Cuticular hydrocarbons of Gonipterus weevils: are there species differences?

Souza, Natália Medeiros de; Schröder, Michelle L.; Hayes, R. Andrew; Bello, Jan E.; Nahrung, Helen F.

doi:10.1007/s00049-021-00337-5

Cited by 6 publications

(29 citation statements)

References 42 publications

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“…Recent work by Souza et al 12 showed that the cuticular hydrocarbon profiles of Gonipterus weevils revealed good corroboration with the results of molecular sequencing data, indicating that this chemotaxonomic approach could be used for the classification of species from this genus. Cuticular hydrocarbon profiling is typically performed using GC-MS, which provides a low limit of detection and a high level of specificity.…”

Section: Introductionmentioning

confidence: 74%

“…Furthermore, virtually all current extraction methods for CHCs require the insect to be killed first, meaning that it is a destructive technique. 12…”

Section: Introductionmentioning

confidence: 99%

“…Following on from recent work by Souza et al 12 demonstrating that cuticular hydrocarbon profiles could be used to discriminate between different Gonipterus species, this proof-of-concept study aimed to investigate the prospect of NIR spectroscopy for the rapid discrimination between different genera in the Gonipterini tribe.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, virtually all current extraction methods for CHCs require the insect to be killed first, meaning that it is a destructive technique. 12 In recent years, there has been increasing interest in the use of rapid, non-invasive analytical techniques for gathering information about the chemical composition of animal and insect specimens. 13,14 One of the emerging techniques is near infrared (NIR) spectroscopy, which uses infrared wavelengths between 750-2500 nm to acquire information about the identity and relative abundance of different types of chemical bonds present in the sample.…”

Section: Introductionmentioning

confidence: 99%

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Discrimination of Gonipterini weevil genera using near infrared spectroscopy

Johnson

2022

Journal of Near Infrared Spectroscopy

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This proof-of-concept study aimed to investigate the potential of using near infrared (NIR) spectroscopy to discriminate between genera of Gonipterini weevil. NIR spectra (10,000–4,000 cm−1) were collected from 15 Gonipterini specimens, comprising three genera and five species. Principal component analysis (PCA) highlighted the inter-specific variation in NIR spectra, with separation observed between most species across the first two principal components. Partial least squares discriminant analysis (PLS-DA) could be used to differentiate between the genera (78% accuracy), although support vector machine (SVM) modelling gave improved accuracy (91%). The results support the prospect of NIR spectroscopy for the rapid discrimination between Gonipterini genera.

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Section: Introductionmentioning

confidence: 74%

“…Furthermore, virtually all current extraction methods for CHCs require the insect to be killed first, meaning that it is a destructive technique. 12…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Discrimination of Gonipterini weevil genera using near infrared spectroscopy

Johnson

2022

Journal of Near Infrared Spectroscopy

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“…11 were also phylogenetically grouped within the G. scutellatus complex but did not have the squarely protruding apex of the aedeagus that is characteristic of the complex [14]. These species could also be separated based on their cuticular hydrocarbon profiles [48]. A taxonomic review of Gonipterus and the G. scutellatus complex is needed to describe the previously undescribed species and to determine whether the species without a squarely protruding apex is to be included in the G. scutellatus complex.…”

Section: Discussionmentioning

confidence: 99%

Distribution of Gonipterus Species and Their Egg Parasitoids in Australia: Implications for Biological Control

Schröder

Nahrung

Souza

et al. 2021

Forests

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Gonipterus species are pests of Eucalyptus plantations worldwide. The egg parasitoid wasp Anaphes nitens is used in many countries for the biological control of Gonipterus spp. Recent taxonomic studies have shown that the three invasive Gonipterus spp., which were previously considered as G. scutellatus, form part of a cryptic species complex. These taxonomic changes have implications for the biological control of Gonipterus spp. The aims of this study were to understand the species composition and distribution of Gonipterus spp. and their egg parasitoids in Australia. Gonipterus spp. adults and egg capsules were collected in south-eastern Australia and Tasmania. Adult Gonipterus were identified using morphology and DNA barcoding. Parasitoids were reared from Gonipterus egg capsules and identified. Thirteen Gonipterus species were collected: twelve species were found on the Australian mainland and one species in Tasmania. These included three described species, four previously recognized but undescribed species, two undescribed species and four unidentified species. Five egg parasitoid species that attack Gonipterus spp. were identified. Anaphes nitens, Centrodora damoni and Euderus sp. were identified on the Australian mainland and A. tasmaniae and A. inexpectatus were identified in Tasmania. The results from this study will contribute to the improvement of Gonipterus biological control in the future.

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Cuticular Hydrocarbon Profiling of Australian Gonipterini Weevils

Johnson

2023

AppliedChem

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Cuticular hydrocarbon (CHC) profiling shows promise as a chemotaxonomic tool for identifying and discriminating between closely related insect species. However, there have been limited studies using CHC profiling to differentiate between weevil species (Coleoptera: Curculionidae). This proof-of-concept study investigated the use of CHC and volatile profiling to discriminate between five weevil species from three genera in the Gonipterini tribe. A total of 56 CHCs and 41 other volatile compounds were found across the five species, with 83 of the compounds being identified through their mass fragmentation patterns. The number of CHCs from each species ranged from 20 to 43, while the proportion of CHCs unique to each species varied between 0% and 19%. The most abundant CHCs were nonacosane, 7-methylheptacosane, heptacosane, and hexacosane. Principal component analysis of the centred log-ratio transformed data revealed broad differences in CHC profiles between the two Oxyops species, with Bryachus squamicollis demonstrating the greatest divergence from the other Gonipterini species. The results suggest that CHC analysis could be used to support established taxonomic methods, including morphological features and genetic sequencing results.

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Cuticular hydrocarbons of Gonipterus weevils: are there species differences?

Cited by 6 publications

References 42 publications

Discrimination of Gonipterini weevil genera using near infrared spectroscopy

Discrimination of Gonipterini weevil genera using near infrared spectroscopy

Distribution of Gonipterus Species and Their Egg Parasitoids in Australia: Implications for Biological Control

Cuticular Hydrocarbon Profiling of Australian Gonipterini Weevils

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