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  • Articles  (14)
  • Articles: DFG German National Licenses  (14)
  • Maculinea  (6)
  • constructivism  (6)
  • Meta-epistemological
  • Springer  (14)
  • Nature of Science, Research, Systems of Higher Education, Museum Science  (14)
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  • Articles  (14)
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  • Articles: DFG German National Licenses  (14)
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  • Springer  (14)
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  • 1
    ISSN: 1572-9753
    Keywords: chalk grassland (Gentiano-Koelerietum) ; Gentiana cruciata ; Myrmica ants ; Maculinea ; symbiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract The population biology of Maculinea rebeli Hirschke, 1904, on dry grassland biotypes in different successional stages was investigated in the summers of 1990 and 1991 in the district of Höxter (North Rhine–Westphalia, Germany). The population characteristics of M. rebeli were studied by mark-recapture and eggshell counts on the larval host plant Gentiana cruciata. Pitfall traps, ant baits, excavating and counting of ant nests were used to examine the Formicidae community and the nest density of Myrmica sabuleti. In 1990, the total population of M. rebeli was estimated as 528 individuals, with subpopulations varying from 2 to 273 individuals. Populations existed in areas differing in size and vegetation structure. However, the limiting factor for population size was the density of the host ant population. The differences in population size did not depend on the size of the habitat or the density of the larval food plant. The butterflies can switch their host. In the absence of M. schenki, the colonies of M. sabuleti can maintain M. rebeli populations. Adult males and females have a maximum life expectancy of 13 days. The females prefer to oviposit on G. cruciata plants of 10–30 cm height. Only plants which stuck out of the surrounding vegetation were oviposited on. The average number of eggs deposited per female was 100–150. Low density populations are probably most threatened. Therefore, future protective measures should work towards further maintaining and optimizing the habitats of the small populations, as well as creating the prerequisites so that dense stable populations of M. rebeli can develop.
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  • 2
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    Springer
    Journal of insect conservation 2 (1998), S. 79-84 
    ISSN: 1572-9753
    Keywords: captive breeding ; Maculinea ; Myrmica ; collection ; culture.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
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  • 3
    ISSN: 1572-9753
    Keywords: spatial modelling ; habitat heterogeneity ; Maculinea ; Myrmica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract A spatial computer simulation model has been developed to assist our understanding of the ways in which Maculinea butterflies depend upon the spatial distribution and abundance of their initial foodplant and their Myrmica host ant. It was initially derived for the Maculinea rebeli-Myrmica schencki-Gentiana cruciata system. It relates the population processes of the competing host and other ant species to an underlying gradient of habitat quality and incorporates the impact of adopted Maculinea caterpillars on the growth and survival of individual ant nests. The model was initially calibrated for a large site in the Spanish Pyrenees, but has since been successfully tested on 12 French sites and another in Spain. On such sites, with M. rebeli present, there is a close relationship between Maculinea population density and the density of the early larval foodplant G. cruciata. Optimum gentian density is estimated to be about 1500 plants ha-1 on sites with the natural clumping of gentians found. However, any site management which added extra gentians, especially if filling the gaps, is predicted to reduce the Maculinea population. Meta-population studies of single species have shown that the size and spatial arrangement of patches of assumed uniformly ‘suitable’ habitat can influence their population dynamics and persistence. Our modelling suggests that the spatial pattern of ‘suitable’ habitat of varied quality within a single site can influence the local butterfly population size and perhaps also persistence. Despite being free-ranging over the whole area, the butterfly's dynamics may depend on the arrangement of habitat quality at a finer spatial scale, due to its interactions with ant species possessing narrower habitat niches and more localized dispersal. © Rapid Science Ltd. 1998
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  • 4
    ISSN: 1572-9753
    Keywords: species ; Myrmica ; Maculinea ; morphology.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
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  • 5
    ISSN: 1572-9753
    Keywords: Myrmica ; Maculinea ; populations ; management ; host specificity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract Maculinea butterflies in Europe, and probably most of Asia, are host specific social parasites of various species of Myrmica ants. The latest summary of field data showing the pattern of host specificity by Maculinea is presented. Myrmica ants have been well studied in the laboratory but much less is known about the ecology of their natural populations. While the former is important in understanding the adaptive evolution of Maculinea larval behaviours, the latter is of more practical importance to conservationists charged with the protection of specific populations of Maculinea. The current knowledge of habitat partition, colony growth and colony reproduction within communities of Myrmica ants is summarized in relation to the ecology of Maculinea species. Concepts used in current population simulation models are explained. A key concept is the idea that community structure (both number of species and size and abundance of nests) is controlled by the quantity and quality of suitable nest sites. Some advice is given to conservationists who might need to manipulate Myrmica ant populations in order to maintain a robust population of a Maculinea species. © Rapid Science Ltd. 1998
