Lmst

Wiring the sexes: @evolvwing &co use CRISPR knockouts & single-nucleus transcriptomics to decipher the regulatory logic of #SexualDimorphism in sulphur #butterflies, where males display bright UV colors thanks to specialized iridescent scales @PLOSBiology https://plos.io/445Iz7d

Left: Scanning electron micrograph of two male-specific scale types found on the wings of male sulphur butterflies, with UV-iridescent scales (pink) and brown lanceolate scale from the marginal region. Image credit: Arnaud Martin / The George Washington University. Right: UV coloration, which is invisible to the human eye, is used as a male courtship signal in orange sulphur butterflies, shown here in magenta. Butterfly wings consist of two layers of microscopic scales, and in UV-iridescent butterflies, the upper layer harbors unique optical properties. These scales reflect ultraviolet thanks to complex layers of chitin on their surfaces, a nanostructure that resembles Christmas trees and is absent from non-UV scales. Image credit: Illustration by Julie Johnson/Life Science Studios (CC-BY license agreement provided to Arnaud Martin)

In this new Historical Perspective, Ken S. Toyama describes how the original definition of Rensch's rule, which has been overlooked for decades, can impact the way we study sexual dimorphism. Read now ahead of print!
https://www.journals.uchicago.edu/doi/10.1086/735583

#renschsRule #sexualDimorphism #dimorphism #historicalPerspective

Male and female #orangetip #butterflies.

#nature #naturephotography #wildlife #invertebrates #insects #lepidoptera #butterfly #sexualdimorphism #CountyDown #NorthernIreland @ukbutterflies

#SexualDimorphism #Dimorphism #Monkey #Monkeys #ProboscisMonkey #ProboscisMonkeys.

#Meme #Memes #Humour #Humor

#DioeciousPlants show #SexualDimorphism in their #Phosphorus (P) availability responses. Thus, Shengwei Si et al. explored the #Sex-specific P-use and -acquisition in dioecious #PopulusEuphratica under different #SoilMoisture levels.
Details: https://doi.org/10.1093/jpe/rtae064

Soil active Pi (a) and Po (b) in the rhizosphere of P. euphratica females and males grown under varying water management practices.

Today I learned [via the amazing Merlin Bird ID app] that this is a female #RedWingedBlackbird. While I've never really thought about it, I didn't know about their sexual dimorphism. RWBBs are increasingly hard to come by around here since we've seen so much wetland loss.

I took this photo in June, 2009 🤯 with a Fuji point and shoot, and am only just now paying attention to it. Goes to show, there's always much to learn despite how far you've come.

#MerlinBirdID #Birding #sexualdimorphism #Missouri #KC-ish

A bird is perched in a tree with fern like leaves. The bird is mostly grey and boring, aside from a light colored breast with dark mottled streaks running down vertically.

@sundogplanets I am certain that #ElephantSeals are worse. Especially the #AlphaMales from the #DeltaQuadrant. They are much larger, much louder, eat more of the crab and calamari that I like the best, and exhibit wildly excessive #SexualDimorphism. The beach masters’ #harem acquisition also condemns many perfectly fine male elephant seals to lives as #incels. I took a #CrownCollege Core class at #UCSC in 1968 from #BurneyLeBoeuf, who was just beginning his studies at #AñoNuevoStatePark while also fathering the field of #Psychobiology. Admittedly, the class was on an unrelated subject—#ScienceCultureAndMan, but, still, #ProveMeWrong.

A nose for love
https://oceanbites.org/a-nose-for-love/

First evidence of #SexualDimorphism in olfactory organs of #DeepSea #lanternfishes (Myctophidae) https://peerj.com/articles/17075/

"In some #lanternfish, males and females are the same size, but males have bigger noses (olfactory rosettes). This suggests that the males have a more sensitive sense of smell, which they could use to detect chemical signals (#pheromones) produced by females."

Underwater photo of a robotic vehicle exploring sandy sea floor

Jezebel: Sex. Celebrity. Politics. With Teeth: A New Book on the Evolution of the Female Body Will Blow Your Mind https://jezebel.com/a-new-book-on-the-evolution-of-the-female-body-will-blo-1850906460 #Jezebel #reproductivesystem #lowerpaleolithic #sexualdimorphism #humanevolution #animalanatomy #primatology #catbohannon #homohabilis #chimpanzee #hominidae #hominini #primate #sapien #gelada #donna #bruce #eves #homo

Unraveling secrets of #sexualconflict: We highlight the role of genetic vs maternal effects in shaping female vs male body sizes. 🕷️📐

#SexualDimorphism #EvolutionaryGenetics #openaccess

https://onlinelibrary.wiley.com/doi/10.1111/jeb.14217

New study explores the evolution of sexual dimorphism in birds: are colorful males and larger females the result of extra-pair paternity? Learn more from Bart Kempenaers, Mihai Valcu and Cristina Valcu: https://doi.org/10.1111/jeb.14172

#ornithology #evolution #sexualdimorphism #birds #science #ScienceMastodon #scicomm #wisskomm

A pair of Sialia Mexicana as an example for dimorphism in plumage coloration: The male is gray on the belly, bright blue on the top and throat, and orange-brown on the breast. The female is less colorful and is brown on the breast and gray on the back, throat and hood.

On the subject of sexual dimorphism in #dinosaurs

#sexualdimorphism

A smug man sits behind a desk. The sign on the front says "Dryosaurus is a male Camptosaurus – change my mind".

A flock of female Red-Winged Blackbirds stopped by the pond today. Males and females migrate separately and look quite different, with the males being solid black except for scarlet and yellow shoulder patches. ID thanks to the experts on iNaturalist. #BirdPhotography #iNaturalist #BirdMigration #SexualDimorphism

Two birds standing on a rock ledge with a third bird flying in to land above them. The birds are black and dark brown, with a tapestry of brown, orange, and cream edges to their feathers.

A bird standing on a rock ledge. She has a short, black, conical beak and an alert look.

How is diversity maintained in a competitive arena (be it Darwinian or political), when intuitively one would expect a single optimal strategy to succeed over all others? In simulations, stable clusters occur when there is an advantage to being different per se. Such models could explain #SexualDimorphism, #ImmunogeneticVariation, or even #PoliticalParties. But confirming this empirically is a challenge.
#BalancingSelection #FitnessLandscape
#EvolutionarySimulation

#SexualDimorphism

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