Examinando por Materia "Phoneutria boliviensis"
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- PublicaciónAcceso abiertoAspectos metabólicos del comportamiento depredador de hembras y machos de la araña Phoneutria boliviensis(Universidad de Ibagué, 2019) Suárez Benítez, Carlos Eduardo; Franco Pérez, Lida Marcela; Valenzuela Rojas, Juan Carlos
- PublicaciónAcceso abiertoComportamiento depredador en machos y hembras de Phoneutria boliviensis (F. O. PICKARD CAMBRIDGE, 1897), bajo condiciones de laboratorio(Universidad de Ibagué., 2019) Ospina Fernández, Felipe; Franco Pérez, Lida Marcela; Valenzuela Rojas, Juan CarlosPhoneutria genus is among of the most dangerous spider in the world and its distribution from the Costa Rican jungle to northern Argentina, where those responsible for human accidents are its aggressive behavior and poison toxicity. Different studies have analyzed poison toxins from these areas. In spiders, predator behavior is closely linked to toxicity, taking into account that poison along with silk are mainly the mechanisms used to capture prey. Recently it was shown that the presence of certain specific toxins in some spiders of the genus Latrodectus obey to the capture of prey as vertebrates. However, few works have addressed spider toxicity in diet function, ignoring the action of venom in natural prey. The present work aimed to analyze the predatory behavior of Phoneutria boliviensis. The great distribution of the genus in Colombia. Considering that, the toxicity can vary according to sex. 20 males and 20 females will be used to which different types of prey (invertebrates / vertebrates) will be supplied randomly. Acceptance prey, immobilization times and capture behavior between the sexes and the level of the different dams were compared. We found that P. boliviensis is a generalist spider that consumes both invertebrates and vertebrates in laboratory conditions. In addition, their predatory behavior seems not to be stereotyped and different between sexes.
- PublicaciónSólo datosDeciphering the diet of a wandering spider (Phoneutria boliviensis; Araneae: Ctenidae) by DNA metabarcoding of gut contents(Ecology and Evolution, 2021-03-06) Sierra Ramírez, Diego; Guevara, Giovany; Franco Pérez, Lida Marcela; Van der Meijden, Arie; González Gómez, Julio César; Valenzuela Rojas, Juan Carlos; Prada Quiroga, Carlos FernandoArachnids are the most abundant land predators. Despite the importance of their functional roles as predators and the necessity to understand their diet for conservation, the trophic ecology of many arachnid species has not been sufficiently studied. In the case of the wandering spider, Phoneutria boliviensis F. O. Pickard-Cambridge, 1897, only field and laboratory observational studies on their diet exist. By using a DNA metabarcoding approach, we compared the prey found in the gut content of males and females from three distant Colombian populations of P. boliviensis. By DNA metabarcoding of the cytochrome c oxidase subunit I (COI), we detected and identified 234 prey items (individual captured by the spider) belonging to 96 operational taxonomic units (OTUs), as prey for this wandering predator. Our results broaden the known diet of P. boliviensis with at least 75 prey taxa not previously registered in fieldwork or laboratory experimental trials. These results suggest that P. boliviensis feeds predominantly on invertebrates (Diptera, Lepidoptera, Coleoptera, and Orthoptera) and opportunistically on small squamates. Intersex and interpopulation differences were also observed. Assuming that prey preference does not vary between populations, these differences are likely associated with a higher local prey availability. Finally, we suggest that DNA metabarcoding can be used for evaluating subtle differences in the diet of distinct populations of P. boliviensis, particularly when predation records in the field cannot be established or quantified using direct observation.