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  • 6
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    Springer
    Journal of insect conservation 1 (1997), S. 99-111 
    ISSN: 1572-9753
    Keywords: Maculinea ; conservation ; genetic markers ; population structure.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract We have investigated the genetic population structure within and the genetic differentiation between local populations of the large blue butterfly Maculinea alcon throughout the Jutland peninsula. Samples were collected as eggs on foodplants (Gentiana pneumonanthe), and reared to 4th instar caterpillars in the laboratory. A significant excess of homozygotes was found for all the investigated allozyme loci in most of the populations. A North-South cline was observed for the allele frequencies at some of the loci and for several linkage groups. Because some of the allele frequency clines were parallel to clines in adult morphological variation, we interpret our results as evidence for the co-existence of at least two gene pools within the Danish Maculinea alcon populations. Multilocus electrophoretic data revealed highly positive but variable FST values, which under this scenario would reflect varying frequencies of the Maculinea gene pools across the local populations. The significantly positive FIS values indicate that these gene pools are at least partly reproductively isolated (Wahlund effect). The co-occurrence of several Maculinea alcon gene pools on many local sites in Jutland is of great importance for conservation of the fragmented Maculinea populations. Our results show that there is probably more Maculinea biodiversity to conserve than was previously thought, and suggests that extant populations are more fragmented and vulnerable than counts of flying adults or eggs on foodplants indicate.
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  • 7
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    Journal for general philosophy of science 27 (1996), S. 29-53 
    ISSN: 1572-8587
    Keywords: philosophy of science ; philosophy of language ; abstraction ; ideation ; materially-synthetic abstraction ; chemistry ; biology ; constructivism ; methodical philosophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary The methods of abstraction and ideation are indispensable tools to introduce new concepts in a scientific terminology. The latter is paradigmatically introduced within the ‘protophysical program’ whereas abstraction is commonly applied in logics and mathematics. The application within the reconstruction of chemistry and biology causes several problems. Ideation appears to be inadequate whereas the application of abstraction necessitates a critical and minute examination of the corresponding equivalence relations. These problems are solved by the introduction of the method ofmaterially synthetic (material-synthetische) abstraction which is exemplified by the introduction of the chemical concept of ‘substance’ (Stoff) and the biological concept of ‘hereditary factor’ (Erbanlage).
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  • 8
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    Journal for general philosophy of science 25 (1994), S. 17-49 
    ISSN: 1572-8587
    Keywords: Indirect Solution ; Justification ; Meta-epistemological ; Petitio Principii ; Theoretical Level ; Transcendental
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary The article analyses the meta-epistemological problem of the justification of a theory of knowledge. The first section is dedicated to the morphological reconstruction of the problem, the second presents a diagnosis of the problem in terms of a metatheoretical and logically non-contradictorypetitio principii and the third delineates the limits within which strategies for the treatment of the problem could be elaborated.
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  • 9
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    Journal for general philosophy of science 25 (1994), S. 71-87 
    ISSN: 1572-8587
    Keywords: philosophy of science ; chemistry ; protochemistry ; constructivism ; methodical philosophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary Protochmeistry. The Program of a Methodical Foundation of Chemistry. “Protochemistry” — in analogy to protophysics — is sketched as the program of a methodical foundation of chemistry. “Foundation” means to reconstruct the methods (both linguistic and poietic) which lead from the prescientific every-day-practice of mastering properties of substances to scientific theories of modern chemistry. Four types of chemical terms are distinguished, depending on different methods of definition and different areas of reference. Consequences of the program if realized are pointed out.
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  • 10
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    Journal for general philosophy of science 24 (1993), S. 205-233 
    ISSN: 1572-8587
    Keywords: Diallelus ; Foundationalism ; Justification ; Meta-epistemological ; Petitio Principii ; Scepticism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary The article concerns the meta-epistemological problem of the justification of a theory of knowledge and provides a reconstruction of the history of its formulations. In the first section, I analyse the connections between Sextus Empiricus'diallelus, Montaigne'srouet and Chisholm's “problem of criterion”; in the second section I focus on the link between thediallelus and the Cartesian circle; in the third section I reconstruct the origin of “Fries' trilemma”; finally, in the last section I draw some general conclusions about the issuequa a general problem for a theory of knowledge.
