toledo, PR, Brasil.

Zooplankton are widely recognised as being regulated primarily by predators and food availability. In reservoirs, the quantity and quality of food resources are generally affected by the characteristics of the water, which in turn are controlled by the flow pulse generated by operation of the dams. In this study, we investigated the relationship between zooplankton, water quality and food availability (phytoplankton) in eight hydroelectric reservoirs located in Brazil. Read More

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February 2021

Preface: Patterns and processes of meiofauna in freshwater ecosystems.

Hydrobiologia 2020 May 26:1-9. Epub 2020 May 26.

Department of Animal Ecology, Bielefeld University, Bielefeld, Germany.

Never heard of harpacticoids, ostracods, gastrotrichs or microturbellarians? This is no surprise, they are so tiny! Yet these taxa and many others more famous (nematodes, rotifers, or tardigrades) show complex behaviours and extraordinary physiologies that allow them to colonize inland waters worldwide. This exuberant fauna is better known as the meiofauna (or meiobenthos). Meiofaunal organisms have been fascinating study objects for zoologists since the seventeenth century and recent research has demonstrated their intermediate role in benthic food webs. Read More

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Ingestion of microplastics by meiobenthic communities in small-scale microcosm experiments.

Sci Total Environ 2020 Dec 28;746:141276. Epub 2020 Jul 28.

Bielefeld University, Animal Ecology, Konsequenz 45, 33615 Bielefeld, Germany.

Microplastics have been detected in many different environments. Nematodes are a rife meiofaunal taxon and occupy an important trophic position in benthic food webs. Laboratory-based ingestion experiments have demonstrated the susceptibility of single nematode species to microplastic uptake. Read More

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December 2020

The potential of fatty acid isotopes to trace trophic transfer in aquatic food-webs.

Philos Trans R Soc Lond B Biol Sci 2020 08 15;375(1804):20190652. Epub 2020 Jun 15.

Department of Ecology, Environment and Plant Sciences, Stockholm University, 10691 Stockholm, Sweden.

Compound-specific isotope analyses (CSIA) of fatty acids (FA) constitute a promising tool for tracing energy flows in food-webs. However, past applications of FA-specific carbon isotope analyses have been restricted to a relatively coarse food-source separation and mainly quantified dietary contributions from different habitats. Our aim was to evaluate the potential of FA-CSIA to provide high-resolution data on within-system energy flows using algae and zooplankton as model organisms. Read More

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Inter- and intraspecific differences in rotifer fatty acid composition during acclimation to low-quality food.

Philos Trans R Soc Lond B Biol Sci 2020 08 15;375(1804):20190644. Epub 2020 Jun 15.

Animal Ecology Group, Zoological Institute and Museum, University of Greifswald, Loitzer Strasse 26, D-17489 Greifswald, Germany.

Biochemical food quality constraints affect the performance of consumers and mediate trait variation among and within consumer species. To assess inter- and intraspecific differences in fatty acid retention and conversion in freshwater rotifers, we provided four strains of two closely related rotifer species, stricto and , with food algae differing in their fatty acid composition. The rotifers grazed for 5 days on either or , two food algae with distinct polyunsaturated fatty acid (PUFA) profiles, before the diets were switched to PUFA-free , which was provided for three more days. Read More

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A rapid, simple screening toxicity test using desiccated bdelloid rotifers: Rotifer Activity Inhibition Test (RAIT).

Environ Sci Pollut Res Int 2021 Jan 27;28(4):3810-3819. Epub 2020 May 27.

Laboratory for Environmental Toxicology and Aquatic Ecology, Ghent University, Ghent, Belgium.

A protocol for an ultra-rapid screening toxicity test is described using the rotifer Philodina acuticornis/roseola. The test can be executed in 30 min starting from the rehydration of desiccated life stages called tuns. Philodina tuns remain viable for years when maintained dry and at low temperature. Read More

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January 2021

A long-term study on zooplankton in two contrasting cascade reservoirs (Iguaçu River, Brazil): effects of inter-annual, seasonal, and environmental factors.

PeerJ 2020 5;8:e8979. Epub 2020 May 5.

Programa de Pós-Graduação em Recursos Pesqueiros e Engenharia de Pesca, Universidade Estadual do Oeste do Paraná, Toledo, Paraná, Brazil.

Background: In reservoirs, zooplankton strongly interact with the physical and chemical characteristics of water, and this interaction is mainly influenced by climate variation and the different methods used to manage the dam water level. Therefore, the aim of this study was to evaluate how the distinct operating modes of two cascade reservoirs affected the richness, abundance, and composition of zooplankton, both spatially (intra and inter-reservoirs) and temporally (annual and seasonal). In this study, the upstream reservoir (Salto Santiago) operates using the storage method, with a water retention time (WRT) of 51 days, whereas the downstream reservoir (Salto Osório) operates using the run-of-river method, with a WRT of 16 days. Read More

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A small omnivorous bitterling fish (Acheilognathus macropterus) facilitates dominance of cyanobacteria, rotifers and Limnodrilus in an outdoor mesocosm experiment.

Environ Sci Pollut Res Int 2020 Jul 16;27(19):23862-23870. Epub 2020 Apr 16.

Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing, 100190, China.

Small omnivorous fish often dominate in subtropical shallow lakes, and they may affect the community structure of aquatic organisms on at least two trophic levels. However, in the study of aquatic food webs in subtropical lakes, most ecologists have focused on the effects of large-sized omnivorous species (e.g. Read More

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Intraspecific variation in sensitivity to food availability and temperature-induced phenotypic plasticity in the rotifer .

J Exp Biol 2020 04 1;223(Pt 7). Epub 2020 Apr 1.

Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain.

Organisms with wide environmentally induced morphological plasticity and cosmopolitan distribution, e.g. the common freshwater rotifer , are ideal models to study the evolution of plastic polymorphisms and the capacity of zooplankton to adapt to local selection conditions. Read More

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The influence of diet on the microbiota of live-feed rotifers (Brachionus plicatilis) used in commercial fish larviculture.

FEMS Microbiol Lett 2020 01;367(2)

Department of Aquaculture and Fish Diseases, Faculty of Aquatic Sciences, Istanbul University, Ordu Cad. No:8, 34134 Istanbul, Turkey.

Live-feed is indispensable to commercial fish larviculture. However, high bacterial loads in rotifers could pose a biosecurity risk. While this may be true, live-feed associated bacteria could also be beneficial to fish larvae through improved feed utilization or pathogen inhibition following host microbiota modification. Read More

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January 2020