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THE INFLUENCE OF VIBRISSAL SOMATOSENSORY PROCESSING IN RAT SUPERIOR COLLICULUS ON PREY CAPTURE

FAVARO, P. D. N.; GOUVEA, T. S.; OLIVEIRA, S. R. de; VAUTRELLE, N.; REDGRAVE, P.; COMOLI, E.
Fonte: PERGAMON-ELSEVIER SCIENCE LTD Publicador: PERGAMON-ELSEVIER SCIENCE LTD
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
26.19%
The lateral part of intermediate layer of superior colliculus (SCI) is a critical substrate for successful predation by rats. Hunting-evoked expression of the activity marker Fos is concentrated in SCI while prey capture in rats with NMDA lesions in SCI is impaired. Particularly affected are rapid orienting and stereotyped sequences of actions associated with predation of fast moving prey. Such deficits are consistent with the view that the deep layers of SC are important for sensory guidance of movement. Although much of the relevant evidence involves visual control of movement, less is known about movement guidance by somatosensory input from vibrissae. Indeed, our impression is that prey contact with whiskers is a likely stimulus to trigger predation. Moreover, SCI receives whisker and orofacial somatosensory information directly from trigeminal complex, and indirectly from zona incerta, parvicelular reticular formation and somatosensory barrel cortex. To better understand sensory guidance of predation by vibrissal information we investigated prey capture by rats after whisker removal and the role of superior colliculus (SC) by comparing Fos expression after hunting with and without whiskers. Rats were allowed to hunt cockroaches...

O estado da arte e o impacte do Executive Search na indústria em Portugal

Pinho, José Claúdio Lopes Ribeiro de
Fonte: Universidade de Aveiro Publicador: Universidade de Aveiro
Tipo: Dissertação de Mestrado
POR
Relevância na Pesquisa
26.52%
O presente trabalho visa mostrar ao leitor qual a situação do Executive Search ou Head Hunting em Portugal e respectivo impacte. Através de uma primeira abordagem teórica, onde são focados os recrutamentos interno, externo e misto enquadrar-se-á o Executive Search como um tipo de recrutamento. Explicadando a sua origem, história, evolução, funcionamento e métodologia pretende-se criar uma base sólida e sustentável ao leitor para as explicações subsequentes. Uma forma de mostrar como funciona este serviço passa pela apresentação de uma empresa do ramo, focando os seu métodos, abordagens, nicho de mercado entre outras variáveis expondo assim a prática do Executive Search. Finalmente será apresentada a conjuntura actual do Head hunting em Portugal, tentando demonstrar a sua influência na indústria. ABSTRACT: The aim of this academic work is to show the Executive Search situation in Portugal and its impact. Through a theoretical approach, focused on internal, external and mixed recruitment, Executive Search will be fitted in as a recruitment type. By explaining its origin, history, evolution, operation and methodology we intend to create in the reader a solid and sustainable basis for the subsequent explanations. To show how Executive Search works a company of the sector will be presented as well as its methods...

Zooarchaeological Study from Phum Snay (A Prehistoric Cemetery in Northwestern Cambodia)

Voeun, Vuthy
Fonte: Universidade de Trás-os-Montes e Alto Douro Publicador: Universidade de Trás-os-Montes e Alto Douro
Tipo: Dissertação de Mestrado
ENG
Relevância na Pesquisa
16.19%
Dissertação de Mestrado em Quaternário e Pré-História; The faunal assemblage from Phum Snay comprises different components, first animal bones as graves goods and second other bone fragments originating from settlement activities. However, it remains doubtful whether the bones of the second are contemporaneous with the real burial gifts. The animal bones as graves goods exhibits some very characteristics features. The mammal and reptiles remains exclusively derive from wild animals and include water buffalo, cattle, pig and crocodile and turtle and tortoise. But fish also incorporated in the grave cult. Judging from the species composition and size of the fishbone they must derive from prepared meals (like fish soup, Salted fish, Marinate fish, Rooted or smoke fish). With concern the mammal remains it is evident that in 19 burials from location A, B,C and D in excavation campaign of 2007 mostly the left, but in the location E 18 burials nearly all remains from right side. But this complete fore limbs of large bovidae, cervidae and pig were deposited from scapula until the toebones. These burial gifts were in most cases laid down on the left side of the buried human, either left to his head, his feet or left to his corps in location A...

