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https://www.readbyqxmd.com/read/28202817/adaptive-shaping-of-the-behavioural-and-neuroendocrine-phenotype-during-adolescence
#1
Tobias D Zimmermann, Sylvia Kaiser, Michael B Hennessy, Norbert Sachser
Environmental conditions during early life can adaptively shape the phenotype for the prevailing environment. Recently, it has been suggested that adolescence represents an additional temporal window for adaptive developmental plasticity, though supporting evidence is scarce. Previous work has shown that male guinea pigs living in large mixed-sex colonies develop a low-aggressive phenotype as part of a queuing strategy that is adaptive for integrating into large unfamiliar colonies. By contrast, males living in pairs during adolescence become highly aggressive towards strangers...
February 22, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28198464/sublethal-doses-of-imidacloprid-disrupt-sexual-communication-and-host-finding-in-a-parasitoid-wasp
#2
Lars Tappert, Tamara Pokorny, John Hofferberth, Joachim Ruther
Neonicotinoids are widely used insecticides, but their use is subject of debate because of their detrimental effects on pollinators. Little is known about the effect of neonicotinoids on other beneficial insects such as parasitoid wasps, which serve as natural enemies and are crucial for ecosystem functioning. Here we show that sublethal doses of the neonicotinoid imidacloprid impair sexual communication and host finding in the parasitoid wasp Nasonia vitripennis. Depending on the dose, treated females were less responsive to the male sex pheromone or unable to use it as a cue at all...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28193557/birds-and-flame-retardants-a-review-of-the-toxic-effects-on-birds-of-historical-and-novel-flame-retardants
#3
REVIEW
Mélanie F Guigueno, Kim J Fernie
Flame retardants (FRs) are a diverse group of chemicals, many of which persist in the environment and bioaccumulate in biota. Although some FRs have been withdrawn from manufacturing and commerce (e.g., legacy FRs), many continue to be detected in the environment; moreover, their replacements and/or other novel FRs are also detected in biota. Here, we review and summarize the literature on the toxic effects of various FRs on birds. Birds integrate chemical information (exposure, effects) across space and time, making them ideal sentinels of environmental contamination...
February 10, 2017: Environmental Research
https://www.readbyqxmd.com/read/28189029/disruption-of-thyroxine-and-sex-hormones-by-1-2-dibromo-4-1-2-dibromoethyl-cyclohexane-dbe-dbch-in-american-kestrels-falco-sparverius-and-associations-with-reproductive-and-behavioral-changes
#4
Sarah C Marteinson, Vince Palace, Robert J Letcher, Kim J Fernie
1,2-dibromo-4-(1,2-dibromoethyl)cyclohexane (DBE-DBCH - formerly TBECH) is an emerging brominated flame retardant (BFR) pollutant with androgen potentiating ability and other endocrine disrupting effects in birds and fish. The objectives of this study were to determine the effects of exposure to environmentally-relevant levels of DBE-DBCH on circulating levels of thyroid and sex steroid hormones in American kestrels, and if hormonal concentrations were related to previously reported changes in reproductive success and courtship behaviors...
February 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/28185941/expression-map-of-a-complete-set-of-gustatory-receptor-genes-in-chemosensory-organs-of-bombyx-mori
#5
Huizhen Guo, Tingcai Cheng, Zhiwei Chen, Liang Jiang, Youbing Guo, Jianqiu Liu, Shenglong Li, Kiyoko Taniai, Kiyoshi Asaoka, Keiko Kadono-Okuda, Kallare P Arunkumar, Jiaqi Wu, Hirohisa Kishino, Huijie Zhang, Rakesh K Seth, Karumathil P Gopinathan, Nicolas Montagné, Emmanuelle Jacquin-Joly, Marian R Goldsmith, Qingyou Xia, Kazuei Mita
Most lepidopteran species are herbivores, and interaction with host plants affects their gene expression and behavior as well as their genome evolution. Gustatory receptors (Grs) are expected to mediate host plant selection, feeding, oviposition and courtship behavior. However, due to their high diversity, sequence divergence and extremely low level of expression it has been difficult to identify precisely a complete set of Grs in Lepidoptera. By manual annotation and BAC sequencing, we improved annotation of 43 gene sequences compared with previously reported Grs in the most studied lepidopteran model, the silkworm, Bombyx mori, and identified 7 new tandem copies of BmGr30 on chromosome 7, bringing the total number of BmGrs to 76...
