We are entering one of the most exciting periods in the study of chemical communication since the first pheromones were identified some 40 years ago. This rapid progress is reflected in this book, the first to cover the whole animal kingdom at this level for 25 years. The importance of chemical communication is illustrated with examples from a diverse range of animals including humans, marine copepods, Drosophila, Caenorhabditis elegans, moths, snakes, goldfish, elephants and mice. It is designed to be advanced, but at the same time accessible to readers whatever their scientific background. For students of ecology, evolution and behaviour, this book gives an introduction to the rapid progress in our understanding of olfaction at the molecular and neurological level. In addition, it offers chemists, molecular and neurobiologists an insight into the ecological, evolutionary and behavioural context of olfactory communication.

/pdf/pheromones-and-animal-behaviour-communication-by-smell-and-59iqj6ahtw.pdf

Pheromones and Animal Behaviour: Communication by Smell and Taste

Although referred to in passing in several places, there have been few attempts to specify the functions of the human olfactory system. This article presents an initial effort at identifying and categorizing these functions, using 3 sources of information as a guide: 1) losses experienced by anosmic participants; 2) olfactory function in other mammals; and 3) capacity, namely, whether the human olfactory system can support the suggested function and whether there is evidence that it does. Three major classes of function were identified, relating to Ingestion (Detection/identification prior to ingestion; Detection of expectancy violations; Appetite regulation; Breast orientation and feeding), Avoiding environmental hazards (Fear related; Disgust related), and Social communication (Reproductive [inbreeding avoidance, fitness detection in prospective mates]; Emotional contagion [fear contagion, stress buffering]). These suggested functions were then examined with respect to 1) issues of ecological validity in human olfactory research; 2) their impact on olfactory loss; and 3) their general and specific implications for the study of human olfaction.

/pdf/an-initial-evaluation-of-the-functions-of-human-olfaction-2weocuy188.pdf

An Initial Evaluation of the Functions of Human Olfaction

Some Sort of Species Certain populations of bacteria are known to show ecological differentiation, but how this happens has remained controversial. Shapiro et al. (p. 48; see the Perspective by Papke and Gogarten) examined whole-genome sequences from ecologically divergent Vibrio populations and found that genes and genome regions containing so-called “eco-SNPs” (single-nuleotide polymorphisms) have swept through populations. These regions differentiate the bacteria genetically, apparently according to the type of substratum on which they live. Subsequently, tight genotypic clusters may have emerged as a result of preferential recombination occurring within particular habitats. Although specialization into different habitats may reduce gene flow between bacterial populations, the bacteria will always remain open to taking up DNA from other populations and so they cannot be said to be species in the eukaryotic sense. Ecologically separated Vibrio populations diverge by gene-specific rather than genome-wide selective sweeps. Genetic exchange is common among bacteria, but its effect on population diversity during ecological differentiation remains controversial. A fundamental question is whether advantageous mutations lead to selection of clonal genomes or, as in sexual eukaryotes, sweep through populations on their own. Here, we show that in two recently diverged populations of ocean bacteria, ecological differentiation has occurred akin to a sexual mechanism: A few genome regions have swept through subpopulations in a habitat-specific manner, accompanied by gradual separation of gene pools as evidenced by increased habitat specificity of the most recent recombinations. These findings reconcile previous, seemingly contradictory empirical observations of the genetic structure of bacterial populations and point to a more unified process of differentiation in bacteria and sexual eukaryotes than previously thought.

Population Genomics of Early Events in the Ecological Differentiation of Bacteria

Though it has long been known that animal communication is complex, recent years have seen growing interest in understanding the extent to which animals give multicomponent signals in multiple modalities, and how the different types of information extracted by receivers are interpreted and integrated in animal decision-making. This interest has culminated in the production of the present special issue on multimodal communication, which features both theoretical and empirical studies from leading researchers in the field. Reviews, comparative analyses, and species-specific empirical studies include manuscripts on taxa as diverse as spiders, primates, birds, lizards, frogs, and humans. The present manuscript serves as both an introduction to this special issue, as well as an introduction to multimodal communication more generally. We discuss the history of the study of complexity in animal communication, issues relating to defining and classifying multimodal signals, and particular issues to consider with multimodal (as opposed to multicomponent unimodal) communication. We go on to discuss the current state of the field, and outline the contributions contained within the issue. We finish by discussing future avenues for research, in particular emphasizing that ‘multimodal’ is more than just ‘bimodal’, and that more integrative frameworks are needed that incorporate more elements of efficacy, such as receiver sensory ecology and the environment.

An introduction to multimodal communication

Verbal and nonverbal communication are seen in terms of interacting streams of spontaneous and symbolic communication, and posed “pseudo-spontaneous” displays. Spontaneous communication is defined as the nonintentional communication of motivational-emotional states based upon biologically shared nonpropositional signal systems, with information transmitted via displays. Symbolic communication is the intentional communication, using learned, socially shared signal systems, of propositional information transmitted via symbols. Pseudospontaneous communication involves the intentional and strategic manipulation of displays. An original meta-analysis demonstrates that, like verbal symbolic communication, nonverbal analogic (pantomimic) communication is related to left hemisphere cerebral processing. In contrast, spontaneous communication is related to the right hemisphere. A general theory of communication should account for the natural biologically based aspects of communication as well as its learned and symbolically structured aspects. Further, such a general theory should include a feedback process—explanations of message production alone or message reception alone, although potentially useful, are incomplete. A corollary of these two criteria is that a general theory of communication should account for the coevolution of symbolic and nonsymbolic feedback processes and their integration into systems of communication characteristic of the human species. Whereas the explication of such a general theory is beyond the scope of this article, developmental interactionist theory (Buck, 1984, 1989, 1994) does aim to offer such an integrated view. The current article poses how developmental interactionist theory deals with the topic of this special issue of Journal of Communication—the relationship between verbal and nonverbal communication.

