2022 - 2021 - 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 - 2013 - 2012 - 2011 - 2010 - 2009 - 1998
Updated on 13/06/2022
ALMEIDA-CORRÊA, T.; FRAZÃO, L.; COSTA, D. M.; MENIN, M.; KAEFER, I. L. 2020. Effect of environmental parameters on squamate reptiles in an urban forest fragment in central Amazonia. Acta Amazonica v. 50, n. 3, pp. 239-245. DOI: http://dx.doi.org/10.1590/1809-4392201904423. Key Words: amphisbaenians, edge effect, lizards, snakes, urban ecology. Available online
CALLE-RENDÓN, B. R.; TOLEDO, J. J. de; MUSTIN, K.; HILÁRIO, R. R. 2020. Drivers of primate richness and occurence in a naturally patchy landscape in the Brazilian Amazon. Biodiversity and Conservation, v. 29, pp. 3369-3391. DOI: https://doi.org/10.1007/s10531-020-02028-z. Palavas-chave: Amapá, habitat amount, human-modified landscape, primate conservation, savanna, scale of effect. Disponivel online
CAMPOS, Z.; MUNIZ, F.; MOURÃO, G.; MAGNUSSON, W. E. 2020. Responses of crocodilians to construction of a hydroelectric dam on the Madeira River in the Brazilian Amazon. Herpetological Journal, v. 30 (october 2020), pp. 215-221. DOI: https://doi.org/10.33256/hj30.4.215221. Key Words: environmental impact, dam, crocodilians, Amazonia, conservation. Available online
CARVALHO, W. D.; MEYER, C. F.; XAVIER, B. S.; MUSTIN, K.; CASTRO, I. J.; SOUSA, S. M. S.; PATHEK, D. B.; CAPAVERDE JR, U, D.; HILÁRIO, R. R.; TOLEDO, J. J. de. 2020. Consequences of Replacing Native Savannahs with Acacia Plantations for the Taxonomic, Functional and Phylogenetic α and ß-Diversity of Bats in the Northern Brazilian Amazon. Frontiers in Ecology and Evolution, v. 8, p. 609214. DOI: 10.3389/FEVO.2020.609214. Key Words: Amazonian ecosystems, Amazonian savannahs, Chiroptera, landscape change, Lavrados de Roraima, non-forest habitats. Available online
COSTA, F. R. C.; ZUANON, J. A. S.; BACCARO, F. B.; ALMEIDA, J. S. de; MENGER, J. da S.; SOUZA, J. L. P.; BORBA, G. C.; ESTEBAN, E. J. L.; BERTIN, V. M.; GEROLAMO, C. S.; NOGUEIRA, A.; CASTILHO, C. V. de. 2020. Effects of climate change on Central Amazonian Forests: a two decades synthesis of monitoring tropical biodiversity. Oecologia Australis, v. 24, n. 2, pp. 317-335. DOI: https://doi.org/10.4257/oeco.2020.2402.07. Key Words: community ecology, functional ecology, LTER, long-term ecological sites. Available on line
DAMBROS, C. S.; MORAIS, J. W. ; VASCONCELLOS, A.; FRANKLIN, E. 2020. Defining a termite sampling protocol for ecological studies: An effective method to increase statistical power. European Journal of Soil Biology, v. 96, p. 103145. Palavras Chave: Jones & Eggleton protocol, Social insect, species distribution, transect method, Termite survey, Trophic groups, Beta-diversity. Available online
DAMBROS, C.; ZUQUIM, G.; MOULATLET, G. M.; COSTA, F. R. C.; TUOMISTO, H.; RIBAS, C. C.; AZEVEDO, R.; BACCARO, F.; BOBROWIEC, P. E. D.; DIAS, M. S.; EMILIO, T.; ESPIRITO-SANTO, H. M. V.; FIGUEIREDO, F. O. G.; FRANKLIN, E.; FREITAS, C.; GRAÇA, M. B.; D"HORTA, F.; LEITÃO, R. P.; MAXIMIANO, M.; MENDONÇA, F. P.; MENGER, J.; MORAIS, J. W.; SOUZA, A. H. N. de; SOUZA, J. L. P.; TAVARES, V. da C.; VALE, J. D. do; VENTICINQUE, E. M.; ZUANON, J.; MAGNUSSON, W. E. 2020. The role of environmental filtering, geographic distance and dispersal barriers in shapping the turnover of plant and animal species in Amazonia. Biodivers Conserv 29, 3609-3634. DOI: https//doi.org/10.1007/s10531-020-02040-3. Key Words: Tropical forest, species distribution, community composition, endemism areas, environmental filtering, Ferns, Termites, Birds, Bats, Gingers, Fish, Palms, Ants, Butterflies. Available online.