Recrutamento e seleção de quadros especializados numa consultora de recursos humanos

Alves, Pedro Filipe Martins
Fonte: Instituto Superior de Economia e Gestão Publicador: Instituto Superior de Economia e Gestão
Tipo: Dissertação de Mestrado
Publicado em /09/2012 POR
Relevância na Pesquisa
25.97%
Mestrado em Gestão de Recursos Humanos; O recrutamento e a seleção de recursos humanos vêm assumindo uma crescente importância estratégica para as organizações, sendo hoje encarados como ramos particularmente potenciadores de vantagem competitiva. Tal, deve-se à proeminente necessidade, por parte das empresas, de procurarem manter-se competitivas através da atração dos mais distintos profissionais. Com este desígnio, a Consultoria de Recrutamento tem vindo a prosperar num passado recente, amplificando-se o número de empresas exclusivamente vocacionadas para esta área de recursos humanos. O alavancar deste serviço veio proporcionar ganhos expressivos em diversos segmentos de muitas empresas e uma redefinição e aperfeiçoamento dos processos estratégicos das mesmas. A presente análise possui o fito de discorrer acerca das atividades desenvolvidas durante o período de estágio curricular desenvolvido na empresa MSearch. Tendo integrado uma empresa que patenteia a sua atuação pelo mercado da consultoria de recrutamento, o estágio teve um enfoque primordial nas atividades associadas direta e indiretamente a esta prática, mais corporeamente ao que aos perfis e à área de Finance & Banking respeita. Por se tratar de uma área singular da Gestão de Recursos Humanos...

Head-Hunting - o processo de seleção e recrutamento : fatores críticos para o sucesso e a importância da ética

Ribeiro, Diogo João Lopes de Almeida
Fonte: Instituto Superior de Economia e Gestão Publicador: Instituto Superior de Economia e Gestão
Tipo: Dissertação de Mestrado
Publicado em /09/2012 POR
Relevância na Pesquisa
56.48%
Mestrado em Gestão de Recursos Humanos; O Executive Search é utilizado para o Recrutamento e Seleção de executivos que ocupam cargos de elevada importância nas organizações. Esta técnica é escolhida sobretudo devido ao seu método de pesquisa direta, que incide no mercado, de uma forma particular, que a distingue das restantes formas de recrutamento e seleção, procurando no mesmo os candidatos ideais, tanto a nível de soft como hard skills para ocupar aquela posição. Tem por base uma relação de confiança entre o consultor, a empresa cliente e o candidato. Este trabalho procura dar a conhecer esta atividade, que tem vindo a crescer e a ganhar importância na Gestão de Recursos Humanos, e contribuir para ser mais um elemento que forneça conhecimento sobre a mesma. Tem como objetivos principais compreender como se desenvolve esta consultoria, verificar quais as suas fases, perceber qual a importância da ética na mesma, os requisitos para ter sucesso como head-hunter e ainda a razão de recorrer a esta atividade, em vez de outro método de Recrutamento e Seleção, tendo em conta o elevado valor deste serviço. Para conseguir responder a estas questões, foram efetuadas entrevistas a consultores especializados neste tipo de consultoria...

Recrutamento e seleção na Page Personnel

Ferreira, Joana Cristina Pinto
Fonte: Instituto Superior de Economia e Gestão Publicador: Instituto Superior de Economia e Gestão
Tipo: Dissertação de Mestrado
Publicado em //2014 POR
Relevância na Pesquisa
26.33%
Mestrado em Gestão de Recursos Humanos; Os processos de Recrutamento e Seleção são momentos extremamente importantes na vida das organizações e cada vez mais, os recursos humanos das empresas são vistos como uma fonte de vantagem competitiva. A redefinição das estratégias das organizações e o seu recurso à externalização de alguns sectores tem provocado uma presença cada vez maior das empresas de consultoria no mercado, que atuam nas mais diversas áreas da Gestão de Recursos Humanos. Este Trabalho Final de Mestrado faz uma descrição sobre as atividades desenvolvidas no estágio curricular, componente integrante do Mestrado em Gestão de Recursos Humanos, que realizei no departamento de Retail e Secretarial & Management Support na Page Personnel, marca pertencente à multinacional PageGroup, que atua na área da consultoria de recrutamento. A reflexão sobre as atividades e conhecimentos apreendidos neste estágio é acompanhada por um enquadramento teórico referente aos métodos de Recrutamento e Seleção praticados pela Page Personnel, empresa que me permitiu ter uma participação ativa nas diversas fases dos processos de Recrutamento e Seleção que englobaram a pesquisa e identificação de candidatos através do e-recrutamento e do head-hunting e a sua avaliação baseada na realização de testes...

