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Evolutionary Interpretation (evolutionary + interpretation)

Distribution by Scientific Domains
Life Sciences60%
Humanities and Social Sciences40%

Selected Abstracts

Holes in the head: Evolutionary interpretations of the paranasal sinuses in catarrhines

EVOLUTIONARY ANTHROPOLOGY, Issue 6 2004
Todd C. Rae
Everyone who has ever experienced a head cold is familiar with the paranasal sinuses, the bony hollows above and beside the nasal cavity that contribute, sometimes painfully, to upper respiratory tract disorders. These internal cranial structures have a wide distribution among eutherian mammals and archosaurs.1, 2 Sinuses have languished somewhat in the shadow of their better known and more accessible morphological cousins (dentition, postcrania), but new imaging techniques, growth studies, and explicit phylogenetic evaluation3 are beginning to fill in the gaps in our knowledge of the evolution of these enigmatic spaces in primates and promise to yield insights into the evolution of the facial skeleton. [source]

Applications of Game Theory in Linguistics

LINGUISTICS & LANGUAGE COMPASS (ELECTRONIC), Issue 3 2008
Gerhard Jaeger
The article gives a brief overview over the budding field of game theoretic linguistics, by focusing on game theoretic pragmatics on the one hand, and the usage of evolutionary game theory to model cultural language evolution on the other hand. Two specific applications are discussed in detail: the derivation of scalar implicatures via rational reasoning over communicative strategies, and the predictive potential of an evolutionary interpretation of exemplar dynamics in phonetics. [source]

The Evolutionary Forms of the Religious Life: A Cross-Cultural, Quantitative Analysis

AMERICAN ANTHROPOLOGIST, Issue 4 2008
STEPHEN K. SANDERSON
ABSTRACT, Previous cross-cultural studies of religion's evolution that employed Swanson's High Gods measure are plagued by methodological difficulties, especially the lack of proper statistical controls. Here, we attempted to rectify this, using the Standard Cross-Cultural Sample to test five hypotheses employing multivariate statistical techniques. Results provided weak support for Swanson's Sovereign Groups hypothesis concerning High Gods and also limited support for a previously unexplored factor: writing and record keeping. In phase two of the study, we introduced a new measure, the Stage of Religious Evolution, based on Anthony Wallace's typology. When this new dependent variable was substituted for High Gods, much stronger results were obtained. The best predictors of Stage of Religious Evolution were mode of subsistence economy, writing and record keeping, and total population size. These findings allowed us to construct a new evolutionary interpretation of the development of different modes of religious life. [source]

Evolutionary morphology of the circulatory system in Peracarida (Malacostraca; Crustacea)

CLADISTICS, Issue 2 2010
Christian S. Wirkner
We demonstrate that by formulating guidelines for evolutionary morphology the transparency, reproducibility, and intersubject testability of evolutionary hypotheses based on morphological data can be enhanced. The five main steps in our concept of evolutionary morphology are (i) taxon sampling, (ii) structural analysis, (iii) character conceptualization, (iv) phylogenetic analysis, and (v) evolutionary interpretation. We illustrate this concept on the example of the morphology of the circulatory organs in peracarid Malacostraca. The analysis is based on recently published accounts in which detailed structural analyses were carried out, and on the older literature. Detailed conceptualizations of 22 characters of the circulatory system are given for 28 terminals. In a further step these characters are included in a recently revised matrix, resulting in 110 characters. The resulting parsimony analysis yielded a single most parsimonious tree with a length of 309 steps. The most significant results are that Peracarida is monophyletic, Amphipoda is the sister taxon to the Mancoida sensu stricto, the relict cave-dwelling taxa Thermosbaenacea, Spelaeogriphacea, and Mictocarididae form a monophylum and Tanaidacea is the sister group to a monophylum comprising Cumacea and Isopoda. The evolutionary analysis shows that the ground pattern features of the circulatory organs in Peracarida are a tubular heart extending through the whole thorax, a posterior aorta with lateral arteries, and a ventral vessel system. Important features within the Peracarida are the backward shift of the anterior border of the heart, the reduction of the ventral vessel system, and two patterns of cardiac arteries, one common to the amphipod and tanaidacean terminals, and one to the cumacean and isopod terminals. ,© The Willi Hennig Society 2009. [source]

Chordate phylogeny and evolution: a not so simple three-taxon problem

JOURNAL OF ZOOLOGY, Issue 2 2008
T. Stach
Abstract Traditional concepts of chordate phylogeny have recently been in turmoil: in a large-scale molecular study, the traditional hypothesis that cephalochordates are sister taxon to craniates was replaced by the hypothesis of a sister group relationship between tunicates and craniates. It was claimed that the morphological evidence that supported traditional phylogeny was weak and that morphological characters at least equally strong could be mustered in support of the ,new phylogeny.' In the present review, it is shown that the uncritical use of published codings of morphological characters in recent phylogenetic analyses is responsible for this perception. To ameliorate this situation, the main focus of the present publication is a review of the morphological evidence that has been deemed relevant in chordate phylogeny. Characters are presented in enough detail to allow readers to make self-reliant informed decisions on character coding. I then analyze these characters cladistically, and it is demonstrated that support of the traditional hypothesis is substantial. I briefly evaluate molecular systematic studies and criticize ,evo-devo' studies for lack of cladistic rigor in the evolutionary interpretations of their data by (1) failing to formally code their characters (2) failing to subject their data to the congruence test with other characters, the crucial test in phylogenetic analyses. Finally, a short and by necessity eclectic discussion of suggested evolutionary scenarios is presented. [source]