DORIA, C. R. C.; ATHAYDE, S.; LIMA, H. M. de; CARVAJAL-VALLEJOS, F. M.; DUTKA-GIANELLI, J. 2020. Challenges for the governance of small-scale fisheries on the Brazil-Bolivia transboundary region. Society & Natural Resources. DOI: 10.1080/08941920.2020.1771492. Key Words: Amazon, common-pool resources, fisheries governance, inland fisheries, riverine communities, transboundary fisheries systems. Available online
DORIA, C. R. C.; DUTKA-GIANELLI, J.; SOUSA, S. T. B. de; CHU, J.; GARLOCK, T. M. 2020. Understanding impacts of dams on the small-scale fisheries of the Madeira River through the lens of the Fisheries Performance Indicators. Marine Policy. DOI: https://doi.org/10.1016/j.marpol.2020.104261. Key Words: Amazon, Fisheries, Development, Riverine communities, Fishery evaluation indicators. Available online
ESTEBAN, E. J. L.; CASTILHO, C. V.; MELGAÇO, K. L.; COSTA, F. R. C. 2020. The outher side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest. New Phytologist, v. earlyv, p. 1, 2020. Available em https://doi.org/10.1111/nph.17005
FADINI, S. R. M. C.; BARBOSA, R. I.; RODE, R.; CORRÊA, V.; FADINI, R. 2020. Above-ground biomass estimation for a shrubby mistletoe in an Amazonian savanna. Journal of Tropical Ecology, 36(1), 6-12. DOI:10.1017/S0266467419000294. Key Words: Epiphytes, fire-prone savanna, hemiparasites, host-parasite interactions. Available online
FARIAS, H. L. S.; SILVA, W. R.; PERDIZ, R. de O.; CITÓ, A. C.; CARVALHO, L. C. da S.; BARBOSA, R. I. 2020. Dataset on wood density of trees in ecotone forests in Northern Brazilian Amazonia. Dataset on wood density of trees in ecotone forests in Northern Brazilian Amazonia. Data in Brief, v. 30: June 2020, 105378. DOI: https://doi.org/10.1016/j.dib.2020.105378. Palavras Chave: Specific gravity, Forest ecology, Tropical forest, Tree, Wood technology. Available online
FERRÃO, M.; MORAVEC, J.; HANKEN, J.; LIMA, A. P. 2020. A new species of Dendropsophus (Anura, Hylidae) from southwestern Amazonia with a green bilobate vocal sac. ZooKeys, 942: 77-104. DOI: https://doi.org/10.3897/zookeys.942.51864. Key Words: Amphibia, advertisement call, Amazonian biodiversity, Dendropsophus microcephalus species group, Dendropsophus bilobatus sp. nov., integrative taxonomy, morphology, upper Madeira River. Available online
FERREIRA, A. S.; LIMA, A. P.; JEHLE, R.; FERRÃO, M.; STOW, A. 2020. The influence of environmental variation on the genetic structure of a poison frog distributed across continuous Amazonian rainforest. Journal of Heredity, 2020, pp. 457-470. DOI: 10.1093/hered/esaa034. Key Words: RADseq, genetic clusters, landscape genetics, Amazonia, amphibians. Available online
FONSÊCA, K. A.; FIGUEIREDO, D. G.; CELLA-RIBEIRO, A.; DORIA, C. R. da C. 2020. Bioecologia reprodutiva e alimentar do peixe elétrico Sternarchella calhamazon (Gymnotiformes) da bacia do rio Madeira. Revista Brasileira de Ciências da Amazônia, v. 9, n. 3, pp. 90-106. ISSN 2317-5729 (edição online). Key Words: Amazônia, ecologia trófica, peixe bentônico, ecologia reprodutiva. Available online
