Long-term Dynamics of Phytophagous Lady Beetle Populations under Different Climate Conditions in Sumatra and Java, Indonesia.

浩二, 中村; Kahono, Sih; Hasan, Nusyirwan; Abbas, Idrus; 進, 中野; 晋作, 小路; Hasyim, Ahsol; Astuti, Dwi; Syafril,

doi:10.3759/tropics.10.427

Cited by 9 publications

(11 citation statements)

References 14 publications

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“…As a whole, the degree of adaptation to centro of the Bogor populations of H. vigintioctopunctata fluctuated but gradually increased from year to year with regards to both adult feeding preference for, and ability of larvae to develop on, this novel host, without obvious decrease in the ability to use the normal host S. torvum (Figs ). Given that H. vigintioctopunctata has eight generations at most per year in Indonesia (Nakamura et al ), this evolutionary change of the host specificity took place during about 50 or less generations. It is difficult to predict that the adaptation to centro by the Bogor populations will further proceed and result in the establishment of a generalist on solanaceous plants and centro.…”

Section: Discussionmentioning

confidence: 99%

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A solanum beetle on a fabaceous weed: Host plant generalization and specialization are two sides of the same coin

Ueno

Fujiyama

Kahono

et al. 2017

Entomological Science

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Investigations of the ongoing evolutionary change of host specificity, especially of that in the initial phase, contribute largely to our understanding of the mechanisms responsible for the diversification of phytophagous insects. However, empirical studies of this aspect in natural systems are very scanty. In the present study, we document the evolutionary change of the degree of adaptation to an introduced legume centro by adults and larvae of the herbivorous ladybird beetle Henosepilachna vigintioctopunctata (Fabricius), which depends normally on various solanaceous plants. Results obtained through experiments conducted in seven successive years revealed a fluctuating degree of adaptation, but with a gradual increase, to centro by H. vigintioctopunctata, showing a tendency towards host plant generalization. Of particular importance, our results suggest that both host plant specialization and generalization are possible evolutionary outcomes of a dynamic initial phase of ongoing host range expansion. In addition, results of quantitative genetic analyses on larval development and other circumstantial evidence suggested that the evolutionary trajectories to specialization/generalization are largely determined by ecological conditions rather than by the insects' intrinsic genetic architecture. We also discuss some special aspects of acquisition of, and adaptation to, novel hosts by H. vigintioctopunctata and other herbivorous beetles, of which adults also feed on plant leaves.

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Section: Discussionmentioning

confidence: 99%

“…Henosepilachna vigintioctopunctata is multivoltine, having at most eight generations per year in Indonesia (Nakamura et al ). Adults and larvae feed on leaves of the same plant species.…”

Section: Methodsmentioning

confidence: 99%

A solanum beetle on a fabaceous weed: Host plant generalization and specialization are two sides of the same coin

Ueno

Fujiyama

Kahono

et al. 2017

Entomological Science

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“…Population censuses of different life-history stages (egg, third-instar larvae, fourth-instar larvae, pupae, teneral adults and mature adults) were made at 3-7 day intervals over a period of 37 months from January 1982 to January 1985 at Padang and for almost 10 years between 1991 and 2000 at Sukarami. Full details of the field sites and sampling techniques are given in Nakamura et al (1990Nakamura et al ( , 2001). Life-history experiments in the laboratory have shown that there are differences in life histories between the sites.…”

Section: Ladybeetle Time-seriesmentioning

confidence: 99%

Generation cycles in Indonesian lady beetle populations may occur as a result of cannibalism

Nakamura

Hasan²,

Abbas³

et al. 2004

Proc. R. Soc. Lond. B

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Generation cycles, population cycles with a period of approximately one generation, have been observed in a variety of field and laboratory studies. Such dynamics are predicted to arise through the effects of resource competition and cannibalism or involve consumer-natural enemy interactions. We first show, using a new highly simplified model, that generation cycles are a very common outcome of strongly age-structured intraspecific interactions involving cannibalism. We then analyse a series of unique long-term time-series of ladybeetle (Coccinellidae) abundances from tropical Indonesia. Some of the time-series display clear generation cycles, and we argue that there is strong evidence that these are caused by intraspecific cannibalism.

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“…As part of a long-term study on the insect fauna of Indonesia ( Inoue et al , 1993;Nakamura et al , 2001;Sota et al , 2001 ) the population dynamics and life tables of a number of tropical beetles have been intensively monitored ( Abbas & Nakamura, 1985;Nakamura et al , 1988Nakamura et al , , 1989Nakamura et al , , 1990Noerdjito & Nakamura, 1999 ). With the availability of such long-term population dynamic data, the broad objective in this study therefore is to explore processes and identify the mechanisms leading to the population fluctuations in two lady beetles ( Epilachna vigintioctopunctata Coleoptera: Coccinellidae: Epilachninae and Epilachna enneasticta Coleoptera: Coccinellidae: Epilachninae) from western Indonesia.…”

Section: Introductionmentioning

confidence: 99%

Density dependence and noise determine the long‐term dynamics of two species of lady beetle (Coleoptera: Coccinellidae: Epilachninae) in the Indonesian tropics

Bonsall

Hasan²,

Nakamura

2006

Ecological Entomology

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1. The long-term dynamics of two beetles ( Epilachna vigintioctopunctata and Epilachna enneasticta ) from Indonesia are analysed using descriptive time-series statistics and mechanistic time-series models.2. Statistical analysis of the time series reveals that the dynamics of E. vigintioctopunctata are underpinned by a second order density-dependent [AR(2)] process, which is consistent between sites. Similarly, the dynamics of E. enneasticta are also described by a second order density-dependent [AR(2)] process. The predicted dynamics from these statistical models are stable dynamics.3. Mechanistic models of the density dependence predict that in the absence of noise the dynamics of the populations should also be stable. Inclusion of the stochasticity in the models of density dependence allows a more accurate description of the population dynamics of each species to be determined.4. Correlation analyses reveal that the fluctuations between species are a function of both the density dependence and the environmental conditions experienced by each species. Under low environmental variance it is predicted that the dynamics could be synchronised but under high variance in environmental noise, the dynamics may not be synchronised and species respond idiosyncratically to the environment.5. The study highlights the value of long-term population dynamic time series for exploring the structure of population regulation and fluctuations in insect populations. Entomology, 32, 28-37 y ¼ a 0 1 a 1 Á x h1 t 1 a 2 Á x h2 t21 30 Michael B. Bonsall, Nusyirwan Hasan and Koji Nakamura

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Long-term Dynamics of Phytophagous Lady Beetle Populations under Different Climate Conditions in Sumatra and Java, Indonesia.

Cited by 9 publications

References 14 publications

A solanum beetle on a fabaceous weed: Host plant generalization and specialization are two sides of the same coin

A solanum beetle on a fabaceous weed: Host plant generalization and specialization are two sides of the same coin

Generation cycles in Indonesian lady beetle populations may occur as a result of cannibalism

Density dependence and noise determine the long‐term dynamics of two species of lady beetle (Coleoptera: Coccinellidae: Epilachninae) in the Indonesian tropics

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