Constraints on the Evolution of Host Choice by Phytophagous Insects

Carrière, Yves

doi:10.2307/3546984

Cited by 19 publications

(13 citation statements)

References 52 publications

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“…These females are then expected to evolve specific oviposition plasticity that adjusts egg maturation to the presence of host fruits. In order to maximise its overall lifelong contribution to future generations, an organism should weigh its immediate prospects and reproductive success against its long-term future prospects (Carrière, 1998). Indeed, females achieved a high early egg-laying number.…”

Section: Discussionmentioning

confidence: 99%

Insect oviposition plasticity in response to host availability: the case of the tephritid fruit fly Bactrocera dorsalis

Zhou

Xiao

et al. 2012

Ecological Entomology

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1. Insect oviposition behaviour is ecologically and physiologically plastic. For tephritid fruit flies, Bactrocera dorsalis Hendel, host availability varies spatially and temporally. Females are expected to adopt adaptive oviposition strategies to maximise lifetime reproductive fitness, including survival. Bactrocera dorsalis oviposition tactics in response to different host availabilities were investigated.2. This study includes three treatments: (i) variable host densities (host density varied according to a fixed cycle from day to day over values of 1, 5, 10 and 20 hosts per cage), (ii) a fixed high host density (20 hosts per cage), and (iii) a fixed low host density (1 host per cage).3. Daily egg-laying number per female over the course of 27 days was entirely independent of host density and highly dependent on female age. As host availability increased, females accepted significantly more hosts, generally laid small egg clutches, and more broadly distributed the eggs.4. Tephritid fruit flies adaptively adjusted egg clutches in ways that reflected the variability of host availability. Egg-and time-limitation constraints appeared to drive these adjustments. Female egg maturation was triggered by oviposition activity and reflected marked lifetime trade-offs. Such strategies involved specific time schedules for egg laying.5.This study defined the oviposition plasticity of the tephritid fruit fly. These results have general implications for the behavioural ecology of insect herbivores and parasitoids.

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Section: Discussionmentioning

confidence: 99%

Insect oviposition plasticity in response to host availability: the case of the tephritid fruit fly Bactrocera dorsalis

Zhou

Xiao

et al. 2012

Ecological Entomology

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“…Functionally integrated characters that are inherited together are also genetically integrated in a population (Cheverud et al 1983;Cheverud 1996). For example, negative genetic correlations are an unambiguous indicator that phenotypic trade-os have evolutionary signi®cance (Charlesworth 1990;Reznick 1992), and it is plausible that traits covary positively when they are related to a single function such as locomotion, feeding, reproduction, or survivorship (Arnold 1992;CarriereÂ 1998). Alternatively, non-signi®cant or weak correlations indicate that two characters are not integrated or are independent (Cheverud 1996).…”

Section: Introductionmentioning

confidence: 97%

Four characters in a trade-off: dissecting their phenotypic and genetic relations

Stirling¹,

Roff²,

Fairbairn

1999

Oecologia

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Phenotypic characters may covary negatively because they are in a trade-off or positively because they contribute to a single function. Genetic correlations can be used to test the validity and generality of these functional relationships by indicating the level of genetic integration and checking the conditions under which they are expressed. Phenotypic correlations indicate that there is a widespread trade-off between flight capability and early fecundity in insects. Different wing morphs (long and short wing) are thought to have a suite of reproductive and flight capability traits. In a half-sib mating experiment, we estimated phenotypic relationships between two flight-capability-related characters (flight muscle condition, wing morph) and two components of early fecundity (number of eggs in the ovaries, number of eggs laid), as well as genetic correlations relating wing morph and both components of fecundity in the wing-dimorphic cricket, Gryllus firmus. The number of eggs in the ovaries and the number of eggs laid were negatively correlated phenotypically and genetically with wing length morph (i.e., long wings associated with low fecundity). Both fecundity characters differed between wing morphs, but only if flight muscle was present and not histolyzed. The phenotypic and genetic correlations between fecundity characters were not significant. This suggests that the phenotypic relationship between ovary development and eggs laid is complex, they are not genetically integrated, and they may evolve independently. However, both early fecundity characters are functionally and genetically integrated within the trade-off to a similar degree. Finally, the trade-off affects early fecundity of both wing morphs suggesting that the functional relationship depends on flight muscle size.

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“…On the other hand, a number of models of parasite -host systems predict that certain life-history traits, such as egg load or longevity, may cause females to adaptively modify their host (or habitat) preference hierarchy ( Levins & MacArthur, 1969;Ward, 1987;Mangel, 1989;Jaenike, 1990;Carriere, 1998 ), and to accept hosts more indiscriminately if not presented with a choice (e.g. Consequently, females may only encounter hosts perceived as less attractive in a multi-host setting.…”

Section: Introductionmentioning

confidence: 99%

Host‐plant use in the range expansion of the pine processionary moth, Thaumetopoea pityocampa

Stastny

Battisti

Petrucco‐Toffolo

et al. 2006

Ecological Entomology

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1. During range expansions of phytophagous insects, secondary or novel hosts may allow colonisation of areas without primary hosts. Because plant species often differ in their relative attractiveness and suitability for insects, insect preference for, and performance on, these hosts can determine recruitment potential in the current and future expansion areas.2. This study explores the relative roles of female preference and larval performance in an important pine defoliator, Thaumetopoea pityocampa (Denis & Schiffermüller) (Lepidoptera, Notodontidae), which colonises three Pinus species at its current range margin in the Italian Alps: P. nigra (primary host), P. sylvestris (secondary host), and P. mugo (novel host).3. Host use patterns in multiple insect populations were studied through choice and no-choice oviposition experiments in cages, field surveys of mixed stands, and laboratory and field monitoring of larval growth and mortality. It was predicted that a specific lifehistory trait -time limitation of short-lived females to lay a single batch of eggs -would act as a component of female performance, and lead to similar rates of host acceptance in no-choice settings.4. In the choice experiment, P. nigra was accepted the most frequently while P. sylvestris was accepted the least frequently, confirming nest density patterns in the field. Contrary to prediction, females remained discriminating in no-choice settings in spite of time limitation. In contrast, relative growth rate (RGR) and mortality of larvae did not differ significantly among the three hosts, highlighting a discrepancy between female preference and larval performance.5. Recruitment potential of T. pityocampa in future expansion into stands of P. sylvestris and P. mugo is evaluated by combining host quality, conservatism in oviposition behaviour, habitat suitability, and the opportunity for local adaptation. Entomology, 31, 481-490 * Number of larvae found in each of the remaining colonies included in parentheses. † Mean ± SE of relative growth rate (mg mg −1 day −1 ). 488 Michael Stastny et al.

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Constraints on the Evolution of Host Choice by Phytophagous Insects

Cited by 19 publications

References 52 publications

Insect oviposition plasticity in response to host availability: the case of the tephritid fruit fly Bactrocera dorsalis

Insect oviposition plasticity in response to host availability: the case of the tephritid fruit fly Bactrocera dorsalis

Four characters in a trade-off: dissecting their phenotypic and genetic relations

Host‐plant use in the range expansion of the pine processionary moth, Thaumetopoea pityocampa

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