GADELHA, S. de S.; COSTA, G. da S.; ALMEIDA e SILVA, A. de. 2020. New Braconidae (Hymenoptera: Ichneumonoidea) records from Cuniã Ecological Station, Porto Velho, Rondônia, Brazilian Western Amazon. Rev. Bras. de Ciências da Amazônia 9(3): 36-45. Key Words: Parasitoids, Microgastrinae, Doryctinae, diversity. Available online
JACOBI, C. M.; VILLAMARÍN, F.; CAMPOS-SILVA, J. V.; JARDINE, T.; MAGNUSSON, W. E. 2020. Feeding of Arapaima sp.: integrating stomach contents and local ecological knowledge. J Fish Biol. 2020 Jul;97(1):265-272. DOI: 10.1111/jfb.14372. Key Words: Amazon, diet, ethnobiology, ichthyology, predator. Available online
JORGE, R. F.; FERRÃO, M.; LIMA, A. P. 2020. Out of Bond: A new threatened harlequin toad (Bufonidae, Atelopus) from the outer borders of the Guiana shield in Central Amazonia described through integrative taxonomy. Diversity 12, 310. DOI: 10.3390/d1208310. Key Words: conservation, genetics, integrative taxonomy, morphology, vocalization. Available online
JORGE, R. F.; MAGNUSSON, W. E.; SILVA, D. A. da; POLO, E. M.; LIMA, A. P. 2020. Urban growth threatens the lowland Amazonian Manaus harlequin frog which represents and evolutionarily significant unit within the genus (Amphibia: Anura: Bufonidae). Journal of Zoological Systematics and Evolutionary Research, v. 1, p. jzs. 12390-11. DOI:10.1111/jzs.12390. Key Words: Amazonia Central, heterogeneidade ambiental, risco de extinção, modificação ambiental, sapo arlequim. Available online
LIMA, J. M.; CASTRO, A. B.; LIMA, A. P.; MAGNUSSON, W. E.; LANDEIRO, V. L.; FADINI, R. F. 2020. Influência do regime de queimadas sobre a riqueza e composição florística de uma savana isolada na Amazônia - PELD Oeste do Pará. Oecologia Australis, v. 24, n. 2, pp. 301-316. DOI: https://doi.org/10.4257/oeco.2020.2402.06. Key Words: Cerrado amazônico, mosaico de vegetação, pesquisa ecológico de longa duração. Available on line
LIMA, M. A. L.; DORIA, C. R.; CARVALHO, A. R.; ANGELINI, R. 2020. Fisheries and trophic structure of a large tropical river under impoundment. Ecologial Indicators, v. 113, June 2020, 106162. DOI: https://doi.org/10.1016/j.ecolind.2020.106162. Palavras Chave: Fisheries management, Trophic impact matrix, Damming, Amazonian River, Ecopath with Ecosim. Available online
LIMA, A. P.; FERRÃO, M.; SILVA, D. L. da. 2020. Not as widespread as throught: Integrative taxonomy reveals cryptic diversity in the Amazonian nurse frog Allobates tinae Melo-Sampaio, Oliveira and Prates, 2018 and description of a new species. Journal of Zoological Systematics and Evolutionary Research, v. 58, n. 4, pp. 1173-1194. DOI: 10.1111/jzs.12406. Key Words: Amazonia, bioacoustics, egg coloration, interfluve purus, Madeira, morphology, tadpoles. Available online
LOURENÇO, I. H.; ANJOS, M. R.; BARREIROS, J. P. S. R. 2020. Low-cost technology for fish monitoring applied to the fishing of two species of pacu in Amazonas, Brazil. Boletim do Instituto de Pesca (Online), v. 46, pp. 1-6. Key Words: Sul do Amazonas, pesca Artesanal, manejo Pesqueiro. Available online
MAGNUSSON, W. E. 2020. Environmental Forum, v. 37, Issue 3, May-June 2020, pp. 27-31.
