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Registros recuperados: 22
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Advances in the enrichment of rotifers and <i>Artemia</i> as food sources in marine larviculture OMA
Léger, P.; Grymonpré, D.; Van Ballaer, E.; Sorgeloos, P..
A summary is given of experiments conducted regarding the enrichment of rotifers and <i>Artemia</i> for use as food sources marine larviculture, with particular reference to levels of omega 3-HUFA.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brine shrimp culture; Crustacean culture; Fatty acids; Food organisms; Nutritive value; Artemia; Rotifera.
Ano: 1989 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2880
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An assessment of the factors determining rotifer assemblage in river-lake systems: the effects of seasonality and habitat Rev. Bras. Zool.
Serafim-Júnior,Moacyr; Perbiche-Neves,Gilmar; Lansac-Tôha,Fabio A..
ABSTRACT Zooplankton exhibit several trends of variation in space and time, and these trends can be more evident in natural environments without anthropic perturbations. Examples of anthropic factors are climate change, eutrophication and construction of reservoirs. This study evaluated the influence of three factors - seasonality, type of environment and the presence of aquatic macrophytes - on various ecological attributes of rotifers in a river-lake system located in the Paraná River floodplain. Monthly samplings were conducted during 1993 and 1994. The mean species richness per sample was 60 species. The seasonality and the type of environment influenced the ecological attributes of rotifer assemblages, while the presence or absence of aquatic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecology; Limnology; Rotifera; Upper Paraná River floodplain.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100305
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Bacteries associees aux production de Brachionus plicatilis ArchiMer
Nicolas, Jean-louis; Joubert, M.
Bacteria associated with semi-continuous culture of Brachionus plicatilis , which is used as the first food of marine fish larvae, were counted on Zobell 2216 E medium and identified. The numbers of bacteria were very high in both Brachionus (about 10 super(11) bact. per ml of digestive content) and in water (from 1.6.10 super(6) to 4.7.10 super(7) bact. per ml). The cultures were studied at driving a time when mortalities occurred frequently. The introduction of a Pseudomonas) phenon at a proportion of about 50% to the dominant microflora persisted in time and was little influenced by diet. It has been the cause of the repression of the Vibrio, Aeromonas group which was found in an unusually small proportion. It induced a lack of microflora diversity and...
Tipo: Text Palavras-chave: Brachionus plicatilis; Rotifera; Pseudomonas; Aeromonas; Vibrio; Nutrition; Pathology; Fish culture; Fish larvae; Food organisms; Bacteria; Continuous culture; Ecological associations; Zooplankton culture.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-994.pdf
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Enrichment of live foods. ArchiMer
Watanabe, T.
Live foods such rotifers and Artemia are still indispensable for mass propagation of larval fish. At present, more than 20 fish and crustacean species are mass produced in Japanese governmental fish farming centres and private hatcheries. Fry are either released into the coastal areas or used for commercial cultivation. This culture technology is rapidly developing with new species being introduced each year and larval rearing is increasingly identified as the number one constraint. Artemia is used most extensively, particularly for the mass production of Kuruma prawn, Penaeus japonicus .
Tipo: Text Palavras-chave: Penaeus japonicus; Malacostraca; Rotifera; Diets; Larvae; Brine shrimp culture; Nutrition; Marine crustaceans; Shrimp culture; Hatcheries; Fish culture.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1444.pdf
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High-density production of the rotifer <i>Brachionus plicatilis</i> in a recirculation system: consideration of water quality, zootechnical and nutritional aspects OMA
Suantika, G.; Dhert, Ph.; Nurhudah, M.; Sorgeloos, P..
