Differentiated Anti-Predation Responses in a Superorganism

Insect societies are complex systems, displaying emergent properties much greater than the sum of their individual parts. As such, the concept of these societies as single ‘superorganisms’ is widely applied to describe their organisation and biology. Here, we test the applicability of this concept to the response of social insect colonies to predation during a vulnerable period of their life history. We used the model system of house-hunting behaviour in the ant Temnothorax albipennis. We show that removing individuals from directly within the nest causes an evacuation response, while removing ants at the periphery of scouting activity causes the colony to withdraw back into the nest. This suggests that colonies react differentially, but in a coordinated fashion, to these differing types of predation. Our findings lend support to the superorganism concept, as the whole society reacts much like a single organism would in response to attacks on different parts of its body. The implication of this is that a collective reaction to the location of worker loss within insect colonies is key to avoiding further harm, much in the same way that the nervous systems of individuals facilitate the avoidance of localised damage.     

Steps to a Semiotics of Being

The following points, which represent a path to a semiotics of being, are pertinent to various sub-fields at the conjunction of semiotics of nature (biosemiotics, ecosemiotics, zoosemiotics) and semiotics of culture—semioethics and existential semiotics included. 1) Semiotics of being entails inquiry at all levels of biological organization, albeit, wherever there are individuals, with emphasis on the living qua individuals (integrated biological individualism). 2) An Umwelt is the public aspect (cf. the Innenwelt, the private aspect) of a phenomenal/experienced world that is organism-specific (rather than species-specific) and ultimately refers to an existential realm. 3) Existential universals at work on Earth include seeking out the edible, dwelling in a medium, holding a phenomenal world (possibly an Umwelt) and being endowed with life, and consequently being mortal. 4) Human Umwelten include speechless Umwelten, spoken Umwelten and alphabetic Umwelten. 5) An Uexküllian phenomenology—stating that semiotic states represent the general class to which all mental/cognitive states belong—can draw on the works of the phenomenologists David Abram and Ted Toadvine (The notion of semiotic states is treated in Tønnessen 2009a: 62–63. For an introduction to eco-phenomenology, see Brown and Toadvine (eds.) 2003). 6) A task for such a phenomenology is to portray the natural history of the phenomenal world. 7) An imperative task in our contemporary world of faltering biological diversity is that of Umwelt mapping, i.e. a mapping of ontological niches. 8) The ecological crisis is an ontological crisis with historical roots in humankind’s domestication of animals and plants, which can be taken as archetypical for our attempted planet-scale taming of the wild. 9) The process of globalization is expressed by correlated trends of depletion of semiotic diversity and semiotic diversification. 10) Semiotic economy is a field which task it is to map the human ontological niche insofar as its semiotic relations are of an economic nature. All ten points will be commented (explicitly or implicitly) in due time.     

Receptor Oligomerization as a Process Modulating Cellular Semiotics

The majority of G protein-coupled receptors (GPCRs) self-assemble in the form dimeric/oligomeric complexes along the plasma membrane. Due to the molecular interactions they participate, GPCRs can potentially provide the framework for discriminating a wide variety of intercellular signals, as based on some kind of combinatorial receptor codes. GPCRs can in fact transduce signals from the external milieu by modifying the activity of such intracellular proteins as adenylyl cyclases, phospholipases and ion channels via interactions with specific G-proteins. However, in spite of the number of cell functions they can actually control, both GPCRs and their associated signal transduction pathways are extremely well conserved, for only a few alleles with null or minor functional alterations have so far been found. This would seem to suggest that, beside a mechanism for DNA repairing, there must be another level of quality control that may help maintaining GPCRs rather stable throughout evolution. We propose here receptor oligomerization to be a basic molecular mechanism controlling GPCRs redundancy in many different cell types, and the plasma membrane as the first hierarchical cell structure at which selective categorical sensing may occur. Categorical sensing can be seen as the cellular capacity for identifying and ordering complex patterns of mixed signals out of a contextual matrix, i.e., the recognition of meaningful patterns out of ubiquitous signals. In this context, redundancy and degeneracy may appear as the required feature to integrate the cell system into functional units of progressively higher hierarchical levels.     

The Semiotics of Culture and the Concept of a Text

Two tendencies are ascertainable in the development of semiotics over the past 15 years. One has been toward refinement of the initial concepts and definition of procedures of generation. The striving for precise modeling procedures has led to the creation of metasemiotics: the object of study becomes not texts as such, but models of texts, models of models, etc. The second tendency concentrates its attention on the semiotic functioning of a real text. Whereas in the first case contradiction, structural inconsistency, the accommodation of differently structured texts within single textual formation, and semantic indeterminacy are random and nonfunctional attributes that can be removed at the metalevel of text modeling, from the second standpoint they are the object of special attention. Using Saussurean terminology, we might say that in the first case it is langage that interests the investigator as a materialization of the structural laws of a langue; in the second case it is those semiotic aspects of a text that diverge from the linguistic structure that are the object of attention. Whereas the first tendency is materialized in metasemiotics, the second by nature gives birth to the semiotics of culture.     

