|
|
|
| Registros recuperados: 5.225 | |
|
|
| Frota,Augusto; Ota,Renata Rúbia; Deprá,Gabriel de Carvalho; Ganassin,Maria Julia Mileo; Graça,Weferson Júnio da. |
| Abstract: The rio das Cinzas and rio Itararé basins are important tributaries of the rio Paranapanema, a major left-bank tributary of the upper rio Paraná basin. The upper reaches of both drainages intersect the northern portion of the APA Escarpa Devoniana (Devonian Escarpment Environment Protection Area, EPA), an area considered crucial for the preservation of biodiversity. This study aimed to provide an ichthyofaunistic inventory for headwater streams of the rio das Cinzas and rio Itararé basins, both within and off of the borders of the EPA, increasing the knowledge about the species already known from streams in the rio Paranapanema system. We found 32 fish species, representing five orders and 12 families. Siluriformes was the richest order followed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Altitudinal gradient; Devonian Escarpment; Faunal exchange; Upper rio Paraná. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100303 |
| |
|
|
| Hu, Denghui; Xu, Yongsheng. |
| With the development of satellite observation technology, higher resolution and shorter return cycle have also placed higher demands on satellite data processing. The non-tide high-frequency barotropic oscillation in the marginal sea produces large aliasing errors in satellite altimeter observations. In previous studies, the satellite altimeter aliasing correction generally relied on a few bottom pressure data or the model data. Here, we employed the high-frequency tide gauge data to extract the altimeter non-tide aliasing correction in the west Mediterranean Sea. The spatial average method and EOF analysis method were adopted to track the high-frequency oscillation signals from 15 tide gauge records (TGs), and then were used to correct the aliasing errors... |
| Tipo: Text |
Palavras-chave: Tide gauge; EOF analysis; De-aliasing; Altimeter. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00641/75262/75467.pdf |
| |
|
|
| Villon, Sébastien; Mouillot, David; Chaumont, Marc; Subsol, Gérard; Claverie, Thomas; Villéger, Sébastien. |
| Processing data from surveys using photos or videos remains a major bottleneck in ecology. Deep Learning Algorithms (DLAs) have been increasingly used to automatically identify organisms on images. However, despite recent advances, it remains difficult to control the error rate of such methods. Here, we proposed a new framework to control the error rate of DLAs. More precisely, for each species, a confidence threshold was automatically computed using a training dataset independent from the one used to train the DLAs. These species-specific thresholds were then used to post-process the outputs of the DLAs, assigning classification scores to each class for a given image including a new class called “unsure”. We applied this framework to a study case... |
| Tipo: Text |
|
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00640/75244/75406.pdf |
| |
|
|
| Penaud, Aurélie; Ganne, Axelle; Coste, Pierre-olivier; Herlédan, Maïwenn; Durand, Matthieu; Mojtahid, Meryem; Nizou, Jean; Toucanne, Samuel. |
| The high-time resolution (∼70 years in average) multi-proxy analysis conducted on the midshelf core CBT-CS11 (47°46.429’N; 4°25.308’W; 73m depth; 3.96 m long; NW France, S Brittany) revealed the complexity of the palaeohydrological and palaeoclimatic signals recorded over the last 7 kyrs in the recently published paper: “Oceanic versus continental influences over the last 7 kyrs from a midshelf record in the northern Bay of Biscay (NE Atlantic)” [1]. This study presents the whole CBT-CS11 dataset discussed in [1] including sedimentological (XRF and grain-size (total from [1] and CaCO3-free from [2]) analyses), geochemical (oxygen and carbon stable isotopes on two different benthic foraminiferal species: Ammonia falsobeccarii from [1] and Cibicides... |
| Tipo: Text |
Palavras-chave: Holocene; NE Atlantic Ocean; Pollen assemblages; Dinoflagellate cyst assemblages; Stable isotopes; Grain-size analysis; XRF. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00610/72209/71003.pdf |
| |
|
| |
|
| |
|
| |
|
|
| Streck-Marx,Morgana Taís; Castiglioni,Daniela da Silva. |
