Arachnids
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Soil Biological, Chemical, and Physical Properties After a Wildfire Event in a Eucalyptus Forest in the Pampa Biome
ABSTRACT Wildfire events cause considerable environmental disturbance but few studies have examined changes in soil properties due to fire. This study aimed to assess the effect of a wildfire event on chemical, physical, and biological properties of the soil in a eucalyptus forest in the Pampa biome. Part of a seven-year-old eucalyptus forest was affected by
Rev. Bras. Ciênc. Solo. Publicado em: 23/07/2018
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2. Effects of season, sex and age on the diet of Homonota fasciata (Squamata, Phyllodactylidae) from Monte region of Argentina
Abstract This study aimed to investigate the diet of the gecko Homonota fasciata (Duméril & Bibron, 1836) in a population from Monte of San Juan Province, Argentina, and to analyze possible temporal, sexual, and ontogenetic variations in feeding behavior. We determined the total volume, number, and occurrence frequency of each prey item and calculated the r
Iheringia, Sér. Zool.. Publicado em: 01/08/2016
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3. Arachnids of medical importance in Brazil: main active compounds present in scorpion and spider venoms and tick saliva
Arachnida is the largest class among the arthropods, constituting over 60,000 described species (spiders, mites, ticks, scorpions, palpigrades, pseudoscorpions, solpugids and harvestmen). Many accidents are caused by arachnids, especially spiders and scorpions, while some diseases can be transmitted by mites and ticks. These animals are widely dispersed in u
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 29/09/2015
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4. Fish diet composition in permanent and semi-permanent pools in tropical wetlands of the Yucatan Peninsula
We compared fish diet composition between permanent (P) and semi-permanent (SP) pools in Petenes Biosphere Reserve (PBR), Campeche. A total of 445 gut contents were examined to determine stomach relative fullness (RF), fish diet as index of niche breadth (INB) and diet overlap. In SP pools, species showed a RF of 1.66 (57.20 % empty stomachs) whereas in P po
Neotrop. ichthyol.. Publicado em: 2013
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5. Revisão e análise cladística do gênero Plesiopelma Pocock, 1901 (Araneae, Theraphosidae). / Revision and cladistic analysis of the genus Plesiopelma pocock, 1901 (Araneae, Theraphosidae).
O gênero Plesiopelma Pocock, 1901 é revisado taxonomicamente e realizada análise cladística de suas espécies. A matriz com 30 táxons terminais e 49 caracteres foi analisada com dois programas para reconstrução filogenética, considerando tanto caracteres aditivos como não-aditivos. As quatro análises apresentaram diferenças na topologia, porém tr
Publicado em: 2010
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6. Peptídeos antimicrobianos: síntese, ensaios biológicos, estudos termodinâmicos e análise estrutural por RMN em meios biomiméticos
Many organisms employ noxious chemicals (e.g., amines, steroid derivatives, alkaloids and peptides) to defend themselves against predators and pathogenic microrganisms. Among these chemical agents stand out peptides that can be found in a wide variety of organisms including bacteria, fungi, plants, insects, fish, amphibians,arachnids and mammals. The vast ma
Publicado em: 2010
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7. Mecanismos de ação de metaloproteases endógenas na injúria de queratinócitos humanos induzida pelo veneno de Loxosceles laeta e a SMase I. / Action mechanisms of endogenous metalloproteinases in human keratinocytes injury induced by Loxosceles laeta spider venom and SMase I.
O envenenamento por aranhas Loxosceles é caracterizado pelo desenvolvimento de dermonecrose. A expressão de metaloproteases induzidas pelas esfingomielinases do veneno pode estar envolvida no loxoscelismo cutâneo. Os resultados mostraram que o veneno de Loxosceles laeta e a proteína recombinante SMase I foram capazes de: induzir a expressão de metalopro
Publicado em: 2009
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8. Reproductive biology of the harvestman Iporangaia pustulosa (Arachnida: Opiliones): sexual selection and evolution of paternal care / Biologia reprodutiva do opilião Iporangaia pustulosa (Arachnida: Opiliones) : seleção sexual e evolução do cuidado paternal
Exclusive paternal care is rare reproductive strategy that and has evolved only in the order Opiliones among arachnids. Although nearly half of the independent events of evolution of this behavior in arthropods has occurred in the order Opiliones, only a few studies have investigated in detail the reproductive biology of harvestmen species. Iporangaia pustul
Publicado em: 2008
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9. Diversidade de arachnida na ilha de Fernando de Noronha, com Ãnfase em araneae e scorpiones
A classe Arachnida possui mais de 70.000 espÃcies, predominantemente predadoras, e forma um grupo pouco estudado em muitas regiÃes do Brasil. Este projeto realizou o primeiro inventÃrio sistematizado da fauna de aracnÃdeos da ilha de Fernando de Noronha (3Â50 S; 32Â15 W), Ãrea considerada de extrema importÃncia para a preservaÃÃo da biodiversidade.
Publicado em: 2007
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10. Ecologia alimentar e reprodutiva de Marmosops paulensis (Didelphimorphia : Didelphidae) em uma area de Mata Atlantica no sudeste de São Paulo
Marmosops paulensis [Tate, 1931] (Didelphimorphia: Didelphidae) is a small marsupial occurring in montane forests above 800 m in the Brazilian Atlantic forest. The objective of the present study was to evaluate the influence of resource availability on the diet, space use and reproductive patterns of M. paulensis. This study was carried out from August 2002
Publicado em: 2005
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11. Tropical House Gecko (Hemidactylus mabouia) predation on brown spiders (Loxosceles intermedia)
Brown spiders (Loxosceles spp.) are venomous arachnids, successfully adapted to urban habitats in Brazil. Loxoscelism became a serious public health problem in Paraná State, especially at the capital Curitiba, where the most abundant species is Loxosceles intermedia. Hemidactylus mabouia (Gekkonidae) lizards are synanthropic predators of arthropods. In this
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2004
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12. Venezuelan arachnids: two new species of the Tityus genus (scorpionida: buthidae) and the chromatographic profile of venom as a possible taxonomical tool
Two new species of the Tityus genus are described. T. isabelceciliae n. sp lives on the northern central slope of the Cordillera de la Costa. It belongs to the discrepans group and is dangerous to man due to its high number, aggressive behavior, domiciliary habits, and high toxicity of its venom. T. isabelceciliae venom is similar to other Tityus in relation
Journal of Venomous Animals and Toxins. Publicado em: 2001-12