Insights to host discrimination and host acceptance behaviour in a parasitoid (Diptera: Asilidae): Implications for fitness

Crespo, José E.; Castelo, Marcela K.

doi:10.1016/j.jinsphys.2009.08.002

Cited by 11 publications

(15 citation statements)

References 43 publications

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“…The larvae are able to actively locate their hosts using chemical information provided by the hosts (Castelo & Lazzari 2004). The first instar larva of asilids, the so-called planidium (Musso 1981) can move and actively search for their hosts (Crespo & Castelo 2009). Similar location behaviour has also been reported for other dipteran larvae that are parasitic on different beetles (Godfray 1994, Brodeur & Boivin 2004.…”

Section: Lifestyle Of Asilidaementioning

confidence: 99%

A group of assassin fly pupae preserved in a single piece of Eocene amber

Haug¹,

Nagler²,

Haug³

et al. 2017

Bull. Geosci.

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Holometabolous insects represent a mega-diverse group of organisms that are dominant in most terrestrial faunas. All holometabolous insects develop via a specific transitory stage between the last larval stage and the adult, called the pupa. While insects in general have a comparably good fossil record, fossils of pupae of holometabolous insects are relatively rare. We report here four pupal specimens preserved in a single piece of amber. These represent pupa stages of assassin flies, Asilidae, and are most likely representatives of Laphriinae. While dipterans are quite common in the fossil record, especially in amber, representatives of Asilidae are comparably rare. Combining the rarity of the systematic group and the rarity of the specific life stage, these fossil remains of assassin fly pupae are extremely unusual; to date only a single specimen has been depicted in the literature. We discuss the importance of our new finding and possible interpretations regarding behavioural aspects of the group enclosed in amber.

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Section: Lifestyle Of Asilidaementioning

confidence: 99%

A group of assassin fly pupae preserved in a single piece of Eocene amber

Haug¹,

Nagler²,

Haug³

et al. 2017

Bull. Geosci.

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“…In the case of M. ruficauda, it has been seen that the order of parasitism events do not determine which larva wins competition (Barrantes, 2009). However, when larvae are raised in an environment with a large amount of competitors, orientation and acceptance of poor-quality hosts increase (Crespo & Castelo, 2009;Crespo et al, 2015). Mallophora ruficauda can discriminate its host regarding its parasitism status and indeed they can recognise but are not attracted to parasitised hosts when raised individually.…”

Section: Introductionmentioning

confidence: 99%

“…Mallophora ruficauda can discriminate its host regarding its parasitism status and indeed they can recognise but are not attracted to parasitised hosts when raised individually. However, when larvae are raised in an environment with a large amount of competitors, orientation and acceptance of poor-quality hosts increase (Crespo & Castelo, 2009;Crespo et al, 2015). Despite the fact that M. ruficauda is a solitary parasitoid and shows high levels of host specificity, data from the field show that superparasitism is common, representing almost 50% of the parasitised hosts (Castelo, 2003).…”

Section: Introductionmentioning

confidence: 99%

Behavioural plasticity induced by intraspecific competition in host orientation in a parasitoid

Martinez

Castelo

Crespo

2017

Ecological Entomology

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1. Accurate measurement of external conditions is fundamental for survival. For parasitoids, in particular, sensing the environmental conditions is key because they are short-lived animals that must acquire information shortly after emergence.2. This study investigated whether conspecifics during larval growth can influence and modify the decision to orient to different quality hosts in a parasitoid with an active host-seeking larva. How the density of conspecifics during growth modifies these decisions was also studied.3. When larvae were submitted to increases in the intensity of pre-parasitism competition and then offered different host odours, they increased the orientation to poor-quality hosts likewise. It was also found that this behaviour is general to orientation to hosts in different physiological states.4. These results show that pre-parasitism competition can influence and modulate orientation to poor-quality hosts when high-quality hosts are not available.

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“…As for the identity of hosts, it is well known that volatile and cuticular chemicals are involved [ 8 , 9 , 10 , 11 ]. Regarding the parasitism status, many examples show that parasitoids are capable of host discrimination [ 3 , 12 , 13 , 14 , 15 , 16 ]. Host discrimination has been defined as the ability of female parasitoids to distinguish parasitized from unparasitized hosts [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…This parasitoid has a solitary lifestyle meaning that although more than one parasitoid may attach to the host (superparasitism), only one can survive and reach the adult stage. Although it has been found that M. ruficauda larvae are capable of host discrimination regarding its parasitism status, superparasitism is common in the field [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Incidence of Non-Immunological Defenses of Soil White Grubs on Parasitism Success of Mallophora ruficauda Larva (Diptera: Asilidae)

Castelo

Crespo

2012

Insects

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White grubs are larvae of Coleoptera of the family Scarabaeidae. They are known because of their intensive feeding habits on crop roots. Mallophora ruficauda (Diptera: Asilidae) is a dipteran parasitoid whose larva is a natural enemy for white grubs. This species is a solitary ectoparasitoid, where both female and larva realize different steps in the host location process. Female place its eggs in high grasslands and then, the larva finds and parasitizes the host in the ground. There are nine potential hosts in the area of action of this parasitoid; however a high preference for Cyclocephala signaticollis has been observed (87% of field parasitism). It is known that many insects have developed defensive and immunological mechanisms when attacked by a parasitoid, which can be behavioral, physiological, chemical or genetic. The objectives of this work were to investigate what kind of defense and non-immunological associated mechanisms the white grubs have against this parasitoid and to understand why M. ruficauda have such a high preference for masked chafer grubs or Cyclocephala species. In particular, for each white grub species, we asked: (1) If there is a differential behavioral reaction when a parasitoid attack is simulated; (2) If body attributes of white grubs species have influence on defense behavior, and particularly for the masked chafer C. signaticollis; and (3) Why this species is the most selected by M. ruficauda. It was found that behavioral defenses of white grubs would explain the parasitism pattern of M. ruficauda larvae and its preference for C. signaticollis.

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Insights to host discrimination and host acceptance behaviour in a parasitoid (Diptera: Asilidae): Implications for fitness

Cited by 11 publications

References 43 publications

A group of assassin fly pupae preserved in a single piece of Eocene amber

A group of assassin fly pupae preserved in a single piece of Eocene amber

Behavioural plasticity induced by intraspecific competition in host orientation in a parasitoid

Incidence of Non-Immunological Defenses of Soil White Grubs on Parasitism Success of Mallophora ruficauda Larva (Diptera: Asilidae)

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