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  1. Article: The Amelioration of Grazing through Physiological Integration by a Clonal Dune Plant.

    Evans, Jonathan P / Meckstroth, Shelby / Garai, Julie

    Plants (Basel, Switzerland)

    2023  Volume 12, Issue 4

    Abstract: Rhizomatous growth and associated physiological integration can allow a clonal dune species to potentially compensate for the selective removal of leaves associated with herbivory. ...

    Abstract Rhizomatous growth and associated physiological integration can allow a clonal dune species to potentially compensate for the selective removal of leaves associated with herbivory.
    Language English
    Publishing date 2023-02-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants12040724
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  2. Article: Testing for age-dependent effects of dietary restriction on the strength of condition dependence in ejaculate traits in the guppy (

    Evans, Jonathan P / Turnbull, Elizabeth J / Lymbery, Rowan A

    Royal Society open science

    2023  Volume 10, Issue 8, Page(s) 230805

    Abstract: Ejaculates can be costly to produce and depend on an individual's condition, defined as the pool of resources allocated to fitness. A method for assessing condition dependence is to manipulate resource availability and test for a reduction in trait ... ...

    Abstract Ejaculates can be costly to produce and depend on an individual's condition, defined as the pool of resources allocated to fitness. A method for assessing condition dependence is to manipulate resource availability and test for a reduction in trait expression. Here, we assess the effects of dietary restriction on two determinants of reproductive fitness in the guppy
    Language English
    Publishing date 2023-08-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2787755-3
    ISSN 2054-5703
    ISSN 2054-5703
    DOI 10.1098/rsos.230805
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  3. Article ; Online: Female reproductive fluids 'rescue' sperm from phenotypic ageing in an external fertilizer.

    Hadlow, Jessica H / Evans, Jonathan P / Lymbery, Rowan A

    Proceedings. Biological sciences

    2023  Volume 290, Issue 1999, Page(s) 20230574

    Abstract: Female reproductive fluids (FRFs) serve key reproductive functions in sexually reproducing animals, including modifying the way sperm swim and detect eggs, and influencing sperm lifespan. Despite the central role of FRF during fertilization, we know ... ...

    Abstract Female reproductive fluids (FRFs) serve key reproductive functions in sexually reproducing animals, including modifying the way sperm swim and detect eggs, and influencing sperm lifespan. Despite the central role of FRF during fertilization, we know surprisingly little about sperm-FRF interactions under different environmental conditions. Theory suggests that in external fertilizers FRF may 'rescue' sperm from ageing effects as they search to fertilize eggs. Here, we test the interaction between these two fundamental properties of the fertilization environment, ejaculate age (i.e. time since ejaculation) and FRF, on a range of functional sperm phenotypes in a broadcast spawning mussel,
    MeSH term(s) Male ; Female ; Animals ; Fertilizers ; Semen ; Sperm Motility ; Aging ; Gonadotropin-Releasing Hormone ; Spermatozoa ; Phenotype
    Chemical Substances Fertilizers ; Gonadotropin-Releasing Hormone (33515-09-2)
    Language English
    Publishing date 2023-05-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209242-6
    ISSN 1471-2954 ; 0080-4649 ; 0962-8452 ; 0950-1193
    ISSN (online) 1471-2954
    ISSN 0080-4649 ; 0962-8452 ; 0950-1193
    DOI 10.1098/rspb.2023.0574
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  4. Article ; Online: Paternal environment effects are driven by female reproductive fluid but not sperm age in an external fertilizer.

    Hadlow, Jessica H / Lymbery, Rowan A / Evans, Jonathan P

    Biology letters

    2023  Volume 19, Issue 11, Page(s) 20230368

    Abstract: Sperm ageing after ejaculation can generate paternal environment effects that impact offspring fitness. In many species, female reproductive fluids (FRFs), i.e. ancillary fluids released by eggs or within the female reproductive tract, may protect sperm ... ...

    Abstract Sperm ageing after ejaculation can generate paternal environment effects that impact offspring fitness. In many species, female reproductive fluids (FRFs), i.e. ancillary fluids released by eggs or within the female reproductive tract, may protect sperm from ageing and can additionally interact with sperm to influence offspring viability. This raises the intriguing prospect that FRFs may alleviate paternal effects associated with sperm ageing. Here, we test this novel hypothesis using the broadcast spawning mussel,
    MeSH term(s) Male ; Female ; Humans ; Fertilizers ; Paternal Inheritance ; Semen ; Spermatozoa/physiology ; Reproduction ; Fertilization
    Chemical Substances Fertilizers
    Language English
    Publishing date 2023-11-22
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2135022-X
    ISSN 1744-957X ; 1744-9561
    ISSN (online) 1744-957X
    ISSN 1744-9561
    DOI 10.1098/rsbl.2023.0368
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  5. Article ; Online: Ocean acidification alters sperm responses to egg-derived chemicals in a broadcast spawning mussel.

