Effects of ovarian fluid on sperm traits and its implications for cryptic female choice in zebrafish

Behavioral Ecology, Год журнала: 2019, Номер 30(5), С. 1298 - 1305

Опубликована: Май 1, 2019

Abstract In polyandrous mating systems, females maintain the opportunity to bias male fertilization success after in a process known as cryptic female choice. Mechanisms of choice have been described both internal and external fertilizers, may affect processes at different stages before, during, fertilization. substantial control over sperm storage fertilization, whereas is limited. A key factor proposed mediate fluid surrounding eggs, ovarian fluid, it directly performance. Here, we studied role post-mating sexual selection using zebrafish, Danio rerio. Firstly, assessed how affects swimming performance compared with freshwater. We focused on motility, velocity, trajectory, longevity, all traits associated competitive externally fertilizing fish. second step, used North Carolina II design explore female, male, x effects by testing motility 2 males total 11 blocks. Our results indicate that differently from Specifically, longevity were higher than freshwater, linearity beat cross frequency showed opposite pattern. Moreover, these varied according identities, supporting potential for mediated this species.

Язык: Английский

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Increased male investment in sperm competition results in reduced maintenance of gametes

PLoS Biology, Год журнала: 2023, Номер 21(4), С. e3002049 - e3002049

Опубликована: Апрель 4, 2023

Male animals often show higher mutation rates than their female conspecifics. A hypothesis for this male bias is that competition over fertilization of gametes leads to increased investment into reproduction at the expense maintenance and repair, resulting in a trade-off between success sperm offspring quality. Here, we provide evidence by harnessing power experimental evolution study effects sexual selection on germline seed beetle Callosobruchus maculatus. We first 50 generations under strong selection, coupled with removal natural resulted males are more successful competition. then these produce progeny lower quality if engaging sociosexual interactions prior being challenged surveil repair experimentally induced damage presence competitors alone can be enough elicit response. identify 18 candidate genes showed differential expression response damage, several previously implicated processes associated DNA cellular maintenance. These also significant changes across treatments fathers predicted reduction offspring, one gene strongly correlated success. Sex differences same indicate substantially While work needed detail exact molecular underpinnings our results, findings rare This suggests sex relative strengths causally linked bias. The tenet advocated here, allocation decisions an individual affect plasticity its genetic subsequent generations, has interesting implications mate choice processes.

Язык: Английский

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Age-dependent decline in sperm quality and function in a naturally short-lived vertebrate

BMC Ecology and Evolution, Год журнала: 2025, Номер 25(1)

Опубликована: Янв. 6, 2025

Abstract Maximizing the life-long reproductive output would lead to prediction that short-lived and fast aging species undergo no – if any senescence. Turquoise killifish ( Nothobranchius furzeri ) are naturally teleosts, extensive somatic aging, characterized by molecular, cellular, organ dysfunction following onset of sexual maturation. Here, we tested whether male turquoise maximize reproduction display minimal any, We analysed age-related changes in sperm traits, proportion fertilized eggs, as well embryo survival. Contrary expectation found males consisting age-dependent decline quality, decreased eggs lower Our results indicate do not trade-off soma with sustained fitness. Instead, appear occur simultaneously. findings question generalized vs. senescence models highlight importance integrating species-specific ecological demographic constraints explain observed life history traits.

Язык: Английский

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Experimental evidence for effects of sexual selection on condition-dependent mutation rates

Nature Ecology & Evolution, Год журнала: 2020, Номер 4(5), С. 737 - 744

Опубликована: Март 16, 2020

Язык: Английский

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The mating system affects the temperature sensitivity of male and female fertility

Functional Ecology, Год журнала: 2021, Номер 36(1), С. 92 - 106

Опубликована: Окт. 20, 2021

Abstract To mitigate the effects of climate change, it is important to understand species' responses increasing temperatures. This has often been done by studying survival or activity at temperature extremes. Before such extremes are reached, however, on fertility may already be apparent. Sex differences in thermal sensitivity (TSF) could impact species persistence under warming because female typically more limiting population growth than male fertility. However, little known about sex TSF. Here we first demonstrate that mating system can strongly influence TSF using seed beetle Callosobruchus maculatus . We exposed populations carrying artificially induced mutations two generations short‐term experimental evolution alternative systems, manipulating opportunity for natural and sexual selection mutations. then measured males females subjected juvenile adult heat stress. Populations kept had higher fitness, but similar TSF, compared control relaxed selection. males, strikingly, this difference increased over only evolving hypothesized an increase male‐induced harm during played a central role driving evolved difference, indeed, remating conditions harassment reduced both Moreover, show manipulation parameters C. generates intraspecific variation equal found among diverse set studies insects. Our study provides causal link between Sexual conflict, (re)mating rates genetic differ ecological settings, systems species. therefore also mechanistic understanding variability previously reported TSFs which inform future assays predictions warming. A free Plain Language Summary within Supporting Information article.

