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  • 1
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    Chapter 4 The social value of anonymity on campus (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-03-23
    Beschreibung: "This paper considers the social value of anonymity in online university student communities, through the presentation of research which tracked the final year of life of the social media application Yik Yak. Yik Yak was an anonymous, geosocial mobile application launched in 2013 which, at its peak in 2014, was used by around two million students in the US and UK. The research we report here is significant as a mixed method study tracing the final year of the life of this app in a large UK university between 2016 and 2017. The paper uses computational and ethnographic methods to understand what might be at stake in the loss of anonymity within university student communities in a datafied society. Countering the most common argument made against online anonymity – its association with hate speech and victimisation – the paper draws on recent conceptual work on the social value of anonymity to argue that anonymity online in this context had significant value for the communities that use it. This study of a now-lost social network constitutes a valuable portrait by which we might better understand our current predicament in relation to anonymity, its perceived value and its growing impossibility."
    Schlagwort(e): Anonymity ; ephemerality ; social media ; Yik Yak ; community ; campus ; datafication ; thema EDItEUR::J Society and Social Sciences::JN Education
    Sprache: Englisch
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    Chapter 8 Unintended Consequences of EU Democracy Support in the European Neighbourhood (2019)
    Taylor & Francis | Unintended Consequences of EU External Action | Routledge
    Details
    Publikationsdatum: 2023-09-12
    Beschreibung: "The European Union’s (EU) impact on the political governance of the European neighbourhood is varied and sometimes opposite to the declared objectives of its democracy support policies. The democracy promotion literature has to a large extent neglected the unintended consequences of EU democracy support in Eastern Europe and the Middle East and North Africa. The EU has left multiple imprints on the political trajectories of the countries in the neighbourhood and yet the dominant explanation, highlighting the EU’s security and economic interests in the two regions, cannot fully account for the unintended consequences of its policies. The literature on the ‘pathologies’ of international organisations offers an explanation, emphasizing the failures of the EU bureaucracy to anticipate, prevent or reverse the undesired effects of its democracy support in the neighbourhood."
    Schlagwort(e): Democracy promotion ; ENP ; unintended consequence ; bureaucracy ; Eastern Europe ; MENA ; bic Book Industry Communication::J Society & social sciences::JP Politics & government
    Sprache: Englisch
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  • 3
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    Catholic Missionaries in Early Modern Asia (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-04-07
    Beschreibung: Over recent decades, historians have become increasingly interested in early modern Catholic missions in Asia as laboratories of cultural contact. This book builds on recent ground-breaking research on early modern Catholic missions, which has shown that missionaries in Asia cooperated with and accommodated the needs of local agents rather than being uncompromising promoters of post-Tridentine doctrine and devotion.　 Bringing together some of the most renowned and innovative researchers from Anglophone countries and continental Europe, this volume investigates how missionaries’ entanglements with local societies across Asia contributed to processes of localization within the early modern Catholic church. The focus of the volume is on missionaries’ adaptation to four ideal-typical social settings that played an eminent role in early modern Asian missions: (1) the symbolically loaded princely court; (2) the city as a space of especially dense communication; (3) the countryside, where missionary presence was only rarely permanent; (4) and the household – a central arena of conversion in early modern Asian societies. Shining a fresh light onto the history of early modern Catholic missions and the early modern Eurasian cultural exchange, this will be an important book for any scholar of religious history, history of cultural contact/global history and early modern history in Asia.
    Schlagwort(e): history ; religion ; christianity ; Asia ; thema EDItEUR::N History and Archaeology::NH History ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRM Christianity
    Sprache: Englisch
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  • 4
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    Faith-Based Organizations in Development Discourses and Practice (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-04-07
    Beschreibung: "Exploring faith-based organizations (FBOs) in current developmental discourses and practice, this book presents a selection of empirical in-depth case-studies of Christian FBOs and assesses the vital role credited to FBOs in current discourses on development. Examining the engagement of FBOs with contemporary politics of development, the contributions stress the agency of FBOs in diverse contexts of development policy, both local and global. It is emphasised that FBOs constitute boundary agents and developmental entrepreneurs: they move between different discursive fields such as national and international development discourses, theological discourses, and their specific religious constituencies. By combining influxes from these different contexts, FBOs generate unique perspectives on development: they express alternative views on development and stress particular approaches anchored in their theological social ethics. This book should be of interest to those researching FBOs and their interaction with international organizations, and to scholars working in the broader areas of religion and politics and politics and development."