MAGNUSSON, W. E.; ROSA, C.; LAYME, V. M. G.; GHIZONI JR., I. R.; LIMA, A. P. 2020. Local effects of global climate on a small rodent Necromys lasiurus. Journal of Mammalogy, XX(X):1-7, 2020. DOI: 10.1093/jmammal/gyaa140. Key Words: Amazon, climate change, metapopulation, population fluctuation, small mammals, Southern Oscillation Index. Available online
MATOS, L. C. N. de; SANTANA, F. D.; BACCARO, F. B. 2020. Relações alométricas entre os tamanhos de sementes artificiais removidas e de formigas em um fragmento florestal na Amazônia Central. Bol. Mus. Para. Emílio Goeldi, Cienc. Nat., Belém, v. 15, n. 1, pp. 155-164, jan-abr. 2020. Key Words: Comportamento, Mirmecocoria, Mutualismo, Floresta Tropical. Available online
MOTA. E. P.; KAEFER, I. L.; NUNES, M. da S.; LIMA, A. P.; FARIAS, I. P. 2020. Hidden diversity within the broadly distributed Amazonian giant monkey frog (Phyllomedusa bicolor: Phyllomedusidae). Amphibia-Reptilia, n. 41, pp. 439-359. DOI: 10.1163/15685381-bja10003. Key Words: cryptic diversity, genetic diversity, Phyllomedusidae, phylogeography, tropical rainforest. Available online
PEIXOTO, G. M.; De Fraga, R.; ARAÚJO, M. C.; KAEFER, I. L.; LIMA, A. P. 2020. Hierarchical effects of historical and environmental factors on lizard assemblages in the upper Madeira River, Brazilian Amazonia. PLoS ONE 15(6): e0233881. DOI:https://doi.org/10.1371/journal.pone.0233881. Available online
PENHACEK, M.; ANJOS, S.; OLIVEIRA, E.; HERNÁNDEZ-RUZ, E. J.; RODRIGUES, L. R.; GUERRA, V.; RODRIGUES, D. 2020. First record of Vitreorana ritae (Anura, Centrolenidae) for southern Amazonia inferred from molecular, reproductive and acoustic evidence. Caldasia, 42(2): xx-xx, Julio-diciembre. DOI:https://dx.doi.org/10.15446/caldasia.v42n2.79487. Key Words: Acoustic parameters, Amazon-Cerrado ecotone, glass frog, intraspecific genetic variation. Available online
PEQUENO, P.; MENDEL, B.; ROSA, C.; BOSHOLN, M.; SOUZA, J. L.; BACCARO, F.; BARBOSA, R.; MAAGNUSSON, W. 2020. Air transportation, population density and temperature predict the spread of COVID-19 in Brazil. PeerJ 8:e9322. DOI: https://doi.org/10.7717/peerj.9322. Key Words: Biogeography, ecology, epidemiology, Science and Medical Education, climate, coronavirus, health, pandemic. Available on line
ROCHA, E. X.; SHIETTI, J,; GEROLAMO, C. S.; BURNHAM, R. B.; NOGUEIRA, A. 2020. Higher rates of liana regeneration after canopy fall drives species abundance patterns in central Amazonia. Journal of Ecology, v. 00, p. 1–11. DOI: 10.1111/1365-2745.13345. Palavras Chave: adventitious roots, Amazonia, Bignoniaceae, canopy gap, disturbance, forest dynamic, resprouters, treefall. Available online
ROJAS, D.; LIMA, A. P.; MOMIGLIANO, P.; SIMÕES, P. I.; DUDANIEC, R. Y.; AVILA-PIRES, T. C. S.; HOOGMOED, M. S.; BITAR, Y. O. da C.; KAEFER, I. L.; AMÉZQUITA, A.; STOW, A. 2020. The evolution of polymorphism in the warning coloration of the Amazonian poison frog Adelphobates galactonotus. Heredity (2020): v. 124, pp. 439-456. DOI: https://doi.org/10.1038/s41437-019-0281-4. Available online
SALES, N. G.; KAIZER, M. da C.; COSCIA, I.; PERKINS, J. C.; HIGHLANDS, A.; BOUBLI, J. P.; MAGNUSSON, W. E.; SILVA, M. N. F. da; BENVENUTO, C.; McDEVITT, A. D. 2020. Assessing the potential of environmental DNA metabarcoding for monitoring Neotropical mammals: a case study in the Amazon and Atlantic Forest, Brazil. Mammal Review (2020), Short Communication, p. 1-5. DOI: https://doi.org/10.1111/mam.12183. Palavras Chave: Brazil, camera traps, Critically Endangered, eDNA, mammals, river, terrestrial. Available online
