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Abstract:

The robber fly Mallophora ruficauda Weidemann (Diptera: Asilidae) is an important pest of apiculture in the Pampas of Argentina. As adults, they prey on honey bees and other insects, whereas the larvae are ectoparasitoids of Scarabaeidae grubs. Females of M. ruficauda lay eggs in grassland where the larvae drop to the ground after being wind-dispersed and burrow underground searching for their hosts. A temporal asynchrony exists between the appearance of the parasitoid larvae and the host, with the parasitoid appearing earlier than the host. The present study investigates whether a strategy of synchronization with the host exists in M. ruficauda and determines which of the larval instars are responsible for it. Survival patterns and duration of the immature stages of the parasitoid are investigated to determine whether there is a modulation in the development at any time that could reduce the asynchrony. Experiments are carried out to determine the survival and duration of free-living larval stadia in the absence of cues associated with the host. It is established that the first instar is capable of moulting to the second instar without feeding and in the absence of any cues related to the host, a unique event for parasitoids. Also, the first instar of M. ruficauda moults to the second stage within a narrow temporal window, and the second instar never moults in the absence of the host. After parasitizing a host, the second instar has the longest lifespan and is the most variable with respect to survival compared with the rest of the instars. All larval instars, except for those in the last (fifth) stadium, have a similar rate of mortality to that of second-instar larvae. Additionally, it is established that the host is killed during the fourth (parasitoid) stadium and that the first- and fifth-larval instars develop independently of the host. Finally, possible mechanisms that could aid in compensating for the asynchrony between the parasitoid and the host, promoting the host-parasitoid encounter, are discussed. © 2010 The Authors. Journal compilation © 2010 The Royal Entomological Society.

Registro:

Documento: Artículo
Título:Life-history traits in a parasitoid dipteran species with free-living and obligate parasitic immature stages
Autor:Crespo, J.E.; Castelo, M.K.
Filiación:Facultad de Ciencias Exactas y Naturales, CONICET - Grupo de Investigación en Ecofisiología de Parasitoides (GIEP), Departamento de Ecología, Genética y Evolución, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
Palabras clave:Asilidae; Asynchrony; Mallophora ruficauda; Scarabaeidae; Survival; apiculture; burrow; ectoparasite; environmental cue; fly; host-parasitoid interaction; larval transport; life history trait; longevity; molt; parasitoid; pest species; survival; synchrony; Argentina; Pampas
Año:2010
Volumen:35
Número:2
Página de inicio:160
Página de fin:167
DOI: http://dx.doi.org/10.1111/j.1365-3032.2010.00727.x
Título revista:Physiological Entomology
Título revista abreviado:Physiol.Entomol.
ISSN:03076962
CODEN:PENTD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03076962_v35_n2_p160_Crespo

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Citas:

---------- APA ----------
Crespo, J.E. & Castelo, M.K. (2010) . Life-history traits in a parasitoid dipteran species with free-living and obligate parasitic immature stages. Physiological Entomology, 35(2), 160-167.
http://dx.doi.org/10.1111/j.1365-3032.2010.00727.x
---------- CHICAGO ----------
Crespo, J.E., Castelo, M.K. "Life-history traits in a parasitoid dipteran species with free-living and obligate parasitic immature stages" . Physiological Entomology 35, no. 2 (2010) : 160-167.
http://dx.doi.org/10.1111/j.1365-3032.2010.00727.x
---------- MLA ----------
Crespo, J.E., Castelo, M.K. "Life-history traits in a parasitoid dipteran species with free-living and obligate parasitic immature stages" . Physiological Entomology, vol. 35, no. 2, 2010, pp. 160-167.
http://dx.doi.org/10.1111/j.1365-3032.2010.00727.x
---------- VANCOUVER ----------
Crespo, J.E., Castelo, M.K. Life-history traits in a parasitoid dipteran species with free-living and obligate parasitic immature stages. Physiol.Entomol. 2010;35(2):160-167.
http://dx.doi.org/10.1111/j.1365-3032.2010.00727.x