Volumen 1 Issue 1 Year 2003

2020-03-28T21:19:01+02:00octubre 26th, 2019|Volumen 1. Issue 1. Year 2003.|

Introduction to a New Journal for Taphonomic Research.

Manuel Domínguez-Rodrigo, Travis Rayne Pickering, Luis Alcalá.

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Quantification and Sampling of Faunal Remains in Owl Pellets.

R. Lee Lyman, Emma Power, R. Jay Lyman.


[+info] VOLUME 1. ISSUE 1. APRIL 2003 (2 issue)

Paleozoologists and taphonomists have long recognized various properties of quantification and sampling with respect to collections they study. Those same properties attend samples of modern owl pellets. The particular skeletal elements identified and the way in which prey remains are grouped for tallying both influence measures of relative prey abundance in a collection of 56 barn-owl (Tyto alba) pellets from southeastern Washington. As the number of prey and the number of pellets in a collection increases across 107 published collections of North American barn-owl pellets, the richness of mammalian genera per collection increases. As the size of the most abundant prey taxon in a pellet collection decreases, the average number of individual prey per pellet increases. Pellets with more identifiable mammalian remains contain more individual prey. Larger pellets contain more individual prey than smaller pellets. These observations indicate that the properties of quantification and sampling so well known to paleozoologists can be created during the biostratinomic phase of a taphonomic history. Modern owl pellets are an excellent educational resource for teaching principles of taphonomy and zooarchaeology.

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Large Mammal Skeletal Element Transport: Applying Foraging Theory in a Complex Taphonomic System.

Curtis W. Marean, Naomi Cleghorn


[+info] VOLUME 1. ISSUE 1. APRIL 2003 (3 issue)

The transport and processing of large mammal carcasses by humans seems to provide a perfect data-set for the application of foraging theory. However, such applications in archaeology have generally been unsuccessful in that the results diverge widely from the predictions of foraging theory, and ethnographic applications have been rare and the results mixed. These applications require good estimates of skeletal element return rates, but to date we have insufficient net return rate data. Using some basic parameters we can rank skeletal elements by gross return rate, and classify them into high cost and low cost elements. We examine three of the best data-sets on hunter-gatherer skeletal element transport (Hadza, Nunamiut, and Kua), and find that the Nunamiut and Kua data diverge significantly from the Hadza data. We argue that this difference is not due to differences in skeletal element transport, but rather that the Hadza data-set represents observed instances of transport while the Nunamiut and Kua data-sets represent discarded bone assemblages that were scavenged by carnivores. Thus the Nunamiut and Kua sets represent a first stage in bone destruction after discard by people, and this would be followed by further destruction as such assemblages are transformed into archaeological samples. This result, when joined to taphonomic data on skeletal element survival, leads to a general model of bone survival that separates skeletal elements into two groups: 1) a low-survival set defined by a lack of non-cancellous thick cortical portions, and 2) a high-survival set defined by the presence of thick cortical bone portions lacking cancellous bone. The archaeological representation of the low survival set is primarily the product of post-discard destructive processes, and most low survival elements also belong to the high cost set. The relative abundance of the high survival elements in archaeological contexts is primarily the product of what was discarded after processing, and most of these belong to the low cost set. Foraging theory needs to be linked to the realities of skeletal element survival and destruction as understood in taphonomy, connecting the general and middle range theory, respectively. We need a synthetic taphonomic-foraging theory model, and we provide some foundations for that model here.

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Quantitative Fidelity of Brachiopod-Mollusk Assemblages from Modern Subtidal Environments of San Juan Islands, USA.

Michal Kowalewski, Monica Carroll, Lorraine Casazza, Neal S. Gupta, Bjarte Hannisdal, Austin Hendy, Richard A. Krause Jr., Michael LaBarbera, Dario G. Lazo, Carlo Messina, Stephaney Puchalski, Thomas A. Rothfus, Jenny Sälgeback, Jennifer Stempien, Rebecca C. Terry, Adam Tomašových.


[+info] VOLUME 1. ISSUE 1. APRIL 2003 (4 issue)

