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https://www.readbyqxmd.com/read/29351545/love-song-blues-dehp-alters-courtship-vocalizations-in-mice
#1
Nate Seltenrich
No abstract text is available yet for this article.
January 17, 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29346618/evidence-of-adaptive-evolution-and-relaxed-constraints-in-sex-biased-genes-of-south-american-and-west-indies-fruit-flies-diptera-tephritidae
#2
Carlos Congrains, Emeline B Campanini, Felipe R Torres, Víctor B Rezende, Aline M Nakamura, Janaína L de Oliveira, André L A Lima, Samira Chahad-Ehlers, Iderval S Sobrinho, Reinaldo A de Brito
Several studies have demonstrated that genes differentially expressed between sexes (sex-biased genes) tend to evolve faster than unbiased genes, particularly in males. The reason for this accelerated evolution is not clear, but several explanations have involved adaptive and non-adaptive mechanisms. Furthermore, the differences of sex-biased expression patterns of closely related species are also little explored out of Drosophila. To address the evolutionary processes involved with sex-biased expression in species with incipient differentiation, we analyzed male and female transcriptomes of Anastrepha fraterculus and A...
January 15, 2018: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29343607/behavioural-tactic-predicts-preoptic-hypothalamic-gene-expression-more-strongly-than-developmental-morph-in-fish-with-alternative-reproductive-tactics
#3
Joel A Tripp, Ni Y Feng, Andrew H Bass
Reproductive success relies on the coordination of social behaviours, such as territory defence, courtship and mating. Species with extreme variation in reproductive tactics are useful models for identifying the neural mechanisms underlying social behaviour plasticity. The plainfin midshipman (Porichthys notatus) is a teleost fish with two male reproductive morphs that follow widely divergent developmental trajectories and display alternative reproductive tactics (ARTs). Type I males defend territories, court females and provide paternal care, but will resort to cuckoldry if they cannot maintain a territory...
January 31, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29343563/robotic-crabs-reveal-that-female-fiddler-crabs-are-sensitive-to-changes-in-male-display-rate
#4
Sophie L Mowles, Michael D Jennions, Patricia R Y Backwell
Males often produce dynamic, repetitive courtship displays that can be demanding to perform and might advertise male quality to females. A key feature of demanding displays is that they can change in intensity: escalating as a male increases his signalling effort, but de-escalating as a signaller becomes fatigued. Here, we investigated whether female fiddler crabs, Uca mjoebergi, are sensitive to changes in male courtship wave rate. We performed playback experiments using robotic male crabs that had the same mean wave rate, but either escalated, de-escalated or remained constant...
January 2018: Biology Letters
https://www.readbyqxmd.com/read/29339481/repetitive-aggressive-encounters-generate-a-long-lasting-internal-state-in-drosophila-melanogaster-males
#5
Yong-Kyu Kim, Mathias Saver, Jasper Simon, Clement F Kent, Lisha Shao, Mark Eddison, Pavan Agrawal, Michael Texada, James W Truman, Ulrike Heberlein
Multiple studies have investigated the mechanisms of aggressive behavior in Drosophila; however, little is known about the effects of chronic fighting experience. Here, we investigated if repeated fighting encounters would induce an internal state that could affect the expression of subsequent behavior. We trained wild-type males to become winners or losers by repeatedly pairing them with hypoaggressive or hyperaggressive opponents, respectively. As described previously, we observed that chronic losers tend to lose subsequent fights, while chronic winners tend to win them...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29330138/a-biogeographic-and-ecological-perspective-to-the-evolution-of-reproductive-behaviour-in-the-family-salamandridae
#6
Sarah Kieren, Max Sparreboom, Axel Hochkirch, Michael Veith
Amphibians have a complex reproductive behaviour, which shows the highest diversity among tetrapodes. The family Salamandridae, distributed across the entire Holarctic, is one of the most diverse groups of extant salamanders comprising 114 species in 21 genera. The family has a remarkable diversity of courtship modes, amplexus and sperm transfer. It is often hypothesised that this diversity has evolved in adaptation to a specific mating and/or breeding habitat. We test this hypothesis based upon a phylogenetic reconstruction using the complete mitochondrial genome sequences of 45 Salamandridae species, representing all existing genera...
January 9, 2018: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29322941/persistent-activity-in-a-recurrent-circuit-underlies-courtship-memory-in-drosophila
#7
Xiaoliang Zhao, Daniela Lenek, Ugur Dag, Barry Dickson, Krystyna Keleman
Recurrent connections are thought to be a common feature of the neural circuits that encode memories, but how memories are laid down in such circuits is not fully understood. Here we present evidence that courtship memory in Drosophila relies on the recurrent circuit between mushroom body gamma (MBg), M6 output, and aSP13 dopaminergic neurons. We demonstrate persistent neuronal activity of aSP13 neurons and show that it transiently potentiates synaptic transmission from MBγ>M6 neurons. M6 neurons in turn provide input to aSP13 neurons, prolonging potentiation of MBγ>M6 synapses over time periods that match short-term memory...