Semiotics and the placebo effect

Despite substantial progress in elucidating its neurobiological mechanisms, theoretical understanding of the placebo effect is poorly developed. Application of the semiotic theory developed by the American philosopher Charles Peirce offers a promising account of placebo effects as involving the apprehension and response to signs. The semiotic approach dovetails with the various psychological mechanisms invoked to account for placebo effects, such as conditioning and expectation, and bridges the biological and cultural dimensions of this fascinating phenomenon.     

Semiotics and the Technique of Empathy

The subject of this research is one of the basic units of the psychotechnical theory of psychotherapy developed by the author, “immediate experience–empathy.” The structure of empathy is analyzed as a therapist's communicative act. This structure includes a number of elements—an operator of understanding, a mode of experiencing, a sign of experiencing, and so forth. The possibilities for modifying empathic responses and the functions of these modifications in the psychotherapeutic process are considered. Special attention is given to semiotic and expressive aspects of empathy.     

Molecular Semiotics toward the Emergence of Life

Molecular imprints of organisms serving as both the agents and the products of the underlying sign activities are quantum mechanical in their origins. In particular, molecules in any reaction networks constituting a biological organism are semiotic or context-dependent in the sense that their activities reside within the proper coordination of the entire networks. The origin of life could have been related to a specific aspect of molecular semiotics, especially in the transition from molecules as the physical symbols of material units to molecules as the semiotic signs having the capacity of pointing to something else other than the molecules themselves. Quantum mechanical underpinning of the molecular imprints leading to the emergence of life is in the appraisal of the material capacities of both coherent assimilation and decoherent dissociation already latent in the imprints. One empirical evidence suggesting the likelihood of both coherent assimilation and decoherent dissociation in prebiotic settings could have been found in synthetic chemical reactions running in hydrothermal circulation of seawater through hot vents in the Haedean ocean on the primitive Earth.     

Composite Agency: Semiotics of Modularity and Guiding Interactions

Principles of constructivism are used here to explore how organisms develop tools, subagents, scaffolds, signs, and adaptations. Here I discuss reasons why organisms have composite nature and include diverse subagents that interact in partially cooperating and partially conflicting ways. Such modularity is necessary for efficient and robust functionality, including mutual construction and adaptability at various time scales. Subagents interact via material and semiotic relations, some of which force or prescribe actions of partners. Other interactions, which I call “guiding”, do not have immediate effects and do not disrupt the evolution and learning capacity of partner agents. However, they modify the extent of learning and evolutionary possibilities of partners via establishment of scaffolds and constraints. As a result, subagents construct reciprocal scaffolding for each other to rebalance their communal evolution and learning. As an example, I discuss guiding interactions between the body and mind of animals, where the pain system adjusts mind-based learning to the physical and physiological constraints of the body. Reciprocal effects of mind and behaviors on the development and evolution of the body includes the effects of Lamarck and Baldwin.     

Making Science Accessible: A Semiotics of Scientific Communication

This article serves as a demonstration of how certain models of literary analysis, used to theorize and analyze fiction and narrative, can also be applied to scientific communication in such a manner as to promote the accessibility of science to the general public and a greater awareness of the methodology used in making scientific discovery. The approach of this article is based on the assumption that the principles of structuralism and semiotics can provide plausible explanations for the divide between the reception of science and literature. We provide a semiotic analysis of a scientific article that has had significant impact in the field of molecular biology with profound medical implications. Furthermore, we show how the structural and semiotic characteristics of literary texts are also evident in the scientific papers, and we address how these characteristics can be applied to scientific prose in order to propose a model of scientific communication that reaches the public. By applying this theoretical framework to the analysis of both scientific and literary communication, we establish parallels between primary scientific texts and literary prose.     

Firefly Femmes Fatales: A Case Study in the Semiotics of Deception

Mimicry and deception are two important issues in studies about animal communication. The reliability of animal signs and the problem of the benefits of deceiving in sign exchanges are interesting topics in the evolution of communication. In this paper, we intend to contribute to an understanding of deception by studying the case of aggressive signal mimicry in fireflies, investigated by James Lloyd. Firefly femmes fatales are specialized in mimicking the mating signals of other species of fireflies with the purpose of attracting responding males to become their prey. These aggressive mimics are a major factor in the survival and reproduction of both prey and predator. It is a case of deception through active falsification of information that leads to efficient predation by femmes fatales fireflies and triggered evolutionary processes in their preys’ communicative behaviors. There are even nested coevolutionary interactions between these fireflies, leading to a remarkable system of deceptive and counterdeceptive signaling behaviors. We develop here a semiotic model of firefly deception and also consider ideas advanced by Lloyd about the evolution of communication, acknowledging that deception can be part of the explanation of why communication evolves towards increasing complexity. Increasingly complex sign exchanges between fireflies evolve in an extremely slow pace. Even if deceptive maneuvers are played out time and time again between particular firefly individuals, the evolution of the next level of complexity—and thus the next utterance in the dialogue between species—is likely to take an immense amount of generations.