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| Registros recuperados: 884 | |
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| Andriolo,Artur; Zerbini,Alexandre N.; Moreira,Sergio; Pizzorno,José L.; Danilewicz,Daniel; Maia,Ygor G.; Mamede,Natália; Castro,Franciele R. de; Clapham,Phillip. |
| The social structure of humpback whales in their tropical wintering grounds is very fluid. To date, no information has been published for cases in which two whales were both satellite-tagged while in association. Here, we report the movements of four humpback whale pairs tagged together off the coast of Brazil. Fieldwork and satellite tagging of humpback whales was conducted between 2003 and 2008 along the eastern coast of Brazil, between 20°S and 8°S. Movement was monitored while whales were still in their breeding ground. A switching state space model was applied to the filtered data of each humpback whale to standardize telemetry data and allow direct comparison of each individual track. GIS was used to plot model-predicted locations and to visually... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cetacean; Large whale; Satellite telemetry; Social behavior; SSSM. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000200001 |
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| Pedroso,Denis Rafael; Baptista,Renner Luiz Cerqueira; Bertani,Rogério. |
| A new species of Masteria L. Koch, 1873 from iron ore caves at Caeté and Santa Bárbara, state of Minas Gerais, Brazil, Masteria emboaba sp. nov., is described. It was collected inside caves and in the litter of nearby dry forests. It is the first masteriine species described from southeastern Brazil and the second masteriine species for the country. The new species is the only known Masteria with only two eyes. Additionally, the male of M. emboaba sp. nov. has only two regular, thin spines at the apex of tibia I, lacking the tibial apophysis found in most other Masteria species. The only other described Masteria species that has spines in the place of tibial apophysis is M. aimeae (Alayón, 1995) from Cuba; however, the last species has a longer and sinuous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Iron ore; Lateritic cave; Minas Gerais; Mygalomorphae; Serra da Gandarela. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000100059 |
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| Carlos,Caio J.; Voisin,Jean-François. |
| The type locality of the South American Tern, Sterna hirundinacea, has long been considered to be the state of Santa Catarina in South Brazil. This conclusion was probably based on two syntypes, from the Muséum national d'Histoire naturelle in Paris, France, one from Laguna and the other from an unspecified locality. The latter was probably shot on the coast of Rio de Janeiro. A recent molecular study has shown that Brazilian and Patagonian populations of S. hirundinacea are not completely panmictic, though genetic differentiation between them is low. No data from the Falkland Islands and Pacific coast populations have been available for comparison. If future analysis shows that Pacific and/or Falkland/Malvinas populations are genetically isolated from the... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Brazil; Nomenclature; Seabirds; Taxonomy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000300017 |
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| Lopes,Sonia Maria; Oliveira,Edivar Heeren de; Tarli,Vitor Dias. |
| We describe three new species collected from the Reserva Ducke (02°55'-03°01'S, 59°53'-59°59'W), near Manaus, state of Amazonas: one new species was included in Blaberidae (Epilamprinae): Epilampra manauara sp. nov: , which is similar to E. sagitta Rocha e Silva & Aguiar, 1978. It differs from that species in the generally darker coloration and the internal genitalia, which has the right phallomere hooked, developed, wide medially and distended apically, bearing an apical spine-like structure and a median sclerite with a larger prepucium, rounded and with apex more sclerotized and with better-defined apical crests. Two new species were included in Ectobiidae (Blattellinae): Chromatonotus amazoninus sp. nov: , which is similar to Chromatonotus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blattellinae; Epilamprinae; Litter; Taxonomy. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000200008 |
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| Perbiche-Neves,Gilmar; Previattelli,Daniel; Nogueira,Marcos Gomes. |
| The first record of Argyrodiaptomus bergi (Richard, 1897) from a small roadside pool at high altitude in the southern region of Brazil is presented. This is the ninth record of this species in South America (previously known from Argentina and Uruguay) since its original description, and a new occurrence after 36 years, extending its known distribution to the northeast. The environments where this species was found differ sharply, and possible explanations include the loss of habitat, high species selectivity or deficient sampling efforts. An additional description is provided, with scanning electron microscopy (SEM) photomicrographs and line drawings. Similarly to other species of Argyrodiaptomus, such as Argyrodiaptomus falcifer (Daday, 1905),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: New record; Rare species; Santa Catarina. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500001 |