    Schlagwort(e): Development policy ; Faith-based organizations ; global development ; RNGOs ; religion ; politics ; thema EDItEUR::J Society and Social Sciences::JP Politics and government ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPS International relations::JPSN International institutions ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPW Political activism / Political engagement::JPWH Non-governmental organizations (NGOs)
    Sprache: Englisch
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  • 5
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    The Datafication of Education (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-04-07
    Beschreibung: "This paper considers the social value of anonymity in online university student communities, through the presentation of research which tracked the final year of life of the social media application Yik Yak. Yik Yak was an anonymous, geosocial mobile application launched in 2013 which, at its peak in 2014, was used by around two million students in the US and UK. The research we report here is significant as a mixed method study tracing the final year of the life of this app in a large UK university between 2016 and 2017. The paper uses computational and ethnographic methods to understand what might be at stake in the loss of anonymity within university student communities in a datafied society. Countering the most common argument made against online anonymity – its association with hate speech and victimisation – the paper draws on recent conceptual work on the social value of anonymity to argue that anonymity online in this context had significant value for the communities that use it. This study of a now-lost social network constitutes a valuable portrait by which we might better understand our current predicament in relation to anonymity, its perceived value and its growing impossibility."
    Schlagwort(e): Education ; datafication ; thema EDItEUR::J Society and Social Sciences::JN Education
    Sprache: Englisch
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  • 6
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    Locating Zika (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-03-29
    Beschreibung: The emergence of Zika virus challenged conventional ideas of mosquito-borne diseases, tested the resilience of health systems and embedded itself within local sociocultural worlds, with major implications for environmental, sexual, reproductive and paediatric health. This book explores this complex viral epidemic and situates it within its broader social, epidemiological and historical context in Latin America and the Caribbean. The chapters include a diverse set of case studies from scholars and health practitioners working across the region, from Brazil, Venezuela, Ecuador, Mexico, Colombia, the United States and Haiti. The book explores how mosquito-borne disease epidemics (not only Zika but also chikungunya, dengue and malaria) intersect with social change and health governance. By doing so, the authors reflect on the ways in which situated knowledge and social science approaches can contribute to more effective health.
    Schlagwort(e): Zika virus ; infection ; epidemiology ; Latin America ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHM Anthropology ; thema EDItEUR::J Society and Social Sciences::JH Sociology and anthropology::JHM Anthropology
    Sprache: Englisch
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  • 7
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    Chapter 1 Unintended Consequences of EU External Action (2019)
    Taylor & Francis | Unintended Consequences of EU External Action | Routledge
    Details
    Publikationsdatum: 2024-03-29
    Beschreibung: "There is a gap in IR and EU scholarship concerning unintended consequences in an international context, leaving this important phenomenon understudied. To fill this gap, a conceptualisation of unintended consequences is offered, and a set of common research questions are presented, highlighting the nature (what), the causes (why) and the modes of management (how) of unintended consequences of EU external action. The Special Issue contributes to the study of the EU as an international actor by broadening the notion of the EU’s impact abroad to include the unintended consequences of EU (in)actions and by shedding new light on the conceptual paradigms that explain EU external action."
    Schlagwort(e): Unintended consequences ; international relations ; EU external action ; foreign policy ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
    Sprache: Englisch
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  • 8
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    Chapter 4 Business interests and the development of the public-private welfare mix in Switzerland, 1880-1990 (2019)
    Taylor & Francis | Business Interests and the Development of the Modern Welfare State | Routledge
    Details
    Publikationsdatum: 2024-03-29
    Beschreibung: This edited volume provides a synthesis on the question of business attitudes towards and its influence over the development of the modern welfare state. It gathers leading scholars in the field to offer both in-depth historical country case studies and comparative chapters that discuss contemporary developments. Composed of six archive-based historical narratives of business’ role in the development of social insurance programs in Germany, Finland, the Netherlands, Switzerland, the United Kingdom and the United States, and six comparative case studies, this volume also extends the study of business to policy fields that have hitherto received little attention in the literature, such as active labor market policies, educational policies, employment protection legislation, healthcare, private pension programs and work‐family policies. It illuminates why business groups have responded so very differently to demands for increased social protection against different labor market risks in different countries and over time. This text will be of key interest to students and scholars of comparative welfare, political science, sociology, social policy studies, comparative political economy and welfare history.