Язык: Английский

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Nongenetic paternal effects via seminal fluid

Evolution Letters, Год журнала: 2019, Номер 3(4), С. 403 - 411

Опубликована: Июль 8, 2019

Abstract Mounting evidence suggests that nongenetic paternal effects on offspring may be widespread among animal taxa, but the mechanisms underlying this form of inheritance are not yet fully understood. Here, we show seminal fluids underlie early survival in an insect, cricket Teleogryllus oceanicus, and quantify contribution effect to important fitness trait. We used castrated males within a full-sib half-sib experimental design fluid donors were responsible for variation developing embryos hatching, their subsequent adulthood. Increased expression two protein genes, previously found positively associated with sperm quality, was negatively embryo survival. These hold implications evolution adaptive maternal responses competition, more broadly interpretation sire from classic quantitative genetic breeding designs.

Язык: Английский

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Male sperm storage impairs sperm quality in the zebrafish

Scientific Reports, Год журнала: 2021, Номер 11(1)

Опубликована: Авг. 17, 2021

Abstract Variation in sperm traits is widely documented both at inter- and intraspecific level. However, vary also between ejaculates of the same male, due for example, to fluctuations female availability. Variability opportunities mate can indeed have important consequences traits, as it determines how often are used, thus rate which they produced long stored before mating. While being within males’ bodies, subjected ageing oxidative stress. Sperm storage may significantly impair quality, but evidence linking male variation still scarce. Here, we tested effect duration on within-male zebrafish, Danio rerio . We found that without mating opportunities, number increased increased, indicating continue be accumulate over time males discharged another way. Long (12 days) was associated with an overall impairment namely motility, longevity, DNA fragmentation, aged, their quality declined during storage. Our results confirm generate substantial phenotype, a source usually neglected should accounted experimental protocols aiming assay or maximise fertilization success.

Язык: Английский

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Strategic adjustment of ejaculate quality in response to variation of the socio-sexual environment

Behavioral Ecology and Sociobiology, Год журнала: 2021, Номер 75(6)

Опубликована: Май 14, 2021

Язык: Английский

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Heat stress reveals a fertility debt owing to postcopulatory sexual selection

Evolution Letters, Год журнала: 2023, Номер 8(1), С. 101 - 113

Опубликована: Март 16, 2023

Abstract Climates are changing rapidly, demanding equally rapid adaptation of natural populations. Whether sexual selection can aid such is under debate; while should promote when individuals with high mating success also best adapted to their local surroundings, the expression sexually selected traits incur costs. Here we asked what demographic consequences costs may be once climates change become harsher and strength increases. We first adopted a classic life history theory framework, incorporating trade-off between reproduction maintenance, applied it male germline generate formalized predictions for how an evolutionary strong postcopulatory (sperm competition) affect fertility acute adult heat stress. then tested these by assessing thermal sensitivity (TSF) in replicated lineages seed beetles maintained 68 generations three alternative regimes manipulating opportunity selection. In line theoretical predictions, find that males evolving suffer from increased TSF. Interestingly, females regime selection, who experienced relaxed on own reproductive effort, had benign settings but suffered TSF, like brothers. This implies female TSF evolved through genetic correlation males. Paternal not maternal stress reduced offspring no evidence adaptive transgenerational plasticity among heat-exposed offspring, indicating observed effects compound over generations. Our results suggest trade-offs increasing revealed harsh environments. put polyandrous species immediate risk during extreme waves expected future climate change.

Язык: Английский

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Sex segregation affects exploratory and social behaviors of zebrafish according to controlled housing conditions

Physiology & Behavior, Год журнала: 2020, Номер 222, С. 112944 - 112944

Опубликована: Май 11, 2020

Zebrafish has become an animal model in research and articles have established ideal conditions for their maintenance. However, little is known regarding the influence of gender other cues on zebrafish behavior. Thus, here we analyzed exploratory social behavior different sexes (male female, mixed or segregated) under housing with various types stimuli (visual or/and chemical structural environmental enrichment). Segregated females males were more active than individuals anxious. Fish that visualized smelled opposite sex presented higher activity less anxious only sex. segregated by while being allowed to visualize smell presence enrichment exhibited lower anxiety-like fish without enrichment. emphasized these variables should be taken into account detailed better replicability reproducibility experiments performed zebrafish.

Язык: Английский

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