scholarly journals Physiological constraint on acrobatic courtship behavior underlies rapid sympatric speciation in bearded manakins

eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Meredith C Miles ◽  
Franz Goller ◽  
Matthew J Fuxjager
Keyword(s):  
Sexual Selection ◽  
Courtship Behavior ◽  
Sympatric Speciation ◽  
Muscle Performance ◽  
Courtship Display ◽  
Motor Systems ◽  
Trade Off ◽  
Species Radiation ◽  
Physiological Constraint ◽  
Instrumental Role

Physiology’s role in speciation is poorly understood. Motor systems, for example, are widely thought to shape this process because they can potentiate or constrain the evolution of key traits that help mediate speciation. Previously, we found that Neotropical manakin birds have evolved one of the fastest limb muscles on record to support innovations in acrobatic courtship display (Fuxjager et al., 2016a). Here, we show how this modification played an instrumental role in the sympatric speciation of a manakin genus, illustrating that muscle specializations fostered divergence in courtship display speed, which may generate assortative mating. However, innovations in contraction-relaxation cycling kinetics that underlie rapid muscle performance are also punctuated by a severe speed-endurance trade-off, blocking further exaggeration of display speed. Sexual selection therefore potentiated phenotypic displacement in a trait critical to mate choice, all during an extraordinarily fast species radiation—and in doing so, pushed muscle performance to a new boundary altogether.

scholarly journals Structure of Lekking Courts of Male White-Bearded Manakins (Manacus Manacus) Is Linked to Their Attractiveness

2017 ◽  
Author(s):  
Kirill Tokarev ◽  
Yntze van der Hoek
Keyword(s):  
Sexual Selection ◽  
Courtship Behavior ◽  
Courtship Display ◽  
Close Proximity ◽  
Manacus Manacus ◽  
Courtship Displays

AbstractMale White-bearded Manakins (Manacus manacus) perform courtship displays on individual courts in close proximity of each other, while females visit them to choose potential mates. These displays represent a sequence of physiologically demanding movements, including rapid hops between saplings on the court. Our observations of courtship behavior and court characteristics of eight males suggest that the structure of the court may be an important factor in courtship: we found regularities in the inter-sapling distances on the courts of males that attracted females. We hypothesize that sexual selection by females may favor those males that have courts providing an optimal platform for their courtship display.Estructura de escenarios de lek de saltarines barbiblancos (Manacus manacus) es conectada a su atractivoResumen: Los saltarines barbiblancos (Manacus manacus) machos realizan despliegues de cortejo en “escenarios” individuales cercanos los unos a los otros, mientras las hembras los visitan para escoger su pareja potencial. Estos despliegues representan una secuencia de movimientos fisiológicamente arduos, que incluyen saltos rápidos entre los palos o plantones del escenario. Nuestras observaciones de comportamiento nupcial y de las características de los escenarios de ocho machos sugieren que la estructura del escenario puede ser importante para cortejo: habían regularidades en distancias entre los palos de los escenarios de los machos que atrajeron hembras. Formulamos la hipótesis que la selección sexual realizada por las hembras favorece los machos con escenarios que proporcionan una plataforma óptima para sus despliegues de cortejo.

scholarly journals Absence of reproduction-immunity trade-off in male Drosophila melanogaster evolving under differential sexual selection

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Zeeshan Ali Syed ◽  
Vanika Gupta ◽  
Manas Geeta Arun ◽  
Aatashi Dhiman ◽  
Bodhisatta Nandy ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Sexual Selection ◽  
Trade Off

scholarly journals Increased wave action promotes muscle performance but increasing temperatures cause a tenacity–endurance trade-off in intertidal snails (Nerita atramentosa)

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Samuel Clayman ◽  
Frank Seebacher
Keyword(s):  
Maximum Stress ◽  
Citrate Synthase ◽  
Wave Action ◽  
Sea Surface ◽  
Muscle Performance ◽  
Trade Off ◽  
Physiological Capacity ◽  
Winter Temperatures ◽  
Summer Temperatures ◽  
Physical Impact

Abstract Concurrent increases in wave action and sea surface temperatures increase the physical impact on intertidal organisms and affect their physiological capacity to respond to that impact. Our aim was to determine whether wave exposure altered muscle function in intertidal snails (Nerita atramentosa) and whether responses to wave action and temperature are plastic, leading to compensation for altered environmental conditions. We show that field snails from exposed shores had greater endurance and vertical tenacity than snails from matched protected shores (n = 5 pairs of shores). There were no differences in muscle metabolic capacities (strombine/lactate dehydrogenase, citrate synthase and cytochrome c oxidase activities) between shore types. Maximum stress (force/foot area) produced by isolated foot muscle did not differ between shore types, but foot muscle from snails on exposed shores had greater endurance. A laboratory experiment showed that vertical tenacity was greater in animals acclimated for 3 weeks to cool winter temperatures (15 C) compared to summer temperatures (25 C), but endurance was greater in snails acclimated to 25°C. Acclimation to water flow that mimicked wave action in the field increased vertical tenacity but decreased endurance. Our data show that increased wave action elicits a training effect on muscle, but that increasing sea surface temperature can cause a trade-off between tenacity and endurance. Ocean warming would negate the beneficial increase in tenacity that could render snails more resistant to acute impacts of wave action, while promoting longer term resistance to dislodgment by waves.