February 6, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28181991/optimal-asymmetry-and-other-motion-parameters-that-characterise-high-quality-female-dance
#6
Kristofor McCarty, Hannah Darwin, Piers L Cornelissen, Tamsin K Saxton, Martin J Tovée, Nick Caplan, Nick Neave
Dance is a universal human behaviour that is observed particularly in courtship contexts, and that provides information that could be useful to potential partners. Here, we use a data-driven approach to pinpoint the movements that discriminate female dance quality. Using 3D motion-capture we recorded women whilst they danced to a basic rhythm. Video clips of 39 resultant avatars were rated for dance quality, and those ratings were compared to quantitative measurements of the movement patterns using multi-level models...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28178286/sexual-communication-in-castniid-moths-males-mark-their-territories-and-appear-to-bear-all-chemical-burden
#7
Carmen Quero, Victor Sarto I Monteys, Gloria Rosell, Marc Puigmartí, Angel Guerrero
Castniid moths (Lepidoptera: Castniidae) display a butterfly-like reproductive behavior, i.e., they use visual stimuli for mate location and females have apparently lost their pheromone glands in an evolutionary context. In this paper we report for the first time the identification of three new compounds, namely n-octadecyl acetate, (Z)-9-octadecenyl acetate and (E,Z)-2,13-octadecadienyl acetate, in males of the Castniid Palm Borer, Paysandisia archon, which could be involved in its short-range courtship behavior, and also shed light on recent controversies on the sexual behavior of the species...
2017: PloS One
https://www.readbyqxmd.com/read/28174268/failure-to-reproduce-period-dependent-song-cycles-in-drosophila-is-due-to-poor-automated-pulse-detection-and-low-intensity-courtship
#8
Charalambos P Kyriacou, Edward W Green, Arianna Piffer, Harold B Dowse
Stern has criticized a body of work from several groups that have independently studied the so-called "Kyriacou and Hall" courtship song rhythms of male Drosophila melanogaster, claiming that these ultradian ∼60-s cycles in the interpulse interval (IPI) are statistical artifacts that are not modulated by mutations at the period (per) locus [Stern DL (2014) BMC Biol 12:38]. We have scrutinized Stern's raw data and observe that his automated song pulse-detection method identifies only ∼50% of the IPIs found by manual (visual and acoustic) monitoring...
February 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28169372/copulatory-courtship-by-internal-genitalia-in-bushcrickets
#9
Nadja C Wulff, Thomas van de Kamp, Tomy Dos Santos Rolo, Tilo Baumbach, Gerlind U C Lehmann
Male genital organs are among the fastest evolving morphological structures. However, large parts of the male's genitalia are often hidden inside the female during mating. In several bushcricket species, males bear a pair of sclerotized genital appendices called titillators. By employing synchrotron-based in vivo X-ray cineradiography on mating couples, we were able to visualize titillator movement and spermatophore attachment inside the female. Titillators are inserted and retracted rhythmically. During insertion the titillator processes tap the soft and sensillae-covered dorsal side of the female's flap-like genital fold, which covers the opening of the female's genitalia, without tissue penetration...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28149319/effects-of-the-social-environment-during-adolescence-on-the-development-of-social-behaviour-hormones-and-morphology-in-male-zebra-finches-taeniopygia-guttata
#10
Stefanie Bölting, Nikolaus von Engelhardt
BACKGROUND: Individual differences in behaviour are widespread in the animal kingdom and often influenced by the size or composition of the social group during early development. In many vertebrates the effects of social interactions early in life on adult behaviour are mediated by changes in maturation and physiology. Specifically, increases in androgens and glucocorticoids in response to social stimulation seem to play a prominent role in shaping behaviour during development. In addition to the prenatal and early postnatal phase, adolescence has more recently been identified as an important period during which adult behaviour and physiology are shaped by the social environment, which so far has been studied mostly in mammals...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28144949/blown-by-the-wind-the-ecology-of-male-courtship-display-behavior-in-orchid-bees
#11
Tamara Pokorny, Ira Vogler, René Losch, Patrick Schlütting, Pedro Juarez, Nicolai Bissantz, Santiago R Ramírez, Thomas Eltz
Many insects rely on chemical signals to transmit precise information on the location, identity, and quality of potential mates. Chemical signals are often broadcasted at sites with physical properties that maximize signal propagation and signal transmision. Male neotropical orchid bees (Euglossini) perch and display on vertical branches and tree trunks in the forest to expose volatile blends (perfumes) that they previously collected from their environment. Previous studies have shown that the chemical composition of perfume blends is highly differentiated even between closely related species...