Head-hunting in the health care jungle

Gray, Charlotte
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 01/05/2001 EN
Relevância na Pesquisa
25.97%

Diethyl 4-(biphenyl-4-yl)-2,6-dimethyl-1,4-di­hydro­pyridine-3,5-di­carboxyl­ate

Steiger, Scott A.; Monacelli, Anthony J.; Li, Chun; Hunting, Janet L.; Natale, Nicholas R.
Fonte: International Union of Crystallography Publicador: International Union of Crystallography
Tipo: Artigo de Revista Científica
Publicado em 18/06/2014 EN
Relevância na Pesquisa
25.97%
The title compound, C25H27NO4, has a flattened di­hydro­pyridine ring. The benzene and phenyl rings are synclinal to one another, forming a dihedral angle of 49.82 (8)°; the axis of the biphenyl rings makes an 81.05 (9)° angle to the plane of the di­hydro­pyridine ring. In the crystal, N—H⋯O hydrogen bonds link the mol­ecules into chain motifs running along the a-axis direction. The chains are cross-linked by C—H⋯O inter­actions, forming sheet motifs running slightly off the (110) plane, together with an intermolecular interaction between head-to tail biphenyl groups, thus making the whole crystal packing a three-dimensional network. Intra­molecular C—H⋯O hydrogen bonds are also observed.

If Hunters End Up in the Emergency Room: A Retrospective Analysis of Hunting Injuries in a Swiss Emergency Department

Bestetti, Valentina; Fisher, Emma E.; Srivastava, David S.; Ricklin, Meret E.; Exadaktylos, Aristomenis K.
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.6%
Aim. to characterize the mechanisms, patterns, and outcomes of nonfatal hunting-related injuries in patients presenting to Bern University Hospital, Switzerland, and compare these to reports of hunting injuries worldwide. Methods. patients presenting with hunting-related injuries to the Emergency Department at Bern University hospital from 2000 to 2014 were identified by retrospectively searching the department database using the keyword “hunt.” Each case was analyzed in terms of the patient age and gender, the mechanism and pattern of injury, and management and patient follow-up. Results. 19 patients were identified. 16 were male with a mean age of 50 years (range: 16–74). Mechanisms of injury included firearm-related injuries, falls, and knife wounds. The most common patterns of injury were head injuries (7), followed by injuries to the upper (5) or lower limb (5) and trunk (2). Over half of the patients were admitted, and nine required emergency surgery. Conclusion. Nonfatal hunting accidents in Bern, Switzerland, are largely caused by firearms and falls and tend to occur in male hunters with a mean age of 50 years. The most common patterns of injury are orthopedic and head injuries, often requiring surgery. These findings are consistent with international studies of nonfatal hunting accidents.

Hunting party inspects the head of a slain rhinoceros

Unknown
Fonte: Australian National University Publicador: Australian National University
Formato: Original images scanned at 72-100 dpi and saved in .jpg format; 105297 bytes; image/jpeg
EN_AU
Relevância na Pesquisa
26.19%
There were a total of 18 rhinoceroses killed during this hunt.

The coming of the gods : a study of an invocatory chant (Timang Gawai Amat) of the Iban of the Baleh River region of Sarawak

Masing, James Jemut
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Thesis (PhD); Doctor of Philosophy (PhD)
EN_AU
Relevância na Pesquisa
25.97%
Traditionally, the Iban of Sarawak were swidden cultivators whose economy based on hill rice (padi bukit) depended upon the availability of virgin forest. Their farming practices, coupled with their dependence on the forest for its produce and game, and the social prestige attached to pioneers involved them in periodic migrations in search of new territory. In so doing they came into conflict with other tribes of Borneo who, like themselves, depended upon the forest for their livelihood. To be a successful pioneer an Iban had to be an effective warrior. To be an effective warrior, it was necessary, according to Iban belief, to have the assistance of their high god of war, Singalang Burong, commonly known as Lang. Lang was invoked by the performance of a gawai amat and the chanting of its associated timang. This timang depicts the gods on their journey to the world of men, and their subsequent participation in a ritual feast and other activities, at the end of which charms and blessings are bequeathed on the man who has performed this ritual. This dissertation has two objectives: i) the translation of the whole text of the timang gawai amat into an English version that captures the spirit and aesthetics of the timang as an oral tradition; and ii) the discussion of the place of this timang and its associated ritual feast in traditional !ban society. The views are advanced that this particular version of the timang came into prominence when the Iban...

