Variation among conspecific insect populations in the mechanistic basis of diet breadth

Singer, Michael C.; Thomas, Chris D.; Billington, H. L.; Parmesan, Camille

doi:10.1016/0003-3472(89)90061-4

Cited by 68 publications

(49 citation statements)

References 17 publications

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“…This view is consistent with studies that stress the role of behaviour in host determination (Jaenike, 1978(Jaenike, , 1990Courtney, 1983;Iwasa et al, 1984;Singer et al, 1988Singer et al, , 1989Conner, 1991;Leder-house et a!., 1992). The genetic basis for these behavioural factors and their associations with physiological performance need to be investigated.…”

Section: Discussionsupporting

confidence: 79%

Genetic basis for different host use in Epilachna pustulosa, a herbivorous ladybird beetle

1997

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The genetic basis for different host plant use was studied in a herbivorous ladybird beetle, Epilachna pustulosa, that exhibits interpoputational variation in host plant utilization. It usually depends on thistle, but one of the local forms occurs on both thistle and blue cohosh, which differ at the infraclass taxonomic level. In this local population, genetic association between the developmental performance on the two plants was neutral, suggesting genetic independence across the host plants. The form of reaction norms indicated some changes in relative rank position. Genetic variation among individuals on each host plant was detected. These results suggest that different genotypes are selected on different host plants and that a substantial proportion of the overall phenotypic plasticity is contributed by genotype-dependent environmental effects.

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Section: Discussionsupporting

confidence: 79%

Genetic basis for different host use in Epilachna pustulosa, a herbivorous ladybird beetle

1997

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“…In many cases, however, the mechanisms generating such patterns are not well understood. This is particularly the case for oligophagous and polyphagous insect herbivores, for which a variety of behavioral and ecological mechanisms may result in observed patterns of multiple host-plant use (Singer 1983;Singer et al 1989;Singer and Parmesan 1993). With respect to behavioral mechanisms for example, polyphagy at the population level may result from either monophagous individuals associated with multiple host-plant species, or from polyphagous individuals.…”

Section: Introductionmentioning

confidence: 96%

How foraging tactics determine host-plant use by a polyphagous caterpillar

Singer

Stireman

2001

Oecologia

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The use of multiple host-plant species by populations of insect herbivores can result from a variety of possible ecological and behavioral mechanisms. An understanding of the foraging mechanisms determining polyphagy in relation to local ecological conditions is therefore essential to understanding the evolutionary ecology of polyphagy. Here, we evaluate patterns of host-plant use by the polyphagous caterpillar Grammia geneura (Lepidoptera: Arctiidae) in relation to host-plant availability and foraging tactics of individuals. Field surveys of caterpillar feeding and plant abundance carried out across several sites, seasons, and years showed that: (1) G. geneura consistently preferred forbs to grasses and woody plants, (2) forb-feeding was opportunistic, supporting the idea that caterpillars sample locally available host-plants, and (3) there were consistent patterns of host-plant use that were not explained by host-plant availability (electivity). An independent set of 7-h observations of 11 caterpillars showed that electivity for a subset of caterpillar-host associations could be explained by variation in the probability of initiating feeding and the average duration of feeding bouts on different hosts but not by variation in the probability of encountering different hosts, thus providing a behavioral basis for the observed variation in host-plant use. The use of detailed foraging tactics by larvae to explain host-plant use at the population level is a novel contribution of this study.

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“…Later work demonstrated this through extensive surveys and experiments of numerous butterfly populations. At one site, a plant Volume 81 THE QUARTERLY REVIEW OF BIOLOGY species that was not the most preferred by any insect (in choice tests) received 80% of the eggs, presumably because it was abundant and the preferred plant was rare (Singer et al 1989). At a second site, a plant species preferred over all others by 25% of the butterflies received only 5% of the eggs in the field, presumably because of its rarity (Singer 1983).…”

Section: Host Plant Abundancementioning

confidence: 99%

Community heterogeneity and the evolution of interactions between plants and insect herbivores

Agrawal

Lau

Hambäck

2006

The Quarterly Review of Biology

265

226

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Variation among conspecific insect populations in the mechanistic basis of diet breadth

Cited by 68 publications

References 17 publications

Genetic basis for different host use in Epilachna pustulosa, a herbivorous ladybird beetle

Genetic basis for different host use in Epilachna pustulosa, a herbivorous ladybird beetle

How foraging tactics determine host-plant use by a polyphagous caterpillar

Community heterogeneity and the evolution of interactions between plants and insect herbivores

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