    Lymbery, Rowan A / Brouwer, Jill / Evans, Jonathan P

    Biology letters

    2022  Volume 18, Issue 4, Page(s) 20220042

    Abstract: The continued emissions of anthropogenic carbon dioxide are causing progressive ocean acidification (OA). While deleterious effects of OA on biological systems are well documented in the growth of calcifying organisms, lesser studied impacts of OA ... ...

    Abstract The continued emissions of anthropogenic carbon dioxide are causing progressive ocean acidification (OA). While deleterious effects of OA on biological systems are well documented in the growth of calcifying organisms, lesser studied impacts of OA include potential effects on gamete interactions that determine fertilization, which are likely to influence the many marine species that spawn gametes externally. Here, we explore the effects of OA on the signalling mechanisms that enable sperm to track egg-derived chemicals (sperm chemotaxis). We focus on the mussel
    MeSH term(s) Animals ; Female ; Hydrogen-Ion Concentration ; Male ; Mytilus/physiology ; Seawater/chemistry ; Sperm-Ovum Interactions ; Spermatozoa/physiology
    Language English
    Publishing date 2022-04-06
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2135022-X
    ISSN 1744-957X ; 1744-9561
    ISSN (online) 1744-957X
    ISSN 1744-9561
    DOI 10.1098/rsbl.2022.0042
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  6. Article: Density-dependent patterns of multivariate selection on sperm motility and morphology in a broadcast spawning mussel.

    Hadlow, Jessica H / Lymbery, Rowan A / Evans, Jonathan P

    Ecology and evolution

    2022  Volume 12, Issue 2, Page(s) e8514

    Abstract: Sperm cells exhibit extraordinary phenotypic variation, both among taxa and within individual species, yet our understanding of the adaptive value of sperm trait variation across multiple contexts is incomplete. For species without the opportunity to ... ...

    Abstract Sperm cells exhibit extraordinary phenotypic variation, both among taxa and within individual species, yet our understanding of the adaptive value of sperm trait variation across multiple contexts is incomplete. For species without the opportunity to choose mating partners, such as sessile broadcast spawning invertebrates, fertilization depends on gamete interactions, which in turn can be strongly influenced by local environmental conditions that alter the concentration of sperm and eggs. However, the way in which such environmental factors impact phenotypic selection on functional gamete traits remains unclear in most systems. Here, we analyze patterns of linear and nonlinear multivariate selection under experimentally altered local sperm densities (densities within the capture zone of eggs) on a range of functionally important sperm traits in the broadcast spawning marine mussel,
    Language English
    Publishing date 2022-02-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2635675-2
    ISSN 2045-7758
    ISSN 2045-7758
    DOI 10.1002/ece3.8514
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  7. Article ; Online: Sexual selection after gamete release in broadcast spawning invertebrates.

    Evans, Jonathan P / Lymbery, Rowan A

    Philosophical transactions of the Royal Society of London. Series B, Biological sciences

    2020  Volume 375, Issue 1813, Page(s) 20200069

    Abstract: Broadcast spawning invertebrates offer highly tractable models for evaluating sperm competition, gamete-level mate choice and sexual conflict. By displaying the ancestral mating strategy of external fertilization, where sexual selection is constrained to ...

    Abstract Broadcast spawning invertebrates offer highly tractable models for evaluating sperm competition, gamete-level mate choice and sexual conflict. By displaying the ancestral mating strategy of external fertilization, where sexual selection is constrained to act after gamete release, broadcast spawners also offer potential evolutionary insights into the cascade of events that led to sexual reproduction in more 'derived' groups (including humans). Moreover, the dynamic reproductive conditions faced by these animals mean that the strength and direction of sexual selection on both males and females can vary considerably. These attributes make broadcast spawning invertebrate systems uniquely suited to testing, extending, and sometimes challenging classic and contemporary ideas in sperm competition, many of which were first captured in Parker's seminal papers on the topic. Here, we provide a synthesis outlining progress in these fields, and highlight the burgeoning potential for broadcast spawners to provide both evolutionary and mechanistic understanding into gamete-level sexual selection more broadly across the animal kingdom. This article is part of the theme issue 'Fifty years of sperm competition'.
    MeSH term(s) Animals ; Fertilization ; Germ Cells/physiology ; Invertebrates/physiology ; Sexual Selection
    Language English
    Publishing date 2020-10-19
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 208382-6
    ISSN 1471-2970 ; 0080-4622 ; 0264-3839 ; 0962-8436
    ISSN (online) 1471-2970
    ISSN 0080-4622 ; 0264-3839 ; 0962-8436
    DOI 10.1098/rstb.2020.0069
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    Einzelsignatur: Show issues

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  8. Article: Personality, sperm traits and a test for their combined dependence on male condition in guppies.

    Galluccio, Edward / Lymbery, Rowan A / Wilson, Alastair / Evans, Jonathan P

    Royal Society open science

    2022  Volume 9, Issue 6, Page(s) 220269

    Abstract: There is evidence that animal personality can affect sexual selection, with studies reporting that male behavioural types are associated with success during pre- and post-copulatory sexual selection. Given these links between personality and sexual ... ...

