Copulation Calls in Male Formosan Macaques: Honest Signals of Male Quality?

2002 ◽  
Vol 73 (4) ◽  
pp. 220-223 ◽  
Author(s):  
Minna J. Hsu ◽  
Jin-Fu Lin ◽  
Li-Ming Chen ◽  
Govindasamy Agoramoorthy
Keyword(s):  
Male Quality ◽  
Honest Signals

Communication of Male Quality in Owl Hoots

2007 ◽  
Vol 169 (4) ◽  
pp. 552
Author(s):  
Loïc A. Hardouin ◽  
Reby ◽  
Bavoux ◽  
Burneleau ◽  
Bretagnolle
Keyword(s):  
Male Quality

Duchenne Smiles as Honest Signals of Chronic Positive Mood

2021 ◽  
pp. 174569162095983
Author(s):  
Kennon M. Sheldon ◽  
Mike Corcoran ◽  
Melanie Sheldon
Keyword(s):  
Positive Emotion ◽  
Positive Mood ◽  
Honest Signal ◽  
Happy People ◽  
Honest Signals ◽  
Neutral Mood ◽  
Duchenne Smiles ◽  
Positivity Offset ◽  
Behavioral Influences ◽  
Better Than

Chronic positive mood (CPM) has been shown to confer a wide variety of social, functional, and health benefits. Some researchers have argued that humans evolved to feel CPM, which explains why most people report better than neutral mood (the “positivity offset bias”) and why particularly happy people have particularly good outcomes. Here, we argue that the Duchenne smile evolved as an honest signal of high levels of CPM, alerting others to the psychological fitness of the smiler. Duchenne smiles are honest because they express felt positive emotion, making it difficult for unhappy people to produce them. Duchenne smiles enable happy people to signal and cooperate with one another, boosting their advantages. In our literature review, we found (a) that not all Duchenne smiles are “honest,” although producing them in the absence of positive emotion is difficult and often detectable, and (b) that the ability to produce and recognize Duchenne smiles may vary somewhat by a person’s cultural origin. In the final section of the article, we consider behavioral influences on CPM, reviewing research showing that engaging in eudaimonic activity reliably produces CPM, as posited by the eudaimonic-activity model. This research suggests that frequent Duchenne smiling may ultimately signal eudaimonic personality as well as CPM.

scholarly journals What maintains signal honesty in animal colour displays used in mate choice?

2017 ◽  
Vol 372 (1724) ◽  
pp. 20160343 ◽  
Author(s):  
Ryan J. Weaver ◽  
Rebecca E. Koch ◽  
Geoffrey E. Hill
Keyword(s):  
Mate Choice ◽  
Female Mate Choice ◽  
Honest Signalling ◽  
Honest Signals ◽  
Explicit Consideration ◽  
Signal Honesty ◽  
Physiological Pathways ◽  
Index Hypothesis ◽  
Male Ornaments ◽  
Colour Signals

Many of the colour displays of animals are proposed to have evolved in response to female mate choice for honest signals of quality, but such honest signalling requires mechanisms to prevent cheating. The most widely accepted and cited mechanisms for ensuring signal honesty are based on the costly signalling hypothesis, which posits that costs associated with ornamentation prevent low-quality males from being highly ornamented. Alternatively, by the index hypothesis, honesty can be achieved via cost-free mechanisms if ornament production is causally linked to core physiological pathways. In this essay, we review how a costly signalling framework has shaped empirical research in mate choice for colourful male ornaments and emphasize that alternative interpretations are plausible under an index signalling framework. We discuss the challenges in both empirically testing and distinguishing between the two hypotheses, noting that they need not be mutually exclusive. Finally, we advocate for a comprehensive approach to studies of colour signals that includes the explicit consideration of cost-free mechanisms for honesty. This article is part of the themed issue ‘Animal coloration: production, perception, function and application’.

scholarly journals Colorful displays signal male quality in a tropical anole lizard

2013 ◽  
Vol 100 (10) ◽  
pp. 993-996 ◽  
Author(s):  
Ellee G. Cook ◽  
Troy G. Murphy ◽  
Michele A. Johnson
Keyword(s):  
Male Quality ◽  
Anole Lizard

Carotenoid-based plumage colouration in red bishops (Euplectes orix) — signalling presence rather than quality?

