|
|
|
| Registros recuperados: 22 | |
|
|
| Marra,Raquel Cristina; Tremarin,Priscila Izabel; Algarte,Vanessa Majewski; Ludwig,Thelma Veiga. |
| Abstract We conducted a taxonomical study of epiphytic diatoms on the macrophytes Polygonum hydropiperoides, Ludwigia peruviana and Alternanthera philoxeroides collected in the mesotrophic reservoir Piraquara II flooded in 2009, located in the state of Paraná. A total of 135 infrageneric taxa were identified, among them five at generic level and other five are first records to the state. We provided illustration, valve metrics, meristics limits and taxonomic reference for each taxon. Also, life forms and species frequency are given. The most frequent diatoms totalized 15.3% of total identified taxa and sporadic species represented 54.7%. Achnanthidium minutissimum (Kützing) Czarnecki and Brachysira neoexilis Lange-Bertalot occurred in more than 90% of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillariophyta; Freshwater; Macrophytes; Mesotrophic; Periphyton; Taxonomy. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000400303 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Richard, Marion; Maurice, Julien-thomas; Anginot, Aurore; Paticat, Francois; Verdegem, M. C. J.; Hussenot, Jerome. |
| The main objectives of this investigation were to test the effects of (i) the presence of periphyton substrates, (ii) rearing density and (iii) supplemental feeding with dry feed on the growth and production of golden mullet (Liza aurata) juveniles. Twenty-six 1 m(2)-cages were installed in a French marine pond from April till June 2008. Mullets were stocked in cages with or without substrate at a density of 0, 20,40 or 60 individuals per cage. Each treatment was carried out in triplicate. In addition, 20 fish were put in three tanks and fed ad libitum with dry feed. The results showed that (i) although mullets were seen to graze on periphyton substrates, their presence did not affect,mullet growth and production. In future studies, meshed substrates could... |
| Tipo: Text |
Palavras-chave: Periphyton; Mullet; Extensive aquaculture; Artificial substrate; Marine pond. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00029/14067/11614.pdf |
| |
|
| |
|
|
| Signor,Altevir; Signor,Arcangelo Augusto; Boscolo,Wilson Rogério; Reidel,Adilson; Klein,Sidnei; Feiden,Aldi. |
| This study evaluated the periphyton production on artificial substrates considering it as a source of low cost live food for fish. Blades of artificial substrates such as wood, black plastic, acrylic, fiberglass, ceramics and glass (all with 144cm2 blades, 24 for each substrate) were submerged 20.0cm below the water column for 35 days in the winter and 42 days in the summer. The blades were randomly installed in 200m3 pond and evaluated for the biomass production at different phases during the summer and winter. Four blades of each substrate were collected weekly, and the periphytic community was carefully scraped with a spatula and fixed in 4% formaldehyde. The periphytic biomass productivity was evaluated by artificial substrate area and per day. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microorganisms-food; Hatchery; Periphyton; Phytoplankton.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000100072 |
| |
|
| |
|
| |
|
| |
|
|
| França,Raquel C.S; Lopes,Maria Rosélia Marques; Ferragut,Carla. |
| The colonization process and successional patterns of a periphytic algal community were evaluated in a Amazonian Viveiro Lake (Rio Branco, Acre, Brazil). Sampling was performed over a period of 35 days; at four-day intervals for 20 days, and then at five-day intervals. Water sampling for physical, chemical and biological analyses was done during the dry and rainy season. Glass slides were used as artificial substrates for periphyton colonization. The structural community was evaluated through population density, algae class, diversity indices and descriptive species. Species richness, diversity and evenness increased as succession progressed. While density of Bacillariophyceae, Euglenophyceae and Zygnemaphyceae increased with succession, Cyanobacteria... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Periphyton; Colonization; Succession; Diversity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672011000200010 |
| |
|
|
| Taniwaki,Ricardo Hideo; Borghi,Tatiana Cintra; Magrin,Albano Geraldo Emílio; Calijuri,Maria do Carmo; Bottino,Flávia; Moschini-Carlos,Viviane. |
| Much remains to be learned about biological diversity, which constitutes a valuable natural resource. Due to the pressure that human activity has put on natural resources, biodiversity has been reduced, often unbeknownst to those responsible for that activity. Therefore, we aimed to perform a quantitative and qualitative analysis of periphytic algae in the Itupararanga reservoir, correlating the results with the physical and chemical characteristics of the water, as well as with climatic conditions. To that end, five samples were collected at four sampling stations in the Itupararanga reservoir during the year 2010. Aquatic macrophytes were collected with a 156-cm² frame, and the periphytic algae were scraped free of the macrophytes with a brush. Samples... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Periphyton; Macrophytes; Water quality; Detrended correspondence analysis; Principal components analysis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300013 |
| |
|
|
| Moresco, Carina; UEM; Rodrigues, Liliana; UEM. |
| In order to analyze the structure and dynamics of the periphytic community in Iraí reservoir, an eutrophic environment, samples were taken in two seasons: summer (April) and winter (September) of 2002, in littoral areas from three regions of the reservoir (upper, intermediary and lower). Rooted aquatic vegetation were used as sampling substrates, because they were found in all sampling sites. A total of 297 species was recorded (225 in April, 73 exclusive taxa; and 224 in September, with 72 exclusive taxa). Bacillariophyceae predominated in all regions in both seasons, in species number, as well in density. There were differences in richness among zones; intermediary and lower regions were more similar, mainly in September. The periphytic algae density... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.05.00.00-9 reservoir; Periphyton; Richness; Abundance Ecologia. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/3764 |
| |
|
|
| Richard, Marion; Trottier, C.; Verdegem, M. C. J.; Hussenot, Jerome. |
| Periphyton is an additional food source in African and Asian brackish and freshwater fish ponds. The present study was a preliminary assessment of periphyton development on artificial substrates in temperate marine ponds. The effects of submersion time, substrate type, water depth, and total or partial sampling methods on the quantity and quality of periphyton collected, were evaluated. Four types of substrate (W: wooden poles, S: smooth fiber-glass strips, m: mosquito screen (1 mm-mesh) and M: garden netting (5 mm-mesh)) were deployed in a marine pond, and periphyton was collected 15 and 30 days later. The total amount of periphyton per substrate unit was collected as one sample or as 5 sub-samples. Results showed that (i) periphyton biomass in a marine... |
| Tipo: Text |
Palavras-chave: Aquaculture; Marine pond; Artificial substrate; Fouling; Periphyton. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7422.pdf |
| |
|
| |
|
|
| Plantecuny, M; Bodoy, Alain. |
| In order to estimate energetic relationship, microphytic and benthic bivalve levels of a shallow (1.5 m), sandy ecosystem near Marseille (Gulf of Fos, Southern France) were sampled monthly during 1.5 year, in two sites differing by their wave exposure. In the sheltered area, the bivalve Ruditapes decussatus was the dominant species, while another bivalve, Donax trunculus , was found in the open, wave exposed site. Chlorophyll a and primary production of the phytoplankton and the microphytobenthos, as well as population dynamic, growth and biochemical composition of bivalves (lipids, proteins and carbohydrates) were monitored. |
| Tipo: Text |
Palavras-chave: Ruditapes decussatus; Bivalvia; Periphyton; Phytoplankton; Biochemical composition; Growth; Marine molluscs; Hydrodynamics; Seasonal variations; Primary production; Trophic relationships. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1528.pdf |
| |
|
| |
|
| |
| Registros recuperados: 22 | |
|
|
|
