Almost forty years after Adolf Portmann’s death, we welcome the publication of a collective monograph about the life and legacy of this unique zoologist and anthropologist. This work should be of interest to biologists who study the theoretical aspects of animal morphology or are interested in animal patterns, but also to philosophers of biology who investigate the aesthetic aspects of nature or the concept of organism. Intellectuals interested in these subjects – or non-mechanistic views of living beings in general – (...) are likely to be familiar with Portmann’s work, but this publication offers a look at various facets of his thought which are likely to be novel and of interest even to intellectuals already familiar with his thoughts. (shrink)

Morphology and its relevance for systematics is a promising field for the application of biosemiotic principles in scientific practice. Genital coupling in spiders involves very complex interactions between the male and female genital structures. As exemplified by two spider species,Nephila clavipesandNephila pilipes ssp. fenestrata, from a biosemiotic point of view the microstructures of the male bulb’s embolus and the corresponding female epigynal and vulval parts form the morphological zone of an intraspecific communication and sign-interpreting process that is one of the (...) prerequisites for sperm transfer. Hence these morphological elements are of high taxonomic value, as they play an essential role in mating and fertilization and consequently in establishing and preserving a reproductive community. Morphology clearly benefits from a biosemiotic approach, as biosemiotics helps to sort out species-specific morphological characters and to avoid problematic typological interpretations. (shrink)

This meta-study applies a socio-semiotic framework combining five basic communicational aspects, form, content, act, time, and space, developed to help answering the questionCan animals refer?It further operates with four levels, sign, utterance, genre, and lifeworld, studying relations between utterance and genre in particular. Semantic key terms found in an excerpted ‘resource collection’ consisting of three anthologies, two academic journals, and a monography, studying content in animal communication, are inspected, and discussed, especially information, functional reference, and reference. Since a temporary inspection (...) concluded that the field seems unable to give convincing joint answers, the scope of the meta-study was extended to include critical investigations of implicit communicational epistemologies applied in the sources. Two major challenges were brought to surface. Firstly, the problem of conflicting interrelatedness in animal utterances (parts versus whole). Positioning analyses revealed that theories and project-designs were mostly dyadic, prioritising form/content, content/function, or function/form, and rarely form/content/function, as a whole. The second concerned the issue of functional openness of animal communication systems. The meta-study found that more recent studies tend to reduce an essentialist search for ‘clear’ categories in favor of more complex designs, where focus is less on references in utterances as such and more on a species’ communicational system. This shift in turn leads to a problematisation of the role of context, kinds of communication (life-genres) and semantic levels in animal utterances, in other words, on animal communication for particular species as a whole. (shrink)

Variations in life history define key comparative and evolutionary biological questions, important for understanding the mechanisms of mammalian evolutionary divergence, developmental adaptability and plasticity. In this regard, the differences among predominantly altricial and precocial species represent a particularly significant, if still poorly understood and contested case. Here, it will be shown how the classical analysis of such ontogenetic variations, going back to the semantic biology of A. Portmann, can be expanded and synthesized with comparative physiological approaches, based on the negentropic (...) theory of ontogeny by I. A. Arshavsky and his school. In this little received but pioneering tradition, extensive comparative and experimental investigations were carried out on the role of musculoskeletal systems and stressors in driving life history variations, particularly in the altricial-precocial spectrum. As shown by Arshavsky and co-workers, by focusing on general allometric regularities, the approximations based on the classical energy rules of surface and mass offer valuable benchmarks, but also predictions that are frequently violated by the variability of physiological and metabolic scaling relationships among altricials and precocials, and thus, a complex and historical approach is needed to describe their local physiological mechanisms and systemic regularities. This paper shows how Arshavsky’s findings and framework can play an integrative role in this context, potentially helping to bridge the mainly descriptive approach of semantic morphology, as developed by Portmann’s school, with the more functional explanations predominating current ecology and life history theory. These problems can be important for biosemiotics by highlighting the contingent, activity-dependent, and surplus anabolic stress mechanisms underlying diversification in eutherian developmental systems and possibly, the epigenetic evolution of pace-of-life syndromes. (shrink)

Mimicry is often cited as a compelling demonstration of the power of natural selection. By adopting signs of a protected model, mimics usually gain a reproductive advantage by minimising the likelihood of being preyed upon. Yet while natural selection plays a role in the evolution of mimicry, it can be doubted whether it fully explains it. Mimicry is mediated by the emergence of formally analogous patterns between unrelated organisms and by the fact that these patterns are meaningfully perceived as similar. (...) The perception of similarity is always perceiver-dependent. Similarities between for instance colours are psychophysical phenomena, and their existence is conditioned by an intimate interdependence between perceivers and perceptible reality. In this sense, mimicry is by its very nature dualistic. The analogy in form needed to establish a mimicry does not emerge out of the blue. It depends on the ecological context and the morphogenetic potential of a species. In our proposal, we take into account both the developmental generators of formally analogous structures and the perceptual and cognitive processes that lead to the emergence of mimicry. We show that some of the rather controversial and nowadays largely neglected ideas found in non-Anglo-Saxon literature on mimicry deserve closer attention. We suggest that the diversity of mimicry types is due to differences in variational properties of form-generating and perceptual systems among diverse groups of organisms. We also anticipate that processes studied within social psychology and emotion research probably take place, at least in a simplified form, also in non-human animals. Finally, we argue that these meaning-attributive processes underlie the functionality of mimicry. (shrink)

