Variation in the immune state of Gammarus pulex (Crustacea, Amphipoda) according to temperature: Are extreme temperatures a stress?

Labaude, Sophie; Moret, Yannick; Cézilly, Frank; Reuland, Charel; Rigaud, Thierry

doi:10.1016/j.dci.2017.05.013

Cited by 28 publications

(15 citation statements)

References 76 publications

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“…On the one hand, it may result from selection where individuals with the best somatic protection, involving high PO-activity, survived longer than those having poorer ones. On the other hand, high levels of PO activity at week 12 could also result from a deregulation of the host inflammatory response [69,70]. The impact of female reproductive effort on immunity seems limited, at least on the constitutive base levels of the immune parameters we have measured.…”

Section: Discussionmentioning

confidence: 92%

Sex-specific patterns of senescence in artificial insect populations varying in sex-ratio to manipulate reproductive effort

et al. 2020

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Background: The disposable soma theory of ageing assumes that organisms optimally trade-off limited resources between reproduction and longevity to maximize fitness. Early reproduction should especially trade-off against late reproduction and longevity because of reduced investment into somatic protection, including immunity. Moreover, as optimal reproductive strategies of males and females differ, sexually dimorphic patterns of senescence may evolve. In particular, as males gain fitness through mating success, sexual competition should be a major factor accelerating male senescence. In a single experiment, we examined these possibilities by establishing artificial populations of the mealworm beetle, Tenebrio molitor, in which we manipulated the sex-ratio to generate variable levels of investment into reproductive effort and sexual competition in males and females. Results: As predicted, variation in sex-ratio affected male and female reproductive efforts, with contrasted sexspecific trade-offs between lifetime reproduction, survival and immunity. High effort of reproduction accelerated mortality in females, without affecting immunity, but high early reproductive success was observed only in balanced sex-ratio condition. Male reproduction was costly on longevity and immunity, mainly because of their investment into copulations rather than in sexual competition. Conclusions:Our results suggest that T. molitor males, like females, maximize fitness through enhanced longevity, partly explaining their comparable longevity.

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Section: Discussionmentioning

confidence: 92%

Sex-specific patterns of senescence in artificial insect populations varying in sex-ratio to manipulate reproductive effort

et al. 2020

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“…Our study found that extreme heat can increase mortality due to nervous system diseases. Both experimental and epidemiological studies [40] have implied that extreme heat can affect the immune system, which plays an important role in the pathogenesis and progression of nervous system diseases such as Parkinson's disease [41]. Therefore, it was speculated that extreme heat could affect the nervous system.…”

Section: Discussionmentioning

confidence: 99%

Regional Temperature-Sensitive Diseases and Attributable Fractions in China

Cheng

Wang

et al. 2019

IJERPH

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Few studies have been carried out to systematically screen regional temperature-sensitive diseases. This study was aimed at systematically and comprehensively screening both high- and low-temperature-sensitive diseases by using mortality data from 17 study sites in China located in temperate and subtropical climate zones. The distributed lag nonlinear model (DLNM) was applied to quantify the association between extreme temperature and mortality to screen temperature-sensitive diseases from 18 kinds of diseases of eight disease systems. The attributable fractions (AFs) of sensitive diseases were calculated to assess the mortality burden attributable to high and low temperatures. A total of 1,380,713 records of all-cause deaths were involved. The results indicate that injuries, nervous, circulatory and respiratory diseases are sensitive to heat, with the attributable fraction accounting for 6.5%, 4.2%, 3.9% and 1.85%, respectively. Respiratory and circulatory diseases are sensitive to cold temperature, with the attributable fraction accounting for 13.3% and 11.8%, respectively. Most of the high- and low-temperature-sensitive diseases seem to have higher relative risk in study sites located in subtropical zones than in temperate zones. However, the attributable fractions for mortality of heat-related injuries were higher in temperate zones. The results of this research provide epidemiological evidence of the relative burden of mortality across two climate zones in China.

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“…For example, an increase in temperature variability can increase amphibian susceptibility to infection by parasites such as Batrachochytrium dendrobatidis (Raffel, Rohr, Kiesecker, & Hudson, ; Raffel et al, ; Rohr & Raffel, ). Similarly, in amphipods, the ability to clear bacterial infections was negatively affected when reared in low and high temperatures relative to intermediate temperatures (Labaude, Moret, Cézilly, Reuland, & Rigaud, ). While warming and variable warm temperatures have been shown to alter susceptibility to host–parasite interactions (Rumschlag, Boone, & Fellers, ), the effects of exposure to cold and variable cold temperatures on disease susceptibility are less understood (Cohen et al, ; Raffel et al, ; Rohr & Raffel, ).…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

The effects of different cold‐temperature regimes on development, growth, and susceptibility to an abiotic and biotic stressor

Wersebe

Blackwood

Guo

et al. 2019

Ecology and Evolution

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Global climate change is expected to both increase average temperatures as well as temperature variability. Increased average temperatures have led to earlier breeding in many spring‐breeding organisms. However, individuals breeding earlier will also face increased temperature fluctuations, including exposure to potentially harmful cold‐temperature regimes during early developmental stages. Using a model spring‐breeding amphibian, we investigated how embryonic exposure to different cold‐temperature regimes (control, cold‐pulse, and cold‐press) affected (a) compensatory larval development and growth, (b) larval susceptibility to a common contaminant, and (c) larval susceptibility to parasites. We found: (a) no evidence of compensatory development or growth, (b) larvae exposed to the cold‐press treatment were more susceptible to NaCl at 4‐days post‐hatching but recovered by 17‐days post‐hatching, and (c) larvae exposed to both cold treatments were less susceptible to parasites. These results demonstrate that variation in cold‐temperature regimes can lead to unique direct and indirect effects on larval growth, development, and response to stressors. This underscores the importance of considering cold‐temperature variability and not just increased average temperatures when examining the impacts of climate disruption.

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Variation in the immune state of Gammarus pulex (Crustacea, Amphipoda) according to temperature: Are extreme temperatures a stress?

Cited by 28 publications

References 76 publications

Sex-specific patterns of senescence in artificial insect populations varying in sex-ratio to manipulate reproductive effort

Sex-specific patterns of senescence in artificial insect populations varying in sex-ratio to manipulate reproductive effort

Regional Temperature-Sensitive Diseases and Attributable Fractions in China

The effects of different cold‐temperature regimes on development, growth, and susceptibility to an abiotic and biotic stressor

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