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| Registros recuperados: 1.132 | |
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| Abba,Agustín M.; Cassini,Guillermo H.; Galliari,Fernando C.. |
| En este trabajo se presentan nuevos aportes sobre la historia natural de la mulita pampeana Dasypus hybridus (Desmarest, 1804) (Mammalia, Xenarthra, Dasypodidae). Los estudios de campo fueron llevados a cabo en 100 ha de cuatro establecimientos agropecuarios de la provincia de Buenos Aires, Argentina. Durante tres años se realizó un muestreo estacional de armadillos por captura y liberación. Se obtuvieron datos de hábitos alimentarios, uso del espacio y del tiempo, comportamiento, termorregulación, datos poblacionales y morfológicos. Se realizaron 71 capturas. En la dieta el ítem principal registrado fue material vegetal, seguido por hormigas e insectos coleópteros; no se observó una diferencia estacional en los hábitos alimentarios. La actividad de las... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Armadillos; Argentina; Cingulata; Conservación; Ecología. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300007 |
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| Abreu,Cássia I. V. de; Shimbori,Eduardo M.; D. Filho,Manoel M.; Penteado-Dias,Angélica M.. |
| Aleiodes Wesmael is the most diverse rogadine genus, with koinobiont endoparasitic development in Lepidoptera caterpillars resulting in mummification of the host remains. Aleiodes japi sp. nov. is described and illustrated. Type specimens of the new species were reared from Physocleora grosica and Ischnopteris sp. (Lepidoptera, Geometridae, Ennominae) larvae. Host larvae were collected on Alchornea triplinervia (Euphorbiaceae) at the Reserva Biológica Municipal da Serra do Japi, Jundiaí, São Paulo, Brazil. This is the second species of circumscriptus/gastritror group described from Brazil. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Biodiversity; Geometridae; Parasitoids; Host. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000100015 |
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| Achinelly,María Fernanda; Camino,Nora Beatriz. |
| A new species, Hexamermis paranaense n. sp. (Nematoda, Mermithidae), a parasite of larvae of Diloboderus abderus Sturm, 1826 (Coleoptera, Scarabaeidae) is described and illustrated. This new species is characterized by amphids small, amphidial opening pocket-shaped, the anterior portion of the vagina muscularized and slightly protruding with a descending branch forming a loop before joining the uterus, and three rows of genital papillae: the ventrolateral divided in two rows with eight papillae in the outer row and with six papillae in the inner one; the ventral row with four pairs and one single preanal papillae, and with two pairs, a triplete, one pair, a single and one pair postanal papillae. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hexamermis paranaense n. sp.; Nematoda; Mermithidae; Parasite; Scarabaeidae; Argentina. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000400007 |
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| Acuña,Francisco; Sidorkewicj,Nora S.; Popp,Albertina I.; Casanave,Emma B.. |
| ABSTRACT Sexual differences in some of the components of the pectoral girdle and forelimb of Chaetophractus villosus (Desmarest, 1804) were investigated by means of geometric morphometrics. A total of 15 scapulae (7 males, 8 females) and 50 humeri-ulnae complexes (24 males, 26 females) were examined. No size differences were detected between sexes for any of the bones, but shape differences were found for the humerus and the ulna that enhance the in-forces or the related in-levers. Females had a more robust humerus, with an enlarged deltoid tuberosity, a more spherical head, higher tubercular and epicondylar widths, and more developed supracondylar crests. The ulna of the females was characterised by a more pronounced curvature along its main axis, a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Large hairy armadillo; Fossorial mammals; Shape-based dimorphism; Appendicular skeleton. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100210 |
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| Agostinho,Carlos S.; Marques,Elineide E.; Oliveira,Rafael J. de; Braz,Pollyanna S.. |