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| Araújo,Francisco G.; Nascimento,Aparecida A.; Gomes,Iracema D.; Sales,Armando; Oliveira,Beatriz A. Chagas de. |
| ABSTRACT The gonadal development of the characin Astyanax aff. bimaculatus from Funil Reservoir, an impoundment in the middle reaches of the Paraiba do Sul River in southeastern Brazil was analysed through histological, histochemical and histometric techniques, and the spawning season was determined. Unbalanced sex ratio was found, with females outnumbering and reaching larger sizes than males. The following stages of oogenic cell development were identified for females: primary growth, pre-vitellogenic (cortical alveolar) and vitellogenic. In males, the following stages were determined: spermatogonia primary and secondary, spermatocyte primary and secondary, spermatid and spermatozoa. The spawning occurs most of the year, peaking in January-February, as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Freshwater fish; Histology; Oocyte; Spawning type; Spermatocyte. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100326 |
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| Zhong,Yihai; Li,Zejian; Wei,Meicai. |
| ABSTRACT The flavipes group of Pachyprotasis Hartig, 1837, with twenty-four species recognized in China, is reviewed. This number includes two newly described species, Pachyprotasis rufodorsata sp. nov., from Sichuan, Hubei, Ningxia, and Shaanxi provinces, and Pachyprotasis nigritarsalia sp. nov., from Hunan province. The mesopleuron and metapleuron of the two new species are reddish-brown, distinguishing them from other similar species of the P. flavipes group. Thirty-four species of this group have been recorded from China, one species (P. variegate Fallén, 1808) was found to be widespread throughout Europe and Siberia, twenty-four were originally described from the China and Burma-Yunnan frontier, eleven from India, and five from Japan. A key to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sawflies; Taxonomy; Tenthredininae; Tenthredinoidea. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702021000100308 |
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| Sousa,Viviane Rodrigues de; Couri,Márcia Souto. |
| ABSTRACT Phytobia Lioy, 1864 flies occur in all continents. There are four recorded species of these flies in Brazil, but recent expeditions at unexplored areas in the country have revealed that the genus is far more diverse than previously known. Based on material collected in the states of Mato Grosso, Mato Grosso do Sul, and Rondônia (as part of the SISBIOTA Diptera Project), we describe fourteen new species of Phytobia. Additionally, we redescribe P. kallima (Frost), previously recorded only from Panama, and provide a key to the 32 resulting Neotropical species. All descriptions include details and illustrations of the male and female terminalia. The speciemens are deposited in the collections of Museu de Zoologia, Universidade de São Paulo (São Paulo,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian species; Leaf-mining flies; Morphology; Taxonomy; Tropical forest. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100334 |
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| Enout,Alexandre M. J.; Lobato,Débora N.; Azevedo,Cristiano S. de; Antonini,Yasmine. |
| The rates of infestation by chewing lice and feather mites on Turdus leucomelas Vieillot, 1818 (Aves: Turdidae) were used to test the hypothesis of that parasitism either increases or decreases according to, reproductive and molting seasons, respectively. Samples were obtained at the State Park of Rio Preto, state of Minas Gerais, Brazil, in October and December of 2006 and in March of 2007. The dust-ruffling technique was used in to remove the parasites from the body of their hosts. Five species of chewing-lice were found on the birds, with Myrsidea sp. and Brueelia sp. being the most prevalent parasites, whereas Menacanthus eurysternus Burmeister, 1838 was the least prevalent. No statistically significant difference was found between the infestation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chewing lice; Feather mites; Feather molt; Pyrethrin. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300017 |
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| Mageski,Marcio; Ferreira,Rodrigo B.; Jesus,Paulo R.; Costa,Larissa C. da; Roper,James J.; Ferreira,Paulo D.. |