SANTANA, M. D. F.; VARGAS-ISLA, R.; NOGUEIRA, J. da C.; ACCIOLY, T.; SILVA, B. D. B. da; COUCEIRO, S. R. M.; BASEIA, I. G.; ISHIKAWA, N. K. 2020. Obtaining monokaryotic and dikaryotic mycelial cultures of two Amazonian strains of Geastrum (Geastraceae, Basidiomycota). Acta Amazonica, v. 50, n. 1, p. 61 - 67. DOI: http://dx.doi.org/10.1590/1809-4392201901341. Palavras Chave: earthstars; gasteroid fungus; Geastrum lloydianum; Geastrum subiculosum; mycelial growth. Available online
SANTOS, E. A. dos; MEDEIROS, M. B.; FERREIRA, E. J. L.; SIMON, M. F.; OLIVEIRA, W. L.; COSTA, F. R. C. 2020. Palm distribution patterns in the southwestern Brazilian Amazon: Impact of a large hydroelectric dam. Forest Ecology and Management, v. 463, 118032. DOI: https://doi.org/10.1016/j.foreco.2020.118032. Palavras Chave: Arecaceae, Campinarana, Environmental impacts, Extreme weather events, Madeira River, Várzea forests, Terra-firme forests. Available online
SILVA, E. P. da; BORBA, G. C.; MAGALHÃES, C.; ZUANON, J.; MAGNUSSON, W. E. 2020. Habitat segregation among freshwater shrimp species in an Amazonian rainforest stream system. Freshwater Biology 2020; 65: p. 674-687. DOI: 10.1111/fwb.13458. Key Words: apparent competition, habitat dimensions, predator composition, resource partitioning, catchment. Available online
SILVA, R. C.; SILVEIRA, M.; VERDE, R. S. 2020. Vertical stratification of phyllostomid bats assemblage (Chiroptera, Phyllostomidae) in a florest fragment in Brazilian Southwestern Amazon. Neotropical Biology and Conservation 15(2): pp. 107-120. Doi: 10.3897/neotropical.15.e47641 .Key Words: Chiroptera, diversity, feeding guilds, habitat use, species composition. Available online
SINHORIN, A. P.; KERKHOFF, J.; OGLIO, E. L. D.; RODRIGUES, D. de J.; VASCONCELOS, L. G. de; SINHORIN, V. D. G. 2020. Chemical profile of the paratoid gland secretion of the Amazonian toad (Rhinella margaritifera). Toxicon 182, pp. 30-33. DOI: https://doi.org/10.1016/j.toxicon.2020.04.106. Key Words: Bufonidae, Bufadienolides, Amazonian anuranfauna. Available online
SILVESTRE, S. M.; CALLE-RÉNDON, B. R.; TOLEDO, J. J. de; HILÁRIO, R. R. 2020. Drivers of hunting in the savannahs of Amapá: implications for conservation, ORYX, v. 54, pp. 1-7. DOI: https://doi.org/10.1017/S0030605319000085. Key Words: Amazon, Amazonian savannah, bushmeat, Cerrado of Amapá, commercial hunting, game species, subsistence hunting, wild meat. Available online
SOUSA, T. R.; SCHIETTI, J.; COELHO DE SOUZA, F.; ESQUIVEL-MUELBERT, A.; RIBEIRO, I. O.; EMÍLIO, T.; PEQUENO, P. A. C. L.; PHILLIPS, O.; COSTA, F. R. C. 2020. Palms and trees resist extreme drought in Amazon forests with shallow water tables. Journal of Ecology. DOI: 10.1111/1365-2745.13377. Palavras Chave: water table, groundwater, Arecaceae, drought, extreme events, forest dynamics, tropical forest, climate change. Available online
SOUZA, E.B.R., SOUSA-JÚNIOR, P.T., VASCONCELOS, L.G., RODRIGUES, D.J., SINHORIN, V.D.G., KERKHOFF, J., PELISSARI, S.R.N., SINHORIN, A.P., 2020. Comparative study of the chemical profile of the parotoid gland secretions from Rhaebo guttatus from different regions of the Brazilian Amazon. Toxicon 179, pp. 01-106. DOI: https://doi.org/10.1016/j.toxicon.2020.03.005. Key Words: Rhaebo guttatus, Amazon, Bufonidae, Methanolic extracts, chemical profile. Available online