Whereas a majority of previous fidelity studies have dealt exclusively with mollusks, this study evaluates the compositional fidelity of mixed brachiopod-mollusk benthic assemblages sampled from the San Juan Islands area (Washington State, USA). A total of ca. 2500 live specimens and over 7500 shells and shell fragments were recovered from nine samples dredged along a subtidal transect. The shell material was dominated by fragments; less than 500 dead specimens were represented by complete valves or shells. The compositional fidelity was high: over 60% of live species and over 70% of live genera were also found in the death assemblage and over 60% of dead species and genera were represented in the life assemblage. These high numbers were consistent for all analyzed size fractions (2.3, 4, and 12mm). The life and death assemblages displayed a significant Spearman rank correlation (r = 0.41, p = 0.0001) suggesting that, despite the biasing action of taphonomic processes and time-averaging, the relative abundance of species in the original communities is at least partly preserved in the resulting death assemblages. The results also indicate that a restrictive analytical approach, with fragments excluded from the datasets, appears to provide more credible estimates of diversity and fidelity than an exhaustive approach, which included all fragments. Differences between the two analytical strategies most likely reflect the presence of several genera (e.g., Chlamys), which were readily identifiable from fragments (the five most abundant species in the exhaustive death assemblage were all identifiable from even small and heavily altered fragments). The “Chlamys effect” illustrates a general principle, because species often vary in their morphological distinctness, the inclusion of fragments is likely to notably distort the taxonomic composition of the studied death (or fossil) assemblages and may depress estimates of diversity and evenness. This study suggests that mixed brachiopod-mollusk associations are reasonably well preserved in the death assemblage in terms of taxonomic composition and rank abundance of dominant taxa. Moreover, despite considerable microstructural and compositional differences between brachiopod and mollusk shells, the class-level fidelity is excellent when fragments are excluded from the analysis. The results are highly congruent with patterns observed previously in fidelity studies focused exclusively on mollusks.

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The Taphonomist´s Corner | Hungry Lions.

Manuel Domínguez-Rodrigo.

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Volumen 2. Issue 1-4. Year 2004.

2020-03-27T20:44:52+02:00octubre 26th, 2019|Volumen 2. Issue 1-4. Year 2004.|

VOLUME 2. NUMBERS 1-4. 2004 [Special volume on Debating Issues of Equifinality in Ungulate Skeletal Part Studies. N. D. Munro & G. Bar-Oz (eds.)]

Debating Issues of Equifinality in Ungulate Skeletal Part Studies.

Natalie D. Munro, G. Bar-Oz.


[+info] VOLUME 2. ISSUE 1-4. 2004 (1 issue)

This paper introduces a collection of 11 papers originally presented in a symposium held at the 2004 meeting of the Society for American Archaeology. The papers debate and propose solutions for multiple aspects of equifinality in ungulate skeletal part studies and focus on four primary themes: (1) theoretical issues of equifinality; (2) methods for generating skeletal part frequencies; (3) the tools for analyzing skeletal part frequencies; and (4) attritional biases caused by natural and cultural taphonomic agents. Although debate continues over the methods used to quantify and analyze ungulate skeletal parts, most participants agree on the need for detailed publication of raw bone portion counts and bone portion coding and quantification methods.

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The Concept of Equifinality in Taphonomy.

R. Lee Lyman.


[+info] VOLUME 2. ISSUE 1-4. 2004 (2 issue)

The term "equifinality" was coined by Ludwig von Bertalanffy as he worked to develop general system theory. In 1949 he defined equifinality as reaching the "same final state from different initial states" in an open system, one capable of "exchanging materials with its environment." Taphonomists have typically defined equifinality as reaching the same final state from different initial conditions and in different ways, without consideration of whether a system was open or closed. Natural historical processes involving organic tissues comprise open systems. Whether two alternate taphonomic hypotheses can be distinguished or not can be construed as a problem of taphonomic equifinality, or it can be construed as a problem of statistical indistinguishability. For both, the epistemological problem reduces to one of classification. The production of much greater knowledge and understanding of the many reasons (cause-effect relations) why skeletal part frequencies vary has resulted from use of the equifinality concept because that concept demands innovative analyses of previously unimagined variables.

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Measuring Skeletal Part Representation in Archaeological Faunas.

Donald K. Grayson, Carol J. Frey.


[+info] VOLUME 2. ISSUE 1-4. 2004 (3 issue)

Most analyses of relative skeletal abundances in archaeological contexts are based on units derived, in one way or another, from the number of identified specimens (NISP): the minimum number of elements (MNE), the "minimal animal unit" (MAU), and the skeletal-element based minimum number of individuals (MNI). MNE values can be interpreted as if they were the results of a sampling exercise, telling us the chances that specimens drawn from a population of NISP values match in some specified way. Since this is the case, MNE values should scale to the NISPs for the body part involved. Since MAUs are generally calculated by standardizing MNE values by the number of times the part occurs in the skeleton, and MNIs by a combination of this and both age- and side-matching, there should be a very predictable relationship between the values of NISP, MNE, MAU, and MNI within any given assemblage. Using a series of assemblages from South Africa, Iran, and France, we show that this is, in fact, the case.

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Distinguishing Selective Transport and In Situ Attrition: A Critical Review of Analytical Approaches.

Naomi Cleghorn, Curtis W. Marean.


