Studies on Dispersal of Grasshoppers (Acrididae) Tagged with Phosphorus-32

Riegert, P. W.; Fuller, Richard A.; Putnam, L. G.

doi:10.4039/ent86223-5

Cited by 31 publications

(17 citation statements)

References 4 publications

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“…In both studies, because of the size of the plots relative to the distances grasshoppers are able to move over short time periods (Reigert et al 1954, Joern 1983, the results may partially reßect habitat selection by grasshoppers. A.…”

Section: Discussionmentioning

confidence: 96%

Effects of Livestock Grazing on Grasshopper Abundance on a Native Rangeland in Montana

et al. 2010

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Livestock grazing can affect habitat quality for grasshoppers through effects on food and oviposition site availability, microclimate, and other factors. Because of this, some authors have suggested that grazing programs can be used to help manage pest grasshopper populations. In a 6-yr study, we controlled access of cattle to replicated experimental plots on an Agropyron spicatum/Poa sandbergii pasture to create consistent year-to-year differences in postgrazing plant cover, with resultant affects on microclimate. After sampling grasshoppers multiple times after grazing treatments each summer, we found evidence of between-treatment differences in grasshopper abundance for the entire assemblage during 4 of the 6 yr. Some species, including Melanoplus sanguinipes (perhaps the worse rangeland grasshopper pest in the western United States), tended to be more abundant on ungrazed plots, whereas Melanoplus gladstoni often had greater densities on heavily-grazed plots. The effect of grazing on grasshopper densities in this study was lower in magnitude and less consistent among years than in a study we conducted simultaneously at a nearby site where the vegetation was dominated by the exotic species crested wheatgrass (Agropyron cristatum). Our results generally support proposals that grazing could be used to reduce pest grasshopper densities, although the effectiveness of a particular grazing scheme may vary among sites, years, and grasshopper and vegetation assemblages.

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Section: Discussionmentioning

confidence: 96%

Effects of Livestock Grazing on Grasshopper Abundance on a Native Rangeland in Montana

et al. 2010

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“…The relative dispersal of each sex has been rarely studied in orthoptera (Lorch and Gwynne 2000;Bailey et al 2007), probably due to the difficulty of monitoring marked individuals (e.g. Riegert et al 1954;Lorch et al 2005) together with the lack of suitable nuclear markers necessary to obtain detailed information on fine-scale spatial genetic structure (Ustinova et al 2006;Chapuis et al 2008). The single-year generation time of M. wagneri makes this species an interesting model system to study asymmetric dispersal of sexes using molecular methods.…”

Section: Introductionmentioning

confidence: 99%

Fine-scale spatial genetic structure and within population male-biased gene-flow in the grasshopper Mioscirtus wagneri

2011

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Dispersal is a life history trait that plays a key role in population dynamics, determining gene flow and influencing the size, structure and persistence of populations. For these reasons, the study of the genetic consequences of dispersal can be considered a central topic in both conservation and population genetics. In this study we examine the patterns of fine-scale genetic structure within two populations of the grasshopper Mioscirtus wagneri (Orhoptera: Acrididae). For this purpose, we have used seven species-specific microsatellite markers to type 266 individuals from two populations (Peña Hueca and El Salobral) located in Central Spain. We have found subtle genetic differentiation between some sampling patches and significant kinship structures up to 25 m distance which were particularly patent for females. In Peña Hueca locality, patterns of isolation-by-distance at both the patch scale and the individual level have also revealed an association between genetic differentiation/ similarity and geographical distance in females but not in males. Overall, these data suggest a fine-scale spatial genetic substructure in the studied populations which seems to be mainly driven by female philopatry. Such pattern of within population genetic structure together with the inferred restricted dispersal distances is likely to contribute to reduce effective population sizes and inter-population gene flow. This can erode genetic variability and limit the colonization ability of this orthoptera, factors which can ultimately compromise the long-term persistence of their small size and isolated populations.

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“…A number of authors have studied movement of one or a few particular grasshopper species in experiments across a range of conditions (Riegert, Fuller & Putnam 1954; Clark 1962; Aikman & Hewitt 1972; Mason, Nichols & Hewitt 1995). These studies have indicated that the net displacement of grasshoppers varies as a function of species and development.…”

Section: Introductionmentioning

confidence: 99%

“…Podisma pedestris L.; Mason, Nichols & Hewitt 1995). In some cases, the sites of the studies were abnormally simplified, including a golf course (Aikman & Hewitt 1972) and bare ground (Riegert, Fuller & Putnam 1954), so extrapolation to the structural complexity of rangeland is tenuous. Finally, previous studies have not addressed the effect of density on grasshopper movement, and only one study (Riegert, Fuller & Putnam 1954) analysed dispersal as a function of development.…”

Section: Introductionmentioning

confidence: 99%

“…In some cases, the sites of the studies were abnormally simplified, including a golf course (Aikman & Hewitt 1972) and bare ground (Riegert, Fuller & Putnam 1954), so extrapolation to the structural complexity of rangeland is tenuous. Finally, previous studies have not addressed the effect of density on grasshopper movement, and only one study (Riegert, Fuller & Putnam 1954) analysed dispersal as a function of development. Although these studies provide insight into specific aspects of grasshopper behaviour, the results are difficult to apply in a pest management context, where grasshoppers occur at high densities in complex rangeland habitats.…”

Section: Introductionmentioning

confidence: 99%

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ADVANCES IN APPLIED ECOLOGICAL TECHNIQUES A novel mark–recapture technique and its application to monitoring the direction and distance of local movements of rangeland grasshoppers (Orthoptera: Acrididae) in the context of pest management

Narisu

Lockwood

Schell

1999

Journal of Applied Ecology

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Summary1. Rangeland grasshopper movement was studied in Wyoming, USA, with respect to the biological and ecological factors (population density, developmental stage and weather) in¯uencing net displacement and directionality. 2. A novel adaptation of the mark±recapture method was developed to monitor grasshopper dispersal. The method used¯uorescent powder and resighting marked grasshoppers in the ®eld with ultraviolet light, rather than physical recapturing of individuals. 3. Rangeland grasshoppers exhibited a strong tendency for directional movement. Adult grasshoppers demonstrated a signi®cant tendency for dispersal in a northwesterly direction across a range of population densities (5±8, 10±15 and r 18 grasshoppers m ±2 ). Although not a de®nitive explanation, weather might have in¯uenced this behaviour, as the grasshoppers consistently moved upwind. 4. The mean displacement of grasshoppers in a 36-h period ranged from 2´3 m in nymphs to 3´7 m in adults, with the distance of displacement being positively correlated with population density.5. An understanding of grasshopper movement in terms of directionality and displacement has immediate applicability to reduced agent±area treatments for rangeland grasshopper management.

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Studies on Dispersal of Grasshoppers (Acrididae) Tagged with Phosphorus-32

Cited by 31 publications

References 4 publications

Effects of Livestock Grazing on Grasshopper Abundance on a Native Rangeland in Montana

Effects of Livestock Grazing on Grasshopper Abundance on a Native Rangeland in Montana

Fine-scale spatial genetic structure and within population male-biased gene-flow in the grasshopper Mioscirtus wagneri

ADVANCES IN APPLIED ECOLOGICAL TECHNIQUES A novel mark–recapture technique and its application to monitoring the direction and distance of local movements of rangeland grasshoppers (Orthoptera: Acrididae) in the context of pest management

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