4 research outputs found

    O que tem em sua cabeça, Zumbi? Formigas Camponotus renggeri parasitadas pelo fungo Entomopatogênico Ophiocordyceps camponoti-renggeri em um relicto de Mata Atlântica no bioma Caatinga, Brasil

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    Entomopathogenic fungi are widely known to parasitize and manipulate the behavior of various orders of arthropods. In this study, we recorded parasitism involving the entomopathogenic fungus Ophiocordyceps camponoti-renggeri and host ants of the species Camponotus renggeri in a relic of Atlantic Forest in Caatinga biome, in addition to characterizing the environmental and ecological aspects of the interaction. We found 210 infected ant workers, fixed predominantly on the margins of the abaxial face of leaves of the local vegetation. Most ants used simple phyllotaxis leaves for fixation and death, whose size varied widely. The parasitized ants died about 1.5 m above the ground. These results suggest that Ophiocordyceps camponoti-renggeri has high virulence and that the behavioral changes induced in its hosts favor their fitnessLos hongos entomopatógenos son ampliamente conocidos por parasitar y manipular el comportamiento de varios órdenes de artrópodos. En este estudio registramos el parasitismo que involucra al hongo entomopatógeno Ophiocordyceps camponoti-renggeri y hormigas hospederas de la especie Camponotus renggeri en un relicto de Mata Atlántica en el bioma Caatinga, además de caracterizar los aspectos ambientales y ecológicos de la interacción. Encontramos 210 hormigas obreras infectadas, fijadas predominantemente en los márgenes de la cara abaxial de las hojas de la vegetación local. La mayoría de las hormigas usaban hojas de filotaxia simples para adherirse y matar, cuyo tamaño variaba ampliamente. Las hormigas parasitadas morían aproximadamente a 1,5 m del suelo. Estos resultados sugieren que Ophiocordyceps camponoti-renggeri tiene una alta virulencia y que los cambios de comportamiento inducidos en sus hospedadores favorecen su fitness. Fungos entomopatogênicos são amplamente conhecidos por parasitar e manipular o comportamento de várias ordens de artrópodes. Neste estudo, registramos o parasitismo envolvendo o fungo entomopatogênico Ophiocordyceps camponoti-renggeri e formigas hospedeiras da espécie Camponotus renggeri em um relicto de Mata Atlântica no bioma Caatinga, além de caracterizar os aspectos ambientais e ecológicos da interação. Encontramos 210 formigas operárias infectadas, fixadas predominantemente nas margens da face abaxial das folhas da vegetação local. A maioria das formigas usava folhas de filotaxia simples para fixação e morte, cujo tamanho variava amplamente. As formigas parasitadas morreram cerca de 1,5 m acima do solo. Esses resultados sugerem que Ophiocordyceps camponoti-renggeri possui alta virulência e que as mudanças comportamentais induzidas em seus hospedeiros favorecem sua aptidã

    First record of Anelosimus jucundus (O. Pickard-Cambridge, 1896) (Araneae, Theridiidae) in the state of Ceará, Brazil

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    We present the first record for Anelosimus jucundus O. Pickard-Cambridge, 1896 for the state of Ceará, Brazil. We collected 22 individuals in three different ecosystems: (1) Mangrove swamps, (2) Caatinga-type desert vegetation, and (3) Montane semi-deciduous tropical forest. We corrected the misinformation of Levi's 1963 Ceará record, was actually from the state of Pernambuco. Anelosimus jucundus presents a wide altitudinal distribution, which indicates that this species can tolerate a variety climatic conditions and can colonize a variety of sites with different vegetation

    Manipulation of wasp (Hymenoptera: Vespidae) behavior by the entomopathogenic fungus ophiocordyceps humbertii in the atlantic forest in Ceará, Brazil1

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    Behavioral manipulation of hosts by parasites is important to increase the parasite fitness. Some species within the genus Ophiocordyceps, notably pathogens of ants, induce changes in the host's behavior, leading the host to die outside the colony and locking its mandibles on the edge of leaves. This study was conducted in Massif of Baturité, and for the first time, we describe the interaction between fungi and wasps in Northeastern Brazil. We found 24 specimens, eight of each species of wasp, all infected with Ophiocordyceps humbertii. The wasps were Agelaia pallipes, Apoica flavissima, and Polybia chrysothorax. All the hosts were found with their mandibles biting along the edges of leaves. © 2020 BioOne. All rights reserved
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