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| Registros recuperados: 137 | |
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| Melo,Adriano S.. |
| The relationship between community structure and environmental factors usually varies according to ecosystem type, group of organisms, and spatial scale. In this study I assessed whether dissimilarities among assemblages of stream macroinvertebrates are related to differences in environmental variables. Data consisted of macroinvertebrate samples of 10 stream sites during the dry season. Seven environmental variables were assessed. The relationship among dissimilarities in assemblage structure and dissimilarities in environmental variables was assessed using the BioEnv approach. Conductivity and measures related to stream size were the most important variables. However, part of the correlation with conductivity was due to the high value observed in a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic insects; BioEnv; Brazil; Community structure; Neotropical Region. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100013 |
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| Cordeiro,Danilo Pacheco. |
| Abstract With a big territory and variety of biomes, Brazil is one of the most diverse countries in the World, with insects massively contributing to this diversity. Although presenting impressive numbers, many groups are poorly known concerning their diversity and distribution. Also, the knowledge of the species diversity is very heterogeneous when comparing Brazilian states and regions. With a recent review of part of Lawrence Quate’s collection deposited at Natural History Museum of Los Angeles County, more than 70 new geographical records for Psychodidae species were found on the Neotropics, including one genera (Eurygarka) and seven species first recorded to Brazil. The complete known distribution of these species was compiled and is presented along... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Moth flies; Neotropical Region; Psychodinae; Brazilian fauna. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492020000100202 |
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| Seixas,Samantha A.; Amato,José F. R.; Amato,Suzana B.. |
| The impact of the discovery of Temnocephala haswelli Ponce de Léon, 1989, described as ectosymbionts of ampullariid apple snails outside of Uruguay, motivated us to collect a large number of specimens of Pomacea canaliculata (Lamarck, 1822) from several localities in the southern portion of the state of Rio Grande do Sul. This species was recorded three times after its description: in a study of chromosomes, in a study about the ultrastructure of the collar receptor cells, and in a study of the Haswell glands, all conducted in Uruguay. A total of 301 specimens of P. canaliculata were collected from 1999 to 2007. Temnocephalans found in the pallial cavity were identified as T. haswelli, which occurred in single infestations or concurrently with Temnocephala... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Mollusks; Neotropical Region; South America; Taxonomy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300020 |
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| Seixas,Samantha A.; Amato,José F. R.; Amato,Suzana B.. |
| Temnocephala rochensis Ponce de Léon, 1979, was the second of four species of Temnocephala Blanchard, 1849 to be described as ectosymbiont of ampullariid apple snails, Pomacea canaliculata (Lamarck, 1822). There have been no records of this Uruguayan species after its initial description. As part of the present study, 111 specimens of P. canaliculata were collected between 2003 and 2009. Temnocephalans found in the pallial cavity were identified as T. rochensis, occurring in single infestations, or concurrently with Temnocephala haswelli Ponce de Léon, 1989. Specimens of T. rochensis showed a conspicuous red eye pigment which faded after ethanol fixation. Important taxonomic characters of the reproductive system were evidenced by several techniques, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Mollusks; Neotropical Region; South America; Taxonomy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000500019 |
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| Ruiz,Gustavo R. S.; Brescovit,Antonio D.. |
| Gavarilla gen. nov. from Northeastern Brazil is proposed to include two new species: the type species Gavarilla ianuzziae sp. nov. from the State of Sergipe and Gavarilla arretada sp. nov. from the State of Maranhão. The genus presents the standard sitticine dentition and is presumably related to the genera Aillutticus Galiano, 1987, Nosferattus Ruiz & Brescovit, 2005, Capeta Ruiz & Brescovit, 2005 and Amatorculus Ruiz & Brescovit, 2005, with which it shares the similar high, rounded carapace. Two new species, Capeta cachimbo and Amatorculus cristinae, are also described from the State of Pará, and Amatorculus stygius Ruiz & Brescovit, 2005 is recorded for the first time from the State of Minas Gerais. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical Region; Systematics; Taxonomy. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200006 |
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| Meinhardt,Helena; Quadros,Aline F.; Araujo,Paula B.. |
| Based on field data, this study presents the growth curve of Balloniscus glaber Araujo & Zardo, 1995, a terrestrial isopod species found in Parque Estadual de Itapuã (PEI), Rio Grande do Sul, Brazil. Specimens were monthly sampled, from May 2004 to April 2005, at PEI. Captured individuals were sexed, their cephalothorax width was measured, and the growth curve was described according to von Bertalanffy's model. Male and female growth curves are described by the equations: Wt = 2.256[1-e-0.00394(t+91.128)] and Wt = 2.588[1-e-0.00301(t+101)], respectively. Curves show differential growth between males and females, with females reaching higher W<FONT FACE=Symbol>¥</FONT>, and a slower growth rate than males. Based on theses curves, life... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Life span; Terrestrial isopods; Neotropical Region; Von Bertalanffy. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400030 |
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| Rodrigues-Filho,Carlos Alberto de Sousa; Gurgel-Lourenço,Ronaldo César; Bezerra,Luis Artur Valões; Sousa,Wallace Alves de; Garcez,Danielle Sequeira; Lima,Sergio Maia Queiroz; Ramos,Telton Pedro Anselmo; Sánchez-Botero,Jorge Iván. |
