| surface tension dominates insect flight on fluid interfaces. | flight on the 2d air-water interface, with body weight supported by surface tension, is a unique locomotion strategy well adapted for the environmental niche on the surface of water. although previously described in aquatic insects like stoneflies, the biomechanics of interfacial flight has never been analysed. here, we report interfacial flight as an adapted behaviour in waterlily beetles (galerucella nymphaeae) which are also dexterous airborne fliers. we present the first quantitative biomech ... | 2016 | 26936640 |
| attachment of galerucella nymphaeae (coleoptera, chrysomelidae) to surfaces with different surface energy. | numerous studies deal with insect attachment onto surfaces with different roughness; however, little is known about insect attachment onto surfaces that have different chemistry. in the present study, we describe the attachment structures of the water-lily leaf beetle galerucella nymphaeae and test the hypothesis that the larval and adult stages generate the strongest attachment on surfaces with contact angles that are similar to those of leaves of their host plants. the larvae bear a smooth att ... | 2014 | 25324345 |
| differences in preference and performance of the water lily leaf beetle, galerucella nymphaeae populations on native and introduced aquatic plants. | plant invasions represent ecological opportunities for herbivorous insects able to exploit novel host plants. the availability of new hosts and rapid adaptations may lead to host race formation and ultimately speciation. we studied potential host race formation in the water lily leaf beetle, galerucella nymphaeae, in response to invasion by water chestnut, trapa natans, in eastern north america. this leaf beetle is well suited for such studies because previous work showed that different herbivor ... | 2009 | 20021761 |
| ecological modulation of environmental stress: interactions between ultraviolet radiation, epibiotic snail embryos, plants and herbivores. | 1. the distribution of egg masses of the freshwater snails lymnaea stagnalis and planorbarius corneus on the undersides of water lily leaves (e.g. nuphar lutea) is related to the prevalence of the leaf-mining beetle galerucella nymphaeae. 2. when given the choice, planorbarius significantly avoids leaves that were infested by the mining beetle. conversely, lymnaea did not discriminate against mined leaves. 3. intact nuphar leaves block over 95% of incident ultraviolet radiation. yet, ultraviolet ... | 2008 | 18217942 |
| genetically based polymorphisms in morphology and life history associated with putative host races of the water lily leaf beetle, galerucella nymphaeae. | a host race is a population that is partially reproductively isolated from other conspecific populations as a direct consequence of adaptation to a specific host. the initial step in host race formation is the establishment of genetically based polymorphisms in, for example, morphology, preference, or performance. in this study we investigated whether polymorphisms observed in galerucella nymphaeae have a genetic component. galerucella nymphaeae, the water lily leaf beetle, is a herbivore which ... | 2002 | 12353754 |
| host preference and larval performance suggest host race formation in galerucella nymphaeae. | in this study we investigated the possibilities for host race formation in galerucella nymphaeae. this is a chrysomelid beetle feeding on four different hosts, belonging to two different plant families, the nymphaeaceae and polygonaceae. previous results showed that beetles living on the two different host families differ in morphology, i.e., body length, mandibular width, and color of the elytra. in the current study, the preference of g. nymphaeae for four hosts was investigated, together with ... | 2002 | 28547051 |
| a field test of inducible resistance to specialist and generalist herbivores using the water lily nuphar luteum. | we tested whether grazing by the specialist beetle galerucella nymphaeae (coleoptera: chrysomelidae) induced resistance to herbivory in the water lily nuphar luteum macrophyllum (nymphaeaceae) using both the specialist beetle and the generalist crayfish procambarus clarkii (decapoda: cambaridae). for 2 months, we allowed natural densities of beetles to develop on control plants of nuphar, while removing beetles every 2-3 days from adjacent plants that were paired by location within our field sit ... | 1998 | 28308519 |
| do female leaf beetles galerucella nymphaeae choose their mates and does it matter? | the role of active female choice in sexual selection is frequently difficult to ascertain, and this is particularly the case for many insect species. also, it is uncertain whether choosing between males would affect offspring viability. we designed an experiment to investigate the presence of female choice in a coleoptera species (galerucella nymphaeae). we also estimated whether mate choice would have any effect on offspring performance. females were first placed with two males in a test arena ... | 1998 | 28307551 |
| female's preference for oviposition site and larval performance in the water-lily beetle, galerucella nymphaeae (coleoptera: chrysomelidae). | water-lily beetles prefer younger rather than older water-lily leaves as oviposition sites. by the time of hatching, however, young leaves have aged consieerably. larval performance of the water-lily beetle was measured on different types of leaves of the yellow water-lily and compared with oviposition preference of females. the leaf types used in the experiments were categorized as (i) young, (ii) natal (medium-aged) and (iii) old. the natal leaves were the ones on which larvae from a particula ... | 1993 | 28313772 |
| egg and larval load assessment and its influence on oviposition behaviour of the leaf beetle galerucella nymphaeae. | the oviposition behaviour of the water-lily beetle galerucella nymphaeae was examined. this species is a specialist herbivore on the floating leaves of nymphaeids nymphaeaceae and especially on the yellow water-lily, nuphar lutea. females lay their eggs in clutches on the leaves, and after hatching, the larvae feed on the leaves. the quality of the leaves decreases quickly after the larvae hatch, and eventually the leaves will sink below the water surface, whereupon the eggs, 1st-instar larvae a ... | 1993 | 28313771 |
| small-scale distributional dynamics of the yellow water-lily and its herbivore galerucella nymphaeae (coleoptera: chrysomelidae). | i followed the within-generation distribution of a chewing specialist herbivore, the water-lily beetle, on individually marked leaves of the yellow water-lily. yellow water-lilies produced new leaves steadily throughout the growth season. average leaf longevity was 3-4 weeks, much shorter than the developmental time of the beetle. the average egg-load of leaves was about 120. leaf longevity was independent of egg density, but migration rate of the first instar larvae was density-dependent. beetl ... | 1991 | 28312730 |
| galerucella nymphaeae (col., chrysomelidae) grazing increases nuphar leaf production and affects carbon and nitrogen dynamics in ponds. | the grazing effects of the waterlily beetle galerucella nymphaeae on nuphar lutea stands were studied in three ponds in central finland. production of floating leaves of n. lutea and growth in the g. nymphaeae population were investigated in the ponds and bioenergetics of the beetle larvae in the laboratory. combination of field and laboratory data enabled estimation of the effect of the beetle on the production of floating leaves of n. lutea and the consequences of grazing for the input of detr ... | 1991 | 28313198 |