Morphometrics of field populations of <i>Austracris guttulosa</i> (Walker) (Orthoptera: Acrididae) in Australia

Elder, R. J.

doi:10.1111/j.1440-6055.1996.tb01416.x

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Although adults exhibit impressive migratory swarms, A. guttulosa does not exhibit many traits that are commonly associated with locust phase polyphenism [38]. For example, nymphal color does not become conspicuous upon crowding although densitydependent green/brown polymorphism appears to occur [39], adult morphometric ratios remain constant upon crowding [40], nymphs have never been observed moving in dense bands despite high local densities [38], and oviposition never occurs collectively in egg beds, suggesting the lack of group oviposition [38].…”

Section: Psychementioning

confidence: 99%

Density-Dependent Phase Polyphenism in Nonmodel Locusts: A Minireview

Song

2011

Psyche: A Journal of Entomology

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Although the specific mechanisms of locust phase transformation are wellunderstood for model locust species such as the desert locustSchistocerca gregariaand the migratory locustLocusta migratoria, the expressions of density-dependent phase polyphenism in other nonmodel locust species are not wellknown. The present paper is an attempt to review and synthesize what we know about these nonmodel locusts. Based on all available data, I find that locust phase polyphenism is expressed in many different ways in different locust species and identify a pattern that locust species often belong to large taxonomic groups which contain mostly nonswarming grasshopper species. Although locust phase polyphenism has evolved multiple times within Acrididae, I argue that its evolution should be studied from a phylogenetic perspective because I find similar density-dependent phenotypic plasticity among closely related species. Finally, I emphasize the importance of comparative analyses in understanding the evolution of locust phase and propose a phylogeny-based research framework.

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Section: Psychementioning

confidence: 99%

Density-Dependent Phase Polyphenism in Nonmodel Locusts: A Minireview

Song

2011

Psyche: A Journal of Entomology

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“…Phase polymorphic E/F* and F/C** ratios vary with phase Colour of adults and nymphs varies with phase Sexually mature adults may swarm Nymphs may form dense bands Oviposition by swarms in egg-beds Phase polymorphism not observed E/F and F/C ratios constant (Elder 1996) Colour of adults and nymphs independent of behaviour (Elder 1989) Sexually mature adults disperse Nymphs never in dense bands Individual oviposition sites widely separated *E/F, elytron length/femur length ratio; **F/C, femur length/head capsule width ratio. (without distinguishing between cropping and non cropping areas).…”

Section: Characteristics Of a Guttulosa Characteristics Commonly Asmentioning

confidence: 99%

Bionomics of Austracris guttulosa (Walker) (Orthoptera: Acrididae) During the 1970‐75 Outbreak in Queensland, Australia

Elder¹

1997

Australian Journal of Entomology

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Studies of Austracris gutrulosa (Walker) showed that oviposition was dispersed and never aggregated and that the nymphs were solitary rather than gregarious. Swarms consisted of overwintering adults in a state of reproductive diapause. Swarms dispersed once sexual maturation commenced in spring. Local and long distance movements resulted in outbreak expansion from arid to coastal and subcoastal districts of Queensland. Parasites, parasitoids and predators are listed and their distribution and effect on locust populations discussed.

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“…Other studies have been carried out using morphometry to determine the existence of a polymorphic phase in the species Austracris guttulosa (Walker), which occurs in Australia (Elder 1996), as well as the speciation process of African grasshoppers from the genus Afrophlaeoba (Hochkirch 2005). Morphometric studies help characterize phases (polymorphism), aid in studying mixtures of two populations of different origins in a single place, and give evidence of geographic advantages between populations.…”

Section: Introductionmentioning

confidence: 99%

Morphometric Variations in the Grasshopper,Chromacris speciosafrom Two Localities of Pernambuco in Northeastern Brazil

Cisneiros

Almeida

Melo

et al. 2012

Journal of Insect Science

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The present study describes morphometric variations in the grasshopper, Chromacris speciosa (Thunberg, 1824) (Orthoptera: Acridoidea: Romaleidae) from two locations in the state of Pernambuco, Brazil. The distance between the sites chosen for collections (Recife and São Lourenço da Mata) is approximately 16 km. The investigation was based on a comparative study of external morphological characteristics of the grasshoppers. Morphometric measurements took into account the different body parts and appendages. Statistical analysis of the measurements revealed significant differences in the size of the specimens between the two locations. Homogeneity tests of the covariance and equality matrices between mean vectors of the results revealed that the grasshopper populations in Recife and São Lourenço da Mata are distinctly different. These findings provide morphological evidence for intraspecific variation in morphological characteristics of the C. speciosa populations from the two locations.

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Morphometrics of field populations of Austracris guttulosa (Walker) (Orthoptera: Acrididae) in Australia

Cited by 4 publications

References 5 publications

Density-Dependent Phase Polyphenism in Nonmodel Locusts: A Minireview

Density-Dependent Phase Polyphenism in Nonmodel Locusts: A Minireview

Bionomics of Austracris guttulosa (Walker) (Orthoptera: Acrididae) During the 1970‐75 Outbreak in Queensland, Australia

Morphometric Variations in the Grasshopper,Chromacris speciosafrom Two Localities of Pernambuco in Northeastern Brazil

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