Behaviour ◽  
2011 ◽  
Vol 148 (11-13) ◽  
pp. 1372-1392 ◽  
Author(s):  
Alice U. Edler ◽  
Thomas W.P. Friedl
Keyword(s):  
Reproductive Success ◽  
Parasite Load ◽  
Blood Parasite ◽  
Male Reproductive Success ◽  
Sexually Dimorphic ◽  
Male Quality ◽  
Plumage Colouration ◽  
Selection For ◽  
Breeding Plumage

AbstractThe role of bright plumage colouration for female choice has been the focus of research in sexual selection for many years, with several studies showing that females prefer the most elaborately ornamented males, which are often also the highest quality individuals. Here, we analysed the associations between reproductive performance and plumage, body condition and blood parasite load in the red bishop (Euplectes orix), a sexually dimorphic and polygynous weaverbird species, where males in a carotenoid-based orange-to-red breeding plumage defend territories and build many nests to which they try to attract females. Male reproductive success in terms of number of nests accepted was mainly determined by the number of nests built, but was also positively related to blood parasite load, while we found no influence of plumage characteristics. Together with previously obtained data, our results indicate that plumage characteristics in the red bishop do not affect male reproductive success and are generally not suitable to reliably indicate male quality. We suggest that the primary function of the brilliant orange-scarlet breeding plumage might be presence signalling in terms of increasing conspicuousness of breeding males to females searching for mates.

Communication of Male Quality in Owl Hoots

2007 ◽  
Vol 169 (4) ◽  
pp. 552-562 ◽  
Author(s):  
Loïc A. Hardouin ◽  
David Reby ◽  
Christian Bavoux ◽  
Guy Burneleau ◽  
Vincent Bretagnolle
Keyword(s):  
Male Quality

scholarly journals Masculinization of gene expression is associated with male quality inDrosophila melanogaster

Evolution ◽  
2018 ◽  
Vol 72 (12) ◽  
pp. 2736-2748 ◽  
Author(s):  
Rebecca Dean ◽  
Camille Hammer ◽  
Vanessa Higham ◽  
Damian K. Dowling
Keyword(s):  
Gene Expression ◽  
Male Quality

scholarly journals Multiple biological mechanisms result in correlations between pre- and post-mating traits that differ among versus within individuals and genotypes

2018 ◽  
Vol 285 (1885) ◽  
pp. 20180951 ◽  
Author(s):  
Cristina Tuni ◽  
Chang S. Han ◽  
Niels J. Dingemanse
Keyword(s):  
Empirical Studies ◽  
Genetic Correlations ◽  
Reproductive Traits ◽  
Fertilization Success ◽  
Male Quality ◽  
Biological Mechanisms ◽  
Environmental Correlations ◽  
Ejaculate Size ◽  
Trade Offs ◽  
The Hierarchical Structure