    Schlagwort(e): Business ; Development ; Interests ; Modern ; State ; Welfare ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
    Sprache: Englisch
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  • 9
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    Vigilantism against Migrants and Minorities (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2023-09-12
    Beschreibung: This edited volume traces the rise of far right vigilante movements – some who have been involved in serious violence against minorities, migrants and other vulnerable groups in society, whereas other vigilantes are intimidating but avoid using violence. Written by an international team of contributors, the book features case studies from Western Europe, Eastern Europe, North America, and Asia. Each chapter is written to a common research template examining the national social and political context, the purpose of the vigilante group, how it is organised and operates, its communications and social media strategy and its relationship to mainstream social actors and institutions, and to similar groups in other countries. The final comparative chapter explores some of the broader research issues such as under which conditions such vigiliantism emerges, flourishes or fails, policing approaches, masculinity, the role of social media, responses from the state and civil society, and the evidence of transnational co-operation or inspiration. This is a groundbreaking volume which will be of particular interest to scholars with an interest in the extreme right, social movements, political violence, policing and criminology.
    Schlagwort(e): BNP ; Culture ; EDL ; Far Right ; Holocaust ; National Front ; Neo-Nazi ; Youth ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general
    Sprache: Englisch
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    Martial Arts and Well-Being (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-04-07
    Beschreibung: Arts; being; Carol; communities; Connecting; Fuller; Health; Llyod; Martial; promoting; Viki; well
    Schlagwort(e): Arts ; being ; Carol ; communities ; Connecting ; Fuller ; Health ; Llyod ; Martial ; promoting ; Viki ; well ; thema EDItEUR::J Society and Social Sciences::JM Psychology ; thema EDItEUR::J Society and Social Sciences::JM Psychology::JMH Social, group or collective psychology ; thema EDItEUR::S Sports and Active outdoor recreation::SC Sport: general::SCG Sports training and coaching::SCGP Sports psychology ; thema EDItEUR::S Sports and Active outdoor recreation::SR Combat sports and self-defence
    Sprache: Englisch
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    Chapter 3 Horizontal and Vertical Diversity (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-04-11
    Beschreibung: "Unintended consequences arising from EU external migration policy are a result of the multi-actor nature of this policy and of policy interactions. In addition, scholars face serious methodological challenges in establishing what the EU’s ‘intent’ is in external migration policy and, therefore, in determining which consequences are intended and which are unintended. The literature on the implementation and evaluation of EU external migration policy is in its infancy, and future work should take into account all policy outcomes – both those that were intended and those that were not."
    Schlagwort(e): EU migration policy ; unintended consequences ; policy interactions ; multilevel governance ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
    Sprache: Englisch
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  • 12
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    Tourism and Travel during the Cold War (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-04-01
    Beschreibung: The Iron Curtain was not an impenetrable divide, and contacts between East and West took place regularly and on various levels throughout the Cold War. This book explores how the European tourist industry transcended the ideological fault lines and the communist states attracted an ever-increasing number of Western tourists. Based on extensive original research, it examines the ramifications of tourism, from sun-and-sea package tours to human rights travels, in key Eastern European locations including East Berlin, the Soviet Union, Yugoslavia, and Albania. The book’s analysis of the politics, culture, and history of tourism to the East offers important new perspectives on European tourism in the twentieth century.
    Schlagwort(e): tourism ; travel ; cold war ; experiences ; tourists ; iron curtain ; thema EDItEUR::N History and Archaeology::NH History ; thema EDItEUR::J Society and Social Sciences ; thema EDItEUR::N History and Archaeology::NH History ; thema EDItEUR::J Society and Social Sciences
    Sprache: Englisch
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    Chapter 11 European Capitals of Culture y (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-04-06
    Beschreibung: ‘What is Europe? It’s not just a series of banknotes’, an interviewee remarked when asked about European heritage. Our study of European Capitals of Culture (ECoC), one of the main European heritage programmes, proceeds in the same spirit, informed by the complex and disputed discussions of what Europe is (see, for example, Sassatelli 2002 ) and how, within such shifting grounds, European heritage might be interpreted (see, for instance, Delanty 2017 ; Niklasson 2017). Described by some as large- scale bottom- up cultural programming (Immler and Sakkers 2014 ), the ECoC programme has seen several cities across Europe compete for the title of European Capital of Culture for more than three decades now. Our research has focussed on three cities, Valletta as ECoC 2018 , Plovdiv as ECoC 2019 and Galway as ECoC 2020. We are conducting a discourse analysis of the submitted bids as the key documents related to each city’s participation in the programme; we are then investigating four common themes that emerge from this analysis: Europe, heritage, diversity and future.