The intricate appearances produced by various lineages of biota have long been viewed as calling for a rational explanation. Biologists are capable of interpreting still just a relatively small part of the overall range of organismal forms and patterns. In fact, we can explain only those for which we find a functional role. Kalevi Kull’s current initiative, which aims at establishing biosemiotic foundations of aesthetics and introduction of concepts such as semiotic fitting, may help us elucidate various hitherto largely neglected (...) aspects of self-expressive domains of life. Given that organisms are active autonomous agents, I suggest that some cases of semiotic fitting may be facilitated by semiotic co-option, a process where a trait is newly interpreted as meaningful within the umwelt of a living being and further adopted for a particular role. Clarification of connections between semiotic co-option and semiotic fitting may aid our attempts to better understand the role of meaning-attributive processes via which the aesthetic faculties of animate things come into existence. (shrink)

Appearance of Old world vipers of genus Vipera serves various purposes including crypsis and aposematism. Recent research showed that the zigzag pattern represents strong signal to predators to avoid vipers as a prey. It is also possible that vipers function within ecological community as Batesian model for numerous mimics, including other reptiles, birds, and invertebrates. It is then showed that Batesian models need to have prominent features to sustain the mimicry system. The main modulation of this system is presented here (...) as iconicity. Iconicity is treated as quantitative variable resulting from open dynamic process with multiple inputs, also including iconicity of previous states of system. Batesian mimicry is based on mimics adopting the iconicity of the model. It is an example of ecological facilitation, and as such, it is part of niche construction. Since Batesian mimicry is based on semiotic processes, it is a special case of ecological facilitation, namely semiotic facilitation. (shrink)

Turtles are among the most intriguing amniotes but their communication and signaling have rarely been studied. Traditionally, they have been seen as basically just silent armored ‘walking stones’ with complex physiology but no altruism, maternal care, or aesthetic perception. Recently, however, we have witnessed a radical change in the perception of turtle behavioral and cognitive skills. In our study, we start by reviewing some recent findings pertaining to various highly developed behavioral and cognitive patterns with special emphasis on turtles. Then (...) we focus on freshwater turtles and use data about their sexual behavior and size sexual dimorphism to test whether conspicuous coloration of the head is in these animals related to sexual processes. We found that absence of aggressive mating behavior is statistically associated with the presence of conspicuous coloration on turtles’ heads. It also seems that while species with female-biased SSD are characterised by conspicuously colored head ornaments, in species with male-biased SSD conspicuous coloration is absent. Unlike large females, males thus seem to be under pressure to develop conspicuous coloration and engage in non-aggressive behavior using signaling to succeed in courtship. And finally, we discuss possible roles of head color patterns in turtle communication during mating. (shrink)

In twentieth-century continental philosophy, German philosophical anthropology can be seen as a sort of conceptual laboratory devoted to human/animal research, and, in particular, to the discontinuity between human and non-human animals. Its main notion—the idea of the special position of humans in nature—is one of the first philosophical attempts to think of the specificity of humans as a natural and qualitative difference from non-human animals. This school of thought correctly rejects both the metaphysical and/or religious characterisations of humans, and the (...) positivistic gradualism, that sees the human being as an animal endowed with a greater degree of certain faculties. At the same time, German philosophical anthropology still takes it for granted that such natural-qualitative novelty is unique in the realm of the living, that in correspondence with humans there is the hiatus, the discontinuity par excellence. The semiotic side of this view is the distinction between signs and symbols developed by Ernst Cassirer and Susanne Langer: animal signs would be mere proxies for perceptive elements or stimuli, whereas only human symbols could convey complex representation of objects and situations. The goal of this contribution is to criticise the alleged uniqueness of the hiatus and its semiotic implications through the opposite approach of the diffuse discontinuities. This approach that focuses on the semiotic traits of different species-specific environments can be traced back to Jakob von Uexküll’s biosemiotical phenomenology, which thinks of discontinuities as a normal phenomenon of animal life. (shrink)

What we observe, through our usually limited lens, is that differential growing of space determines forms -characterized by their shape, size and coloration. As non-Euclidean geometrical mathematics have proclaimed: forms are manifestations of the curvature of space. Physics and other natural laws impose mathematical structural restrictions to biological forms. The molecules comprising any living form become arranged in specific ways in response to physical forces as well as chemical and biochemical conditions. Over time, such forms inherit additional historical restrictions that (...) make up their meaning, their semiotics. Color does not escape from this orthogenic reality. In this study, we present the colored pattern of the connexivum of Triatoma maculata, an insect vector of the etiologic agent of Chagas disease. This model is used as an example to appreciate mimicry under a heterodox and provocative approach. We unveil that beyond 1) mathematical and 2) historical semiotic restrictions of T. maculata mimesis of a yellowish-black alternating pattern, there are also 3) artistic interpretations; where metaphysics of life, beyond human perspective, is included. (shrink)