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Showing 1 to 20 of 29 for “"Araneae"”.
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Systematics of the Afrotropical Mystarini (Araneae : Thomisidae : Dietinae)
The Thomisidae is a large family represented by ca. 2085 species and 173 genera and has a worldwide distribution. The thomisids of the Afrotropical region are known from ca. 69 genera and 371 species grouped into seven subfamilies of which the subfamily Dietinae is the focus group in the present …
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O gênero Selenops Dufour in Latreille, 1819, no Brasil (Araneae - Selenopidae)
Study of Brazilian Species of genus Selenops Latreille, 1819, concerning taxonomy aspects. This work was based upen material found in the following Institutions: Museu Nacionalda Universidade Federal do Rio de Janeiro (MN) Museu de Zoologia da Universidade de São Paulo (MZUSP) Instituto Butantan …
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Contribuição ao estudo do genêro Tmarus Simon, 1875, no Brasil (Araneae, Thomisidae)
A study is made of the species of Tmarus Simon, 1875 occuring in Brazil from the point of view of systematics, analizing the data in the literature as well as the material in the collections of the following institutions: Museu Nacional, da Universidade Federal do Rio de Janeiro; Museu de Zoologia …
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Biología reproductiva de arañas migalomorfas (Araneae, Mygalomorphae) : patrones y mecanismos de selección sexual
Cuando Darwin postuló la teoría de Selección Sexual pudo explicar elaboradas características presentes normalmente en los machos que no podía predecir con la teoría de Selección Natural. Bajo esta teoría predijo que en general las hembras tenderán a ser el sexo selectivo y recurso escaso por el …
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Systematics and Evolution of the Californian Trapdoor Spider Genus Aptostichus Simon (Araneae: Mygalomorphae: Euctenizidae)
Chapter One: Raven's 1985 phylogenetic analysis of the Mygalomorphae placed a number of previously unrelated genera into the rastelloid family Cyrtaucheniidae. Although Goloboff's 1993 reanalysis of mygalomorph relationships retained the familial composition of the Rastelloidina it di not support …
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A study of disturbance behaviors in Uloborus glomosus (Araneae; Uloboridae) as possible predator avoidance strategies
When touched with a contact stimulus, 50% of adult Uloborus glomosus jumped from the web; 33% remained motionless; 13% moved to the edge of the web; and 4% shook the web. In a population of juveniles, 45% moved to the edge of the web; 27% jumped from the web; 24% shook the web; and 4% remained …
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Molecular Evidence Suggests Multiple Evolutionary Origins of Sociality in the Polyphenic Spider <em>Anelosimus studiosus</em> (Araneae: Theridiidae).
<p><em>Anelosimus studiosus</em> exhibits two behavioral phenotypes: subsocial and social. This is the only documented spider inhabiting a temperate climate exhibiting social behavior. While the subsocial phenotype is most common throughout the range, the social behavior occurs in isolated pockets …
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The effect of prey availability on metabolism and activity in the tarantula <i>phormictopus cancerides</i> (araneae: theraphosidae)
<p>This study examined the effect of different periods of food deprivation on resting metabolic rates (RMR) and foraging activities in tarantulas (<em>Phormictopus cancerides</em>). Juvenile tarantulas were separated into two feeding groups and fed once either every 5 or 30 days. Monthly feeding …
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Micro scale heterogeneity of spiders (Arachnida: Araneae) in the Soutpanberg, South Africa: a comparative survey and iventory in representative habitats
Coarse-scale studies that focus on species distributions and richness neglect heterogeneity that may be present at finer scales. Studies of arthropod assemblage structure at fine (1 x 1 km) scales are rare, but important, because these are the spatial level at which real world applications are …
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A phylogeny of the genus Gasteracantha Sundevall, 1833 (Araneae, Araneidae) with an examination of sexually dimorphic characters in the subfamily Gasteracanthinae
The Arachnida subfamily Gasteracanthinae, commonly known as thorn or kite spiders due to their prominent abdominal spines, is mainly Pan-Tropical in distribution. Little has been published about the relationships and classification of the genera and there is still considerable taxonomic confusion …
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Investigations into the digestive system proteases of Argiope aurantia (Araneae: Araneidae), hemolytic agents of spider venoms, and the role of both in necrotic arachnidism
<p>Necrotic arachnidism, or tissue necrosis following spider bites is a widespread problem. Knowledge of the exact mechanism that produces such lesions is still incomplete. Here I have examined spider digestive fluid proteases and spider venom enzymes (e.g., sphingomyelinase D and phospholipase A2) …
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Estudio preliminar de artrópodos edáficos bajo diferentes condiciones de manejo del suelo en el cantón Shaltipa de la cuenca del lago de Ilopango
… Acariformes (17.06%), Díptera (2.34%) y Araneae (1.43%) para las trampas de hoyo. Para el embudo Berlese, - los grupos evaluados fueron : Acariformes (44.86%), Formicidae (15.72%) y Coleóptera (12.13%). En tales taxa se midió distribución espacial, diversidad y similitud para los nueve …
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Effekte einer reduzierten Dosis von Pflanzenschutzmitteln auf tritrophische Systeme im Ackerbau
… Prädatoren positiv beeinflusst wurde. Die Araneae reagierten auf die reduzierte Dosis mit einer teilweise erhöhten Aktivitätsdichte und Artendiversität. Dagegen waren diesbezüglich keine eindeutigen Effekte auf die Carabidae festzustellen. Es traten keine strukturellen Veränderungen in Form …
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Effect of cutting as a fen management practice on the invertebrate biodiversity of the Norfolk Broads
… The invertebrates studied were Mollusca, Araneae and Coleoptera. Species level changes were investigated in order to identify any specific level responses to management. All the groups studied were shown to be habitat specific and sensitive to management at the species level, for some, but …
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Eight Legs And A Brain: Locomotor Mimicry Of Ants And Neuroethology Of Jumping Spiders
… and sensory neurobiology of jumping spiders (Araneae: Salticidae). The first section (Chapters 1 and 2) investigates antmimicry by the jumping spider Myrmarachne formicaria. The second section (Chapter 3) takes a neuroethological approach to sound perception in the jumping spider Phidippus …
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Plant diversity and its effects on populations of cucumber beetles and their natural enemies in a cucurbit agroecosystem
… (Order: Hymenoptera), and spiders (Order: Araneae) in a cucumber field and a bordering field of uncultivated vegetation were assessed using yellow sticky traps to determine: 1) the relative abundances of target insects across the uncultivated vegetation and the crop field, 2) relationships …
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Effect of nestling sex ratio on the provisioning behavior of adult Eastern Bluebirds (Sialia sialis)
… (<em>Oligochaeta</italic>spp.), spiders (<em>Araneae</italic>), and cicadas (<em>Hemiptera</italic>). Overall, male and female bluebirds delivered similar types of prey to nestlings. </p>
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