The evolution of centriole degradation in mouse sperm

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 2, 2024

Abstract Centrioles are subcellular organelles found at the cilia base with an evolutionarily conserved structure and a shock absorber-like function. In sperm, centrioles flagellum essential for embryo development in basal animals. Yet, sperm have evolved diverse forms, sometimes acting like transmission system, as cattle, becoming dispensable, house mice. How centriole to become dispensable some organisms is unclear. Here, we test hypothesis that this transition occurred through cascade of evolutionary changes proteins, structure, function was possibly driven by competition. We final steps associated change primary centriolar inner scaffold protein FAM161A rodents. This information provides first insight into molecular mechanisms adaptive evolution underlying major within internal mammalian neck.

Language: Английский

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Sperm competition and fertilization mode in fishes

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2020, Volume and Issue: 375(1813), P. 20200074 - 20200074

Published: Oct. 18, 2020

Sperm competition is a powerful selective force that has shaped sexual traits throughout animal evolution. Yet, how fertilization mode (i.e. external versus internal fertilization) influences the scope and potential for sperm to act on ejaculates remains unclear. Here, I examine shapes ejaculatory responses in fishes, diverse group constitute majority of vertebrate biological diversity. Fishes are an ideal this examination because they exhibit wide range reproductive behaviours unparalleled number transitions compared any other group. Drawing data from cartilaginous bony first show rates multiple paternity higher internally than externally fertilizing contrary prevailing expectation. then summarize acts quality highlighting where theoretical predictions differ between these groups. Differences respond modes most apparent when considering size swimming performance. Clarifying evolutionary will inform our understanding ejaculate evolution across tree life. This article part theme issue ‘Fifty years competition’.

Language: Английский

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Reviewing the genetic evidence for sex-biased dispersal in elasmobranchs

Reviews in Fish Biology and Fisheries, Journal Year: 2021, Volume and Issue: 31(4), P. 821 - 841

Published: July 27, 2021

Language: Английский

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Sexual selection and the evolution of sperm morphology in sharks

Journal of Evolutionary Biology, Journal Year: 2019, Volume and Issue: 32(10), P. 1027 - 1035

Published: June 28, 2019

Post-copulatory sexual selection, and sperm competition in particular, is a powerful selective force shaping the evolution of morphology. Although mounting evidence suggests that post-copulatory selection influences morphology among species, recent also variation at intraspecific level. However, contradictory empirical results limited taxonomic scope have led to difficulty assessing generality morphological responses strength competition. Here, we use phylogenetically controlled analyses explore effects on variance sharks, basal vertebrate group characterized by wide rates multiple mating females, consequently risk. Our reveal shark species experiencing greater levels produce with longer flagella flagellum length less variable under higher In contrast, neither head midpiece nor was associated findings demonstrate both inter- suggest an important target sharks. These provide insight into patterns ejaculate lineage.

Language: Английский

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Rapid decreases in relative testes mass among monogamous birds but not in other vertebrates

Ecology Letters, Journal Year: 2019, Volume and Issue: 23(2), P. 283 - 292

Published: Nov. 21, 2019

Larger testes produce more sperm and therefore improve reproductive success in the face of competition. Adaptation to social mating systems with relatively high low competition are likely have driven changes relative size opposing directions. Here, we combine largest vertebrate mass dataset ever collected phylogenetic approaches for measuring rates morphological evolution provide first quantitative evidence how has changed over time. We detect explosive radiations diversity distributed throughout tree life: bursts rapid change been frequent during evolutionary history. In socially monogamous birds, there repeated reductions mass. see no such pattern other vertebrates; prevalence monogamy birds may increased opportunities investment alternative behaviours physiologies allowing reduced expensive testes.

Language: Английский

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A phylogenetic comparative analysis on the evolution of sequential hermaphroditism in seabreams (Teleostei: Sparidae)

Scientific Reports, Journal Year: 2020, Volume and Issue: 10(1)

Published: Feb. 27, 2020

Abstract The Sparids are an ideal group of fishes in which to study the evolution sexual systems since they exhibit a great diversity, from gonochorism (separate sexes) protandrous (male-first) and protogynous (female-first) sequential hermaphroditism (sex change). According size-advantage model (SAM), selection should favour sex change when second achieves greater reproductive success at larger body size than first sex. Using phylogenetic comparative methods sample 68 sparid species, we show that protogyny protandry evolve but evolutionary transitions between these two forms unlikely happen. male gonadosomatic index (GSI) as measure investment gametes proxy for sperm competition, find that, while gonochoristic species support predictions SAM, do not, higher GSI values expected even after considering mating spawning modes. We suggest small males have invest disproportionally more production predicted not only aggregations, with high levels also pairs due need fertilize highly fecund females, much themselves. propose this compensatory mechanism, together Bateman’s principles hermaphrodites, be formally incorporated SAM.