Rotifers were reared on the artificial diet culture Selco® in batch and recirculation conditions at different water exchange rates. The different rearing conditions resulted in considerable changes in water quality, which in their turn affected rotifer growth and food consumption. At a daily water exchange rate of 100%, no positive effect was obtained in rotifer growth compared to the batch rearing system, but the rotifer culture period could be prolonged by 1 week. By increasing the daily water exchange rate from 100 to 300% the maximum rotifer density could be significantly (<i>P</i> < 0.05) increased from 1800 to 2500 individuals ml<sup>-1</sup>. At the highest recirculation rate (daily water exchange of 500%) the highest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture systems; Batch culture; Population density; Recirculating systems; Water quality; Zooplankton culture; Brachionus plicatilis; Rotifera.
Ano: 2000 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=44
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O estado da arte da biodiversidade de rotíferos planctônicos de ecossistemas límnicos de Pernambuco Biota Neotropica
Melo Júnior,Mauro de; Almeida,Viviane Lúcia dos Santos; Neumann-Leitão,Sigrid; Paranaguá,Maryse Nogueira; Moura,Ariadne do Nascimento.
Este trabalho apresenta uma avaliação do estado da arte da biodiversidade de rotíferos planctônicos de alguns ecossistemas aquáticos continentais para Pernambuco (Brasil). Um levantamento bibliográfico foi realizado e a maior parte das pesquisas enfocou aspectos sazonais e estado trófico dos ecossistemas. Pelo menos 19 locais foram estudados no tocante aos rotíferos. O Sertão é a região mais estudada. Nesta pesquisa foram registradas 64 espécies de rotíferos planctônicos, distribuídas em 18 famílias e 29 gêneros. As espécies mais freqüentes nos locais estudados foram Keratella tropica e Brachionus falcatus, mostrando que a maior parte dos estudos foi realizada na zona limnética. Os resultados sugerem ainda a necessidade de mais pesquisas sobre a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rotifera; Lista de espécies; Ecossistemas límnicos; Pernambuco; Nordeste do Brasil.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000300013
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Olpidium gregarium, a chytrid fungus affecting rotifers populations in Rio Grande Reservoir, São Paulo State, Brazil Biota Neotropica
Meirinho,Patrícia do Amaral; Nishimura,Paula Yuri; Pires-Zottarelli,Carmen Lidia Amorim; Mochini-Carlos,Viviane; Pompêo,Marcelo Luiz Martins.
A chytrid fungus Olpidium gregarium was found in Rio Grande Reservoir as rotifers populations' parasite. Along the reservoir central axis, the rotifers density decreased in the dam direction, while the density of affected rotifers by the chytrid fungus increased in the same direction. Moreover, some rotifers species were more affected than others, thus showing certain preference for some rotifers species. Thereby, this parasite may be interfering in the distribution of rotifers population in Rio Grande Reservoir. This is the first report of this species for Brazil.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Parasite; Chytridiomycota; Rotifera; Zones.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100036
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Production, disinfection and evaluation for aquaculture applications of rotifer resting eggs from Bohai Bay, P.R. of China OMA
Dhert, P.; Schoeters, K.; Vermeulen, P.; Sun, J.; Gao, S.; Shang, Z.; Naihong, X.; Van Duffel, H.; Sorgeloos, P..
The dynamics of resting egg production of the rotifer <i>Brachionus plicatilis</i> originating from a wild population in the Tanggu Saltworks (P.R. China) was investigated. In the natural environment as well as in semi-controlled rearing conditions an increased resting egg production was noticed with declining food availability. Processed resting eggs had a hatching efficiency of 3x10<sup>6</sup> rotifers per gramme irrespective of their origin. Hatching started 22h after the initiation of incubation and was completed after 36h. Rotifers obtained from resting eggs could be further cultured on Culture Selco® and enriched with Super Selco®. The fatty acid profile of these rotifers were not divergent from reference rotifers...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture; Resting eggs; Rotifera.
Ano: 1997 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2939
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Quantifying zooplankton species: use of richness estimators Iheringia, Sér. Zool.
Castilho,Maria Carolina de A.; Wisniewski,Maria José dos S.; Wisniewski,Célio; Silva,Érika dos S..