January 11, 2018: ELife
https://www.readbyqxmd.com/read/29321506/interference-of-chemical-defence-and-sexual-communication-can-shape-the-evolution-of-chemical-signals
#8
Lisa Pfeiffer, Joachim Ruther, John Hofferberth, Johannes Stökl
According to current evolutionary theory, insect pheromones can originate from extant precursor compounds being selected for information transfer. This is exemplified by females of the parasitoid wasp Leptopilina heterotoma whose defensive secretion consisting mainly of (-)-iridomyrmecin has evolved secondary functions as cue to avoid other females during host search and as female sex pheromone. To promote our understanding of pheromone evolution from defensive secretions we studied the chemical ecology of Leptopilina clavipes...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317637/structural-absorption-by-barbule-microstructures-of-super-black-bird-of-paradise-feathers
#9
Dakota E McCoy, Teresa Feo, Todd Alan Harvey, Richard O Prum
Many studies have shown how pigments and internal nanostructures generate color in nature. External surface structures can also influence appearance, such as by causing multiple scattering of light (structural absorption) to produce a velvety, super black appearance. Here we show that feathers from five species of birds of paradise (Aves: Paradisaeidae) structurally absorb incident light to produce extremely low-reflectance, super black plumages. Directional reflectance of these feathers (0.05-0.31%) approaches that of man-made ultra-absorbent materials...
January 9, 2018: Nature Communications
https://www.readbyqxmd.com/read/29317624/fast-intensity-adaptation-enhances-the-encoding-of-sound-in-drosophila
#10
Jan Clemens, Nofar Ozeri-Engelhard, Mala Murthy
To faithfully encode complex stimuli, sensory neurons should correct, via adaptation, for stimulus properties that corrupt pattern recognition. Here we investigate sound intensity adaptation in the Drosophila auditory system, which is largely devoted to processing courtship song. Mechanosensory neurons (JONs) in the antenna are sensitive not only to sound-induced antennal vibrations, but also to wind or gravity, which affect the antenna's mean position. Song pattern recognition, therefore, requires adaptation to antennal position (stimulus mean) in addition to sound intensity (stimulus variance)...
January 9, 2018: Nature Communications
https://www.readbyqxmd.com/read/29313303/ecologically-relevant-exposure-to-methylmercury-during-early-development-does-not-affect-adult-phenotype-in-zebra-finches-taeniopygia-guttata
#11
Spencer A M Morran, John E Elliott, Jessica M L Young, Margaret L Eng, Niladri Basu, Tony D Williams
Methylmercury causes behavioural and reproductive effects in adult mammals via early developmental exposure. Similar studies in birds are limited and mostly focussed on aquatic systems, but recent work has reported high blood mercury concentrations in terrestrial, passerine songbirds. We used the zebra finch (Taeniopygia guttata) as a model to explore the long-term effects of early developmental exposure to methylmercury exposure. Chicks were dosed orally with either the vehicle control, 0.0315 µg Hg/g bw/day, or 0...
January 8, 2018: Ecotoxicology
https://www.readbyqxmd.com/read/29305016/-design-and-validation-of-the-scale-for-the-detection-of-violence-in-courtship-in-young-people-in-the-sevilla-university-spain
#12
María Ángeles García-Carpintero, Javier Rodríguez-Santero, Ana María Porcel-Gálvez
OBJECTIVE: To design and validate a specific instrument to detect exercised and suffered in the relations of young couples in violence. METHOD: Descriptive study of validation clinimetric. Stratified by sex and area of knowledge, which was adopted as inclusion criteria have or have had any relationship. The sample consisted of 447 subjects. RESULTS: We obtained the Multidimensional Scale Dating Violence (EMVN), 32 items with three dimensions: physical and sexual assault, behavior control (cyberbullying, surveillance and harassment) and abuse psicoemocional (disparagement and domination), as a victim or as aggressor...
January 2, 2018: Gaceta Sanitaria
https://www.readbyqxmd.com/read/29299956/-great-is-darwin-and-bergson-his-poet-julian-huxley-s-other-evolutionary-synthesis
#13
Emily Herring
In 1912, Julian Huxley published his first book The Individual in the Animal Kingdom which he dedicated to the then world-famous French philosopher Henri Bergson. Historians have generally adopted one of two attitudes towards Huxley's early encounter with Bergson. They either dismiss it entirely as unimportant or minimize it, deeming it a youthful indiscretion preceding Huxley's full conversion to Fisherian Darwinism. Close biographical study and archive materials demonstrate, however, that neither position is tenable...
