Adaptive behaviour of Drosophila adults in relation to temperature and humidity

Prince, GJ; Pa, Parsons

doi:10.1071/zo9770285

Cited by 41 publications

(28 citation statements)

References 14 publications

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“…1). These survey data were in accord with a variety of laboratory experiments which consistently have suggested a higher fitness of D. melanogaster over D. simulans at high temperatures and vice versa (e.g., Prince & Parsons, 1977;Tantawy & Mallah, 1961;Tantawy & Soliman, 1967). However, whether the distributional differences between the sibling species in the field were indeed due to a greater temperature dependence of D. melanogaster needs further investigation.…”

Section: Species Numbers and Ratiosupporting

confidence: 70%

Temporal variation of Drosophila melanogaster Adh allele frequencies, inversion freqencies, and population sizes

Knibb

1986

Genetica

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The frequencies of cosmopolitan inversions and of Adh alleles in D. melanogaster, and population sizes of D. melanogaster and D. simulans have been monitored for two years in seven south-eastern Queensland sites. D. melanogaster population sizes showed greater 'summer' increases and 'winter' decreases than those of 19. simulans. Adh allele frequencies showed no seasonal or yearly variation, and no significant correlations with environmental variables after accounting for linkage disequilibrium with In(2L)t. Some inversion frequencies showed regular 'summer' to 'winter' declines, yearly variation, and significant correlations with population size. Thus, the temporal variation of some inversion frequencies, unlike that for Adh allele frequencies, paralleled previously reported frequency variation over latitude.

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Section: Species Numbers and Ratiosupporting

confidence: 70%

Temporal variation of Drosophila melanogaster Adh allele frequencies, inversion freqencies, and population sizes

Knibb

1986

Genetica

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“…Here, the same synergetic-like phenomena was observed. Prince & Parsons (1977) showed that under low RH, D. melanogaster adults move towards lower temperatures likely to mitigate water loss. It is reasonable to speculate that in natural conditions, SWD adults also tend to avoid heat stress and low RH by searching for protected and favorable microhabitats, but this remains to be tested.…”

Section: Discussionmentioning

confidence: 99%

Basal tolerance to heat and cold exposure of the spotted wing drosophila,Drosophila suzukii

Enriquez

Colinet

2017

PeerJ

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The spotted wing Drosophila, Drosophila suzukii, is a new pest in Europe and America which causes severe damages, mostly to stone fruit crops. Temperature and humidity are among the most important abiotic factors governing insect development and fitness. In many situations, temperature can become stressful thus compromising survival. The ability to cope with thermal stress depends on basal level of thermal tolerance. Basic knowledge on temperature-dependent mortality of D. suzukii is essential to facilitate management of this pest. The objective of the present study was to investigate D. suzukii basal cold and heat tolerance. Adults and pupae were subjected to six low temperatures (−5–7.5 °C) and seven high temperatures (30–37 °C) for various durations, and survival-time-temperature relationships were investigated. Data showed that males were globally more cold tolerant than females. At temperature above 5 °C, adult cold mortality became minor even after prolonged exposures (e.g., only 20% mortality after one month at 7.5 °C). Heat tolerance of males was lower than that of females at the highest tested temperatures (34, 35 and 37 °C). Pupae appeared much less cold tolerant than adults at all temperatures (e.g., Lt50 at 5° C: 4–5 d for adults vs. 21 h for pupae). Pupae were more heat tolerant than adults at the most extreme high temperatures (e.g., Lt50 at 37 °C: 30 min for adults vs. 4 h for pupae). The pupal thermal tolerance was further investigated under low vs. high humidity. Low relative humidity did not affect pupal cold survival, but it reduced survival under heat stress. Overall, this study shows that survival of D. suzukii under heat and cold conditions can vary with stress intensity, duration, humidity, sex and stage, and the methodological approach used here, which was based on thermal tolerance landscapes, provides a comprehensive description of D. suzukiithermal tolerance and limits.

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“…Humidity can have an overriding effect on position in a gradient (46). On the other hand, humidity may not affect temperature preference of well-hydrated animals (35, 69,216), but desiccated individuals often seek lower temperatures even at high humidity (69,193). The effect of acclimation temperature is variable.…”

Section: Thermal Preferencementioning

confidence: 97%

“…Many insects can be "trapped" by wandering into regions so cold that movement is inhibited, and often peaks of distribution appear in gradients fo r this reason (35), or apparent preference may shift downward over time (193). Preference distri butions often show a long tail on the cold side, contrasting with a very abrupt cut-off on the high side (35, 62,70).…”

Section: Thermal Preferencementioning

confidence: 99%