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  • 11
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    Journal for general philosophy of science 23 (1992), S. 45-60 
    ISSN: 1572-8587
    Keywords: critical philosophy of science ; constructivism ; critical theory of society ; finalization ; social natural science ; projective methodology of science
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary It is the purpose of this paper to represent an analysis of four variants of critical philosophy of science: the constructivistic methodology, the reflexion upon science from the viewpoint of the critical theory of society, the ‘social natural science’ as a further development of the finalization conception, and the projective philosophy of science. Special attention is paid to the comparison of these variants. Some points of convergence as well as of divergence among them are revealed. A common shortcoming is indicated.
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  • 12
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    Journal for general philosophy of science 23 (1992), S. 265-288 
    ISSN: 1572-8587
    Keywords: Evolutionary Epistemology ; Genetic Epistemology ; cognition (human knowledge) ; theories of truth ; explanation of validity claims by genetic means ; adaptation ; unity of selection ; reality ; constructivism ; relativism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary This essay is a discussion of Eve-Marie Engels' view on Evolutionary Epistemology (EE). In the first part two of the main doctrines of EE are criticized: (1.) that validity of human knowledge is to be explained as the result of evolutionary adaptation; yet (2.), that human cognitive capacities had been adequate to our ancestors life conditions but fail in relevant situations of modern world. In the second part the concept of reality underlying EE's adaptational view is discussed and compared with Jean Piaget's concept of reality. Finally, it is held that some of the questions recently raised by proponents of EE, far from being new, have been dealt with already in historical epistemology.
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  • 13
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    Journal for general philosophy of science 23 (1992), S. 323-352 
    ISSN: 1572-8587
    Keywords: constructivism ; naturalism ; epistemology ; realism ; idealism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary Both radical constructivism and constructionism are naturalized approaches to epistemology. They try to fertilize results from biology and psychology for epistemological aims. They both refuse epistemological realism as unsustainable metaphysics. This raises the problem of the range of the naturalistic approach to epistemology. Constructivism, in both forms, turns out to be untenable because it runs in an aporia: it must borrow from realism either, or it must qualify its own position as a metaphysical one. But therewith, constructivism would be blamed to be metaphysical itself.
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  • 14
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    Journal for general philosophy of science 21 (1990), S. 75-104 
    ISSN: 1572-8587
    Keywords: constructivism ; object, theory, practice, empirical sciences ; substance, process, practical action,quasi-action
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary The following considerations are guided by the assumption that the objects of any scientific empirical theory are constructs as well as the theories themselves, the construction of these object-constructs being fundamentally dependent on the theories' functioning in the provision of practically relevant empirical explanations. The relevance of these explanations consists in their contribution to the improvement of at least one practical capacity through enabling the invention of at least one improving kind of practical actions. In an excursus on the origination and the development of the notion of theory within human history the view is held, in contrast to Aristotle, that theorization has always aimed at practical relevance, however in a broader sense of “practical” than that in which Aristotle uses the term “πρακτλκóχ”, and that only the practical functions of theory-construction have changed over the times, and their object-constructs correspondingly. The latest form of theory with the above-mentioned function in the development of social practice is the scientificexplanatory empirical theory with thedescriptive empirical theory now no longer fulfilling a practical function of its own, but only a service-function of data acquisition for the explanatory theory. The object-constructs of strictly scientific empirical theories in the sense of explanatory theories for the improvement of practical capacities are here considered to be empiricalquasi-actions, those of the dependent descriptive empirical theories eitherquasi-instruments orquasi-products orquasi-materials of the respective kind ofquasi-actions of the explanatory theory. The empiricalquasi-action is here conceived as the latest in a sequence of developing object-constructs that have resulted from different and successively more effective attempts at better survival of human beings and even from prehuman stages of evolution. The author envisages a differentiation of empiricalquasi-actions into further sub-categories to provide the conceptual bases for the construction of objects of new kinds of scientific explanatory empirical theories that might become practically relevant for the improvement of new kinds of practical capacities to be preferably improved for the advancement of social practice: Beside the already relevant category ofempirical processes (as I named it) are here proposed the further categories ofempirical originations of meaning and ofempirical organizations of practical actions as conceptual bases for object-constructs of future scientific empirical theories.
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