Alternative smooth or stepped altitudinal cline of fecundity in Drosophila teissieri and D. yakuba in the Ivory Coast.

Devaux, Janine; Lachaise, Daniel

doi:10.1266/jjg.63.43

Cited by 8 publications

(7 citation statements)

References 17 publications

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“…Female M. roeselii had higher levels of polyandry at higher latitudes, a pattern contrary to that seen in another nuptial-gift-giving insect, the green-veined white butterfly (Välimäki and Kaitala 2006, 2010; but see Devaux and Lachaise 1987). The pattern in our study could not be explained as an artifact of sampling date, because the bush-crickets were sampled from north to south; thus, those from northern latitudes were at an earlier stage of their mating season (some undeveloped nymphs still occurred at the time of collection in the north).…”

Section: Discussioncontrasting

confidence: 65%

On Variation of Polyandry in a Bush-Cricket,Metrioptera roeselii, in Northern Europe

Kaňuch

Kiehl

Low

et al. 2013

Journal of Insect Science

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Patterns of polyandry in nuptial-gift-giving insects are often explained in terms of sexually antagonistic coevolution. However, the potential influence of environmental constraints and life-history traits on polyandry in these species is still largely unexplored. As an initial step in examining the role of these factors, this study measured the number of matings (spermatodoses per female) of female Roesel's bush-crickets, Metrioptera roeselii Hagenbach (Orthoptera: Tettigoniidae), along a latitudinal gradient in northern Europe (16 sites, 53.89–60.47° N). Females contained between 0 and 5 spermatodoses (mean ± SE: 1.7 ± 0.08; N = 114), with the degree of polyandry generally increasing at higher latitudes (approximately 0.12–0.3 matings per degree of latitude). As expected, female body size also had an influence on polyandry; the number of matings increased from small to moderately large individuals before declining. The field-based results suggested that there were potentially interesting interactions between environment, life-history traits, and patterns of polyandry in nuptial-gift-giving insect species, and these potentially interesting interactions are used to outline future research directions.

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Section: Discussioncontrasting

confidence: 65%

On Variation of Polyandry in a Bush-Cricket,Metrioptera roeselii, in Northern Europe

Kaňuch

Kiehl

Low

et al. 2013

Journal of Insect Science

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“…Crosses between allopatric populations from high and low elevation, produce flies of intermediate fecundity, suggesting a genetic component to fecundity. Interestingly, a congeneric species, D. yakuba, displays rising fecundity with increasing altitude in a stepwise manner, perhaps linked to abrupt changes in the availability of particular habitat types (Devaux & Lachaise, 1987).…”

Section: (7 ) Fecunditymentioning

confidence: 99%

Terrestrial insects along elevation gradients: species and community responses to altitude

2005

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The literature on the response of insect species to the changing environments experienced along altitudinal gradients is diverse and widely dispersed. There is a growing awareness that such responses may serve as analogues for climate warming effects occurring at a particular fixed altitude or latitude over time. This review seeks, therefore, to synthesise information on the responses of insects and allied groups to increasing altitude and provide a platform for future research. It focuses on those functional aspects of insect biology that show positive or negative reaction to altitudinal changes but avoids emphasising adaptation to high altitude per se. Reactions can be direct, with insect characteristics or performance responding to changing environmental parameters, or they can be indirect and mediated through the insect's interaction with other organisms. These organisms include the host plant in the case of herbivorous insects, and also competitor species, specific parasitoids, predators and pathogens. The manner in which these various factors individually and collectively influence the morphology, behaviour, ecophysiology, growth and development, survival, reproduction, and spatial distribution of insect species is considered in detail. Resultant patterns in the abundance of individual species populations and of community species richness are examined. Attempts are made throughout to provide mechanistic explanations of trends and to place each topic, where appropriate, into the broader theoretical context by appropriate reference to key literature. The paper concludes by considering how montane insect species will respond to climate warming.

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“…Depending on geographical region, population or species, some studies have found that altitudinal clines exhibit opposite directionality (starvation resistance in D. buzzatii : Sørensen et al ., vs. Sarup & Loeschcke, ; fecundity in D. yakuba vs. D. teissieri : Devaux & Lachaise, ). Others have failed to find clear altitudinal clines altogether: Bubliy & Loeschcke () measured eight traits across an elevational transect in D. buzzatii and D. simulans but did not find clinality.…”

Section: Introductionmentioning

confidence: 99%

Spatially varying selection shapes life history clines among populations of Drosophila melanogaster from sub‐Saharan Africa

Fabian¹,

Lack

Mathur

et al. 2015

J of Evolutionary Biology

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Clines in life history traits, presumably driven by spatially varying selection, are widespread. Major latitudinal clines have been observed, for example, in Drosophila melanogaster, an ancestrally tropical insect from Africa that has colonized temperate habitats on multiple continents. Yet, how geographic factors other than latitude, such as altitude or longitude, affect life history in this species remains poorly understood. Moreover, most previous work has been performed on derived European, American and Australian populations, but whether life history also varies predictably with geography in the ancestral Afro-tropical range has not been investigated systematically. Here, we have examined life history variation among populations of D. melanogaster from sub-Saharan Africa. Viability and reproductive diapause did not vary with geography, but body size increased with altitude, latitude and longitude. Early fecundity covaried positively with altitude and latitude, whereas lifespan showed the opposite trend. Examination of genetic variance-covariance matrices revealed geographic differentiation also in trade-off structure, and QST-FST analysis showed that life history differentiation among populations is likely shaped by selection. Together, our results suggest that geographic and/or climatic factors drive adaptive phenotypic differentiation among ancestral African populations and confirm the widely held notion that latitude and altitude represent parallel gradients.

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Alternative smooth or stepped altitudinal cline of fecundity in Drosophila teissieri and D. yakuba in the Ivory Coast.

Abstract: Drosophilateissieri and D. yakuba are two closely related species within the melanogaster species subgroup.

Cited by 8 publications

References 17 publications

On Variation of Polyandry in a Bush-Cricket,Metrioptera roeselii, in Northern Europe

On Variation of Polyandry in a Bush-Cricket,Metrioptera roeselii, in Northern Europe

Terrestrial insects along elevation gradients: species and community responses to altitude

Spatially varying selection shapes life history clines among populations of Drosophila melanogaster from sub‐Saharan Africa

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