Detrimental impact of a heatwave on male reproductive behaviour and fertility

acta ethologica, Год журнала: 2023, Номер 27(1), С. 1 - 11

Опубликована: Окт. 24, 2023

Abstract Understanding how heatwaves impact on different aspects of mating behaviour and fertility is getting increasingly important. In this context, laboratory experiments involving manipulation exposure insects to thermal conditions are common procedures. To conduct such practical methods as dyes needed for an easy, non-invasive discrimination individuals. We report here a study measuring the effect extended heat stress applied males several parameters populations Drosophila subobscura derived from two distinct European locations. found highly detrimental effects heatwave behaviour—with longer (courtship copulation) latencies lower occurrence but no changes in duration—and fertility, with reduced fecundity reproductive success. Furthermore, we also tested efficacy food dye marker individual occurrence. While did not allow infer based transfer coloration male female, it affect attesting its utility has method discriminating individuals within context studies. Importantly, despite fact that was only males, observed females mated stressed by often refusing their nuptial feeding. This opens possibilities further integrated research female under scenarios.

Язык: Английский

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Duplicate genes as sources for rapid adaptive evolution of sperm under environmental pollution in tree sparrow

Molecular Ecology, Год журнала: 2022, Номер 32(7), С. 1673 - 1684

Опубликована: Дек. 26, 2022

Environmental pollution can result in poor sperm quality either directly or indirectly birds. However, adaptive and compensatory morphology changes motility improvements have rapidly evolved tree sparrows (Passer montanus) inhabiting polluted areas over the past 65 years. To identify genetic underpinnings of evolving phenotype, we carried out population genomics transcriptomics on sparrow populations two differently places. We identified a gene encoding serine/threonine protein kinase PIM1, which may drive rapid phenotypic evolution sperm. An unprecedented remarkable expansion PIM family, caused by tandem segmental duplication was subsequently observed genome. Most PIM1 duplicates showed testis-specific expression pattern, suggesting that their functions are related to male reproduction. Furthermore, elevated level consistent with our earlier findings longer faster swimming sites, indicating an important role for duplicated facilitating Our results suggest provides sources variation enable under environmental heavy metal pollution. The this study indicated genes be targets selection predominant adaptation change shed light stress.

Язык: Английский

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Effects of inbreeding and elevated rearing temperatures on strategic sperm production

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Фев. 7, 2024

Abstract Males often strategically modify their rate of sperm production based on the social context, but it remains unclear how environmental and genetic factors shape this plasticity. In freshwater ecosystems, high ambient temperatures lead to isolated pools hotter water in which inbreeding occurs. Higher can impair fish development, potentially disrupting production. We used guppies ( Poecilia reticulata ) investigate developmental temperature (26 °C or 30 °C) male status (inbred, outbred) influence absence presence a female (i.e., priming response). also tested if was affected by whether relative (sister), she inbred outbred. A higher rearing had no effect response. Inbred males produced significantly more an unrelated, outbred than when present. Conversely, did not alter response relatedness. addition, showed marginally greater exposed unrelated that rather inbred, difference versus related. Together, only increased female, depended her being This suggests stronger sexual selection allocate ejaculate resources, perhaps due benefits mating with females better condition.

Язык: Английский

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Temperature drives the divergent evolution of male harm to females

Опубликована: Март 12, 2024

Strong sexual selection promotes population viability and evolvability, but conflict can offset such benefits. Male harm adaptations leading to pre-copulatory (i.e. harassment) and/or copulatory traumatic insemination) females are taxonomically widespread, depress growth, affect the dynamics of adaptation evolutionary rescue, we largely ignore what factors modulate their evolution. Here, show that temperature drives divergent evolution male in Drosophila melanogaster, a model species study exhibits both intense harassment via seminal fluid proteins (SFPs). After 30 generations experimental wild flies under cold (20±4ºC), moderate (24±4ºC) hot (28±4ºC) thermal regimes mimicking natural conditions (average ± circadian range), characterized overall levels plasticity behaviours, as well proteome. Quick local was evidenced by higher at evolved (vs. non-evolved) temperatures. Furthermore, vs. mechanisms responded divergently temperature. substantially lower less plastic lines temperatures, while proteome warm temperatures differential expression SFPs. Such quick responses suggest high standing genetic variation origin. Accordingly, derived isogenic from ancestral strong quadratic GxE interactions for reproductive success across studied Our results suggest: a) be key understand past future (e.g. global warming) net effects on populations, b) fluctuations maintain traits, contributing resolve lek paradox.

Язык: Английский

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Predicting the Effects of Climate Change on the Fertility of Aquatic Animals Using a Meta‐Analytic Approach

Ecology Letters, Год журнала: 2024, Номер 28(1)

Опубликована: Дек. 31, 2024

Given that reproductive physiology is highly sensitive to thermal stress, there increasing concern about the effects of climate change on animal fertility. Even a slight reduction in fertility can have consequences for population growth and survival, so it critical better understand predict potential traits. We synthesised 1894 effect sizes across 276 studies 241 species examine aquatic animals. Our meta-analysis revealed external fertilisers tend be more vulnerable warming than internal fertilisers, especially freshwater species. also found increased temperature particularly detrimental gametes under certain conditions, female male fertility, challenging prevailing view males are vulnerable. This work provides valuable new insights into with viability.

Язык: Английский

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