The Use of Intrinsic Markers for Studying the Migratory Movements of Bats

Mortality of migratory bat species at wind energy facilities is a well-documented phenomenon, and mitigation and management are partially constrained by the current limited knowledge of bat migratory movements. Analyses of biochemical signatures in bat tissues (“intrinsic markers”) can provide information about the migratory origins of individual bats. Many tissue samples for intrinsic marker analysis may be collected from living and dead bats, including carcasses collected at wind energy facilities. In this paper, we review the full suite of available intrinsic marker analysis techniques that may be used to study bat migration, with the goal of summarizing the current literature and highlighting knowledge gaps and opportunities. We discuss applications of the stable isotopes of hydrogen, oxygen, nitrogen, carbon, sulfur; radiogenic strontium isotopes; trace elements and contaminants; and the combination of these markers with each other and with other extrinsic markers. We further discuss the tissue types that may be analyzed for each and provide a synthesis of the generalized workflow required to link bats to origins using intrinsic markers. While stable hydrogen isotope techniques have clearly been the leading approach to infer migratory bat movement patterns across the landscape, here we emphasize a variety of lesser used intrinsic markers (i.e., strontium, trace elements, contaminants) that may address new study areas or answer novel research questions.

Linking migratory performance to breeding phenology and productivity in an Afro-Palearctic long-distance migrant

Understanding the relationship between migratory performance and fitness is crucial for predicting population dynamics of migratory species. In this study, we used geolocators to explore migration performance (speed and duration of migratory movements, migratory timings) and its association with breeding phenology and productivity in an Afro-Palearctic insectivore, the European bee-eater (Merops apiaster), breeding in Iberian Peninsula. Bee-eaters migrated at higher travel speeds and had shorter travel duration in spring compared to autumn. Individuals that departed earlier or spent fewer days in-flight arrived earlier to the breeding areas. Our results show overall positive, but year-specific, linkages between arrival and laying dates. In one year, laying was earlier and productivity was higher, remaining constant throughout the season, while in the subsequent year productivity was lower and, importantly, declined with laying date. These results suggest that arriving earlier can be advantageous for bee-eaters, as in years when breeding conditions are favourable, early and late breeders produce high and similar number of fledglings, but when conditions are unfavourable only early breeders experience high productivity levels.

Editorial

In introducing the inspiration behind and aims of the new Rivista Italiana di Filosofia Politica (Italian Journal of Political Philosophy), launched by the Italian Society for Political Philosophy, this editorial explores the relationship between politics and philosophy. As does all philosophy, political philosophy arises from the desire to understand what is new and to question existing reality. Political philosophy is thus political in a twofold sense: on the one hand, it is an act of freedom vis-à-vis existing power or knowledge, and, on the other, it is an attempt to establish social relations based on discursive reasoning, and on open participatory mechanisms for decision-making. This dual political attitude is ever more vital in the face of challenges to contemporary societies, such as climate change, migratory movements, dramatic inequalities, and the apparatus of surveillance. Eschewing a philosophy of distraction and non-engagement, political philosophy (and this Journal) endorses the idea of another, “more civic”, philosophy, one which is committed to the opening of new spaces of personal and collective freedom. This Journal intends to nurture the dialogue between Italian and international philosophical-political communities, showing the richness of Italian discussion, and highlighting some of the most authoritative international scholars.

Editorial

In introducing the project of the Rivista Italiana di Filosofia Politica (Italian Journal of Political Philosophy), launched by the Italian Society for Political Philosophy, this editorial explores the relationship between politics and philosophy. As with philosophy itself, political philosophy arises from the desire to understand what is new and to question existing reality. Political philosophy is thus political in a twofold sense: on the one hand, it is an act of freedom vis-à-vis existing power or knowledge, and, on the other, it is an attempt to establish social relations based on discursive rationality, and on open participatory mechanisms for decision-making. This dual political attitude is even more essential in the face of challenges to contemporary societies, such as climate change, migratory movements, dramatic inequalities, and the apparatus of surveillance. Avoiding the risk of a “philosophy of distraction or non-engagement”, political philosophy (and this Journal) endorses the idea of another, “more civic”, philosophy, one which is committed to the opening of new spaces of personal and collective freedom. This Journal intends to nurture the dialogue between Italian and international philosophical-political communities, showing the richness of Italian discussion, and highlighting some of the most authoritative international scholars.

