Spiders
Mostrando 25-36 de 146 artigos, teses e dissertações.
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25. Epidemiology of envenomations by terrestrial venomous animals in Brazil based on case reporting: from obvious facts to contingencies
Abstract Background: Envenomation remains a neglected public health issue in most tropical countries. A better understanding of the epidemiology of bites and stings by venomous animals should facilitate their prevention and management. This study aimed to explore the benefits that could be derived from the compulsory notif
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 11/08/2015
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26. Natural history of Micrablepharus maximiliani (Squamata: Gymnophthalmidae) in a Cerrado region of northeastern Brazil
Micrablepharus maximiliani (Reinhardt & Luetken, 1861) is a microteiid lizard widely distributed in the open areas of South America. Little is known about its ecology and reproductive biology. Here, we analyzed aspects of the natural history of a population of M. maximiliani from a Cerrado area in the state of Piauí, northeastern Brazil. Our results suggest
Zoologia (Curitiba). Publicado em: 2014-04
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27. Editorial
Information is presented on morphological variation in the frog, Phyllomedusa ecuatoriana, with a description ot the tadpole, vocalizations, and notes on its natural history and distribution, based on material recently collected in the Cordillera del Cóndor, Zamora Chinchipe Province, Ecuador. Phyllomedusa ecuatoriana is of médium size (male SVL length 46.
Pap. Avulsos Zool. (São Paulo). Publicado em: 2014
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28. Effect of the insecticide Lambda-cyhalothrin on rice spider populations in southern Brazil
The adverse effect that insecticides have on spider populations is of major concern since these predators are a component in the biological control of rice insect pest populations. This study was designed to determine the effect of the pyrethroid insecticide, Lambda-cyhalothrin, on spider populations in rice fields. Treatments consisted of plots treated once
Zoologia (Curitiba). Publicado em: 13/12/2013
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29. The diet of the black widow spider Latrodectus mirabilis (Theridiidae) in two cereal crops of central Argentina
The spider Latrodectus mirabilis (Holmberg, 1876) is commonly found in cereals crops of central Argentina. We studied its diet composition at the field and capture rate on leaf-cutting ants based on laboratory experiments. This study comprises the first approach that documents the diet of L. mirabilis in wheat and oat fields of central Argentina. We identifi
Iheringia, Sér. Zool.. Publicado em: 2013-12
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30. Morphology, evolution and usage of urticating setae by tarantulas (Araneae: Theraphosidae)
Urticating setae are exclusive to New World tarantulas and are found in approximately 90% of the New World species. Six morphological types have been proposed and, in several species, two morphological types can be found in the same individual. In the past few years, there has been growing concern to learn more about urticating setae, but many questions stil
Zoologia (Curitiba). Publicado em: 2013-08
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31. A new species and new records of linyphiid spiders (Araneae: Linyphiidae) from Amazonas, Brazil
Linyphiidae is currently the second richest family of spiders in the order Araneae but is poorly known and studied in Brazil, particularly in the northern states. In this contribution we describe a new species of Exechopsis Millidge, 1991 from the State of Amazonas, based on both males and females. The male of Meionetaadami Millidge, 1991 is described for th
Zoologia (Curitiba). Publicado em: 2013-06
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32. Análise do papel do sistema complemento na injúria a células renais causada pelo veneno da aranha Loxosceles. / Analysis of the complement system in the injury of kidney cells caused by Loxosceles spider venom.
O envenenamento por aranhas Loxosceles pode resultar dois tipos de manifestações clínicas: o loxoscelismo cutâneo e o sistêmico. Hemólise, agregação plaquetária, inflamação persistente, falência renal e morte podem ser observados em pacientes com manifestações sistêmicas. Apesar da pouca incidência de vítimas com falência renal, esta é a p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/04/2012
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33. Padrões bioenergéticos das aranhas de teia: considerações sobre a unidade e a diversidade do fenômeno / Patterns of bioenergetic of web spiders: considerations about the unity and diversity of the phenomenon
The physiological mechanisms are often applied to explain important evolutionary adaptations (e.g. endothermy) and ecology (e.g. physiological limitations to occupy a particular microhabitat) of vertebrates. Despite the fact that it improves vertebrates ecological and evolutionary hypotheses with possible processes and mechanisms, it is scarcely used to unde
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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34. Documented bites by a yellow sac spider (Cheiracanthium punctorium) in Italy: a case report
In Italy reports of human envenomations by yellow sac spiders have been sporadic. Since increasing clinical information would improve understanding of the danger of yellow sac spiders to humans, we report the case of a 7-year-old child and her father bitten by a documented Cheiracanthium punctorium. They developed acute persistent pain with local skin signs
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 2012
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35. Estudo do mecanismo de ereção peniana causada pela toxina TX2-6 produzida pela aranha Phoneutria nigriventer. / Study of penile erection mechanism caused by Tx2-6 toxin produced by Phoneutria nigriventer spider.
O veneno produzido pela aranha Phoneutria nigriventer causa priapismo. O pré-tratamento de camundongos com inibidores da Óxido nítrico-sintase, antes de se injetar a toxina, inibe este priapismo. A toxina causa ativação do gene c-fos no núcleo paraventricular do hipotálamo (NPV). Este estudo tem como objetivo ampliar os conhecimentos relacionados ao m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/06/2011
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36. Wolbachia screening in spiders and assessment of horizontal transmission between predator and prey
Recent studies have revealed that the prevalence of Wolbachia in arthropods is attributable not only to its vertical transmission, but also to its horizontal transfer. In order to assess the horizontal transmission of Wolbachia between predator and prey, arthropods belonging to 11 spider families and six insect families were collected in the same field of ri
Neotropical Entomology. Publicado em: 2011-04