[+info] VOLUME 2. ISSUE 1-4. 2004 (4 issue)

Skeletal element frequencies are at once enticing sources of behavioral information and thorny taphonomic dilemmas. Many archaeofaunal assemblages combine some degree of selective transport and in situ attrition, both of which affect the relative representation of elements. In addition, some analytical methods may add their own signature, further complicating the analysis of the element profile (Marean et al., this volume). Three methods have been applied to the problem of distinguishing attrition from selective transport: the Anatomical Region Profile (ARP), the Analysis of Bone Counts by Maximum Likelihood (ABCML), and the high and low survival element set model. We find that the ARP technique fails to perform as suggested. The ABCML is an innovative and promising line of inquiry, but is currently limited by methodological and theoretical shortcomings. The high and low survival set model appears to be an effective approach to analysis, but the actualistic tests of its power are still limited. We conclude that sensitivity to the issue of differential intra-element survival is key to future research into this problem.

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Skeletal Element Equifinality in Zooarchaeology Begins with Method: The Evolution and Status of the «Shaft Critique».

Curtis W. Marean, Manuel Domínguez-Rodrigo, Travis Rayne Pickering.


[+info] VOLUME 2. ISSUE 1-4. 2004 (5 issue)

The most common pattern of skeletal part representation described for zooarchaeological assemblages is a head-dominated or head and foot-dominated sample (Type II assemblages). Although an important early study by C.K. Brain (1969) suggested strongly that such a pattern might be mediated by skeleton-wide variation in bone density, this conclusion was under-appreciated for nearly twenty years. Instead, a majority of researchers working on Type II assemblages that are widely separated by geography and archaeological time argued in each case that the pattern was a by-product of foraging strategies used by hominins. In response, a small group of researchers expanded on Brain's pioneering work, concluding that the Type II pattern is actually instead a methodological artifact caused by (1) a combination of taphonomic factors that selectively destroy bone portions based on relative density and (2) analytical procedures that subsequently selectively bias against those same bone portions. Here we discuss in detail specific methodological and data recording recommendations that should eliminate the identified analytical problems and assist zooarchaeologists in assessing the degree of bias in the published work of other researchers.

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The Fallibility of Bone Density Values and Their Use in Archaeological Analyses.

Y. M. Lam, O. M. Pearson.


[+info] VOLUME 2. ISSUE 1-4. 2004 (6 issue)

As a proxy measure of resistance to destructive processes, bone density has played a central role in the discussion of equifinality and faunal representation. Bone density data sets have been derived for a diverse range of species, providing zooarchaeologists with a framework for assessing the occurrence of density-mediated destructive processes. These data sets vary tremendously in accuracy. In addition, the representation of the density of a bone portion as a single number -while convenient for quantitative analyses- obscures by oversimplification the many factors that affect the derivation of density values, a complicated process subject to multiple potential sources of variation and error. Density data sets and methods of quantitative analysis must be chosen with care, and the reasons for these choices made explicit. At the same time, it must be recognized that, despite the amount of attention that it has received, density is only one of many variables that affect the ability of a bone to restrict destruction.

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A Comparison of Photon Densitometry and Computed Tomography Parameters of Bone Density in Ungulate Body Part Profiles.

Mary C. Stiner.


[+info] VOLUME 2. ISSUE 1-4. 2004 (7 issue)

Biases in ungulate body part representation in archaeofaunas potentially reflect human foraging decisions. However, the signatures of density-mediated attrition of body parts and human selectivity in response to nutritional content can overlap to a significant extent. Zooarchaeologists' techniques for analyzing skeletal representation for density-dependent biases must either address differential resistance among distinct skeletal macro-tissue classes, or compare skeletal representation within a narrower density range that is widely distributed in the skeleton. This presentation examines the potential comparability of bone density parameters obtained by photon densitometry (PD) and computed tomography (CT) within limb elements and across regions of the whole skeleton. "Unadjusted" parameters obtained by PD and CT techniques are in reasonably good agreement, and these parameters yield similar results when applied to patterns of skeletal representation in Mediterranean faunas generated by Paleolithic humans and Pleistocene spotted hyenas. More significant than the technique for measuring density in modern mammal skeletons is whether the density parameter values have been adjusted, arguably to compensate for problems of shape and the presence of large internal voids in limb bone tubes. The results of systematic comparison of density parameter variation among published sources, and their application to prehistoric cases accumulated by diverse agents, contradict the great preservation differential between spongy and compact bone specimens suggested by certain captive hyena experiments and the Mousterian fauna from Kobeh Cave (Iran). Only the adjustments made to the CT parameters for limb shafts (BMD2) accommodate the latter cases.

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Equifinality, Assemblage Integrity and Behavioral Inferences at Verberie.

James G. Enloe.