    Abstract There is evidence that animal personality can affect sexual selection, with studies reporting that male behavioural types are associated with success during pre- and post-copulatory sexual selection. Given these links between personality and sexual traits, and the accumulating evidence that their expression can depend on an individual's dietary status (i.e. condition), a novel prediction is that changes in a male's diet should alter both the average expression of personality and sexual traits, and their covariance. We tested these predictions using the guppy
    Language English
    Publishing date 2022-06-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 2787755-3
    ISSN 2054-5703
    ISSN 2054-5703
    DOI 10.1098/rsos.220269
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  9. Article ; Online: Hemiarthroplasty or total elbow arthroplasty for unreconstructable distal humeral fractures in patients aged over 65 years : a systematic review and meta-analysis of patient outcomes and complications.

    Burden, Eleanor Grace / Batten, Timothy / Smith, Christopher / Evans, Jonathan P

    The bone & joint journal

    2022  Volume 104-B, Issue 5, Page(s) 559–566

    Abstract: Aims: Arthroplasty is being increasingly used for the management of distal humeral fractures (DHFs) in elderly patients. Arthroplasty options include total elbow arthroplasty (TEA) and hemiarthroplasty (HA); both have unique complications and there is ... ...

    Abstract Aims: Arthroplasty is being increasingly used for the management of distal humeral fractures (DHFs) in elderly patients. Arthroplasty options include total elbow arthroplasty (TEA) and hemiarthroplasty (HA); both have unique complications and there is not yet a consensus on which implant is superior. This systematic review asked: in patients aged over 65 years with unreconstructable DHFs, what differences are there in outcomes, as measured by patient-reported outcome measures (PROMs), range of motion (ROM), and complications, between distal humeral HA and TEA?
    Methods: A systematic review of the literature was performed via a search of MEDLINE and Embase. Two reviewers extracted data on PROMs, ROM, and complications. PROMs and ROM results were reported descriptively and a meta-analysis of complications was conducted. Quality of methodology was assessed using Wylde's non-summative four-point system. The study was registered with PROSPERO (CRD42021228329).
    Results: A total of 29 studies met the inclusion and exclusion criteria. The mean Disabilities of the Arm, Shoulder and Hand questionnaire (DASH) score was 19.6 (SD 7.5) for HA and 38 (SD 11.9) for TEA and the mean abbreviated version of DASH was 17.2 (SD 13.2) for HA and 24.9 (SD 4.8) for TEA. The Mayo Elbow Performance Score was the most commonly reported PROM across included studies, with a mean of 87 (SD 5.3) in HA and 88.3 (SD 5) in TEA. High complication rates were seen in both HA (22% (95% confidence interval (CI) 5 to 44)) and TEA (21% (95% CI 13 to 30), but no statistically significant difference identified.
    Conclusion: This systematic review has indicated PROMs and ROM mostly favouring HA, but with a similarly high complication rate in the two procedures. However, due to the small sample size and heterogeneity between studies, strength of evidence for these findings is low. We propose further research in the form of a national randomized controlled trial. Cite this article:
    MeSH term(s) Aged ; Arthroplasty, Replacement, Elbow ; Elbow/surgery ; Hemiarthroplasty/adverse effects ; Hemiarthroplasty/methods ; Humans ; Humeral Fractures/surgery ; Randomized Controlled Trials as Topic ; Treatment Outcome
    Language English
    Publishing date 2022-05-02
    Publishing country England
    Document type Journal Article ; Meta-Analysis ; Systematic Review
    ZDB-ID 2697156-2
    ISSN 2049-4408 ; 2049-4394
    ISSN (online) 2049-4408
    ISSN 2049-4394
    DOI 10.1302/0301-620X.104B5.BJJ-2021-1207.R2
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  10. Article ; Online: The thermal environment of sperm affects offspring success: a test of the anticipatory paternal effects hypothesis in the blue mussel.

    Lymbery, Rowan A / Kennington, W J / Evans, Jonathan P

    Biology letters

    2021  Volume 17, Issue 7, Page(s) 20210213

    Abstract: There has been an explosion of recent evidence that environments experienced by fathers or their ejaculates can influence offspring phenotypes (paternal effects). However, little is known about whether such effects are adaptive, which would have far- ... ...

    Abstract There has been an explosion of recent evidence that environments experienced by fathers or their ejaculates can influence offspring phenotypes (paternal effects). However, little is known about whether such effects are adaptive, which would have far-reaching implications for the many species facing rapidly changing environments. For example, some arguments suggest paternal effects might be a source of cross-generational plasticity, preparing offspring to face similar conditions to their father (anticipatory hypothesis). Alternatively, ejaculate-mediated effects on offspring may be non-adaptive by-products of stress. Here, we conduct an experiment to distinguish between these predictions, exposing ejaculates of the externally fertilizing mussel
    MeSH term(s) Animals ; Fertilization ; Male ; Mytilus edulis ; Paternal Inheritance ; Phenotype ; Spermatozoa
    Language English
    Publishing date 2021-07-07
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2135022-X
    ISSN 1744-957X ; 1744-9561
    ISSN (online) 1744-957X
    ISSN 1744-9561
    DOI 10.1098/rsbl.2021.0213
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