SOUZA, J. L. P.; FERNANDES, I. O. 2020. Do spatial and temporal scales affect the efficiency of surrogates in ant monitoring on the hydroelectric power-plant area in Brazilian Amazon? Ecological Indicators, DOI: https://doi.org/10.1016/j.ecolind.2020.107158. Key Words: Amazon, Madeira River, Species occurence, Standardized sampling protocol, Tropical forest. Available online
SOUZA, M. C. de; FADER, A. A. C.; SILVEIRA, M.; LIESENFELD, M. V. A. 2020. Diodia kuntzei K. Schum (Rubiaceae, Spermacoceae): a new record for the state of Acre, Brazil. Check List 16(3): pp. 675-679. DOI: https://doi.org/10.15560/16.3.675. Key Words: Alto Juruá flora, geographic distribution, taxonomy. Available online
ter STEEGE, H.; PRADO, P. I.; LIMA, R. A. F. de; POS, E.; COELHO, L. de S.; LIMA FILHO, D. de A.; SALOMÃO, R. P.; AMARAL, I. L.; MATOS, F. D. de A.; CASTILHO, C. V.; PHILLIPS, O. L.; GUEVARA, J. E.; CARIM, M. de J. V.; LÓPEZ, D. C.; MAGNUSSON, W. E. et al. 2020. Biased-corrected richness estimates for the Amazonian tree flora. Scientific Reports (2020) 10:10130. DOI: https://doi.org/10.1038/s41598-020-66686-3. Available online
TODESCHINI, F.; TOLEDO, J. J.; ROSALINO, L. M. C.; HILÁRIO, R. R. 2020. Niche differentiation mechanisms among canopy frugivores and zoochoric trees in the northeastern extreme of the Amazon. Acta Amazonica, v. 50, pp. 263-272. DOI: https://dx.doi.org/10.1590/1809-4392202000732. Key Words: Amapá National Forest, frugivory, phenology, seed dispersal, tropical rainforest. Available online
TORRALVO, K.; MAGNUSSON, W. E.; DURGANTE, F. 2020. Efectiveness of Fourier transform near-infrared spectroscopy spectra for species identification of anurans fixed in formaldehyde and conserved in alcohol: A new tool for integrative taxonomy. Journal of Zoological Systematics and Evolutionary Research, p. 1-14. DOI: 10.1111/jzs.12442. Key Words: Amazonian frog, near-infrared spectroscopy, species identification, taxonomy, methods, zoological collections. Available online
TORRES, M. T.; SOUZA, J. L.; BACCARO, F. B. 2020. Distribution of epigeic and hypogeic ants (Hymenoptera: Formicidae) at ombrophilous forests in the Brazilian Amazon. Sociobiology, v. 67, pp. 186-200. Key Words: Amazonia, Community ecology, Environment gradient, Stratification, Subterranean. Available online
TOURINHO, A. L.; BECHIMOL, M.; PORTO, W.; PERES, C. A.; STORCK'TONON, D. 2020. Marked composition changes in harvestmen assemblages in Amazonian forest islands induced by a mega dam. Insect Conservation and Diversity, v. 13, pp. 432-444. DOI: https://doi.org/10.1111/icad.12398. Key Words: Conservation biology, landscape ecology, habitat fragmentation, hydroelectric dams, environmental quality, indicators species. Disponivel online
VALENCIA-AGUILAR, A.; RODRIGUES, D. de J.; PRADO, C. P. A. 2020. Male care status influences the risk-taking decisions in a glassfrog. Behavioral Ecology and Sociobiology 74:84. DOI: https://doi.org/10.1007/s00265-020-02869-2. Key Words: Anura, Hyalinobatrachium cappellei, Time allocation, Paternal care, Predation risk, Offspring survival. Available online
VICENTE, R. E.; SILVA, I. V. da; IZZO, T. J. 2020. Jardins de formigas: qual o estado do conhecimento sobre essas interações mutualísticas entre formigas e plantas? Bol. Mus. Para. Emílio Goeldi, Cienc. Nat., Belém, v. 15, n. 1, pp. 55-63, jan. - abr. 2020. Key Words: Camponotus femoratus, Crematogaster levior, dominância, mutualismo, parabiose. Disponivel online