Simulated leks increase the capture of female<i>Sirex noctilio</i>in the absence of host volatiles

Allison, Jeremy D.; Slippers, Bernard; Bouwer, Marc Clement; Hurley, Brett Phillip

doi:10.1080/09670874.2019.1695074

Cited by 8 publications

(8 citation statements)

References 46 publications

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“…Sirex noctilio exhibit sexual dimorphism with males having an orange abdomen while the females are fully black. The fact that the presence of dead male S. noctilio increases the capture of females by unbaited traps (Allison et al 2019) suggests that the orange colouration of the males also plays a role in mate choice. Each of these hypotheses deserve investigation in laboratory and field conditions.…”

Section: Discussionmentioning

confidence: 99%

Female and maleSirex noctiliouse age and size to select a mate

Queffelec¹,

Allison²,

Slippers³

et al. 2021

Preprint

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While male mate choice in insects is a widely accepted concept, there is still limited evidence showing that lek formation is compatible with the evolution of male mate choice. In the woodwasp Sirex noctilio, males form leks that are used by females to select a mate. However, males have been observed to ignore certain females, suggesting the presence of male mate choice despite the presence of a lek mating system. In this study we demonstrate that males only attempt to mate with certain females. To understand the criteria used by males and females to select a mate, we also tested the effect of age, size, and male to female size ratio on the number of mating attempts made by males and on female receptivity. We demonstrate that size and age play a role in both male and female mate choice. Our results suggest that males must reach sexual maturity after emergence and are neither receptive nor attractive to females during the first few days of their lives. We also show that older females become less attractive to males, suggesting that female S. noctilio switch to a strict host location phase sometime after emergence. Our results show that male and female size, and the ratio between them, play a role in mate choice. While larger males are more motivated to mate, their large size can physically prevent them from mating with small females. Small females are also more attractive and more receptive to males, consistent with the presence of convenience polyandry in S. noctilio.

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Section: Discussionmentioning

confidence: 99%

Female and maleSirex noctiliouse age and size to select a mate

Queffelec¹,

Allison²,

Slippers³

et al. 2021

Preprint

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“…The male swarms of S. noctilio contrast with the definition of the classical lek‐forming species, in which males compete for territories that contain no resources vital to females, except copulation and mating (Thornhill & Alcock, 1983; Bradbury & Gibson, 1983; Shelly & Whittier, 1997). However, in support of the lek hypothesis, Allison et al (2021) reported the attraction of females to traps baited with only dead males, and Guignard et al (2020) discovered two electroantennographically detected (EAD) compounds – ( Z )‐3‐octenol and ( Z )‐3‐dodecenol – which are released from the hind legs of males, and elicited antennal responses from both sexes.…”

Section: Introductionmentioning

confidence: 99%

“…These include monitoring and surveillance (Beèche et al, 2012; Carnegie & Bashford, 2012; Iede et al, 2012), silviculture (Klasmer & Botto, 2012), and biological control (Bedding, 2009; Cameron, 2012). Existing semiochemical‐based lures are composed of host tree volatiles, mainly monoterpenes and alcohols, and attract only females (Bashford, 2008; Coyle et al, 2012; Martínez et al, 2014; Hurley et al, 2015; Erbilgin et al, 2017; Allison et al, 2021). The development of a highly attractive semiochemical‐based lure for detection and monitoring is important for effective management.…”

Section: Introductionmentioning

confidence: 99%

Biologically active cuticular compounds of female Sirex noctilio

Faal

Silk

LeClair

et al. 2022

Entomologia Exp Applicata

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The Eurasian woodwasp Sirex noctilio Fabricius (Hymenoptera: Siricidae) is a destructive pest that affects hundreds of thousands of hectares of pines in the Southern Hemisphere (Cameron, 2012;Slippers et al., 2015). The damage and economic impact caused by S. noctilio vary regionally and depend on site quality, landscape heterogeneity, tree species, and management history (Dodds & de Groot, 2012). Several management techniques have been implemented to reduce S. noctilio damage and prevent further dispersal to new areas. These include monitoring and surveillance (

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“…In addition, a study of flight behaviour showed that females exhibit a higher altitude when males are present compared to when males are absent 31 . A field trapping study observed that simulated leks, where traps were baited with dead males, increased the number of females captured in traps, potentially due to visual signals 32 . Finally, the addition of UV light greatly increased the number of S. noctilio captured in different trap types 33 .…”

Section: Introductionmentioning

confidence: 99%

Evidence for UV-green dichromacy in the basal hymenopteran Sirex noctilio (Siricidae)

Guignard

Spaethe

Slippers

et al. 2021

Sci Rep

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A precondition for colour vision is the presence of at least two spectral types of photoreceptors in the eye. The order Hymenoptera is traditionally divided into the Apocrita (ants, bees, wasps) and the Symphyta (sawflies, woodwasps, horntails). Most apocritan species possess three different photoreceptor types. In contrast, physiological studies in the Symphyta have reported one to four photoreceptor types. To better understand the evolution of photoreceptor diversity in the Hymenoptera, we studied the Symphyta Sirex noctilio, which belongs to the superfamily Siricoidea, a closely related group of the Apocrita suborder. Our aim was to (i) identify the photoreceptor types of the compound eye by electroretinography (ERG), (ii) characterise the visual opsin genes of S. noctilio by genomic comparisons and phylogenetic analyses and (iii) analyse opsin mRNA expression. ERG measurements revealed two photoreceptor types in the compound eye, maximally sensitive to 527 and 364 nm. In addition, we identified three opsins in the genome, homologous to the hymenopteran green or long-wavelength sensitive (LW) LW1, LW2 and ultra-violet sensitive (UV) opsin genes. The LW1 and UV opsins were found to be expressed in the compound eyes, and LW2 and UV opsins in the ocelli. The lack of a blue or short-wavelength sensitive (SW) homologous opsin gene and a corresponding receptor suggests that S. noctilio is a UV-green dichromate.

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Simulated leks increase the capture of femaleSirex noctilioin the absence of host volatiles

Cited by 8 publications

References 46 publications

Female and maleSirex noctiliouse age and size to select a mate

Female and maleSirex noctiliouse age and size to select a mate

Biologically active cuticular compounds of female Sirex noctilio

Evidence for UV-green dichromacy in the basal hymenopteran Sirex noctilio (Siricidae)

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