Posts tagged with health, community, parasites, defence, strategy, survive, in

Supporting Information for the catterpilar article

sâmbătă, martie 28th, 2009

Movie S1. A parasitized caterpillar, bent over the parasitoid pupae that have egressed from it, defends itself and the parasitoid pupae against a predator with violent head-swings, resulting in the predator being knocked off the twig. (2.59 MB WMV) Movie S2. A non-parasitized caterpillar hardly responds to a predator (1.43 MB WMV) Acknowledgments Top Dr. Jos [...]

Supporting Information for the catterpilar article

sâmbătă, martie 28th, 2009

Movie S1. A parasitized caterpillar, bent over the parasitoid pupae that have egressed from it, defends itself and the parasitoid pupae against a predator with violent head-swings, resulting in the predator being knocked off the twig. (2.59 MB WMV) Movie S2. A non-parasitized caterpillar hardly responds to a predator (1.43 MB WMV) Acknowledgments Top Dr. Jos [...]

Final Discussion about infested caterpillar behaveiour – part 04

vineri, martie 27th, 2009

The behaviour of parasitized hosts changed dramatically after the egression and pupation of parasitoid larvae. Hosts stopped walking and feeding and remained near parasitoid pupae. In addition, they performed 10 times more head-swings than unparasitized hosts during encounters with predators. As a result, predators were deterred in 58% of the encounters with parasitized hosts, but [...]

Defensive behaviour in the laboratory – part 03

miercuri, martie 25th, 2009

In contrast, all unparasitized caterpillars continued feeding and moving, any difference in locomotion before and after the time at which egression would have taken place (had they been parasitized) was not significant (Wilcoxon Matched Pairs test: V = 44, P = 0.23). The difference in the number of parasitized and unparasitized caterpillars moving after the [...]

Materials and Methods – part 02

marți, martie 24th, 2009

Thyrinteina leucocerae and Glyptapanteles sp. were collected from guava (Psidium guajava) and Eucalyptus grandis trees on the campus of the Federal University of Viosa, Minas Gerais, Brazil (2045? S, 4251? W). The parasitoid species awaits further taxonomic description, and voucher specimens are deposited with Prof. A. Menezes Jr. at the University of Londrina, Brazil. Caterpillars [...]

Parasitoid turns host into bodyguard – part01

luni, martie 23rd, 2009

Parasitoid Increases Survival of Its Pupae by Inducing Hosts to Fight Predators Amir H. Grosman1, Arne Janssen 1*, Elaine F. de Brito2, Eduardo G. Cordeiro2, Felipe Colares2, Juliana Oliveira Fonseca2, Eraldo R. Lima2, Angelo Pallini2, Maurice W. Sabelis1 1 Institute for Biodiversity and Ecosystem Dynamics, Section Population Biology, University of Amsterdam, Amsterdam, The Netherlands, 2 [...]

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