VARIATION IN BODY SIZE AND FLIGHT PERFORMANCE IN MILKWEED BUGS (
            <i>ONCOPELTUS</i>
            )

Dingle, Hugh; Blakley, Nigel R.; Miller, Elizabeth R.

doi:10.1111/j.1558-5646.1980.tb04825.x

Cited by 54 publications

(30 citation statements)

References 41 publications

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“…In addition to the fecundity advantage associated with large body size, larger insects are known to sustain flight longer and to survive periods of starvation better than smaller insects (Blakley 1977, Dingle et al 1980). Thus, large body size has numerous advantages for migrating insects.…”

Section: Population Dynamics and Migrationmentioning

confidence: 99%

Effects of Crowding and Host Plant Nutrition on a Wing‐Dimorphic Planthopper

Denno¹,

Douglass²,

Jacobs³

1986

Ecology

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We investigated the effects of crowding and host plant nutrition on the development time and body length (a correlate of fecundity) of Prokelisia marginata, a wing-dimorphic planthopper that feeds on the phloem sap of the intertidal marsh grass Spartina alterniflora. Crowding delayed development time for males and females ofboth volant macropters and flightless brachypters; however, host plant nutrition did not affect development time. The body length of both sexes increased when they were raised on nutritionally superior hosts, but the nutritional effect on body size was greater for females than males. Body length exhibited a significant crowding x plant nutrition interaction; crowding had a greater reducing effect on body length ifplanthoppers were raised on marginal-quality hosts than on nutritionally superior hosts. These findings are discussed in the context of the performance, population dynamics, and migration behavior of P. marginata in its various habitats.

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Section: Population Dynamics and Migrationmentioning

confidence: 99%

Effects of Crowding and Host Plant Nutrition on a Wing‐Dimorphic Planthopper

Denno¹,

Douglass²,

Jacobs³

1986

Ecology

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“…The results of this study and those of Fraser et al (2004) expand on previous studies of migration by showing a negative association between the extent of interpopulation differences in migration over the entire life cycle (both between breeding and nonbreeding areas, as well as within each) and the amount of gene flow among brook charr populations. The predictable patterns of intraspecific divergence within this postglacial lake may be relevant for elucidating how interpopulation differences in migration arise in other migratory species where there is pronounced gene flow (birds : Berthold 1988;Scribner et al 2003;mammals: Baker 1978 and references therein; invertebrates: Dingle et al 1980;McAnelly 1985). They may also make clear the habitats necessary for preserving or rehabilitating different populations at various life-cycle stages.…”

Section: Evolutionary and Conservation Implicationsmentioning

confidence: 99%

Adaptive Migratory Divergence Among Sympatiric Brok Charr Populations

Fraser

Bernatchez

2005

Evolution

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Ecological processes clearly contribute to population divergence, yet how they interact over complex life cycles remains poorly understood. Notably, the evolutionary consequences of migration between breeding and nonbreeding areas have received limited attention. We provide evidence for a negative association between interpopulation differences in migration (between breeding and feeding areas, as well as within each) and the amount of gene flow (m) among three brook charr (Salvelinus fontinalis) populations inhabiting Mistassini Lake, Quebec, Canada. Individuals (n ϭ 1166) captured throughout lake feeding areas over two consecutive sampling years were genotyped (10 microsatellites) and assigned to one of the three populations. Interpopulation differences in migration were compared based on spatial distribution overlap, habitat selection, migration distance within feeding areas, and morphology. We observed a temporally stable, heterogeneous spatial distribution within feeding areas among populations, with the extent of spatial segregation related to differential habitat selection (represented by littoral zone substrate). Spatial segregation was lowest and gene flow highest (m ϭ 0.015) between two populations breeding in separate lake inflows. Segregation was highest and gene flow was lowest (mean m ϭ 0.007) between inflow populations and a third population breeding in the outflow. Compared to outflow migrants, inflow migrants showed longer migration distances within feeding areas (64-70 km vs. 22 km). After entering natal rivers to breed, inflow migrants also migrated longer distances (35-75 km) and at greater elevations (50-150 m) to breeding areas than outflow migrants (0-15 km; Ϫ10-0 m). Accordingly, inflow migrants were more streamlined with longer caudal regions, traits known to improve swimming efficiency. There was no association between the geographic distance separating population pairs and the amount of gene flow they exchanged. Collectively, our results are consistent with the hypothesis that reduced gene flow between these brook charr populations results from divergent natural selection leading to interpopulation differences in migration. They also illustrate how phenotypic and genetic differentiation may arise over complex migratory life cycles.

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“…The Iowa population is highly migratory and representative of bugs which invade the northeastern half of North America each spring and summer (Ralph 1977;Dingle 1978Dingle , 1981Dingle et al 1980). The Iowa population is highly migratory and representative of bugs which invade the northeastern half of North America each spring and summer (Ralph 1977;Dingle 1978Dingle , 1981Dingle et al 1980).…”

Section: Experimental Populationsmentioning

confidence: 99%

“…This trait was chosen as the target for artiftcial selection because (1) it shows considerable phenotypic variation over the geographic range of O. fasciatus (Dingle et al 1980), (2) longer wings are associated with migratory tendency (Dingle et al 1980), and (3) it displays high additive genetic variance and so should respond rapidly (Hegrnann and Dingle 1982 and below). Valid comparison reqUired a common and ecologically realistic environment which did not induce diapause in the Iowa bugs.…”

Section: The Genetic Architecture Of Oncopeltus Life Historiesmentioning

confidence: 99%

Population Genetics and Evolution

Jong¹

1988

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VARIATION IN BODY SIZE AND FLIGHT PERFORMANCE IN MILKWEED BUGS ( ONCOPELTUS )

Cited by 54 publications

References 41 publications

Effects of Crowding and Host Plant Nutrition on a Wing‐Dimorphic Planthopper

Effects of Crowding and Host Plant Nutrition on a Wing‐Dimorphic Planthopper

Adaptive Migratory Divergence Among Sympatiric Brok Charr Populations

Population Genetics and Evolution

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