Language: Английский

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Female sperm storage mediates post‐copulatory costs and benefits of ejaculate anticipatory plasticity in the guppy

Journal of Evolutionary Biology, Journal Year: 2020, Volume and Issue: 33(9), P. 1294 - 1305

Published: July 2, 2020

Males of many species evolved the capability adjusting their ejaculate phenotype in response to social cues match expected mating conditions. When females store sperm for a prolonged time, fitness return plastic adjustments may depend on interval between and fertilization. Although female storage (FSS) increases opportunity competition, as consequence longer temporal overlap ejaculates from several males, it also create variable selective forces phenotype, example by exposing trade-offs velocity survival. We evaluated relationship plasticity quality FSS guppy, Poecilia reticulata, polyandrous live-bearing fish which months where stored contribute significantly male's lifelong reproductive success. In this species, males respond perception future opportunities increasing quantity (number) (swimming velocity) ready-to-use (an anticipatory called 'sperm priming'). Here we investigated (a) effect priming vitro viability at stripping its decline (as an estimate survival), (b) vivo competitive fertilization success relation using artificial insemination. As expected, sperm-primed produced more numerous faster sperm, but with reduced after 4 hr, compared counterparts. Artificial insemination revealed that small (nonsignificant) advantage primed when immediately follows is reversed eggs are fertilized female-stored weeks By suggesting trade-off viability, these results demonstrate generates divergent selection pressures phenotype.

Language: Английский

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Biophysical Determinants and Constraints on Sperm Swimming Velocity

Cells, Journal Year: 2022, Volume and Issue: 11(21), P. 3360 - 3360

Published: Oct. 25, 2022

Over the last 50 years, sperm competition has become increasingly recognised as a potent evolutionary force shaping male ejaculate traits. One such trait is swimming speed, with faster associated increased fertilisation success in some species. Consequently, are often thought to have evolved be longer order facilitate movement. However, despite intrinsic appeal of this argument, operate different biophysical environment than we used to, and instead increasing length may not necessarily higher velocity. Here, test four predictive models (ConstantPower Density, Constant Speed, Power Transfer, Force) relationship between speed. We collated published data on morphology velocity from 141 animal species, tested for structural clustering then compared model predictions across all morphologically similar clusters. Within five morphological clusters sperm, did find significant positive total Instead, found evidence Speed model, which predicts that power output determined by flagellum so proportional length. Our results show (size, width) speed complex traditional do capture interactions involved. Future work therefore needs incorporate only better understanding how microfluid environment, but also importance fertilising i.e., internal external fertilisers. The microenvironment critical form

Language: Английский

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Social and physical environment independently affect oviposition decisions inDrosophila

Behavioral Ecology, Journal Year: 2021, Volume and Issue: 32(6), P. 1391 - 1399

Published: Sept. 8, 2021

Abstract In response to environmental stimuli, including variation in the presence of conspecifics, genotypes show highly plastic responses behavioral and physiological traits influencing reproduction. Although extensively documented males, such female are rather less studied. We expect females be responsive differentially allocate resources increase offspring fitness, given major contribution mothers number, size, developmental conditions. Using Drosophila melanogaster, we (a) manipulate exposure conspecific females, which could use anticipate number potential mates larval density, and; (b) test how this interacts with spatial distribution oviposition sites, from higher densities expected prefer clustered that can support a larger larvae. found high density were slower start copulating reduced their copulation duration, opposite effect observed males. There was parallel, perhaps related, on egg production: previously housed groups laid fewer eggs than those solitude. Resource patchiness also influenced behavior: preferred aggregated substrate, attracted more lay eggs. However, no interaction between prior housing conditions resource patchiness, indicating did not perceive value different distributions differently when exposed environments signal levels competition. that, although consexual competition changes copulatory behaviors has greater decisions.

Language: Английский

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A review of sperm storage methods and post-copulatory sexual selection in the Cephalopoda

Biological Journal of the Linnean Society, Journal Year: 2021, Volume and Issue: 134(2), P. 285 - 302

Published: June 19, 2021

Abstract In many animal phyla, females have a unique sperm storage organ (SSO). Post-copulatory sexual selection is powerful driving force of SSO evolution. SSOs are generally considered to evolved through antagonistic coevolution between male genitalia and the and/or cryptic female choice (CFC). cephalopods, transfer fertilization conducted complex processes, methods show inter-species variation. some species, males implant spermatangia superficially under skin, then released from transferred into seminal receptacle (SR). Deep-sea which lack SR, instead deep-implanting method by spermatangium embedded deep in musculature mantle wall female. stores whole within pocket. Because most species do not insert an intromittent when transferring sperm, evolution may been influenced CFC alone. This review summarizes mechanisms post-copulatory cephalopods it proposed that these diverse as adaptive selection.

Language: Английский

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