Beatus leaf from a Psalter in Latin, Southern Netherlands, with a fine historiated initial showing scenes from the life of King David and with a decorative border including a hunting scene

Fonte: Rice University Publicador: Rice University
Tipo: illuminated manuscripts; Text
LAT
Relevância na Pesquisa
26.19%
Dealer description: Illuminated vellum manuscript with a fine historiated initial showing scenes from the life of King David and with a decorative border including a hunting scene. Text from Psalm 1:1 - 2:8. Southern Netherlands [possibly Saint-Omer], late 13th century, 140x102mm (5.5"x4"). Single column, 19 lines in an excellent gothic liturgical hand. Versal initials in red or blue, three line blue initial on verso with wispy red penwork elaboration in the form of delicately drawn ivy leaves extending into three margins (slightly trimmed at the top). RECTO with a wonderfully animated 12-line historiated "B" (60 x 55mm) in pink and white tracery, the initial on a ground of blue and pink knotwork, the upper compartment containing a miniature of King David harping in his palace (the towers of which poke through into the head margin), and the lower compartment showing the young David about to behead the giant Goliath, who is attired in a tunic and chainmail, both scnese in colors on a burnished gold ground, the initial with branching leafy border extending into all four margins, the border composed of blue and pink bars with twining leaves and berries in pink, blue and orange at the corners, a bas-de-page scene of a hunter with a horn and bow accompanied by two hounds pursuing a leaping stag...

We, of the Banyan tree : traditions of origin of the Alune of West Seram

Boulan-Smit, Marie-Christine
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Thesis (PhD)
Relevância na Pesquisa
25.97%
Several small communities of Alune and Wemale shifting cultivators are established in the upland region of 'Wele Telu, the 'Three Large Rivers' of West Seram in eastern Indonesia. Although the centralised state regards these peripheral desa as marginal, this is not the view of the people themselves. Comparatively more isolated than the coastal communities, the mountain 'domains' (hena, inama, anakota) claim to have preserved a traditional relationship to their land and their ancient mode of affiliation and marriage alliances. Each domain forms a social, territorial, religious and political unit which is still relatively autonomous. In the past, mountain and coastal domains participated in a larger federative ceremonial order which did not bar them from also competing for hegemony and taking part in conflicting alliances, warfare, or head-hunting raids against one another. In the middle of the 17th century, to secure total control of the clove growing industry, the Dutch East Indies Company (VOC) dismantled the ruling system of Luhu, the largest political ally of Temate on west Seram, and entirely depopulated the peninsula. For two centuries thereafter inland Seram did not attract much foreign attention. When outsiders began recording the history of 'Wele Telu a century ago...

We, of the Banyan tree : traditions of origin of the Alune of West Seram

Boulan-Smit, Marie-Christine
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Thesis (PhD); Doctor of Philosophy (PhD)
EN_AU
Relevância na Pesquisa
25.97%
Several small communities of Alune and Wemale shifting cultivators are established in the upland region of 'Wele Telu, the 'Three Large Rivers' of West Seram in eastern Indonesia. Although the centralised state regards these peripheral desa as marginal, this is not the view of the people themselves. Comparatively more isolated than the coastal communities, the mountain 'domains' (hena, inama, anakota) claim to have preserved a traditional relationship to their land and their ancient mode of affiliation and marriage alliances. Each domain forms a social, territorial, religious and political unit which is still relatively autonomous. In the past, mountain and coastal domains participated in a larger federative ceremonial order which did not bar them from also competing for hegemony and taking part in conflicting alliances, warfare, or head-hunting raids against one another. In the middle of the 17th century, to secure total control of the clove growing industry, the Dutch East Indies Company (VOC) dismantled the ruling system of Luhu, the largest political ally of Temate on west Seram, and entirely depopulated the peninsula. For two centuries thereafter inland Seram did not attract much foreign attention. When outsiders began recording the history of 'Wele Telu a century ago...