February 1, 2017: Ecology
https://www.readbyqxmd.com/read/28140374/an-unsupervised-method-for-quantifying-the-behavior-of-paired-animals
#12
Ugne Klibaite, Gordon J Berman, Jessica Cande, David L Stern, Joshua W Shaevitz
Behaviors involving the interaction of multiple individuals are complex and frequently crucial for an animal's survival. These interactions, ranging across sensory modalities, length scales, and time scales, are often subtle and difficult to characterize. Contextual effects on the frequency of behaviors become even more difficult to quantify when physical interaction between animals interferes with conventional data analysis, e.g. due to visual occlusion. We introduce a method for quantifying behavior in fruit fly interaction that combines high-throughput video acquisition and tracking of individuals with recent unsupervised methods for capturing an animal's entire behavioral repertoire...
February 16, 2017: Physical Biology
https://www.readbyqxmd.com/read/28127115/agonistic-display-or-courtship-behavior-a-review-of-contests-over-mating-opportunity-in-butterflies
#13
REVIEW
Tsuyoshi Takeuchi
Male butterflies compete over mating opportunities. Two types of contest behavior are reported. Males of various butterfly species compete over a mating territory via aerial interactions until one of the two contestants retreats. Males of other butterfly species fly around larval food plants to find receptive females. Males of some species among the latter type can find a conspecific pupa, and they gather around it without expelling their rivals. Scramble competition over mating occurs when a female emerges from the pupa...
2017: Journal of Ethology
https://www.readbyqxmd.com/read/28120945/imorin-a-sexual-attractiveness-pheromone-in-female-red-bellied-newts-cynops-pyrrhogaster
#14
Tomoaki Nakada, Fumiyo Toyoda, Kouhei Matsuda, Takashi Nakakura, Itaru Hasunuma, Kazutoshi Yamamoto, Satomi Onoue, Makoto Yokosuka, Sakae Kikuyama
The male red-bellied newt (Cynops pyrrhogaster) approaches the female's cloaca prior to performing any courtship behaviour, as if he is using some released substance to gauge whether she is sexually receptive. Therefore, we investigated whether such a female sexual attractiveness pheromone exists. We found that a tripeptide with amino acid sequence Ala-Glu-Phe is secreted by the ciliary cells in the epithelium of the proximal portion of the oviduct of sexually developed newts and confirmed that this is the major active substance in water in which sexually developed female newts have been kept...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28120319/sexual-communication-and-domestication-may-give-rise-to-the-signal-complexity-necessary-for-the-emergence-of-language-an-indication-from-songbird-studies
#15
Kazuo Okanoya
For language to be a vehicle of thought, protolanguage must develop a degree of complexity that allows for the syntactic manipulation of symbol sequences. Thus, before language emerged, a process in which signals became complex must have occurred. Here, we submit a scenario describing the process in which courtship songs gained in complexity during the course of domestication of Bengalese finches. By comparing domesticated Bengalese finches with their wild strain, white-rumped munias, we found that female preferences for complex songs were coupled with domesticated relaxed environments to give rise to song complexity...