Verbal and Nonverbal Communication: Distinguishing Symbolic, Spontaneous, and Pseudo-Spontaneous Nonverbal Behavior

"This is science at its best, with adventure, ideas, and lots of facts". -- Helen Fisher"A treasure hunt through history, literature, and scientific data". -- Gina Ogden

The Scent of Eros: Mysteries of Odor in Human Sexuality

The across-species genetic conservation of intercellular and extracellular chemical communication enables unicellular and multicellular organisms to functionally distinguish between self and non-self. Non-self olfactory/pheromonal input from the social environment elicits a vertebrate neuroendocrine response. The organization and activation of this neuroendocrine response modulates the concurrent maturation of the mammalian neuroendocrine system, the reproductive system, and the central nervous system during the development of sexual preferences that may be expressed in sexual behavior. Psycho-physiological mechanisms for the development of these sexual preferences include focus on unconscious affects that are detailed in reciprocal cause and effect relationships. Olfactory/pheromonal conditioning elicits neuroendocrine effects accompanied by unconscious affects on the development of sexual preferences. Integrating these unconscious affects extends to humans a developmental model of behavior that...

The Mind's Eyes

Background : The prenatal migration of gonadotropin-releasing hormone (GnRH) neurosecretory neurons allows nutrients and human pheromones to alter GnRH pulsatility, which modulates the concurrent maturation of the neuroendocrine, reproductive, and central nervous systems, thus influencing the development of ingestive behavior, reproductive sexual behavior, and other behaviors. Methods : This model details how chemical ecology drives adaptive evolution via: (1) ecological niche construction, (2) social niche construction, (3) neurogenic niche construction, and (4) socio-cognitive niche construction. This model exemplifies the epigenetic effects of olfactory/pheromonal conditioning, which alters genetically predisposed, nutrient-dependent, hormone-driven mammalian behavior and choices for pheromones that control reproduction via their effects on luteinizing hormone (LH) and systems biology. Results : Nutrients are metabolized to pheromones that condition behavior in the same way that food odors condition behavior associated with food preferences. The epigenetic effects of olfactory/pheromonal input calibrate and standardize molecular mechanisms for genetically predisposed receptor-mediated changes in intracellular signaling and stochastic gene expression in GnRH neurosecretory neurons of brain tissue. For example, glucose and pheromones alter the hypothalamic secretion of GnRH and LH. A form of GnRH associated with sexual orientation in yeasts links control of the feedback loops and developmental processes required for nutrient acquisition, movement, reproduction, and the diversification of species from microbes to man. Conclusion : An environmental drive evolved from that of nutrient ingestion in unicellular organisms to that of pheromone-controlled socialization in insects. In mammals, food odors and pheromones cause changes in hormones such as LH, which has developmental affects on pheromone-controlled sexual behavior in nutrientdependent reproductively fit individuals across species of vertebrates. Keywords : nutrition; metabolism; odors; adaptation; evolve (Published: 14 June 2013) Citation: Socioaffective Neuroscience & Psychology 2013, 3 : 20553 - http://dx.doi.org/10.3402/snp.v3i0.20553

Nutrient-dependent/pheromone-controlled adaptive evolution: a model

Background: Olfactory cues directly link the environment to gene expression Two types of olfactory cues, food odors and social odors, alter genetically predisposed hormone-mediated activity in the mammalian brain Methods: The honeybee is a model organism for understanding the epigenetic link from food odors and social odors to neural networks of the mammalian brain, which ultimately determine human behavior Results: Pertinent aspects that extend the honeybee model to human behavior include bottom-up followed by top-down gene, cell, tissue, organ, organ-system, and organism reciprocity; neurophysiological effects of food odors and of sexually dimorphic, species-specific social odors; a model of motor function required for social selection that precedes sexual selection; and hormonal effects that link current neuroscience to social science affects on the development of animal behavior Conclusion: As the psychological influence of food odors and social orders is examined in detail, the socioaffective nature of olfactory cues on the biologically based development of sexual preferences across all species that sexually reproduce becomes clearer Keywords: behavior; development; evolution; odors; food; social; sexual; epigenetic; olfaction; pheromones; hormones; environment; animal; affect; effect; neuroscience (Published: 15 March 2012) Citation: Socioaffective Neuroscience & Psychology 2012, 2 : 17338 - DOI: 103402/snpv2i017338

https://www.tandfonline.com/doi/pdf/10.3402/snp.v2i0.17338

Human pheromones and food odors: epigenetic influences on the socioaffective nature of evolved behaviors.

(a mammalian model of thermodynamics and organism-level thermoregulation)
This model refutes a book-length revision of a theory: ‘Mutation-driven evolution’
CHEMICAL ECOLOGY; SYSTEMS BIOLOGY; ACROSS SPECIES COMPARISONS
Examples of nutrient-dependent amino acid substitutions clarify the involvement ofseemingly futile thermodynamic control of intracellular and intermolecularinteractions, which result in de novo creation of olfactory receptor genesThermodynamically controlled cycles of RNA transcription and protein degradationare responsible for organism-level changes in pheromone production, which enableaccelerated changes in the miRNA/mRNA balance and thermoregulation of controllednutrient-dependent adaptive evolution

Nutrient-dependent/pheromone-controlled adaptive evolution

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