| ABSTRACT The island rule suggests that, when mainland animals are isolated on islands, large animals tend to become smaller, while small animals tend to become larger. A small frog in eastern Brazil, Phyllodytes luteolus (Wied-Neuwied, 1824), is widely distributed in association with bromeliads. At the end of the last glaciation, parts of the mainland became islands due to rising sea levels, thereby isolating frog populations on these islands. If the island rule holds, we predicted that frogs on islands would tend to be larger than frogs on the mainland. We compared sizes (weight and length) of 30 randomly selected male frogs from the mainland with 30 from an island in the state of Espírito Santo, Brazil. We also sampled population density on the island... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliad; Amphibian; Anuran; Bromeligenous. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000500329 |
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| Diniz,Pedro. |
| Sexual dimorphism in birds is often attributed to sexual selection, but another interpretation suggests the evolution of this phenomenon by natural selection. Predation may be an important selective pressure, acting mainly on females. In this study, I tested the latter hypothesis on the coal-crested finch (Charitospiza eucosma Oberholser, 1905) in a neotropical savanna of the Central Brazil (Cerrado). I used capture methods for ascertaining the sex ratio in the population, and focal observations to gather behavioral data. My results show that the sex ratio is skewed toward males (1:1.39). Males were more vigilant, vocalized for longer periods of time, and used higher perches than females. Females foraged more, spent more time on parental care and remained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Foraging behavior; Predation risk; Sex ratio; Sexual dimorphism. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000200003 |
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| Furuya,Valéria R.B.; Michelato,Mariana; Cruz,Thais P. da; Furuya,Wilson M.. |
| This study ascertains the length-weight relationship and predicts body composition equations in cultivated Astyanax aff. fasciatus. A total of 300 fish were distributed in five groups according to body weight: 1.19 ± 0.18, 3.7 ± 0.70, 7.55 ± 0.97, 12.28 ± 2.32 and 22.16 ± 2.64 g. The length-weight relationship was elaborated using linear (y i = b0 + b1x i) or second-order (y i = b0 + b1x i + b1x i²) regression analysis. The value of the b slope in the length-weight relationship was 3.6971 and the intercept was 0.0031. The prediction equations obtained for body moisture, crude protein, crude lipid and ash were, y = 71.680 - 0.404BW, y = 17.140 - 0.095BW, y = 8.432 +0.364BW and y = 3.720 - 0.032BW, respectively, where BW is the body weight of fish (g). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Fish; Growth; Mathematical modeling; Regression analysis. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000600001 |
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| Levi,Herbert W.; Santos,Adalberto J.. |
| In this study, 10 nominal species of Eustala Simon, 1895 are synonymized with other species of the genus, mostly based on matching males and females erroneously described as different species. Parawixia rimosa (Keyserling, 1892) is considered a senior synonym of Eustala decemtuberculata Caporiacco, 1955. Eustala isosceles Mello-Leitão, 1939 is transferred to Kapogea Levi, 1997 and considered a senior synonym of Kapogea alayoi (Archer, 1958) based on abdomen shape and coloration. Micrathena beta Caporiacco, 1947 is redescribed, illustrated and transferred from Linyphiidae back to Araneidae. This species can be easily distinguished from other members of the genus by the male palpus with an enlarged and modified paracymbium and a narrower hook as a conductor.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kapogea; Neotropical region; Parawixia; Taxonomy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200013 |
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| Perbiche-Neves,Gilmar; Boxshall,Geoff A.; Rocha,Carlos E. F. da; Nogueira,Marcos G.. |
| The freshwater copepod Odontodiaptomus thomseni (Brehm, 1933) (Calanoida: Diaptomidae) is a rare species that has been reported only once - in its original description (BREHM 1933). The lack of subsequent records led to its inclusion in the Red List of threatened species (IUCN). Here we present a new record for O.thomseni. It was discovered in Salto Grande reservoir, which is located in the lower stretches of the Uruguay River, between Uruguay and Argentina, at the River Plate basin. In January 2010, three specimens (two males and one female) were found, and these were studied in detail using scanning electron microscopy (SEM). We only had material of Odontodiaptomus paulistanus (Wright, 1936) for comparison, but the position of the lateral spine in right... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copepod; Rare; Red list; Taxonomy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000200010 |
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| Registros recuperados: 884 | |
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