Encounters and Engagement in the Civilizational Analysis of Japan

As a field of significant activity for historical sociologists in recent decades, civilizational analysis has produced extensive and incisive works examining Japan as a historical formation of Eurasia. However, the same cannot be said of Japan’s Pacific relationship with the United States, which is neglected in the major historical sociologies of Japanese modernity. This essay seeks to address that unnecessary oversight by putting that relationship into focus as an international dimension of the institution of both states. It would be tempting to elucidate the entanglement of the two as an encounter of civilizations, but the author instead casts it as intercivilizational engagement, that is a deeper set of connections generated by routine contacts and migratory movements, trade in commerce and culture, and selective appropriation of models of statehood. Delineating the lines of exchange in all four domains of connectivity between Japan and the US, the essay profiles the international and imperial extensions of both states. In altering the perspective on Japan’s relations with the world, the author outlines a larger potential historical sociology of intercivilizational engagement between two Pacific-edge civilizational constellations.

Solidarity in crisis? Community responses to refugees and forced migrants in the Greek islands

This article examines the question of solidarity in light of recent refugees’ and forced migrants’ arrivals on Greek island shores as the first point of entry to the European Union. It focuses on various community solidarity initiatives emerging in 2015 and how they unfolded over time, until replaced by hostility and indifference following the EU–Turkey deal in March 2016. To account for this transformation, the study, carried out between 2016 and 2018, involved ethnographic work, interviews with local populations, activists, teachers and community leaders, and participant observations primarily in Lesbos, as well as Chios, Leros, and Samos. This article also sheds light on how Greece’s severe economic crisis has compounded anti-migration politics and securitization in recent migratory movements. Drawing on Judith Butler’s ideas of embodied vulnerability and intersubjective relationality, the article theorizes how solidarity evolves when border struggles intersect with deservingness, belonging, and refugees’ and forced migrants’ precarity. It concludes by proposing a psychosocial embodied notion of solidarity as a political strategy to counteract the neoliberal predicament that threatens all life with extinction.

Autumn migration of Jack Snipe Lymnocryptes minimus in southern Sweden: results from ten years of crepuscular ringing

The autumn migration of Jack Snipe Lymnocryptes minimus was studied using mist-netting at night along a muddy shoreline at Lake Tåkern in southern central Sweden. During ten consecutive autumn seasons ranging from mid-September to mid-November a total of 107 birds were captured, particularly within the first two hours after dusk. The peak of migration occurred in the first ten days of October with the juvenile birds on average passing a few days earlier than the adult birds. We present information on movements and ringing recoveries and review the challenges of ageing the species. We propose that crepuscular mist-netting near wetlands offering important staging grounds may be a suitable method to monitor the migratory movements, and possibly the population dynamics, of this little-studied species.

Nunamiut, the Tundra Dwellers

This article investigates the various senses and derivations of the term nuna in the Inuit-Yupik languages in order to reveal its origin in referring to the Arctic tundra. These languages arguably derive from that of the ancestors of the earliest inhabitants of the North American tundra, other inhabitants of the circumpolar Arctic today having only moved up at later times. Likely etymological correspondences in Eurasian languages of the far north support the original meaning of the word, whose connotations can be contrasted with those of English land, by which it is usually translated. They include reference to the unique vegetation of the Arctic tundra and to settlement and migratory movements across it in the past. The word has survived through millennia as far apart as mountainous East Greenland and the Aleutian Islands chain, where it has been adapted (as Unangan tanaX) to the archipelagic setting. It is suggested that the term nunamiut, literally “tundra dwellers,” can suitably be applied to speakers of all these languages still today.