Deposition of annual growth lines in the apex of the common limpet (Patella vulgata) from Shetland Islands,UK and Norway: Evidence from field marking and shell mineral content of annual line deposition

The abundance, accessibility and value of limpets as a source of food and bait for coastal peoples have resulted in their high frequency in shell middens worldwide. The limpet Patella vulgata is found in middens from the Mediterranean to Norway, and morphometric and sclerochronological analyses of its shell can provide insight into harvesting patterns and paleoenvironmental variables valuable in reconstructing climate. Previous work with P. vulgata has relied on lines on the exterior of the shell, or on lines exiting on the shell surface in shell cross-section, as annual or sub-annual markers. Shell damage may compromise these lines and limit the use of some shells, but growth lines are also found in the better-preserved shell apex. We investigated whether the growth lines in the apex of P. vulgata from two locations in Northern Europe are annual using calcein-marking and recapture. Investigations were performed at one site in the Shetland Islands (UK) and at one site at the northern limit of P. vulgata's range in Northern Norway. We also used laser ablation to measure the concentration of minerals in the shells of two individuals from Shetland to determine if patterns of minerals suggested as bioproxies for temperature and productivity varied annually. All individuals deposited one growth line in the apex during their year in the field, and the lowest ratios of Sr/Ca and Ba/Ca and to a lesser extent Mg/Ca were coincident with annual lines on the shells from Shetland. Growth at both sites was modelled using the von Bertalanffy growth function, and apex growth was nearly five times faster in Shetland than in Norway, probably a result of differences in temperature between the two locations.     

Detailed protocol for an accurate non-destructive direct dating of tooth enamel fragment using Electron Spin Resonance

In the context of human evolution, fossil remains are too valuable to be destroyed and any alteration should be kept to a minimum. The newly developed protocol on fossil fragments has open the gate for ‘virtually’ non-destructive ESR (Electron Spin Resonance) direct dating of human remains. The method allows the separation of unstable and interfering signals that were responsible for large dose underestimation. While a complete investigation of the ESR signal remains a complex task and requires numerous hours of manipulations, a rapid dose assessment protocol can be achieve without compromising the accuracy nor the integrity of the sample. The new protocol should be used for future dating regardless of the possibility of measuring powder.     

Low regional diversity of late cave bears mitochondrial DNA at the time of Chauvet Aurignacian paintings

The Chauvet-Pont d'Arc and Deux-Ouvertures caves, located along the Ardèche River (France), contain abundant remains of the extinct cave bear (Ursus spelaeus). Because they also display a variety of Palaeolithic anthropogenic evidences, such as the earliest charcoal drawings recorded to date (Chauvet-Pont d'Arc), and delicate engravings (Deux-Ouvertures), they offer the opportunity of studying the interaction between animals and human beings during a key period for Pleistocene species extinctions. We characterized cave bear specimens from these two sites by radiocarbon dating, stable isotopes, and mitochondrial DNA analysis. In Chauvet-Pont d'Arc, we obtained radiocarbon ages that ranged between 29,000 and 37,300 years before present (BP). The Deux-Ouvertures cave bear specimens clustered to the bottom of this time frame, returning radiocarbon ages of 27,440–30,220 years BP. Cave bear nitrogen isotope values were all compatible with a vegetarian diet. Mitochondrial DNA analysis, carried out on a highly variable domain of the control region, evidenced only two cave bear haplotypes, including a new haplotype, and a common one which largely predominated. We detected both haplotypes in Chauvet-Pont d'Arc, but only recorded the predominant one in the Deux-Ouvertures Cave. Our data put forward the surprising observation that cave bears inhabited Ardèche over a short period of time, from about 37,000 to 27,400 years BP. They were notably present during the first (Aurignacian) phase of human intrusions in Chauvet-Pont d'Arc, 30,000–32,000 years BP. This points to the possible competition for cave sites, presumably on a seasonal scale considering the cave bear habit for hibernation. During this time period, the small number of haplotypes is at variance with the extensive genetic diversity reported elsewhere for much more ancient specimens.     

La mode du ping-pong en France en 1902: une autre façon de questionner les classiques transferts culturels dans le domaine du sport

This study offers to follow the path of a parlour game and allows to seize the cultural transfers of this physical practise and to measure the part of the ambient anglomania in its reconfiguration in France at the beginning of the twentieth century. The ping-pong become a fashion within the French high society in 1902. By joining the bourgeois codes, this parlour game contributes to the perpetuation of the uses of this select population far from the effort of English sport. This fashion seduces because it’s not only perpetuation of the social conventions of elites. It’s also built on the idea of emancipation which the impossible meets between men and women symbolise. Fashion is surprisingly fed with paradox.     

Reconsidering global mobility – distancing from mass cruise tourism in the aftermath of COVID-19

Abstract

The mass cruise tourism industry (MCTI) is inscribed in a neoliberal production of tourism space that promotes the economic, sociocultural and environmental marginalization of cruise destinations. With cruise tourism halted as a result of the COVID-19, but likely to resume in 2021, I question the relevance of this form of tourism and propose future development alternatives aligned with deglobalisation and degrowth of the industry. Power relations with destinations communities can be critiqued using the concepts of global mobility and local mobility to show that the former, imperative for the deployment of mass cruise tourism, is a weakness for the industry in a post-pandemic perspective of reduced mobility. Destinations must use the industry’s dependence on global mobility as leverage to transform the balance of power in their favor and promote local mobility. They must embrace radical solutions to take control of their territory to favor a transition from “Growth for development” to “Degrowth for liveability”. Host territories, relying on national and regional governance, should gradually ban or restrict the arrival of mega-cruise ships, implement policies that promote the development of a niche cruise tourism industry (NCTI) with small ships and develop a fleet controlled by local actors.