January 24, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28115690/hearing-regulates-drosophila-aggression
#16
Marijke Versteven, Lies Vanden Broeck, Bart Geurten, Liesbeth Zwarts, Lisse Decraecker, Melissa Beelen, Martin C Göpfert, Ralf Heinrich, Patrick Callaerts
Aggression is a universal social behavior important for the acquisition of food, mates, territory, and social status. Aggression in Drosophila is context-dependent and can thus be expected to involve inputs from multiple sensory modalities. Here, we use mechanical disruption and genetic approaches in Drosophila melanogaster to identify hearing as an important sensory modality in the context of intermale aggressive behavior. We demonstrate that neuronal silencing and targeted knockdown of hearing genes in the fly's auditory organ elicit abnormal aggression...
January 23, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28108929/jaboya-sex-for-fish-a-qualitative-analysis-of-contextual-risk-factors-for-extramarital-partnerships-in-the-fishing-communities-in-western-kenya
#17
Zachary A Kwena, Chris A Shisanya, Elizabeth A Bukusi, Janet M Turan, Shari L Dworkin, Grace A Rota, Isaac J Mwanzo
Extramarital partnerships exacerbate high HIV prevalence rates in many communities in sub-Saharan Africa. We explored contextual risk factors and suggested interventions to reduce extramarital partnerships among couples in the fishing communities on Lake Victoria, Kenya. We conducted 12 focus group discussions with 9-10 participants each (N = 118) and 16 in-depth interviews (N = 16) with fishermen and their spouses. Couples who participated were consented and separated for simultaneous gender-matched discussions/interviews...
January 20, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/28088703/dopaminergic-rules-of-engagement-for-memory-in-drosophila
#18
REVIEW
Karla R Kaun, Adrian Rothenfluh
Dopamine is associated with a variety of conserved responses across species including locomotion, sleep, food consumption, aggression, courtship, addiction and several forms of appetitive and aversive memory. Historically, dopamine has been most prominently associated with dynamics underlying reward, punishment, or salience. Recent emerging evidence from Drosophila supports a role in all of these functions, as well as additional roles in the interplay between external sensation and internal states and forgetting of the very memories dopamine helped encode...
January 12, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28088352/mutations-at-the-darkener-of-apricot-locus-modulate-pheromone-production-and-sex-behavior-in-drosophila-melanogaster
#19
Julien Fumey, Claude Wicker-Thomas
Mutations at the Darkener of Apricot (Doa) locus of Drosophila melanogaster alter sexual differentiation by disrupting sex-specific splicing of doublesex pre-mRNA, a key regulator of sex determination. Here, we study the effect of seven Doa alleles and several trans-heterozygous combinations on pheromones and courtship behavior. The cuticular hydrocarbon (CHC) profile was slightly masculinized in females, with an accumulation of shorter compounds (C23 and C25) and a reduction in longer compounds (C27 and C29)...
January 11, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28077286/assessment-of-neuroanatomical-and-behavioural-effects-of-in-ovo-methylmercury-exposure-in-zebra-finches-taeniopygia-guttata
#20
Maria S Yu, Margaret L Eng, Tony D Williams, Mélanie F Guigueno, John E Elliott
Methylmercury (MeHg) readily crosses the blood brain barrier and is a known neuro-toxicant. MeHg accumulation in the brain causes histopathological alterations, neurobehavioral changes, and impairments to cognitive motor functions in mammalian models. However, in birds the neurotoxic effects of MeHg on the developing pre-hatching brain and consequent behavioral alterations in adult birds have not received much attention. Moreover, passerine birds are poorly represented in MeHg neurotoxicology studies in comparison to other avian orders...
January 7, 2017: Neurotoxicology
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