| Abstract: The current study describes a new species of Hyalella found in a natural pond at the municipality of Palmeira das Missões, located in the northwestern region of state of Rio Grande do Sul, southern Brazil. The new species differs from other species found in state of Rio Grande do Sul (Hyalella bonariensis, H. castroi, H. kaigang, H. imbya, H. georginae, H. gauchensis, H. montenegrinae and H. pampeana) in the type and number of setae on uropods, on telson and on the inner face of gnathopod 1. Besides, Hyalella palmeirensis is morphologically similar to H. curvispina, especially in the shape and number of setae of uropods. However, H. palmeirensis differs from H. curvispina in having only two simple setae on telson, the inner face of gnathopod 1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Freshwater crustaceans; Hyalella; Peracarida; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100203 |
| |
|
| |
|
|
| Menezes,Naércio A.; Ferreira,Katiane M.; Netto-Ferreira,André L.. |
| ABSTRACT A new species of the characid genus Knodus is described from the rio Aripuanã (rio Madeira basin). It can be distinguished from its congeners by its very low body depth, the presence of tri- to pentacuspid teeth on the outer premaxillary series, with the median cuspid larger than the lateral ones, the teeth of the inner premaxillary series pentacuspid, distinctly larger than those of the outer series, the maxillary teeth tri- to pentacuspid, with the median cusp slightly larger than the lateral ones, the four anteriormost dentary teeth pentacuspid, the smaller posterior teeth tri- to pentacuspid, a complete lateral line with 36-38 scales, 3 longitudinal scale series from pelvic fin origin to lateral line, and 11-12 circumpeduncular scales. The new... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bryconamericus; Distribution; Neotropical Fish; Systematics; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200208 |
| |
|
|
| Tobes,Ibon; Falconí-López,Ana; Valdiviezo-Rivera,Jonathan; Provenzano-Rizzi,Francisco. |
| ABSTRACT A new species of catfish is described from the Esmeraldas River Basin, Pacific slope, northern Ecuador. Tentatively included in Microglanis, represents the second species of the genus inhabiting the Trans-Andean region. The new species is distinguished from known congeners by a unique combination of external characteristics: head and body color pattern, uniform, pale brown, yellowish or grayish, without any kind of blotches, bands or dots, only a lunate transverse band, dark or black, at caudal-fin origin; adipose-fin origin and forward without lighter or luminous areas. Compared with M. variegatus, the new species has morphometric differences, such as the distances between dorsal and pelvic fins, and between posterior nostrils. Some osteological... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Richness; Systematic; Taxonomy; Trans-Andean region. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200211 |
| |
|
|
| Miranda,Vinicius da Rocha; Rodrigues,Andrielle Raposo; Brasil,Ana Claudia dos Santos. |
| Abstract Ophryotrocha is the most speciose genus within Dorvilleidae, with species occurring in a great variety of environments around the globe. In Brazil, records of Ophryotrocha are scarce and no specific identification is provided for any of the records. Herein we describe a new species of Dorvilleidae, Ophryotrocha zitae sp. nov. Adult and larval specimens were found in the axis of a fragment of the cold-water coral Lophelia pertusa, sampled off São Paulo’s coast, at a depth of 245 m. Both forms are described and illustrated. This new species resembles O. puerilis, O. adherens and O. eutrophila, but can be distinguished based on differences in its mandible and on chaetae shape and arrangement. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epibiont Cold-water Coral Deep-sea Eunicida; Associated fauna. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492020000100213 |
| |
|
|
| Silva-Junior,Dario Ernesto da; Ramos,Telton Pedro Anselmo; Zanata,Angela Maria. |
| ABSTRACT A new species of Parotocinclus, apparently endemic to the rio Jacuípe basin, Bahia State, Brazil, is described. The new species is distinguished from congeners, except P. bidentatus, P. cabessadecuia, P. dani, P. halbothi, P. muriaensis, P. pentakelis, P. seridoensis, and P. spilurus, by the presence of a reduced adipose fin. The new species differs from the aforementioned species by the absence of unicuspid accessory teeth, abdomen with broad naked areas between lateral and medial patches of plates, and snout tip completely covered by plates and odontodes. The adipose fin of the new species is restrict solely to the adipose-fin spine, lacking the adipose-fin membrane, a reduction pattern previously described to P. halbothi, a congener from rivers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cascudinho; Catfishes; Northeastern Mata Atlântica freshwater ecoregion; Siluriformes; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200207 |
| |
|
|
| Santos-Silva,Antonio; Botero,Juan Pablo; Nascimento,Francisco Eriberto de Lima; Silva,Weliton Dias. |