scholarly journals Reduced cooperative behavior as a cost of high testosterone in a lekking passerine bird

2019 ◽  
Vol 31 (2) ◽  
pp. 401-410 ◽  
Author(s):  
Ben J Vernasco ◽  
Brent M Horton ◽  
Ignacio T Moore ◽  
T Brandt Ryder
Keyword(s):  
Experimental Study ◽  
Observational Study ◽  
Courtship Behavior ◽  
Cooperative Behavior ◽  
Reproductive Traits ◽  
Passerine Bird ◽  
Courtship Display ◽  
Courtship Behaviors ◽  
Pipra Filicauda ◽  
Courtship Displays

Abstract Many studies have identified the reproductive benefits of cooperative behaviors, yet few have identified the mechanisms that underlie these behaviors. Mechanistic studies can inform our understanding of why some individuals are more or less cooperative, as well as identify the physiological constraints imposed upon the evolution of reproductive traits. Male wire-tailed manakins (Pipra filicauda) exhibit cooperative courtship behaviors and more cooperative territory holders have been shown to exhibit higher reproductive success. To begin to understand the proximate basis of cooperative display behaviors, we conducted both an observational study and an experimental study. Because coordinated courtship displays underlie this form of cooperation, our study also examined both the hormonal and social drivers of individual variation in courtship behavior more broadly (e.g., courtship display rates). Our observational study revealed that males with higher testosterone levels performed fewer cooperative display bouts. In addition, our experimental study demonstrated that the proportion of a male’s courtship displays that were cooperative decreased after being administered a testosterone-filled hormone implant. We found no relationship between an individual’s courtship display effort (i.e., display rate and time spent performing courtship displays) and circulating testosterone in either study. However, more cooperative males spent a greater proportion of time performing courtship displays than did less cooperative males, suggesting that testosterone may indirectly mediate courtship display behaviors by influencing a territory holder’s cooperative behavior. Overall, both our observational and experimental results suggest that reduced cooperative behavior is a cost of maintaining high levels of testosterone for territory-holding males.

scholarly journals A trade-off between natural and sexual selection underlies diversification of a sexual signal

2014 ◽  
Vol 26 (2) ◽  
pp. 533-542 ◽  
Author(s):  
Justa L. Heinen-Kay ◽  
Kirstin E. Morris ◽  
Nicole A. Ryan ◽  
Samantha L. Byerley ◽  
Rebecca E. Venezia ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Sexual Signal ◽  
Trade Off ◽  
Natural And Sexual Selection

scholarly journals Sexual selection can constrain sympatric speciation

2004 ◽  
Vol 271 (1540) ◽  
pp. 687-693 ◽  
Author(s):  
Mark Kirkpatrick ◽  
Scott L. Nuismer
Keyword(s):  
Sexual Selection ◽  
Sympatric Speciation

scholarly journals Sexual selection drives the evolution of wing interference patterns

2018 ◽  
Author(s):  
MF Hawkes ◽  
E Duffy ◽  
R Joag ◽  
A Skeats ◽  
J Radwan ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Digital Imaging ◽  
Colour Vision ◽  
Species Recognition ◽  
Sexual Attractiveness ◽  
Courtship Display ◽  
Structural Coloration ◽  
Male And Female ◽  
Selection For ◽  
First Time

AbstractThe seemingly transparent wings of many insects have recently been found to display dramatic structural coloration. These structural colours (wing interference patterns: WIPs) may be involved in species recognition and mate choice, yet little is known about the evolutionary processes that shape them. Additionally, existing research has been restricted by analysing WIPs without due consideration of how they are actually perceived by the viewers’ colour vision. Here, we use multispectral digital imaging and a model ofDrosophilavision to compare WIPs of male and femaleDrosophila simulansfrom replicate populations forced to evolve with or without sexual selection for 68 generations. We show for the first time that WIPs modelled inDrosophilavision evolve in response to sexual selection, and confirm that WIPs correlate with male sexual attractiveness. These findings add a new element to the otherwise well describedDrosophilacourtship display and confirm that wing colours evolve through sexual selection.

Sign in / Sign up

Export Citation Format

Share Document