Rapid Herbivore Growth Enhances Enemy Attack: Sublethal Plant Defenses Remain a Paradox

Clancy, Karen M.; Price, Peter W.

doi:10.2307/1938479

Cited by 288 publications

(245 citation statements)

References 11 publications

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“…Minimum daily temperatures were almost always below the lower developmental threshold, sometimes even dropping to zero degrees Celsius. In general, Psyche 5 low temperatures can affect development negatively by causing low pupal weight and prolonged development time and thereby reducing fitness via predation pressure [28], disadvantages in mating [29][30][31] or fewer and smaller offspring [32].…”

Section: Discussionmentioning

confidence: 99%

Herbivore Larval Development at Low Springtime Temperatures: The Importance of Short Periods of Heating in the Field

Müller

Obermaier

2012

Psyche: A Journal of Entomology

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Temperature has been shown to play an important role in the life cycles of insects. Early season feeders in Palaearctic regions profit by the high nutritional quality of their host plants early in the year, but face the problem of having to develop at low average springtime temperatures. This study examines the influence of short periods of heating in the field on larval development and on mortality with the model system Galeruca tanaceti L. (Coleoptera: Chrysomelidae), an early season feeder, that hatches at low springtime temperatures. Field and laboratory experiments under different constant and variable temperature regimes were performed. While in the field, the average daily temperature was close to the lower developmental threshold of the species of 10.9• C; maximum temperatures of above 30 • C were sometimes reached. Larvae developed significantly faster, and pupae were heavier, in the field and in an assay with short periods of heating than at the same average temperature under constant conditions in the laboratory. We conclude that larvae profit substantially from short periods of heating and temperature variation in the field and that intervals of high temperature enable insect survival and exploitation of nutrient-rich food resources at early times in the season.

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Section: Discussionmentioning

confidence: 99%

Herbivore Larval Development at Low Springtime Temperatures: The Importance of Short Periods of Heating in the Field

Müller

Obermaier

2012

Psyche: A Journal of Entomology

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“…Thus, the measured larval hatching mass in this study is a good substitute for egg mass to assess parental provisioning to offspring. Larval duration was measured because prolonged larval duration may increase the exposure time to predators, parasites and other adverse factors [32,33]. Furthermore, pupal mass is an appropriate indicator for butterfly fitness, because male [34] and female [35] pupal mass is correlated with fecundity.…”

Section: (F ) Fitness Parametersmentioning

confidence: 99%

Transgenerational acclimatization in an herbivore–host plant relationship

Cahenzli

Erhardt

2013

Proc. R. Soc. B.

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Twenty years ago, scientists began to recognize that parental effects are one of the most important influences on progeny phenotype. Consequently, it was postulated that herbivorous insects could produce progeny that are acclimatized to the host plant experienced by the parents to improve progeny fitness, because host plants vary greatly in quality and quantity, and can thus provide important cues about the resources encountered by the next generation. However, despite the possible profound implications for our understanding of host-use evolution of herbivores, host-race formation and sympatric speciation, intense research has been unable to verify transgenerational acclimatization in herbivore-host plant relationships. We reared Coenonympha pamphilus larvae in the parental generation (P) on high-and low-quality host plants, and reared the offspring (F 1 ) of both treatments again on high-and low-quality plants. We tested not only for maternal effects, as most previous studies, but also for paternal effects. Our results show that parents experiencing predictive cues on their host plant can indeed adjust progeny's phenotype to anticipated host plant quality. Maternal effects affected female and male offspring, whereas paternal effects affected only male progeny. We here verify, for the first time to our knowledge, the long postulated transgenerational acclimatization in an herbivore-host plant interaction.

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“…Moreover, the time of development would determine the length of the window of vulnerability for the intraguild prey. According to the Slow Growth High Mortality hypothesis, a quicker development generates less mortality (Clancy & Price, 1987). Thus, for example, depending on historical and developmental factors, larvae of a smaller predator species could be larger than larvae of a co-occurring larger predator species at a specific moment, and this may reverse the direction of the IGP.…”

Section: Historical and Developmental Factorsmentioning

confidence: 99%

Intraguild predation among aphidophagous predators

Lucas¹

2005

Eur. J. Entomol.

150

142

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Abstract. Since the publication of papers by Polis et al. (1989Polis et al. ( , 1992, intraguild predation (IGP) has been considered in numerous systems and a growing number of papers have been published, demonstrating the ubiquity and the importance of this interaction. It appears that aphidophagous guilds constitute especially favourable systems for IGP. Temporal and spatial distributions of aphids promote interactions, such as IGP, among natural enemies. However, despite extensive laboratory and field studies, several questions remain to be answered: Which traits of the different protagonists of the system may promote or hamper the occurrence of IGP? How do ants tending aphids modulate the interaction? How should one consider the "sub-lethal" effects (and the defensive mechanisms) associated with the risk of IGP? May IGP disrupt or enhance aphid control? These different issues are discussed by focusing on the predatory species in the complex system of aphidophagous guilds. It appears that, first, IGP may constitute one of the main forces influencing the structure and dynamics of aphidophagous guilds, and therefore it has to be taken into account in research studies, and second, because of the ephemeral nature of aphid colonies and the great number of species belonging to aphidophagous guilds, understanding all the implications of the interaction, both direct and indirect, constitutes a very complex task.

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Rapid Herbivore Growth Enhances Enemy Attack: Sublethal Plant Defenses Remain a Paradox

Cited by 288 publications

References 11 publications

Herbivore Larval Development at Low Springtime Temperatures: The Importance of Short Periods of Heating in the Field

Herbivore Larval Development at Low Springtime Temperatures: The Importance of Short Periods of Heating in the Field

Transgenerational acclimatization in an herbivore–host plant relationship

Intraguild predation among aphidophagous predators

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