    Schlagwort(e): Europe ; capitals ; culture ; thema EDItEUR::J Society and Social Sciences::JB Society and culture: general::JBC Cultural and media studies::JBCC Cultural studies
    Sprache: Englisch
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  • 14
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    Chapter 9 EU External Action, Intention and Explanation (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-03-23
    Beschreibung: "“Unintended consequences” is an umbrella concept. It comprises phenomena that differ in crucial respects and consequently, without refinement, it remains a rather blunt instrument for policy analysis. The contributions in this volume, however, show that disentangling unintended consequences by making clear distinctions between various types, makes the concept much more useful for policy analysis. Assessing the impact of EU foreign policies as studied in this volume, we show that “bonuses”, “windfalls”, “accidents”, and “trade-offs” – all unintended – are very different when it comes to the explanation of policy outcomes, or to allocating responsibility for them."
    Schlagwort(e): EU External Action ; foreign policy ; unintended consequences ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
    Sprache: Englisch
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  • 15
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    Routledge Handbook of State Recognition (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-03-29
    Beschreibung: This new handbook provides a comprehensive and multidisciplinary overview of the theoretical and empirical aspects of state recognition in international politics. Although the recognition of states plays a central role in shaping global politics, it remains an under-researched and widely dispersed subject. Coherently and innovatively structured, the handbook brings together a group of international scholars who examine the most important theoretical and comparative perspectives on state recognition, including debates about pathways to secession and self-determination, the broad range of actors and strategies that shape the recognition of states and a significant number of contemporary case studies. The handbook is organised into four key sections: Theoretical and normative perspectives Pathways to independent statehood Actors, forms and the process of state recognition Case studies of contemporary state recognition This handbook will be of great interest to students of foreign policy, international relations, international law, comparative politics and area studies. Chapter 19 of this book is freely available as a downloadable Open Access PDF under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license www.routledge.com/9780815354871
    Schlagwort(e): handbook ; state ; recognition ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
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  • 16
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    Hearing Voices, Demonic and Divine (2019)
    Taylor & Francis
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    Publikationsdatum: 2024-04-08
    Beschreibung: The Open Access version of this book, available at www.taylorfrancis.com/books/9781472453983, has been made available under a Creative Commons Attribution-Non Commercial-No Derivative 4.0 license. Experiences of hearing the voice of God (or angels, demons, or other spiritual beings) have generally been understood either as religious experiences or else as a feature of mental illness. Some critics of traditional religious faith have dismissed the visions and voices attributed to biblical characters and saints as evidence of mental disorder. However, it is now known that many ordinary people, with no other evidence of mental disorder, also hear voices and that these voices not infrequently include spiritual or religious content. Psychological and interdisciplinary research has shed a revealing light on these experiences in recent years, so that we now know much more about the phenomenon of "hearing voices" than ever before. The present work considers biblical, historical, and scientific accounts of spiritual and mystical experiences of voice hearing in the Christian tradition in order to explore how some voices may be understood theologically as revelatory. It is proposed that in the incarnation, Christian faith finds both an understanding of what it is to be fully human (a theological anthropology), and God’s perfect self-disclosure (revelation). Within such an understanding, revelatory voices represent a key point of interpersonal encounter between human beings and God.
    Schlagwort(e): gods ; avhs ; visionary ; experience ; hebrew ; scripture ; temporal ; lobe ; epilepsy ; religious ; bic Book Industry Communication::H Humanities::HR Religion & beliefs ; bic Book Industry Communication::H Humanities::HR Religion & beliefs::HRA Religion: general ; bic Book Industry Communication::H Humanities::HR Religion & beliefs::HRA Religion: general::HRAM Religious issues & debates::HRAM3 Religion & science ; bic Book Industry Communication::H Humanities::HR Religion & beliefs::HRC Christianity ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRA Religion: general ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRA Religion: general::QRAM Religious issues and debates::QRAM3 Religion and science ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRM Christianity
    Sprache: Englisch
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    Chapter 1 Heritages, identities and Europe (2019)
    Taylor & Francis | Heritage and Festivals in Europe | Routledge
    Details
    Publikationsdatum: 2024-04-01
    Beschreibung: Traditional arts practices and festivals have attracted increasing and diverse attention in the European context since policymakers discovered ‘culture’ as a resource in the 1980s (see, e.g., Kilday 1998 ). Their impact on their respective communities of practice, modes of production and exchange value in contemporary European society is under the spotlight from various angles within the newly emerged fi eld of ‘festival studies’, which is deeply connected to policy issues (Frost 2016 ). However, much of this interest is instrumentally concerned with revenue potential, leaving key concepts, such as heritage, identity and indeed Europe, defi ned in rather vague and often contradictory terms (Kockel, Nic Craith and Frykman 2012 ; Logan, Kockel and Nic Craith 2015 ; K ø lvraa 2016 ; L ä hdesm ä ki 2016 ; Whitehead and Bozo ğ lu 2017 ). Moreover, the number and range of events labelled as ‘festival’ is growing (Frost 2016 : 569), requiring a broader perspective on performances of heritage and identity.
