Zobrazeno 1 - 10 of 14 pro vyhledávání: '"Samuel Segnini"'
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Akademický článek
Mayflies (Insecta: Ephemeroptera) from Venezuela
Autor: María Chacón, Manuel Pescador, Michael Hubbard, Samuel Segnini
Publikováno v: Check List, Vol 5, Iss 3, Pp 723-731 (2009)
A list of the known mayfly (Ephemeroptera) fauna of Venezuela is given, along with the states and bioregions from which each species is known. Depositions of the type specimens of each species are also listed.
Externí odkaz: https://doaj.org/article/baa83c4fa915498a87d4ffc5fbf17bfe
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2
Update on Chagas disease in Venezuela during the period 2003-2018. A review
Autor: Gladys Crisante, Samuel Segnini, Néstor Añez, Oneida Espinoza-Álvarez, Agustina Rojas, Marta Maria Geraldes Teixeira
Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
The present article reviews the status of Chagas disease in Venezuela during the period 2003-2018, based on the detection of Trypanosoma cruzi-infection in 3,343 blood samples of individuals from rural localities and 182 patients referred from health
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbf9abc62619a730e8843ccd0632dc32
https://pubmed.ncbi.nlm.nih.gov/31862464
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3
Temperature and daily emergence of seven genera of Ephemeroptera (Insecta) in a cloud forest stream of tropical Andes
Autor: Samuel Segnini, Daniela Briceño, María M. Chacón
Publikováno v: Revista de Biología Tropical; Vol. 64 No. 1 (2016): Volume 64 – Regular number 1 – March 2016; 117-130
Revista de Biología Tropical; Vol. 64 Núm. 1 (2016): Volumen 64 – Número regular 1 – Marzo 2016; 117-130
Revista Biología Tropical; Vol. 64 N.º 1 (2016): Volumen 64 – Número regular 1 – Marzo 2016; 117-130
Portal de Revistas UCR
Universidad de Costa Rica
instacron:UCR
Daily emergence of mayflies in Neotropical rivers and their causes have been poorly studied. In temperate zones, this process is better known and attributed to several factors. In this work, we studied the daily emergence of subimagines of several Ep
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2decaad1b282aa8d190f75bfc191800
https://revistas.ucr.ac.cr/index.php/rbt/article/view/17919
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4
The adult and redefinition of the genusPrebaetodesLugo-Ortiz & McCafferty (Ephemeroptera: Baetidae), with description of a new species from Venezuela
Autor: Samuel Segnini, María M. Chacón, Manuel L. Pescador
Publikováno v: Aquatic Insects. 32:143-157
The adult stage of Prebaetodes Lugo-Ortiz & McCafferty is described for the first time based on reared specimens from Venezuela. The adults of the genus can be distinguished from other genera of South American Baetidae by the following combination of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::796de1d62b0540d422710161e401e257
https://doi.org/10.1080/01650424.2010.482940
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5
Diet composition of the mature larvae of four Anacroneuria species (Plecoptera: Perlidae) from the Venezuelan Andes
Autor: María M. Chacón, Samuel Segnini, Maribet Gamboa
Publikováno v: Aquatic Insects. 31:409-417
The diet composition of the larvae of four Anacroneuria species from a Venezuelan river was studied (A. cacute, A. tachira, A. chorrera and A. paleta). Every four hours a D-net was used to obtain four samples in different sections of the channel. The
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e9ee68b9ee7b0e5fea04b585329df909
https://doi.org/10.1080/01650420802643537
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6
Size variation with elevation in adults and larvae of some Venezuelan stoneflies (Insecta: Plecoptera: Perlidae)
Autor: Samuel Segnini, Claudia Cressa, María M. Chacón, Vanesa Maldonado
Publikováno v: Aquatic Insects. 30:127-134
The objective of this study was to determine the relationship between body size and elevation in adults and larvae of five species of plecopterans of the genus Anacroneuria inhabiting the Chama River watershed (Merida State, Venezuela). Body size was
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::994cfa570db3650f3b4e88ad48fb5c85
https://doi.org/10.1080/01650420701858764
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7
Limnology of Andean piedmont rivers of Venezuela
Autor: Samuel Segnini, Donald C. Taphorn, J. D. Allan, George W. Kling, Alexander S. Flecker, Eric R. Sokol
Publikováno v: Journal of the North American Benthological Society. 25:66-81
We sampled 6 rivers of the piedmont region of Venezuela during the dry seasons of 1997 and 1998 to compare physical, chemical, and biological features and evaluate the influence of natural and anthropogenic differences in their watersheds. These 6 wa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::012749ec26a27c6a99d26aaeadce618d
https://doi.org/10.1899/0887-3593(2006)25[66:loapro]2.0.co
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8
Land Use in Watersheds of the Venezuelan Andes: a Comparative Analysis
Autor: Samuel Segnini, J. Erazo, Alexander S. Flecker, Luis E. Fernandez, Donald C. Taphorn, A. J. Brenner, J. D. Allan, Diana L. Karwan
Publikováno v: Conservation Biology. 16:527-538
The influence of deforestation on tropical watersheds has received limited study. We compared seven catchments in the Venezuelan Andes to examine variation in the relative extent of forested versus dis- turbed land and the potential consequences of c
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::df232b3aa7345a2ae32869cffbc71180
https://doi.org/10.1046/j.1523-1739.2002.02301.x
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9
Three New Species of Thraulodes (Ephemeroptera: Leptophlebiidae: Atalophlebiinae) from Venezuela
Autor: María M. Chacón, Eduardo Domínguez, Samuel Segnini
Publikováno v: Aquatic Insects. 21:249-257
Three new species of Thraulodes from Venezuela are described. One species is known from male and female imagines, and the other two only from male imagines. With this, the known Thraulodes species for Venezuela are four. A key for the male imagines o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7132f26e9edbae130164b0f0f00399b3
https://doi.org/10.1076/aqin.21.4.249.4504
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10
Chemical composition and larvicidal activity of Eugenia triquetra essential oil from Venezuelan Andes
Autor: Flor D, Mora, Jorge L, Avila, Luis B, Rojas, Rosslyn, Ramírez, Alfredo, Usubillaga, Samuel, Segnini, Juan, Carmona, Bladimiro, Silva
Publikováno v: Natural product communications. 5(6)
The chemical constituents of the essential oil obtained by hydrodistillation of the leaves of Eugenia triquetra O. Berg, collected in Táchira State, Venezuela, were identified by GC-MS analysis. Twenty-six components, which made up 88.5% of the oil,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::97cc92061102e4ec016b6a4088c75d8d
https://pubmed.ncbi.nlm.nih.gov/20614836
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