ABSTRACT Richness estimators (Jackknife 1, Bootstrap, Chao 1 and ACE) were used to relate zooplankton species richness with amount of water collected per sample and number of samples throughout the year for the limnetic region of Sapucai River compartment of Furnas reservoir, state of Minas Gerais, Brazil. Seven 100 L samples were collected in sequence using a motor pump, and seven 70 L samples were collected in sequence using a plankton net (68 μm mesh size) in vertical hauls, to totalize 450 L, in three stations of the reservoir. Twelve monthly samplings were carried out over a year. The assessment of richness was made by analyzing the asymptotic behavior of the estimator curves. The samplings reached the asymptote from 350 L of collection with trawls...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Cladocera; Rotifera; Sampling effort; Aquatic environments.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100211
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Review and current status of the aquaculture potential for the mahimahi, Coryphaena hippurus ArchiMer
Kraul, S.
The mahimahi, Coryphaena hippurus , has excellent potential for aquaculture due to its fast growth (2 kg at 6 months, 9 kg at 1 year), good food conversion efficiency (30%, wet weight), high fecundity with natural captive spawns (200,000 eggs/female/2 days year round for a 1 year old female), and high price (US$ 9.00/kg wholesale in Hawaii).
Tipo: Text Palavras-chave: Copepoda; Rotifera; Coryphaena hippurus; Coryphaenidae; Pisces; Artificial feeding; Diets; Spawning; Fingerlings; Females; Eggs; Food; Food conversion; Hatcheries; Nutritional requirements; Growth.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1473.pdf
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Rotifera das zonas limnética e litorânea do reservatório de Tapacurá, Pernambuco, Brasil Iheringia, Sér. Zool.
Almeida,Viviane L. dos S.; Larrazábal,Maria Eduarda L. de; Moura,Ariadne do N.; Melo Júnior,Mauro de.
Os rotíferos do reservatório de Tapacurá, Pernambuco, Brasil foram estudados quanto à distribuição horizontal nas zonas limnética e litorânea, nos períodos chuvoso (agosto de 2003) e seco (janeiro de 2004). Amostras quali-quantitativas foram obtidas através de coletas em ritmo nictimeral nas distintas zonas do reservatório, com intervalo de seis horas, em duas profundidades. Os parâmetros bióticos riqueza, densidade, diversidade e equitabilidade foram avaliados. Análises de similaridade e variância (ANOVA) também foram utilizadas. Vinte e oito espécies e duas subespécies de Rotifera foram encontradas, das quais cinco espécies são novas ocorrências para Pernambuco. A zona litorânea apresentou maior riqueza que a limnética em ambos ao período sazonais, com...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Limnologia biótica; Distribuição horizontal; Rotifera; Biodiversidade; Macrófitas.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000400009
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Selection of bacteria enhancing the growth rate of axenically hatched rotifers (<i>Brachionus plicatilis</i>) OMA
Rombaut, G.; Dhert, P.; Vandenberghe, J.; Verschuere, L.; Sorgeloos, P.; Verstraete, W..
The effect of bacterial strains on the growth rate of rotifers, Brachionus plicatilis, was determined under monoxenic conditions. The first objective was to obtain sterile rotifer cultures starting from rotifer resting eggs using merthiolate or glutaraldehyde as disinfectant. Sterile rotifer cultures were obtained, without affecting the hatching ability of the resting eggs, when 0.05 µl/l glutaraldehyde was used. This disinfection procedure was used to examine the effect of 20 bacterial strains, isolated from well-performing live-feed production systems, on the population growth rate of rotifers cultured under monoxenic conditions. Five out of the 20 bacterial strains tested were able to improve significantly the asexual reproduction of rotifers. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture; Aquaculture techniques; Bacterial diseases; Disease transmission; Disinfection; Hatching; Zooplankton; Zooplankton culture; Brachionus plicatilis; Rotifera.
Ano: 1999 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4030
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Spatiotemporal dynamics of soil rotifers in a South-Bohemian beech forest. Repositório Alice
DEVETTER, M..