Reproductive traits involved in mate acquisition (pre-mating traits) are predicted to covary with those involved in fertilization success (post-mating traits). Variation in male quality may give rise to positive, and resource allocation trade-offs to negative, covariances between pre- and post-mating traits. Empirical studies have yielded mixed results. Progress is hampered as researchers often fail to appreciate that mentioned biological mechanisms can act simultaneously but at different hierarchical levels of biological variation: genetic correlations may, for example, be negative due to genetic trade-offs but environmental correlations may instead be positive due to individual variation in resource acquisition. We measured pre-mating (aggression, body weight) and post-mating (ejaculate size) reproductive traits in a pedigreed population of southern field crickets ( Gryllus bimaculatus ). To create environmental variation, crickets were raised on either a low or a high nymphal density treatment. We estimated genetic and environmental sources of correlations between pre- and post-mating traits. We found positive genetic correlations between pre- and post-mating traits, implying the existence of genetic variation in male quality. Over repeated trials of the same individual (testing order), positive changes in one trait were matched with negative changes in other traits, suggesting energy allocating trade-offs within individuals among days. These findings demonstrate the need for research on pre- and post-mating traits to consider the hierarchical structure of trait correlations. Only by doing so was our study able to conclude that multiple mechanisms jointly shape phenotypic associations between pre- and post-mating traits in crickets.

scholarly journals Heightened condition dependent expression of structural colouration in the faces, but not wings, of male and female flies

2021 ◽  
Author(s):  
Thomas E White ◽  
Amy Locke ◽  
Tanya Latty
Keyword(s):  
Mate Choice ◽  
Condition Dependence ◽  
Sexually Dimorphic ◽  
Male And Female ◽  
Honest Signals ◽  
Mutual Mate Choice ◽  
Close Range ◽  
Males And Females ◽  
Structural Colouration

Abstract Structurally coloured sexual signals are a conspicuous and widespread class of ornament used in mate choice, though the extent to which they encode information on the quality of their bearers is not fully resolved. Theory predicts that signalling traits under strong sexual selection as honest indicators should evolve to be more developmentally integrated and exaggerated than nonsexual traits, thereby leading to heightened condition dependence. Here we test this prediction through examination of the sexually dimorphic faces and wings of the cursorial fly Lispe cana. Males and females possess structural UV-white and golden faces, respectively, and males present their faces and wings to females during close-range, ground-based courtship displays, thereby creating the opportunity for mutual inspection. Across a field-collected sample of individuals, we found that the appearance of the faces of both sexes scaled positively with individual condition, though along separate axes. Males in better condition expressed brighter faces as modelled according to conspecific flies, whereas condition scaled with facial saturation in females. We found no such relationships for their wing interference pattern nor abdomens, with the latter included as a nonsexual control. Our results suggest that the structurally coloured faces, but not the iridescent wings, of male and female Lispe cana are reliable guides to individual quality and support the broader potential for structural colours as honest signals. They also highlight the potential for mutual mate choice in this system, while arguing for one of several alternate signalling roles for wing interferences patterns among the myriad taxa which bear them.

scholarly journals Stable eusociality via maternal manipulation when resistance is costless

2015 ◽  
Author(s):  
Mauricio González-Forero
Keyword(s):  
Mathematical Model ◽  
Resource Allocation ◽  
Maternal Care ◽  
Honest Signaling ◽  
Queen Pheromones ◽  
Honest Signals ◽  
Long Run ◽  
Maternal Manipulation ◽  
Selection For ◽  
Eusocial Species

In many eusocial species, queens use pheromones to influence offspring to express worker phenotypes. While evidence suggests that queen pheromones are honest signals of the queen's reproductive health, here I show that queen's honest signaling can result from ancestral maternal manipulation. I develop a mathematical model to study the coevolution of maternal manipulation, offspring resistance to manipulation, and maternal resource allocation. I assume that (1) maternal manipulation causes offspring to be workers against offspring's interests; (2) offspring can resist at no direct cost, as is thought to be the case with pheromonal manipulation; and (3) the mother chooses how much resource to allocate to fertility and maternal care. In the coevolution of these traits, I find that maternal care decreases, thereby increasing the benefit that offspring obtain from help, which in the long run eliminates selection for resistance. Consequently, ancestral maternal manipulation yields stable eusociality despite costless resistance. Additionally, ancestral manipulation in the long run becomes honest signaling that induces offspring to help. These results indicate that both eusociality and its commonly associated queen honest signaling can be likely to originate from ancestral manipulation.

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