[+info] VOLUME 2. ISSUE 1-4. 2004 (8 issue)

Body part representation is often used to identify site function, particularly transport to or transport from kill sites. Taphonomic research has indicated that a number of pre- and post-depositional agencies can result in similar part representation, largely a function of bone density, which can be measured in a variety of ways. A number of procedures for measuring bone density are discussed and applied to a late Upper Paleolithic faunal assemblage from Verberie, France. Comparisons of those densities with percent survivorship of reindeer bones from the archaeological site indicate that density-mediated attrition, most commonly associated with equifinality, is not primarily responsible for the skeletal element representation. A reverse bulk utility curve suggests that high and medium nutritional value skeletal elements were removed from this hunting site for subsequent processing and consumption elsewhere.

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Applied Models and Indices vs. High-Resolution, Observed Data: Detailed Fracture and Fragmentation Analyses for the Investigation of Skeletal Part Abundance Patterns.

Alan K. Outram.


[+info] VOLUME 2. ISSUE 1-4. 2004 (9 issue)

The history and development of skeletal part abundance studies is briefly discussed. Two principal strands of this sub-discipline are the application of indices of food utility and bone mineral density to the interpretation of skeletal part abundance patterns. Both food utility and bone mineral density indices are derived from modern observations, underwritten by uniformitarian assumptions, and are used to model behavioural and taphonomic patterns in the selection and survival of bone elements. The application of such models is critiqued. It is argued that, whilst such models remain extremely valuable, they will always suffer from equifinality with regard to end interpretations. The solution to this problem does not lie in improving these models, or the data they derive from, though this may be desirable, but in the more time-consuming option of improving the resolution of archaeologically observed data. Several ways of doing this are briefly discussed. One of these options, fracture and fragmentation analysis, is outlined in detail. Sample applications of such an approach are presented and discussed. These include the use of fracture and fragmentation analysis to identify specific practices that can severely skew skeletal part abundances, such as bone grease rendering, and the identification of levels of pre-depositional and post-depositional fracturing within the taphonomic history of bone assemblages.

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The Derivation and Application of White-Tailed Deer Utility Indices and Return Rates.

T. Cregg Madrigal.


[+info] VOLUME 2. ISSUE 1-4. 2004 (10 issue)

Utility indices have long been used to interpret ungulate body part representation at archaeological sites. The use of return rates, which are a more appropriate measure for studies of foraging efficiency, have been used less frequently. Until recently, zooarchaeologists interested in the prehistoric use of white-tailed deer were forced to use utility indices developed from other species. In this paper, the derivation and application of utility indices and return rates for white-tailed deer are discussed and two recently derived white-tailed deer utility indices are compared.

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Beyond Cautionary Tales: A Multivariate Taphonomic Approach for Resolving Equifinality in Zooarchaeological Studies.

Guy Bar-Oz, Natalie D. Munro.


[+info] VOLUME 2. ISSUE 1-4. 2004 (11 issue)

We describe a multivariate approach that reconstructs the taphonomic histories of zooarchaeological assemblages. The approach applies a sequence of zooarchaeological analyses to bone assemblages to determine the most significant agents of assemblage formation. By examining the differential survivorship of bones from subgroups within an assemblage, problems of equifinality in skeletal part studies can be overcome. The multivariate approach follows three primary analytical stages including: a) a descriptive stage that summarizes the representation of key taphonomic variables of each assemblage; b) an analytical stage that investigates the completeness and fragmentation of skeletal parts; and c) a comparative stage that evaluates taphonomic variation amongst subgroups within a zooarchaeological assemblage. In a case study of six Epipaleolithic assemblages from the southern Levant, the multivariate approach reveals that intensive bone processing by humans for marrow and possibly grease was the primary determinant of gazelle bone survivorship, while small game taxa experienced independent taphonomic histories.

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Body Part Representation and Seasonality: Sheep/Goat, Bird and Fish Remains From Early Neolithic Ecsegfalva 23, SE Hungary.

Anne Pike-Tay , László Bartosiewicz, Erika Gál, Alasdair Whittle.


[+info] VOLUME 2. ISSUE 1-4. 2004 (12 issue)

Assessments of site seasonality have increasingly relied upon three methods: 1) the presence or absence of seasonally available fauna, the oldest, most widely-used approach; 2) the population structure method, which relies upon the seasonal variation in the age and sex composition of the animals exploited; and 3) techniques such as skeletochronology or dental growth-increment studies. With all three methods, issues of equifinality result from the variability in body part representation. Cultural actions such as differential transport, modes of butchery, storage and culinary practices, in addition, natural taphonomic agents, also result in uneven body part representation, which can lead to false seasonal patterns. The consonance between different seasonality data for caprines and fish suggest that spring to fall occupations must have played a serious role in shaping the Neolithic animal bone deposits from Ecsegfalva 23, Hungary. Tooth sectioning data on caprines add late winter to this time interval. Finally, the broad seasonal spectrum of avian remains is potentially indicative of a year-round occupation.

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