Abstract ? The objective of this work was to determine seasonal variation and vertical distribution of the soil rotifer assemblage in a climax beech forest in South Bohemia. During 2005, soil rotifer was investigated to the species level. Soil samples of 10 cm2 and 10 cm in depth were divided into five layers, which were processed separately. Thirty one rotifer species were identified during the investigation. Dominant species significantly changed throughout the seasons. The most abundant species were Encentrum arvicola and Wierzejskiella vagneri among the monogononts, and Adineta steineri, Ceratotrocha cornigera, Habrotrocha filum, Habrotrocha ligula, Macrotrachela plicata, Mniobia tentans, Mniobia incrassata and Mniobia granulosa among the bdelloids....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Bdelloidea; Monogonota; Seasonal dynamics; Vertical distribution; Rotifera.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/660995
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Spatiotemporal dynamics of soil rotifers in a South-Bohemian beech forest PAB
Devetter,Miloslav.
The objective of this work was to determine seasonal variation and vertical distribution of the soil rotifer assemblage in a climax beech forest in South Bohemia. During 2005, soil rotifer was investigated to the species level. Soil samples of 10 cm² and 10 cm in depth were divided into five layers, which were processed separately. Thirty one rotifer species were identified during the investigation. Dominant species significantly changed throughout the seasons. The most abundant species were Encentrum arvicola and Wierzejskiella vagneri among the monogononts, and Adineta steineri, Ceratotrocha cornigera, Habrotrocha filum, Habrotrocha ligula, Macrotrachela plicata, Mniobia tentans, Mniobia incrassata and Mniobia granulosa among the bdelloids. Mean Shannon...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bdelloidea; Monogonota; Rotifera; Seasonal dynamics; Vertical distribution.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800035
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Species composition and abundance of rotifers in different environments of the floodplain of the upper Paraná river, Brazil Zoologia
Garcia,Aparecida Paula Perez; Lansac-Tôha,Fábio Amodêo; Bonecker,Cláudia Costa.
The purpose of this study was to describe the composition and abundance of rotifers in different environments: one lotie (the Ivinheima River) and another lentic (the Patos Lake) located in the floodplain of the Upper Paraná River. The influence of limnological variables on the structure and dynamics of rotifers was also examined. Samples were taken monthly from March 1992 through February 1993, in the open water region of the lake and river and in the channel between them and, in the littoral region of the lake and river. Of the 96 species identified, the best represented families were: Brachionidae (20 species), Lecanidae (18 species), and Trichocercidae (15 species). 55 species were widely distributed, 13 were pantropical, 16 neotropical (8 endemic to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rotifera; Paraná River; Floodplain; Neotropics.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000200006
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Techniques de cultures axeniques d'organismes planctoniques: Un rotifere, Brachionus plicatilis et une algue, Platymonas (= Tetraselmis ) suecica. ArchiMer
The efficiency of different methods for the purification and maintenance of axenic cultures of a rotifer and an unicellular alga is tested. The use of antibiotics seems to be the most suitable method to realize bacteria-free cultures of plankton. No elements prove that the presence of bacteria is necessary for the development of the cultures. Bacteria-free cultures show a physiological evolution of the culture medium is enriched with some nutrients.
Tipo: Text Palavras-chave: Brachionus plicatilis; Rotifera; Algae; Bacteria; Antibiotics; Algal culture; Laboratory culture.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/publication-1823.pdf
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The effect of HUFA and vitamin C-enriched rotifers on larval growth and survival of grouper (<i>Epinephelus suillus</i>) OMA
Chavez, D.R.; Estenor, D.G.; Merchie, G.; Lavens, P..
