Maria Bas

Institut de Ciències del Mar (ICM-CSIC)

Early juvenile loggerhead turtles (Caretta caretta) rely on gelatinous zooplankton, whereas individuals larger than 40 cm curved carapace length are adapted to crush hard-shelled invertebrates. Nevertheless, fish were reported to be the staple food of loggerhead turtles in the western Mediterranean 30 years ago. Here, the temporal consistency of su...

Este análisis ha sido realizado a partir de los tickets de venta de las lonjas correspondientes al año 2021

This paper aims to assess changes in the patterns of marine fish consumption by hunter-fisher-gatherer populations in the context of environmental change. To accomplish this objective, we used two methodological approaches: first, stable isotope analysis in ancient and modern shells of limpets and mussels to explore changes in the isotopic baseline...

This study compares the δ15N values and the trophic position of two seabird species throughout the late Holocene in three regions in the southwestern Atlantic Ocean to assess the hypothesis that the decimation of megafauna led to changes in the trophic position of mesopredators. Modern and ancient mollusk shells were also analyzed to account for ch...

Mammal bones sustain rich chemoautotrophic microbial communities that are consumed by a range of marine invertebrates, with bacteria playing a fundamental role making the organic matter retained in the bones available to other organisms. Our major aim here is to characterize the phylogenetic diversity of bacteria associated with Mediterranean shall...

Fish skeletal remains recovered from two archaeological sites dated in the Middle Holocene of Tierra del Fuego (Argentina) were analysed to describe habitat use patterns by hake in the past and predict changes in a warmer world. Mitochondrial DNA was successfully extracted and amplified from 42 out of 45 first vertebra from ancient hake and phyloge...

Fish skeletal remains recovered from two archaeological sites dated in the Middle Holocene of Tierra del Fuego (Argentina) were analysed to describe habitat use patterns by hake in the past and predict changes in a warmer world. Mitochondrial DNA was successfully extracted and amplified from 42 out of 45 first vertebra from ancient hake and phyloge...

This article presents a state of the art of the research developed on the archaeological sites called concheros in America in the recent years in order to discuss its use as information files.For that purpose, the evidence obtained from these deposits was taken to analyze and contribute to the study of four issues: 1)Populations of America, 2) Pale...

Stable isotope ratios in patelloid limpets of the genus Patella have been established as proxies for coastal environmental change at sub-monthly resolution along the eastern North Atlantic and Mediterranean Sea. Nacella deaurata (Gmelin 1791) and N. magellanica (Gmelin 1791) are common intertidal species of patelloid limpets inhabiting the coast of...

Margen Sur archaeological site (Atlantic coast in the Fuegian steppe) is a shell midden buried in aeolian sediments that were intercepted by a multiple human burial. The archaeofaunal analysis presented here showed a high diversity of consumed species in this site. The study comprised 7.501 vertebrate bones and 636 mollusk shells (NR total = 8.137)...

Las investigaciones arqueológicas en el área norte de la Isla Grande de Tierra del Fuego han planteado que la subsistencia de los cazadores-recolectores que habitaron el sector de la costa atlántica durante el Holoceno se basó en la explotación de recursos terrestres y marinos. El objetivo de este trabajo es presentar la información contextual regi...

Stable carbon and nitrogen isotope ratios in the skeletal elements of both ancient and modern marine species from the Beagle Channel were used to compare the structure of Late Holocene and modern food webs, and predict potential changes as a result of a Sea Surface Temperature (SST) increase in the region. Complementary, ancient and modern shells o...

Palaeoclimatic records from southern tip of South America during the Last Holocene, indicate important climate intervals, such as the Medieval Climate Anomaly and Little Ice Age, which offered new scenarios to hunter-gatherer groups who inhabited the region. The aim of this paper is to explore the social practices carried out by hunter-fisher-gathe...

Se presentan los resultados del análisis de los recursos faunísticos de los sitios arqueológicos Okon XXI, Teis X y Teis XI (Holoceno tardío), situados en la costa atlántica fueguina (en las inmediaciones de la Estancia María Luisa). Desde el punto de vista del consumo de recursos faunísticos, los resultados muestran un aprovechamiento de amplio es...

Stable isotope ratios of C and N in the bone tissue of three different skeletal elements (angular, cleithrum and vertebra) of three fish species from different evolutionary lineages (Clupeiformes, Atheriniformes and Notothenioidei) were determined before (δ¹³Cbulk and δ¹⁵Nbulk) and after demineralization and delipidation (δ¹³Cdml and δ¹⁵Ndml). One...

Over the past several years, there has been growing interest in how bones of decaying mammals are colonized in the marine seabed. One of the most common opportunistic taxa occurring worldwide on bones is dorvilleid polychaetes of the genus Ophryotrocha. In a recent study in the Mediterranean, Ophryotrocha puerilis and Ophryotrocha alborana were two...

ABSTRACT. This work focuses on the spatial variability of the archaeological record at hunter-gatherer sites on the Atlantic coast of Tierra del Fuego, Argentina. The theoretical and methodological approach was developed using a quantitative toolset. The main goal is to evaluate occupation intensity based on three case studies and using three diffe...

Conference Presentation. IX Congreso Nacional de Arqueología Argentina (2016)

El proyecto “Poblamiento, Gestión de recursos y Uso del Espacio en la Costa Atlántica de Tierra del Fuego” (PICT 2148) tiene como eje central el estudio de las poblaciones humanas que habitaron la franja litoral atlántica de Tierra del Fuego, comprendida entre la desembocadura de los río El Vasco y el Leticia. En el marco de dicho proyecto se reali...

El sitio arqueológico Lanashuaia II se encuentra situado en la costa Norte de Canal Beagle. Este sitio arqueológico es un conchero de estructura anular con una superficie aproximada de 55 m2 y fue excavado en tres campañas arqueológicas entre los años 2009 y 2011. Este yacimiento se encuentra en un istmo, lugar muy ventajoso, ya que está rodeado po...

Osedax, commonly known as bone-eating worms, are unusual marine annelids belonging to Siboglinidae and represent a remarkable example of evolutionary adaptation to a specialized habitat, namely sunken vertebrate bones. Usually, females of these animals live anchored inside bone owing to a ramified root system from an ovisac, and obtain nutrition vi...

Invertebrate and microbial marine communities associated with mammal bones are interesting and poorly understood habitats, mainly known from studies on deep-water whale remains. In order to characterize these communities in the shallow-water Mediterranean, we present here the results of a pioneering experiment using mammal bones. Minke whale, pig a...

Contrastingly to other areas in the planet, very little is known about Antarctic marine invertebrates associated to eutrophic marine benthic areas. Recently, several studies investigated this fauna by experimentally deploying whale bones, leading to the discovery of new opportunistic polychaetes. To investigate the Antarctic organisms associated to...

El Instituto Español de Oceanografía (IEO) participa, con la Universidad de Barcelona (UB) y otros centros de investigación, en el proyecto ACTIQUIM, cuya finalidad principal es determinar la actividad ecológica de productos naturales marinos obtenidos de organismos antárticos mediante experimentos de ecología química realizados in situ.

Marine benthic invertebrate communities associated to mammal bones have lately captured a great deal of scientific attention. Although the total contribution of these bones to the oceans is relatively low, the occurrence of these substrates in the benthos represents a long lasting microhabitat in both space and time; a kind of island extremely rich...