    Schlagwort(e): Heritages ; identities ; Europe ; thema EDItEUR::N History and Archaeology::NH History
    Sprache: Englisch
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  • 18
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    Chapter 4 Ethics and access when consent must come first (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-03-29
    Beschreibung: Formalised procedures to obtain and document informed consent from research participants are at the heart of the shift from informal to formalised research ethics. Critiques claim that the requirements to obtain consent from all potential participants before the onset of a study will make it impossible to do ethnographic research and participant observation in institutional settings such as schools. Drawing on experiences from an ethnographic research project in secondary schools in Norway, the aim of this chapter is to discuss the ethical considerations and, embedded in these, the methodological and analytical challenges involved in doing participant observation in schools where not all pupils and parents have consented to participation in the research. The chapter suggests possible ways forward for tackling these challenges for ethnographic researchers working in schools.
    Schlagwort(e): Academic freedom ; education ; educational ethnography ; ethics ; ethics committees ; ethics regulation ; research methods ; situational ethics ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education
    Sprache: Englisch
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  • 19
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    Chapter 10 Performing Scots- European heritage, ‘For A’ That!’ (2019)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-04-07
    Beschreibung: This chapter focuses on the Scots- speaking community and, in particular, on its use of the Scots language as a means to assert political diff erence in the form of a ‘welcoming, inclusive civic nationalism’ (McFadyen 2018 ).
    Schlagwort(e): Scots language ; community ; heritage ; thema EDItEUR::C Language and Linguistics ; thema EDItEUR::N History and Archaeology::NH History
    Sprache: Englisch
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    Unintended Consequences of EU External Action (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-03-29
    Beschreibung: This book offers a conceptualisation of unintended consequences and addresses a set of common research questions, highlighting the nature (what), the causes (why), and the modes of management (how) of unintended consequences of the European Union’s (EU) external action. The chapters in the book engage with conceptual and empirical dimensions of the topic, as well as scholarly and policy implications thereof. They do so by looking at EU external action across various policy domains (including trade, migration, development, state-building, democracy promotion, and rule of law reform) and geographic areas (including the USA, Russia, the Western Balkans, the southern and eastern European neighbourhood, and Africa). The book contributes to the study of the EU as an international actor by broadening the notion of its impact abroad to include the unintended consequences of its (in)actions and by shedding new light on the conceptual paradigms that explain EU external action. This book fills the gap in IR and EU scholarship concerning unintended consequences in an international context and will be of interest to anyone studying this important phenomenon. It was originally published as a special issue of The International Spectator (Italian Journal of International Affairs). Chapters 1, 3, 7, 8 and 9 are available Open Access at https://www.routledge.com/products/9780367346492.
    Schlagwort(e): European Union ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
    Sprache: Englisch
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    It All Depends on the Dose (2018)
    Taylor & Francis | Routledge
    Details
    Publikationsdatum: 2024-01-30
    Beschreibung: This is the first volume to take a broad historical sweep of the close relation between medicines and poisons in the Western tradition, and their interconnectedness. They are like two ends of a spectrum, for the same natural material can be medicine or poison, depending on the dose, and poisons can be transformed into medicines, while medicines can turn out to be poisons. The book looks at important moments in the history of the relationship between poisons and medicines in European history, from Roman times, with the Greek physician Galen, through the Renaissance and the maverick physician Paracelsus, to the present, when poisons are actively being turned into beneficial medicines.
    Schlagwort(e): Medicines ; poisons ; History ; bic Book Industry Communication::H Humanities::HB History ; bic Book Industry Communication::M Medicine
    Sprache: Englisch
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    Chapter 7 Unintended Consequences of State-building Projects in Contested States (2019)
    Taylor & Francis | Unintended Consequences of EU External Action | Routledge
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    Publikationsdatum: 2024-03-29
    Beschreibung: The existing literature on state-building has focused mainly on post-conflict cases and ‘conventional’ examples of statehood, without taking into consideration the particularities of states that remain internally and/or externally contested. The EU’s engagement in Palestinian state-building through the deployment of EUPOL COPPS and EUBAM Rafah has generated various types of unintended consequences: anticipated and unanticipated, positive and negative, desirable and undesirable, some of which fulfill and some of which frustrate the initial intention. These have important reverberations for the EU’s conflict resolution strategies in Israel and Palestine, the most important being the strengthening of power imbalances and the enforcement of the status quo.