| The diet and feeding habits of armado catfish, Pterodoras granulosus (Valenciennes, 1821), were studied in the Lajeado Reservoir, Tocantins, Brazil, and the mouth of its tributaries. Stomach contents of 327 specimens were analyzed by the percentage composition and volumetric methods. The feeding of armado on a wide variety of foods, including both animal and plant items, leads to its classification as a euriphagic species with herbivorous tendency. However, it should be noted that armado showed a strong ontogenetic diet shift, with the gradual replacement of detritus and sediment by plant items, especially terrestrial ones. The environmental use pattern of P. granulosus corroborates the ontogenetic shift observed in its diet. Small fish predominated mainly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding habits; Seasonal shift; Ontogenetic shift; Habitat use. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000300012 |
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| Alcantara,Mariana B.; Lima,Leôncio P.; Bastos,Rogério P.. |
| From January, 1997 to April, 1998, we studied breeding activity in a population of Scinax centralis Pombal & Bastos, 1996, in the state of Goiás, inside the Cerrado Biome, Brazil. The behavior of males and females in the choruses, the relationships between environmental variables and the presence of individuals, the spatial distribution pattern, amplexus and clutches were analyzed. The breeding season occurred from November to May. The majority of males began to call when they entered the chorus; they were defending their calling sites against other males. We found a positive correlation between the number of females and males in the choruses, but no significant correlation was observed between the operational sexual ratio (OSR, number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scinax centralis; Spatial distribution; Breeding; Aggressive behavior; Central Brazil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400008 |
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| Almeida-Gomes,Mauricio; Hatano,Fábio H.; Van Sluys,Monique; Rocha,Carlos F. D.. |
| We analyzed the diet and microhabitat use for two Hylodinae anurans (Cycloramphidae), Hylodes phyllodes Heyer & Cocroft, 1986 and Crossodactylus gaudichaudii Duméril & Bibron, 1841, living in sympatry at an Atlantic Rainforest area of Ilha Grande, in southeastern Brazil. The two species live syntopically at some rocky streams. The two species differed strongly in microhabitat use. Hylodes phyllodes occurred mainly on rocks, whereas C. gaudichaudii was observed mostly on the water. Regarding diet, coleopterans, hymenopterans (ants), and larvae were the most important prey item consumed by both species. Data suggest that microhabitat use appears to be an important parameter differentiating these frogs with respect to general resource... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anuran; Sympatry; Syntopy; Atlantic Rainforest; Ilha Grande. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000100005 |
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| Almeida,Luciane M. de; Carareto,Claudia M. A.. |
| The occurrence of hybrid dysgenesis was investigated in Drosophila sturtevanti Duda, 1927 using diagnostic crosses similar to those used for induction of dysgenics traits in D. melanogaster. Reciprocal test crosses were made, at 27° C, between an old laboratory strain of D. sturtevanti (COL, from Colombia), assumed to be an M'-like strain, and eight freshly collected strains from several natural populations. The gonadal dysgenesis indices were under 10% in most of crosses, except in hybrids of COL with I27, a strain from Minas Gerais (Brazil), in which the index values were moderate in both directions of crosses (25.71 and 12.87). The smallest productivity was also observed in hybrids of females COL mated to I27 males. No causal relationship between the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hybrid sterility; P element; I element; Hobo element; Transposable elements. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212002000200007 |
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| Almeida,Paulo R. C.; Monteiro-Neto,Cassiano; Tubino,Rafael A.; Costa,Marcus R.. |
| RESUMO Os otólitos são estruturas espécie-específicas de peixes cuja análise morfológica é uma ferramenta eficiente para identificação e discriminação de estoques e/ou populações sujeitas a variações clinais. O presente trabalho buscou elucidar o grau de variação morfológica dos otólitos sagitta do dourado, Coryphaena hippurus Linnaeus, 1758 capturado ao largo da costa sudeste do Brasil pela frota pesqueira sediada no Rio de Janeiro. Os 164 pares de otólitos analisados foram obtidos a partir de amostras coletadas entre fevereiro de 2014 e outubro de 2016. A forma e o contorno dos otólitos sagitta foram caracterizados através de seis descritores (área, perímetro, circularidade, retangularidade, excentricidade e dimensão fractal) e análises de Fourier... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morfometria geométrica; Forma do otólito; Análise de Fourier elíptica; Análise multivariada. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100218 |
