Contest and scramble competitions in two bruchid species, <i>Callosobruchus analis</i> and<scp>C. phaseoli</scp> (Coleoptera: Bruchidae)

Toquenaga, Yukihiko; Fujii, Koichi

doi:10.1007/bf02514579

Cited by 12 publications

(6 citation statements)

References 17 publications

(19 reference statements)

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“…Such an approach allows then formulating experimentally testable hypothesis which ecological factors are proximately responsible for their niche segregation (Arthur, 1987;McLachlan, 1993). However, despite their importance of this ecological concept, experimental studies on the factors driving the observed niche segregation of sister taxa are astonishingly rare in the literature (exceptions are Toquenaga & Fujii, 1991;Geervliet et al, 2000;Dietrich & Wehner, 2003).…”

Section: Introductionmentioning

confidence: 96%

Experimental evidence for niche segregation in a sister species pair of non-biting midges

et al. 2012

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The principle of limiting similarity states that closely related species need to partition resources of the habitat in order to coexist in the same general area. We tested this hypothesis experimentally with a sister species pair of non-biting midges (Chironomus riparius and C. piger) by assessing their relative larval fitness under several concentrations of nitrite and temperature regimes, as suggested by the observed habitat segregation in a previous field study. Both chironomid species often occur in eutrophic habitats like agricultural areas or industrial point source effluents. Based on field observations, we hypothesised C. piger to tolerate higher nitrite concentrations, higher temperatures and larger temperature ranges than C. riparius. As predicted, C. piger coped better with higher nitrite concentrations. Against the expectations, C. riparius had a tendentially higher fitness at both higher constant temperatures and larger daily temperature ranges. However, the interaction of both stressors favoured C. piger in warm high-nitrite habitats thus concurring to the field observations. The complex interaction of candidate environmental factors with antagonistic effects found here emphasises thus the necessity to experimentally assess field observations of niche segregation.

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Section: Introductionmentioning

confidence: 96%

Experimental evidence for niche segregation in a sister species pair of non-biting midges

et al. 2012

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“…Callosobruchus maculatus (F.) and C. phaseoli (Coleoptera: Bruchidae) were used as host species and the experimental population dynamics of these two species have previously been studied (Ike 1984;Toquenaga and Fujii 1991). Stocks have been maintained under laboratory conditions, 70~ R.H. and 16L : 8D, with azuki beans Vigna angularis var.…”

Section: Methodsmentioning

confidence: 99%

Temporal/spatial structure and the dynamical property of laboratory host‐parasitoid systems

Tuda

1996

Population Ecology

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The effects of spatial structure in terms of local capacity, or the maximum number of larvae surviving competition at resource patches, and temporal structure in terms of the period vulnerable to parasitoid attack in host populations on the persistence of host-parasitoid systems were quantitatively evaluated by laboratory experiments and well-parameterized model analyses. One of two bruchid beetles, Callosobruchus maculatus and C. phaseoli, were used as a host with Heterospilus prosopidis used as the parasitoid. C. maculatus, in which few larvae survive competition to become adults in each bean, and C. phaseoli, in which many larvae become adults in each bean, along with two kinds of beans, the mung and the azuki, were combined to construct four (2 • 2) resourceherbivorous host-parasitoid systems that differed in local capacity and vulnerable period. The mung-C, maculatus system with the parasitoid was the most persistent, i.e., took the longest time for extinction of either the host or parasitoid to occur. Since this resource-herbivorous host combination exhibited the lowest local capacity and the shortest vulnerable period, these two conditions possibly promoted the persistence of the system. A model incorporating the host population structure supported the observed persistence. Furthermore, the possible contribution of the timing of densitydependent competition of the host on the host-parasitoid persistence is predicted.

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“…seed beetles), this is less evident and likely one of the reasons why it is rarely documented 18,19 . Seed beetles lay their eggs on the seed coat and upon hatching, larvae burrow inside the seed where they complete their development confined to this closed space 20 . The two most important factors that affect seed beetle performance and survival are the characteristics of the seed in which they develop and the natural enemies that attack them.…”

Section: Introductionmentioning

confidence: 99%

Host density and parasitoid presence interact and shape the outcome of a tritrophic interaction on seeds of wild lima bean

Cuny

Traine

Bustos‐Segura

et al. 2019

Sci Rep

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The interaction between the seed beetle Zabrotes subfasciatus and its parasitoid Stenocorse bruchivora, was investigated on seeds of two populations of wild lima bean, Phaseolus lunatus. By manipulating the number of beetle larvae per seed and the presence of parasitoids, we determined how factors related to beetle larvae density, the seed in which they feed and the parasitoid, may interact and affect host and parasitoid survival. Results showed that an increase in larval beetle density had a negative impact on beetle performance. This effect cascaded up to parasitoids, high larval density strongly reduced parasitoid emergence. Also, parasitoid presence resulted in faster beetle development and lower female weight. An interactive effect between larval host density and parasitoid presence affected the number of insects that emerged from the seeds. Beetle performance was better in the bean population with the largest seeds, while parasitoid emergence was the lowest in these seeds. This study shows that the impact of parasitoids on seed beetles is contingent on the interaction between density-mediated (direct mortality) and trait-mediated (e.g. non-consumptive) effects. Indirect trait-mediated effects of natural enemies are likely prevalent across insect communities, understanding their role in driving host-parasitoid interactions can have important implications for biological control.

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Contest and scramble competitions in two bruchid species, Callosobruchus analis andC. phaseoli (Coleoptera: Bruchidae)

Cited by 12 publications

References 17 publications

Experimental evidence for niche segregation in a sister species pair of non-biting midges

Experimental evidence for niche segregation in a sister species pair of non-biting midges

Temporal/spatial structure and the dynamical property of laboratory host‐parasitoid systems

Host density and parasitoid presence interact and shape the outcome of a tritrophic interaction on seeds of wild lima bean

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