January 4, 2018: Annals of Science
https://www.readbyqxmd.com/read/29299233/mating-status-correlates-with-dorsal-brightness-in-some-but-not-all-poison-frog-populations
#14
Corinna E Dreher, Ariel Rodríguez, Molly E Cummings, Heike Pröhl
Sexual signals are important for intraspecific communication and mate selection, but their evolution may be driven by both natural and sexual selection, and stochastic processes. Strawberry poison frogs (Oophaga pumilio) show strong color divergence among populations, but coloration also varies among individuals of the same population. The importance of coloration for female mate choice has been studied intensely, and sexual selection seems to affect color divergence in strawberry poison frogs. However, the effect of coloration on mating success under field conditions has received very little attention...
December 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29288628/mating-behavior-of-the-west-nile-virus-vector-culex-pipiens-role-of-behavioral-asymmetries
#15
Giovanni Benelli
Culex pipiens is a vector of West Nile, Rift Valley fever, Japanese encephalitis virus and Usutu viruses. In agreement with the criteria of Integrated Vector Management, several research efforts have been devoted to develop behavior-based control tools to fight mosquito vectors. However, our knowledge of mosquito mating biology and sexual communication is still patchy. Despite the high relevance of C. pipiens as a vector of medical and veterinary importance, no studies on its mating behavior and the factors routing mating success have been conducted...
December 27, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29273708/rainbow-peacock-spiders-inspire-miniature-super-iridescent-optics
#16
Bor-Kai Hsiung, Radwanul Hasan Siddique, Doekele G Stavenga, Jürgen C Otto, Michael C Allen, Ying Liu, Yong-Feng Lu, Dimitri D Deheyn, Matthew D Shawkey, Todd A Blackledge
Colour produced by wavelength-dependent light scattering is a key component of visual communication in nature and acts particularly strongly in visual signalling by structurally-coloured animals during courtship. Two miniature peacock spiders (Maratus robinsoni and M. chrysomelas) court females using tiny structured scales (~ 40 × 10 μm2) that reflect the full visual spectrum. Using TEM and optical modelling, we show that the spiders' scales have 2D nanogratings on microscale 3D convex surfaces with at least twice the resolving power of a conventional 2D diffraction grating of the same period...
December 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/29242456/taxonomic-status-of-i-parotia-i-i-berlepschi-i-kleinschmidt-1897-based-on-analysis-of-external-appearance-voice-and-behavior-aves-paradisaeidae
#17
Edwin Scholes, Bruce M Beehler, Timothy G Laman
Described from trade-skins of unknown origins, Parotia berlepschi Kleinschmidt, 1897 was the subject of a longstanding ornithological mystery that remained unresolved for well over a century. With few specimens and no known wild population, most taxonomic assessments over the last century have treated P. berlepschi as a subspecies of Parotia carolae Meyer, 1894. Following discovery of its geographical home in 2005, most authorities returned to giving P. berlepschi full species status. However, evidence supporting the delineation of P...
October 10, 2017: Zootaxa
https://www.readbyqxmd.com/read/29237855/sex-specific-adaptation-and-genomic-responses-to-y-chromosome-presence-in-female-reproductive-and-neural-tissues
#18
Alan T Branco, Rute M Brito, Bernardo Lemos
Y chromosomes typically harbour a small number of genes and an abundance of repetitive sequences. In Drosophila, the Y chromosome comprises multimegabase long segments of repetitive DNA and a handful of protein-coding genes. In mammals, the Y chromosome also harbours a disproportionally high abundance of repeats. Here, we built on a Drosophila melanogaster model in which the Y chromosome is decoupled from sexual determination. Genotypes were genetically identical for the autosomes, X chromosome, and mitochondria, but differ by the presence or dose of the Y chromosome...
December 20, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29237552/female-songbirds-the-unsung-drivers-of-courtship-behavior-and-its-neural-substrates
#19
REVIEW
Ammon Perkes, David White, Martin Wild, Marc Schmidt
Songbirds hold a prominent role in the fields of neurobiology, evolution, and social behavior. Many of these fields have assumed that females lacked the ability to produce song and have therefore treated song as a male-specific behavior. Consequently, much of our understanding regarding the evolution and neural control of song behavior has been driven by these assumptions. Here we review literature from diverse fields to provide a broader perspective of the role of females in vocal communication and courtship...
December 10, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/29233985/mating-system-manipulation-and-the-evolution-of-sex-biased-gene-expression-in-drosophila
#20
Paris Veltsos, Yongxiang Fang, Andrew R Cossins, Rhonda R Snook, Michael G Ritchie
Sex differences in dioecious animals are pervasive and result from gene expression differences. Elevated sexual selection has been predicted to increase the number and expression of male-biased genes, and experimentally imposing monogamy on Drosophila melanogaster has led to a relative feminisation of the transcriptome. Here, we test this hypothesis further by subjecting another polyandrous species, D. pseudoobscura, to 150 generations of experimental monogamy or elevated polyandry. We find that sex-biased genes do change in expression but, contrary to predictions, there is usually masculinisation of the transcriptome under monogamy, although this depends on tissue and sex...
December 12, 2017: Nature Communications
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