    Schlagwort(e): State-building ; contested statehood ; unintended consequences ; EUPOL COPPS ; EUBAM Rafah ; EU, Palestine ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
    Sprache: Englisch
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    Women’s Writing from Wales before 1914 (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-03-24
    Beschreibung: This essay collection rediscovers and reassesses a host of still little-known, pre-1914, Welsh women writers. In the last few decades considerable advances have been made towards rediscovering, contextualising, and analysing women’s writing from Wales. The combined influences of the post-1960s women’s movement, the 1990s Welsh devolution successes, and the development of the ‘Four Nations’ school of British literary criticism, have together effected significant advances in the field of Welsh feminist literary studies. This book focuses in particular on: the fifteenth- to eighteenth-century Welsh-language bards, such as Gwerful Mechain, Angharad James, and Marged Dafydd; the seventeenth- and eighteenth-century English-language poets, including Katherine Philips, Jane Brereton, Anne Penny, and Anne Hughes; contributors to the Romantic movement in Wales, such as the poets and novelists Mary Robinson and Ann of Swansea; the mid-nineteenth-century protesting voice of polemicists such as Jane Williams (Ysgafell); the Victorian English-language novelists, for example Louisa Matilda Spooner, Anne Beale, Amy Dillwyn, Allen Raine, and Mallt Williams, and their concern with national, class, and gender identities; and early twentieth-century Welsh-language writers engaged with Welsh Home Rule and women’s suffrage issues, such as Gwyneth Vaughan and Eluned Morgan.
    Schlagwort(e): Writing ; women ; Wales ; thema EDItEUR::D Biography, Literature and Literary studies ; thema EDItEUR::D Biography, Literature and Literary studies
    Sprache: Englisch
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    Chapter 13 Doing Versus Assessing Interactional Competence (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-03-24
    Beschreibung: This volume features the latest research findings on L2 interactional competence to demonstrate the potential for developing and implementing research-based pedagogy that targets interactional competence (IC) in early instruction in a variety of L2 learning and teaching contexts. Incorporating contributions from both leading and emerging researchers in the area, the book is organized into four sections to provide a systematic account of interactional competence, defined as a set of skills required to　co-construct an effective interaction with a variety of interlocutors in a variety of settings, and advocates for IC to be part of a well-rounded curriculum of L2 instruction. The volume provides a comprehensive overview of the different theoretical perspectives on IC within Conversation Analysis, and moves into a discussion of conversation-analytic research findings from a variety of contexts and of their pedagogical implications.The book then presents examples of pedagogy in practice and also illustrates the potential for implementing IC in testing settings. This volume makes a valuable contribution to the growing literature on interactional competence and will be of particular interest to graduate students and researchers in applied linguistics, SLA, language education, curriculum and instruction studies, and educational linguistics.
    Schlagwort(e): L2 learning ; second language learning ; conversation analysis ; interactional competence ; language education ; thema EDItEUR::C Language and Linguistics::CF Linguistics
    Sprache: Englisch
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    Chapter 19 Engagement without Recognition (2019)
    Taylor & Francis | Routledge Handbook of State Recognition | Routledge
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    Publikationsdatum: 2024-03-29
    Beschreibung: state; recognition
    Schlagwort(e): state ; recognition ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; thema EDItEUR::J Society and Social Sciences::JP Politics and government
    Sprache: Englisch
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    Chapter 2 On the relationship between performance and intangible cultural heritage (2019)
    Taylor & Francis | Heritage and Festivals in Europe | Routledge
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    Publikationsdatum: 2024-04-01
    Beschreibung: This chapter deliberately ranges across disciplines because we wish to move towards a better understanding of the notion of performance in relation to ICH, where both terms are inherently transdisciplinary. We fi rst examine the concept of performance as it is understood in Theatre and Performance Studies, focussing on those aspects which are pertinent to ICH – embodiment, liminality and effi cacy. Second, we turn to Heritage Studies and outline how ideas of and about performance shape our understanding of heritage and its sociocultural dimensions. Thirdly, and fi nally, we investigate aspects of the tension between the performance of and the research on ICH through the lens of ethnomusicology, a discipline that is shaped by the tensions between the wealth of tacit cultural knowledge acquired by learning to perform works of ICH and the need to communicate such knowledge in research outputs.
