Developmental diet irreversibly shapes male post‐copulatory traits in the neriid fly <i>Telostylinus angusticollis</i>

Macartney, Erin L.; Nicovich, Philip R.; Bonduriansky, Russell; Crean, Angela J.

doi:10.1111/jeb.13384

Cited by 17 publications

(13 citation statements)

References 65 publications

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“…Even within taxonomic groups, there are inconsistencies in the types of traits that are measured, and the types of diet manipulations applied. For example, in arthropods, very few studies have examined condition dependence of sperm movement (but see Macartney et al, 2018b) and we did not find any studies that manipulated male condition by reducing carbohydrates. In mammals, we did not find any studies that measured sperm length.…”

Section: (4) Publication Bias and Gaps In The Literaturementioning

confidence: 62%

“…Therefore, while many ejaculate traits are expected to co‐vary with body size (e.g. Gage, ; Locatello et al, ; O'Dea et al, ; Macartney et al, ) these results suggest that body size and ejaculate traits respond somewhat differently to nutrient limitation, and that the condition dependence of ejaculate traits is weak compared to the condition dependence of body size.…”

Section: Discussionmentioning

confidence: 99%

“…While we do not have a priori predictions of how most ejaculate traits should scale with body size, some ejaculate traits (such as testes size and therefore sperm quantity) are usually correlated with body size (e.g. Locatello et al, 2008;O'Dea, Jennions, & Head, 2014;Macartney et al, 2018b; but see Mautz, Møller, & Jennions, 2013). We therefore conducted parallel analyses of treatment effects on ejaculate traits and on body size, allowing us to compare the degree of condition dependence in ejaculate traits with the degree of condition dependence in overall growth.…”

Section: (4) Systematically Reviewing Ejaculate Condition Dependencementioning

confidence: 99%

“…For example, holometabolous insects rely on developmental nutrient acquisition for investment in adult reproductive traits (Boggs, ), including ejaculate traits (e.g. Dávila & Aron, ; Macartney et al, ). However, there has been no systematic assessment of how male ejaculate traits respond to nutrient limitation at different ontogenetic stages, or how these effects differ among taxa.…”

Section: Introductionmentioning

confidence: 99%

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Effects of nutrient limitation on sperm and seminal fluid: a systematic review and meta‐analysis

et al. 2019

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Theory predicts that costly sexual traits should be reduced when individuals are in poor condition (i.e. traits should exhibit condition‐dependent expression). It is therefore widely expected that male ejaculate traits, such as sperm and seminal fluid, will exhibit reduced quantity and quality when dietary nutrients are limited. However, reported patterns of ejaculate condition dependence are highly variable, and there has been no comprehensive synthesis of underlying sources of such variation in condition‐dependent responses. In particular, it remains unclear whether all ejaculate traits are equally sensitive to nutrient intake, and whether such traits are particularly sensitive to certain dietary nutrients, respond more strongly to nutrients during specific life stages, or respond more strongly in some taxonomic groups. We systematically reviewed these potential sources of variation through a meta‐analysis across 50 species of arthropods and vertebrates (from 71 papers and 348 effect sizes). We found that overall, ejaculate traits are moderately reduced when dietary nutrients are limited, but we also detected substantial variation in responses. Seminal fluid quantity was strongly and consistently condition dependent, while sperm quantity was moderately condition dependent. By contrast, aspects of sperm quality (particularly sperm viability and morphology) were less consistently reduced under nutrient limitation. Ejaculate traits tended to respond in a condition‐dependent manner to a wide range of dietary manipulations, especially to caloric and protein restriction. Finally, while all major taxa for which sufficient data exist (i.e. arthropods, mammals, fish) showed condition dependence of ejaculate traits, we detected some taxonomic differences in the life stage that is most sensitive to nutrient limitation, and in the degree of condition dependence of specific ejaculate traits. Together, these biologically relevant factors accounted for nearly 20% of the total variance in ejaculate responses to nutrient limitation. Interestingly, body size showed considerably stronger condition‐dependent responses compared to ejaculate traits, suggesting that ejaculate trait expression may be strongly canalised to protect important reproductive functions, or that the cost of producing an ejaculate is relatively low. Taken together, our findings show that condition‐dependence of ejaculate traits is taxonomically widespread, but there are also many interesting, biologically relevant sources of variation that require further investigation. In particular, further research is needed to understand the differences in selective pressures that result in differential patterns of ejaculate condition dependence across taxa and ejaculate traits.

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Section: (4) Publication Bias and Gaps In The Literaturementioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Section: (4) Systematically Reviewing Ejaculate Condition Dependencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of nutrient limitation on sperm and seminal fluid: a systematic review and meta‐analysis

et al. 2019

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“…While the cost of SSCs used in courtship has been well documented for traits shaped by precopulatory sexual selection (e.g., Cotton et al, 2004Cotton et al, , 2006, this is not the case for traits shaped by postcopulatory sexual selection (i.e., behaviors related with copulatory courtship). Overall, it should be noted that there is some evidence of costs for postcopulatory traits (e.g., characteristics of the ejaculate, Cordes et al, 2015;Macartney et al, 2018;Vrech et al, 2019), but the costs of courtship traits that qualify as postcopulatory SSCs have only been proposed (Eberhard, 1996).…”

mentioning

confidence: 99%

Condition‐dependent male copulatory courtship and its benefits for females

Cargnelutti

Ramírez²,

Cristancho

et al. 2021

Ecology and Evolution

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Sexual selection is responsible for the development of highly elaborated traits, known as secondary sexual characters (SSCs) (Andersson, 1994;Cotton et al., 2006; Darwin, 1871). These SSCs are used during courtship to persuade and stimulate females to mate using visual, auditory, tactile, and/or chemical signals (Andersson, 1994;Eberhard, 1996;Mitoyen et al., 2019). Theory indicates that these SSCs are used by females as indicators of male quality (Cotton et al., 2004;Grafen, 1990;Zahavi, 1975). The fundamental idea is that the cost of producing and maintaining SSCs depends directly on the condition of males, which can be defined as

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Frequent mating reduces male mating rate but not offspring quality or quantity in a neriid fly

2020

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Developmental diet irreversibly shapes male post‐copulatory traits in the neriid fly Telostylinus angusticollis

Cited by 17 publications

References 65 publications

Effects of nutrient limitation on sperm and seminal fluid: a systematic review and meta‐analysis

Effects of nutrient limitation on sperm and seminal fluid: a systematic review and meta‐analysis

Condition‐dependent male copulatory courtship and its benefits for females

Frequent mating reduces male mating rate but not offspring quality or quantity in a neriid fly

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