Condições e implicações no estudo da imaginação na obra tardia de Rodney Needham

Oliveira, Joana Margarida Gonçalo Ferreira de, 1979-
Fonte: Universidade de Lisboa Publicador: Universidade de Lisboa
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em //2010 POR
Relevância na Pesquisa
25.97%
Tese de mestrado, Antropologia Social, 2010, Instituto de Ciências Sociais, Universidade de Lisboa; No sentido de estudar o conceito de imaginação na obra tardia de Rodney Needham(1923-2006), isolam-se um conjunto de noções forjadas na atmosfera docomparativismo moderno. As noções de classificação, hierarquia, categoria simbólica,função classificatória e causalidade (envolvendo mediação) merecem especial atençãoneste estudo, designadamente pelas relações que mantém com ideias recebidas acerca danatureza humana. Para além de um enquadramento teorético e histórico inicial, aprimeira parte concentra-se especialmente em Primitive Classification (E. Durkheim eM. Mauss) e no estudo comparativo da instituição dos caçadores de cabeça. Na segundaparte, ponderam-se as noções de capital teorético, mudança de aspecto, facto social e representações colectivas'. Com a apresentação do princípio metodológico daclassificação politética, tenta-se dar conta do conteúdo objectivo de tais noções nosescritos de Needham entre as décadas de setenta e oitenta. O estudo da classificaçãosimbólica dual na cultura Nyoro releva a importância da estrutura quaternária daanalogia, mas, uma vez isoladas as constantes relacionais da oposição complementar eda inversão...

Invesco transearch

Frazão, Maria Madalena Aires Martins Franco
Fonte: Instituto Superior de Economia e Gestão Publicador: Instituto Superior de Economia e Gestão
Tipo: Dissertação de Mestrado
Publicado em //2014 POR
Relevância na Pesquisa
25.97%
Mestrado em Ciências Empresariais; O tema apresentado neste Relatório final de mestrado incide sobre o conceito de Executive Search aplicado na empresa Invesco Transearch. O objetivo consiste na apresentação do estágio desenvolvido na empresa Invesco Transearch descrevendo, detalhadamente, as atividades inerentes. Inicialmente, foi necessário um estudo pormenorizado do conceito de Executive Search para conseguir compreender corretamente o trabalho proposto no estágio. Assim, uma vez adquiridos os conceitos essenciais foi desenvolvido o estágio. O estágio efetuado centrou-se essencialmente, na realização de várias tarefas da responsabilidade de um Gestor de Recursos Humanos, tanto na pesquisa e análise de um Curriculum Vitae como na apreciação do perfil dos candidatos. A esta experiência, sucedeu-se uma aplicação e aprofundamento de conhecimentos teóricos e práticos previamente adquiridos. Deste modo, o estágio permitiu: . Conhecer as funções e perfil do Gestor de Recursos Humanos; . Conhecer a constituição e funcionamento da empresa; . Identificar, realizar e analisar as diferentes técnicas de forma a poder encontrar o tipo de perfil adequado ao cargo exigido pela empresa cliente; . Utilizar os conhecimentos adquiridos na Unidade Curricular de Sistemas de Informação para a utilização dos mesmos na empresa; .Conhecer os protocolos utilizados; . Realizar relatórios e informatizar dados da empresa.; The subject of this final Masters Report is the concept of Executive Search as applied in Invesco Transearch Company. The aim is to present a case study of Invesco Transearch Company describing in detail its activities. First...

A hydrodynamic sensory antenna used by killifish for nocturnal hunting

Schwarz, Jason S.; Reichenbach, Tobias; Hudspeth, A. J.
Fonte: Company of Biologists Publicador: Company of Biologists
Tipo: Artigo de Revista Científica
Publicado em 01/06/2011 EN
Relevância na Pesquisa
25.97%
The perception of sensory stimuli by an animal requires several steps, commencing with the capture of stimulus energy by an antenna that, as the interface between the physical world and the nervous system, modifies the stimulus in ways that enhance the animal's perception. The mammalian external ear, for example, collects sound and spectrally alters it to increase sensitivity and improve the detection of directionality. In view of the morphological diversity of the lateral-line system across species and its accessibility to observation and experimental intervention, we sought to investigate the role of antennal structures on the response characteristics of the lateral line. The surface-feeding killifish Aplocheilus lineatus is able to hunt in darkness by detecting surface capillary waves with the lateral-line system atop its head. This cephalic lateral line consists of a stereotyped array of 18 mechanosensitive neuromasts bordered by fleshy ridges. By recording microphonic potentials, we found that each neuromast has a unique receptive field defined by its sensitivity to stimulation of the water's surface. The ridges help determine these receptive fields by altering the flow of water over each neuromast. Modification of the hydrodynamic environment by the addition of a supplemental ridge changes the pattern of water movement...