    Schlagwort(e): performance ; cultural heritage ; thema EDItEUR::N History and Archaeology::NH History
    Sprache: Englisch
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    Heritage and Festivals in Europe (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-04-01
    Beschreibung: Heritage and Festivals in Europe critically investigates the purpose, reach and effects of heritage festivals. Providing a comprehensive and detailed analysis of comparatively selected aspects of intangible cultural heritage, the volume demonstrates how such heritage is mobilised within events that have specific agency, particularly in the production and consumption of intrinsic and instrumental benefits for tourists, local communities and performers. Bringing together experts from a wide range of disciplines, the volume presents case studies from across Europe that consider many different varieties of heritage festivals. Focusing primarily on the popular and institutional practices of heritage making, the book addresses the gap between discourses of heritage at an official level and cultural practice at the local and regional level. Contributors to the volume also study the different factors influencing the sustainable development of tradition as part of intangible cultural heritage at the micro- and meso-levels, and examine underlying structures that are common across different countries. Heritage and Festivals in Europe takes a multidisciplinary approach and as such, should be of interest to scholars and students in the fields of heritage studies, tourism, performing arts, cultural studies and identity studies. Policymakers and practitioners throughout Europe should also find much to interest them within the pages of this volume.
    Schlagwort(e): heritage ; festivals ; Europe ; thema EDItEUR::N History and Archaeology::NH History
    Sprache: Englisch
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    Chapter 13 Commemorating vanished ‘homelands’ (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-05-09
    Beschreibung: The twentieth century has been described (e.g., Piskorski 2015 ) as a century of displacement. While globally the comparative scale of involuntary population movement may not have diff ered signifi cantly from earlier centuries, its perception has changed radically, leading in the early twenty- fi rst century to the dramatic resurgence of xenophobic populism across Europe and beyond (see Kaya 2017 ; De Cesari and Kaya 2019). Throughout the ‘refugee crisis’ of the 2010s, the German government’s moderate policy towards new migrants was widely criticised. The ideological foundation for that policy was, arguably, the country’s experience of integrating millions of ethnic German expellees and refugees from Central and Eastern Europe in the aftermath of the Second World War.
    Schlagwort(e): Germans ; Europe ; homelands ; heritage ; thema EDItEUR::N History and Archaeology::NH History
    Sprache: Englisch
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    Sustainable Food System Assessment (2019)
    Taylor & Francis | Routledge
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    Publikationsdatum: 2024-05-09
    Beschreibung: food supply; environmental aspects; sustainable agriculture; nutrition policy
    Schlagwort(e): food supply ; environmental aspects ; sustainable agriculture ; nutrition policy ; thema EDItEUR::J Society and Social Sciences::JP Politics and government ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning
    Sprache: Englisch
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    Key impacts of climate engineering on biodiversity and ecosystems, with priorities for future research (2016)
    Taylor & Francis
    In:  Journal of Integrative Environmental Sciences, 13 (2-4). pp. 103-128.
    Details
    Publikationsdatum: 2021-04-23
    Beschreibung: Climate change has significant implications for biodiversity and ecosystems. With slow progress towards reducing greenhouse gas emissions, climate engineering (or ‘geoengineering’) is receiving increasing attention for its potential to limit anthropogenic climate change and its damaging effects. Proposed techniques, such as ocean fertilization for carbon dioxide removal or stratospheric sulfate injections to reduce incoming solar radiation, would significantly alter atmospheric, terrestrial and marine environments, yet potential side-effects of their implementation for ecosystems and biodiversity have received little attention. A literature review was carried out to identify details of the potential ecological effects of climate engineering techniques. A group of biodiversity and environmental change researchers then employed a modified Delphi expert consultation technique to evaluate this evidence and prioritize the effects based on the relative importance of, and scientific understanding about, their biodiversity and ecosystem consequences. The key issues and knowledge gaps are used to shape a discussion of the biodiversity and ecosystem implications of climate engineering, including novel climatic conditions, alterations to marine systems and substantial terrestrial habitat change. This review highlights several current research priorities in which the climate engineering context is crucial to consider, as well as identifying some novel topics for ecological investigation.
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    A solid phase extraction based non-disruptive sampling technique to investigate the surface chemistry of macroalgae (2016)
    Taylor & Francis
    In:  Biofouling, 32 (2). pp. 145-153.
    Details
    Publikationsdatum: 2019-02-01
    Beschreibung: The surface chemistry of aquatic organisms determines their biotic interactions. Metabolites in the spatially limited laminar boundary layer mediate processes, such as antifouling, allelopathy and chemical defense against herbivores. However, very few methods are available for the investigation of such surface metabolites. An approach is described in which surfaces are extracted by means of C18 solid phase material. By powdering wet algal surfaces with this material, organic compounds are adsorbed and can be easily recovered for subsequent liquid chromatography/mass spectrometry (LC/MS) and gas chromatography/mass spectrometry (GC/MS) investigations. The method is robust, picks up metabolites of a broad polarity range and is easy to handle. It is more universal compared to established solvent dipping protocols and it does not cause damage to the test organisms. A protocol is introduced for the macroalgae Fucus vesiculosus, Caulerpa taxifolia and Gracilaria vermiculophylla, but it can be easily transferred to other aquatic organisms.