Newly-hatched grouper larvae were reared for 24 days at a density of 15 larvae.l<sup>-1</sup> in 250-l capacity cylindro-conical tanks filled with 200l seawater. Starting day 2, the larvae were given: <i>Chlorella</i>-fed rotifers (Chl-R) rotifers fed Culture Selco (INVE Aquaculture NV, Belgium) (CS-R), and rotifers fed Culture Selco and consequently enriched for 24h with 20% vitamin C (CSC-R). The rotifer density in the larval tanks was maintained at 15 rotifers.ml<sup>-1</sup>. The rotifer diet was supplemented with egg yolk until day 5. Each treatment had five replicates. Preliminary results show no significant difference in the survival rate of grouper larvae given Chl-R (4.21±2.8%), CS-R (2.56±0.9%) and CSC-R...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fatty acids; Feeding experiments; Growth; Larvae; Survival; Vitamin C; Chlorella; Epinephelus suillus; Rotifera.
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2537
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The effect of seasonality on the structure of rotifers in a black-water shallow lake in Central Amazonia Anais da ABC (AABC)
NOVA,CLARICE C.; LOPES,VANESSA G.; SOUZA,LEONARDO COIMBRA E; KOZLOWSKY-SUZUKI,BETINA; PEREIRA,TALITA A.A.; BRANCO,CHRISTINA W.C..
Rotifers have often been used as indicators of sudden changes in physical and chemical features of the aquatic environment. Such features vary greatly during flood pulse events in small lakes connected to major floodplains. However, few are the studies that investigate the consequences of the flood pulse in rotifer species composition, abundance, richness and diversity, especially in Amazonian lakes. We analyzed samples from a small blackwater lake of an “igarapé” connected permanently to the Negro river, in Central Amazonia. Samples were taken twice a year for two years, comprising flooding and receding periods of the flood pulse. Rotifer abundance increased significantly after draught events, and electrical conductivity and turbidity were intrinsically...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Floodplain; Flood pulse; “igarapé”; Rotifera; Zooplankton.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301359
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The influence of environmental factors on the seasonal dynamics and composition of Rotifera in the Sapucaí River arm of Furnas Reservoir, MG, Brazil Biota Neotropica
Negreiros,Natalia Felix; Santos-Wisniewski,Maria José dos; Santos,Renata Martins dos; Rocha,Odete.
Seasonal fluctuations in the dynamics of the plankton rotifer populations in an oligo-mesotrophic branch of a tropical reservoir were analyzed with respect to the possible influence of environmental conditions (physical, chemical and biological), with emphasis on biological interactions. Samples were taken monthly from August 2006 to July 2007. The well-defined climatic seasons were reflected in variations of the physical and chemical properties of the water. The zooplankton community consisted mainly of Rotifera, Cladocera and Copepoda, with occasional representatives of Chaoborus brasiliensis (Diptera), Ostracoda, Protozoa and Turbellaria. Rotifera was the dominant group in zooplankton community in 5 of the 12 months of the study and were represented by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rotifera; Furnas reservoir; Intra-zooplankton predation; Inter-specific competition.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000400023
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The use of biomarkers in <i>Daphnia magna</i> testing: 3. Rapid toxicity testing of pure chemicals and sediment pore waters using ingestion and digestive enzyme activity OMA
De Coen, W.M.; Vangheluwe, M.L.; Janssen, C.R..
In this study, 4 rapid (90 min) toxicity tests were developed using ingestion and digestive enzyme activity of <i>Daphnia magna</i> juveniles. Ingestion activity was assessed using fluorescent labelled latex micro-beads and digestive enzyme activity (trypsin, beta-galactosidase and esterase) was measured in homogenates using chromogenic (N-benzoyl-L-arginine-4-nitroanilide) and fluorogenic (4-methylumbelliferyl-B-D-galactoside and fluorescein diacetate) substrates.All assays and toxicity endpoints were evaluated for their potential use as routine toxicity testing tools for pure chemicals and sediment pore waters. The observed high correlation coefficients (r(2)>0.9) between the short-term toxicity values and the acute toxicity endpoint (24h...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Assimilation; Assimilation; Exposure; Exposure; Filtration; Respiration; Zooplankton; Daphnia magna; Rotifera.
Ano: 1998 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7488
Registros recuperados: 22
Primeira ... 12 ... Última
 

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