A New Method to Quantify within Dive Foraging Behaviour in Marine Predators

Heerah, Karine; Hindell, Mark; Guinet, Christophe; Charrassin, Jean-Benoît
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 12/06/2014 EN
Relevância na Pesquisa
16.48%
Studies on diving behaviour classically divide a dive into three phases: the descent, bottom and ascent phases, with foraging assumed to occur during the bottom phase. The greater complexity of dive revealed through modern, high resolution data highlights the need to re-assess this approach and to consider a larger number of phases within individual dives. Two southern elephant seals (SES) were fitted with a head mounted Time Depth Recorder (TDR) and an accelerometer from which prey capture attempts were estimated. A Weddell seal was also fitted with a TDR. TDRs for both species recorded depth once per second. We quantified the within dive behaviour using an automated broken stick algorithm identifying the optimal number of segments within each dive. The vertical sinuosity of the segments was used to infer two types of behaviours, with highly sinuous segments indicating "hunting" and less sinuous segments indicating "transiting". Using the broken stick method the seals alternated between "hunting" and "transit" modes with an average of 6±2 and 7±0.02 behavioural phases within each dive for the Weddell seal and SES, respectively. In SES, 77% of prey capture attempts (identified from the acceleration data) occurred in highly sinuous phases (“hunting”) as defined by our new approach. SES spent more time in transit mode within a dive...

Active Touch During Shrew Prey Capture

Munz, Martin; Brecht, Michael; Wolfe, Jason
Fonte: Frontiers Research Foundation Publicador: Frontiers Research Foundation
Tipo: Artigo de Revista Científica
Publicado em 29/12/2010 EN
Relevância na Pesquisa
16.52%
Although somatosensation in multiple whisker systems has been studied in considerable detail, relatively little information is available regarding whisker usage and movement patterns during natural behaviors. The Etruscan shrew, one of the smallest mammals, relies heavily on its whisker system to detect and kill its highly mobile insect prey. Here, we tracked whisker and body motion during prey capture. We found that shrews made periodic whisker movements (whisking) with frequencies ranging from 12 to 17 Hz. We compared shrew and rat whisking and found that shrew whisking was smaller amplitude and higher frequency than rat whisking, but that the shrew and rat whisking cycle were similar in that the velocity was higher during retraction than protraction. We were able to identify four phases during the shrew hunting behavior: (i) an immobile phase often preceding hunting, (ii) a search phase upon the initiation of hunting, (iii) a contact phase defined by whisker-to-cricket contact, and (iv) an attack phase, characterized by a rapid head movement directed toward the cricket. During the searching phase, whisking was generally rhythmic and whiskers were protracted forward. After prey contact, whisking amplitude decreased and became more variable. The final strike was associated with an abrupt head movement toward the prey with high head acceleration. Prey capture proceeded extremely fast and we obtained evidence that shrews can initiate corrective maneuvers with a minimal latency <30 ms. While the shrew's rostrum is straight and elongated during most behaviors...

Allometry and ontogeny in Callibia diana Stål (Mantodea: Acanthopidae)

Avendaño,J; Sarmiento,CE
Fonte: Sociedade Entomológica do Brasil Publicador: Sociedade Entomológica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2011 EN
Relevância na Pesquisa
26.3%
The life-cycle of Callibia diana Stål is described and linear and geometric morphometrics are used for studying allometrics and shape changes throughout this neotropical mantid species' life-cycle. Significant changes were expected in the allometry and shape of the raptorial leg and abdomen, given the importance of hunting and reproduction. The allometric slopes were obtained by using total length as the independent variable. Geometric morphometrics of landmarks were used for frontal femur and tibia. Hunting and reproduction-related structures had the steepest slopes and positive allometries. Negative growth of both disc width and head width found in the last moulting event may be a consequence of prothoracic muscle growth which is responsible for predatory strike strength. The tibial claw and femur of the raptorial leg become larger, while their spines become more orthogonal to the longitudinal axes which may facilitate prey retention. These changes in mantid shape throughout ontogeny were consistent and suggested the resource allocation and development programming of the body that improved reaching distance and prey retention.