| Abstract Humid highland forest enclaves are remnants of Atlantic Forest found in tablelands within the Caatinga biome (Northeastern Brazil), which emerged during interglacial periods in the Pleistocene. These ecosystems have a highly diverse and endemic fish fauna. Most earlier surveys have focused on the tableland of Borborema (Pernambuco and Paraíba States). In this study we surveyed the fish fauna of the humid forest enclaves in the tablelands of Ibiapaba and Araripe, based on samples collected in the rainy season (March and April) between 2009 and 2014. The 45 sampling points covered rivers, streams and reservoirs in five river basins belonging to three ecoregions. The species were listed according to drainage divide, and endemism was determined for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical Region; Endemism; Conservation; Fishes of the Caatinga. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000400304 |
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| Oliveira-Silva,Leonardo; Ramos,Telton Pedro Anselmo; Carvalho-Rocha,Yuri Gomes Ponce; Viana,Katherine Morais Porto; Avellar,Raizze da Costa; Ramos,Robson Tamar da Costa. |
| Abstract: The Mamanguape River Basin is located in a peripheral semi-arid area of South America, with its headwaters and middle reaches running through the Caatinga (from wetter to drier) and its lower reaches through the Atlantic Forest. The objective of this study was to inventory the fish fauna of the Mamanguape river basin through a comprehensive sampling and to discuss its ichthyofaunal dominance pattern. Sampling was conducted between 2015 and 2016 at 38 points throughout. The main river course was sampled at 18 fixed points during two expeditions (dry and wet seasons) using traw nets, cast nets, and dip nets, with a standardized effort. The tributaries were sampled during the dry season at 20 points using an adaptaptation of the AquaRAP methodology.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical Region; Brazilian Semiarid; Freshwater Fish; Species List; Dominance; Endemism. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000300204 |
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| Amaral,Silvana Vargas do; Hack,Ilana Rossi; Iturralde,Giuly Gouvêa; Leal-Zanchet,Ana Maria. |
| Land flatworms show high endemism due to their restricted mobility. In southern Brazil, land flatworm communities have been found mainly in areas of ombrophilous forests. Thus, this study documents land planarian species composition in remnants of deciduous seasonal forest in the northeast region of southern Brazil. Direct, diurnal samplings reveal the occurrence of 26 species of land flatworms, of which one belongs to the subfamily Rhynchodeminae and the others to the subfamily Geoplaninae. The Rhynchodeminae genus Rhynchodemus Leidy 1851 and the following Geoplaninae genera occurred: CephaloflexaCarbayo & Leal-Zanchet, 2003, Choeradoplana Graff, 1896, Imbira Carbayo et al., 2013, IssocaFroehlich, 1955, LuteostriataCarbayo, 2010, Obama Carbayo et al.,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity inventory; Planarians; Community composition; Neotropical Region. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000100203 |
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| Zilli,Florencia; Marchese,Mercedes; Paggi,Analía. |
| The larvae of Chironomidae are very important due to their density and role in aquatic food webs. Goeldichironomus holoprasinus Goeldi is one of the most abundant species of Chironomidae in man-made and natural systems, being widely used in water quality assessments. Because of its tolerance to stressing environmental factors, many studies have investigated the effects of stressors on G. holoprasinus anatomy and bionomic attributes. The main aim of this work was to describe G. holoprasinus life cycle attributes in laboratory conditions. The cephalic capsule growth among instars was 1.64 in average (Dyar proportion), whereas the total size growth was continuous. The average room temperature registered was 26ºC (18-33ºC). In this conditions the D value (time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical Region; Argentina; Stage. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000400005 |
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| Moure,Jesus Santiago. |
| Lissopedia, a new genus is proposed for Tetrapedia globulosa Friese, 1899, from Brazil and to include Tetrapedia flavopicta Cockerell, described from Yucatan, México. Three new species: Lissopedia ochronota from Albany, Jamaica, Lissopedia xanthina from Carmen (on the River Madre de Dios), Pando, Bolívia, and Lissopedia tristriata from Manaus, Amazonas, Brazil are described. The female of Lissopedia globulosa is described from Barreiras, Bahia, Brazil and thus a locality is given for this species. This genus seems to be confined to the Neotropical Region. Exomalopsini, Tapinotaspidini and Paratetrapediini are considered as tribes of Exomalopsinae. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lissopedia; Anthophoridae; Apoidea; Systematics; Neotropical Region. |
| Ano: 1992 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751992000200018 |
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| Araújo,Maíra Xavier; Aragão,Marcos; Cordeiro,Danilo; Bravo,Freddy; Carvalho,Claudio José Barros de; Andena,Sergio R.. |
| ABSTRACT A new species of Trichomyia from the state of Bahia, Brazil, is described and illustrated, and male and female are associated using DNA barcoding. Additionally, fragments of the COI of two other species, Trichomyia cerdosa Araújo & Bravo, 2016 and Trichomyia ituberensis Araújo & Bravo, 2016, and the females of two unidentified species, are sequenced. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA-barcoding; COI; Neotropical Region; Psychodid; Trichomyiinae. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000400283 |
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| Vivallo,Felipe. |
| ABSTRACT Nests of the oil-collecting bee Epicharis (Hoplepicharis) fasciata Lepeletier & Serville, 1828 were studied at the Jardim Botânico of Rio de Janeiro, Brazil. The females constructed their nests in an area of 609 m2 of mostly sandy flat soil. The nest architecture was relatively simple, with a main tunnel of approximately 30 cm in depth with one or two lateral tunnels ending in a single brood cell. Adult activity lasted approximately 45 days. The females dug the tunnels, constructed the brood cells, collected provisions and laid the eggs in approximately two days. Diapause occurred in the post defecating larval stage, and there was no cocoon. Nest architecture and the morphology of the brood cells are described and illustrated. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthophila; Bionomy; Neotropical Region; Nesting architecture; Solitary bee. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100225 |
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| Registros recuperados: 137 | |
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