Interaction-Independent Sexual Selection and the Mechanisms of Sexual Selection

Murphy, Christopher G.

doi:10.1111/j.1558-5646.1998.tb05133.x

Cited by 52 publications

(34 citation statements)

References 56 publications

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“…Some authors have suggested that the sedentary nature of flowering plants makes the competition for pollinators unlike the competition for mates among animals (e.g., Grant 1995;Murphy 1998). Here, we reinforce that the competition over mates and the competition for pollinator visits can exemplify the same fundamental selection pressure.…”

Section: Discussionsupporting

confidence: 66%

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A theory for exaggerated secondary sexual traits in animal-pollinated plants

Biernaskie

Elle

2006

Evol Ecol

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We analyze two mathematical models of adaptive investment in rewarding plant traits. In both models, the attractiveness of a particular trait value declines as the mean value in the population increases (asymmetric competition), giving relatively rewarding traits a competitive advantage. Including this competition for pollinator visits in a standard model of hermaphroditic sex allocation shifts additional allocation to pollinator rewards at the expense of allocation to pollen and seeds. In the second model, plants can invest additional resources in pollinator rewards but suffer reduced viability and rising costs due to excess pollen removal and within-plant selfing (geitonogamy). Despite these accumulating costs, increasing the magnitude of asymmetric competition exaggerates the ESS investment in rewards beyond the equilibrium in cases where attractiveness depends only on a plant's absolute reward value. We suggest that the type of frequency dependent selection modeled here is fundamentally equivalent to sexual selection in animal populations (with some unique exceptions). Testing the main assumptions of our models may reveal whether seemingly ''extravagant'' floral traits are strictly analogous to the exaggerated secondary sexual traits of animals.

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Section: Discussionsupporting

confidence: 66%

“…For some, the theory encompasses any trait with a positive influence on mating success (e.g. Murphy 1998)-a viewpoint that is particularly apparent in the application of sexual selection theory to flowering plants. Sexual selection in plants is typically defined as selection arising from differences in mating success (e.g.…”

Section: Introductionmentioning

confidence: 99%

A theory for exaggerated secondary sexual traits in animal-pollinated plants

Biernaskie

Elle

2006

Evol Ecol

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“…pollen export and import) relative to conspecifics (cf. interaction-independent sexual selection, Murphy 1998). Sexual selection in plants can also take place after fertilization, when sex-limited expression of traits influence allocation to developing fertilized ovules (Queller 1984).…”

Section: Sexual Selection and Sexual Conflict In Plantsmentioning

confidence: 99%

Using theories of sexual selection and sexual conflict to improve our understanding of plant ecology and evolution

Lankinen

Green

2015

AoB PLANTS

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Sexual selection and sexual conflict theories that explain evolution of sexual behaviour are often an integral part of animal studies investigating diverse research questions, e.g. in behaviour, ecology, physiology and immunology. In plants, however, relatively few studies investigate sexual selection and sexual conflict. In this review we discuss how taking these theories into account can be useful not only for our understanding of plant reproductive strategies but also in related research areas, including i) mechanisms of pollen-pistil interactions, ii) mating-system evolution in hermaphrodites and iii) plant immune responses to pests and pathogens.

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“…In polygynous mammalian mating strategies, body size is often a key state influencing male-male competitiveness, endurance rivalry, and reproductive success (Andersson 1994;Murphy 1998). In young growing animals, body size increases with age, allowing individuals to become more competitive (Clutton-Brock et al 1979).…”

Section: Introductionmentioning

confidence: 99%

Longitudinal changes and consistency in male physical and behavioural traits have implications for mating success in the grey seal (Halichoerus grypus)

2012

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We examined age-related changes and consistency in physical and behavioural traits of 20 male grey seals (Halichoerus grypus (Fabricius, 1791)) and implications for a proxy of mating success (number of oestrous females attended) over four successive breeding seasons on Sable Island, Canada. Across the study, young males (10-15 years) gained body mass, while old males (23-31 years) lost body mass. Body length was an important determinant of tenure (time spent at a site among females) and males of all ages exhibited a high level of consistency in duration of tenure (r = 0.40-0.50). In young males, our proxy of success showed a strong relationship with arrival body mass and also exhibited a high level of consistency (r = 0.50). None of the physical traits measured explained variation in success by exhibiting mating tactics that did not involve tenure, which is likely due to the opportunistic nature of those tactics. Whereas young male grey seals exhibited age-dependent improvements in success owing to changes in their physical state, later in life physical traits were less influential and suggest that nonphysical traits may compensate for a deteriorating physical state and its impact on male success.Résumé : Nous avons examiné les changements associés à l'âge et la cohérence des caractères physiques et comportementaux de 20 phoques gris mâles (Halichoerus grypus (Fabricius, 1791)) et leur signification en ce qui concerne une variable substitutive du succès d'accouplement (le nombre de femelles en oestrus accouplées) pendant quatre saisons de reproduction successives dans l'île de Sable (Canada). Durant l'étude, la masse corporelle des jeunes mâles (de 10 à 15 ans) a augmenté alors que celle des vieux mâles (de 23 à 31 ans) a diminué. La longueur du corps était un important déterminant de la rési-dence (le temps passé en un lieu parmi des femelles) et les mâles de tout âge présentaient un degré élevé de cohérence relativement à la durée de la résidence (r = 0,40 à 0,50). Chez les jeunes mâles, notre variable substitutive de succès présentait un fort lien avec la masse corporelle à l'arrivée ainsi qu'un degré de cohérence élevé (r = 0,50). Aucun des caractères physiques mesurés n'explique les variations du succès découlant de tactiques d'accouplement ne comprenant pas la résidence, ce qui est probablement attribuable au caractère opportuniste de ces tactiques. Si les jeunes phoques gris présentent des améliorations du succès qui dépendent de l'âge en raison de changements à leur état physique, l'incidence des caractères physiques est moins importante à des âges plus avancés, ce qui porte à croire que des caractères non physiques pourraient compenser la détérioration de l'état physique et son impact sur le succès des mâles.

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Interaction-Independent Sexual Selection and the Mechanisms of Sexual Selection

Cited by 52 publications

References 56 publications

A theory for exaggerated secondary sexual traits in animal-pollinated plants

A theory for exaggerated secondary sexual traits in animal-pollinated plants

Using theories of sexual selection and sexual conflict to improve our understanding of plant ecology and evolution

Longitudinal changes and consistency in male physical and behavioural traits have implications for mating success in the grey seal (Halichoerus grypus)

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