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| Almeida,Viviane L. dos S.; Larrazábal,Maria Eduarda L. de; Moura,Ariadne do N.; Melo Júnior,Mauro de. |
| Os rotíferos do reservatório de Tapacurá, Pernambuco, Brasil foram estudados quanto à distribuição horizontal nas zonas limnética e litorânea, nos períodos chuvoso (agosto de 2003) e seco (janeiro de 2004). Amostras quali-quantitativas foram obtidas através de coletas em ritmo nictimeral nas distintas zonas do reservatório, com intervalo de seis horas, em duas profundidades. Os parâmetros bióticos riqueza, densidade, diversidade e equitabilidade foram avaliados. Análises de similaridade e variância (ANOVA) também foram utilizadas. Vinte e oito espécies e duas subespécies de Rotifera foram encontradas, das quais cinco espécies são novas ocorrências para Pernambuco. A zona litorânea apresentou maior riqueza que a limnética em ambos ao período sazonais, com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Limnologia biótica; Distribuição horizontal; Rotifera; Biodiversidade; Macrófitas. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000400009 |
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| Almerão,Maurício P.; Mendonça Jr.,Milton de S.; Quadros,Aline F.; Pedó,Ezequiel; Silva,Luiz G. R.; Araujo,Paula Beatriz. |
| We analysed species abundance and composition during one year of sampling at Itapuã State Park, a conservation unit in the State of Rio Grande do Sul, southern Brazil. Samples were collected monthly from May 2003 to April 2004 along a 4 km forest trail divided in three transects along the slopes of a small hill. Terrestrial isopods were hand searched by three people for 40 minutes at two sampling sites along each transect, summing 240 minutes of sampling effort per transect per month. Six species distributed in six families were found. The collector curve stabilised when half the samples were taken, demonstrating sampling sufficiency: analytical estimates did not predict more species to be found in the trail. Atlantoscia floridana (van Name, 1940) was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Terrestrial isopods; Oniscidea; Crustacea; Soil fauna. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000400012 |
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| Alves,Maria Lúcia Machado; Leitão-de-Araujo,Moema; Witt,André Alberto. |
| The reproduction of Bothrops jararaca (Wied, 1824) in captivity in ordened to determine the intercourse period, births, number of neonates, proportion of males and females per litter were performed between 1989 and 1999. Fifty eight females were observed, 16 intercourses in captivity, 45 females arrived already fertilized from nature and 53 litters, resulting on the birth of 426 live neonates, 67 infertile egg masses, 18 stillborn neonates and 4 abnormal neonates. The intercourse period was from february to december and the births happened between february and may. From the two gestacional periods observed, the shortest one was 152 days and the longest 239. The average amount of live neonates per litter was 8,04. Among 323 neonates, 47,68% were males and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bothrops jararaca; Reproductive cycle; Neonates; Development; Captivity. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212000000200009 |
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| Alves,Roberto da Gama; Marchese,Mercedes Rosa; Escarpinati,Suzana Cunha. |
| Despite the importance of Oligochaeta to the dynamics of aquatic ecosystems and to studies of the biology of pollution, there is currently a dearth of information on this group's ecology in Brazil. The aim of this study was to describe the Oligochaeta fauna in four watercourses - three urban and one rural - in the state of São Paulo: the Pinheirinho stream, the Água Branca stream, the Monjolinho River and the Gouveia stream, respectively. Sediment samples were taken with a Van Veen grab in two areas from each watercourse, during the summer and winter of 2001. In all collection areas, measurements of the pH, electrical conductivity, dissolved oxygen and turbidity of the water were made with a Horiba U-10 device. Principal component analysis showed that axes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tubificidae; Naididae; Alluroididae; Narapidae; Enchytraeidae. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000400007 |
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| Registros recuperados: 1.132 | |
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