| Abstract We studied 18 cerambycid beetle species native to South America. Seventeen represent new state records in Brazil. Particularly, Chlorethe scabrosaZajciw, 1963 is newly reported for the state of Rio de Janeiro with exclusion of C. brachypteraZajciw, 1963. The Brazilian state of the type locality of Dufauxia guaicurana Lane, 1955 is fixed. Pirangoclytus mendosus (Galileo & Martins, 1996) is synonymized with P. mniszechii (Chevrolat, 1862), and its holotype is a female. Variation on Trypanidius maculatus Monné & Delfino, 1980 is commented. New country and department records for Paraguay are also provided. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian savanna; Longhorned beetles; Paraguay; Semiochemical traps; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492020000100210 |
| |
|
|
| Ferreira,Angélica Cândida; Araújo,Josiane Silva; Almeida Jr,Eduardo Bezerra de; Zickel,Carmen Silvia. |
| Abstract: In the present work, we synonymize Micropholis compta under M. gardneriana due to the overlap of morphoanatomical characters and the absence of distinctive attributes, verified during taxonomic and anatomical study of the genus Micropholis for Brazil. This study provides an updated description of M. gardneriana, including macro- and micro-morphological data, a distribution map, and comments on conservation status, ecological and taxonomy. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Chrysophylloideae; Leaf anatomy; Neotropics; South America; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100501 |
| |
|
|
| Hussain, Mohamed Bakr; Laabir, Mohamed; Yahia, Mohamed Nejib Daly. |
| Copepods are excellent bioindicators of climate change and ecosystem pollution in anthropized coastal waters. This work reviewed the results of previous studies examining changes in egg production rate (EPR), hatching success (HS), and nauplius survival rate (NSR) in natural conditions and in the presence of pollutants, including heavy metals and organic contaminants such as polycyclic aromatic hydrocarbons (PAHs) and persistent organic pollutants (POPs). At high concentrations, cadmium and silver induce an increase in EPR in the copepods Acartia tonsa and Acartia hudsonica, while exposure to mercury decreases EPR in adults by 50%. All three metals affect HS, with mercury inducing a stronger effect than cadmium and silver. Cadmium affects reproductive... |
| Tipo: Text |
Palavras-chave: Planktonic copepods; Reproductive traits; Ecotoxicology. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00623/73498/72789.pdf |
| |
|
|
| Lavergne, C.; Vic, Clement; Madec, G; Roquet, F.; Waterhouse, A. F.; Whalen, C. B.; Cuypers, Y.; Bouruet‐aubertot, P.; Ferron, Bruno; Hibiya, T.. |
| Vertical mixing is often regarded as the Achilles' heel of ocean models. In particular, few models include a comprehensive and energy‐constrained parameterization of mixing by internal ocean tides. Here, we present an energy‐conserving mixing scheme which accounts for the local breaking of high‐mode internal tides and the distant dissipation of low‐mode internal tides. The scheme relies on four static two‐dimensional maps of internal tide dissipation, constructed using mode‐by‐mode Lagrangian tracking of energy beams from sources to sinks. Each map is associated with a distinct dissipative process and a corresponding vertical structure. Applied to an observational climatology of stratification, the scheme produces a global three‐dimensional map of... |
| Tipo: Text |
Palavras-chave: Ocean mixing; Internal tides; Parameterization; Energy dissipation. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00624/73573/72943.pdf |
| |
|
| |
|
| |
|
|
| Neto, Benedito Silva. |
| O artigo tem como objetivo demonstrar que uma planificação ecológica pode se constituir em um instrumento para uma promoção democrática e eficiente da sustentabilidade da agricultura. O referencial teórico adotado no artigo é baseado na obra de Györg Lukács dedicada a ontologia do ser social. Este referencial fundamentou a elaboração de um modelo de programação linear, cujas características são discutidas por meio da análise da sua estrutura formal e de exemplos numéricos. O pressuposto sobre o qual se baseia a formulação do modelo, de que as riquezas sociais, na forma de produtos para consumo final, meios de produção e recursos naturais, são variáveis exógenas que devem ser definidas por decisões políticas, permite demonstrar que o modelo é compatível com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sustentabilidade; Planificação democrática; Modelo de planificação.. |
| Ano: 2020 |
URL: http://periodicos.ufsm.br/extensaorural/article/view/42985 |
| |
| Registros recuperados: 5.225 | |
|
|
|