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    Predator and prey: the role of the round goby Neogobius melanostomus in the western Baltic (2017)
    Taylor & Francis
    In:  Marine Biology Research, 13 (2). pp. 188-197.
    Details
    Publikationsdatum: 2020-01-02
    Beschreibung: Different studies on the position of the non-indigenous species Neogobius melanostomus within the coastal food web of the Pomeranian Bay (western Baltic) were performed, resulting in a quantitative and qualitative species list of prey organisms found in the stomachs of the invader and an estimation concerning the importance of round goby as prey for different resident predators. It seems that the colonization process is not fully completed yet, but the results reveal that the species is already established in the food web 16 years after the first observation within the study area. The results show that N. melanostomus feed upon a wide range of different resident organisms. While a direct predation effect on native fish species appears rather unlikely, indirect effects such as competition cannot yet be excluded. In addition, our results reveal an ontogenetic diet shift and that the round goby itself already serves as an important prey for piscivorous fish and seabirds. Finally, we formulate different hypotheses based on our results which will require further research.
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    Biological studies on the chokker squidloligo vulgaris reynaudii(Cephalopoda; Myopsida) on spawning grounds off the south-east coast of South Africa (1990)
    Taylor & Francis
    In:  South African Journal of Marine Science, 9 (1). pp. 11-26.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: The biology of the chokker squid Loligo vulgaris reynaudii on inshore grounds in the South-East Cape was studied by examination of trends in jig catches, length frequency analyses, length/weight relationships, analyses of maturity stages and SCUBA diving transects in a spawning area. Commercial catches probably reflected the influx of squid into shallow waters to spawn. Modal length at spawning was between 265 and 305 mm mantle length (ML) in males and between 175 and 195 mm ML in females. There was no modal progression to indicate growth, nearly all squid were mature, a percentage of males were spent, the level of feeding on the grounds was very low, and mantle walls were thinner than those of squid offshore. These factors all indicate that the squid population inshore had reached the end of its life cycle and was in the spawning phase. The sex ratio was biased towards males, an indication either of differential inshore migration or of greater longevity in males than in females. The frequency of occurrence of trawled egg capsules was highest in summer and all eggs were between 18 and 25 m deep. The preferred substratum for spawning appeared to be low-relief reef interspersed with coarse sand, and the stalks of egg capsules were always embedded in the sand to form individual clusters, as in most other loliginids. No evidence was found of post-spawning mortality in the areas examined.
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  • 34
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    Subduction initiation and ophiolite crust: new insights from IODP drilling (2017)
    Taylor & Francis
    In:  International Geology Review, 59 (11). pp. 1439-1450.
    Details
    Publikationsdatum: 2020-02-06
    Beschreibung: International Ocean Discovery Program (IODP) Expedition 352 recovered a high-fidelity record of volcanism related to subduction initiation in the Bonin fore-arc. Two sites (U1440 and U1441) located in deep water nearer to the trench recovered basalts and related rocks; two sites (U1439 and U1442) located in shallower water further from the trench recovered boninites and related rocks. Drilling in both areas ended in dolerites inferred to be sheeted intrusive rocks. The basalts apparently erupted immediately after subduction initiation and have compositions similar to those of the most depleted basalts generated by rapid sea-floor spreading at mid-ocean ridges, with little or no slab input. Subsequent melting to generate boninites involved more depleted mantle and hotter and deeper subducted components as subduction progressed and volcanism migrated away from the trench. This volcanic sequence is akin to that recorded by many ophiolites, supporting a direct link between subduction initiation, fore-arc spreading, and ophiolite genesis.
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  • 35
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    Sexual reproduction in four Caribbean commercial sponges. II. Oogenesis and transfer of bacterial symbionts (1991)
    Taylor & Francis
    In:  Invertebrate Reproduction & Development, 19 (1). pp. 13-24.
    Details
    Publikationsdatum: 2017-02-01
    Beschreibung: Oogenesis in four commercial Caribbean sponge species, Hippospongia lachne, Spongia barbara, S. cheiris and S. graminea, was studied using light and transmission electron microscopy. Eggs and embryos develop asynchronously in localized endosomal nurseries of these viviparous and gonochoristic species. Statistical analyses of specific morphological characteristics of reproductive elements have unequivocally identified four specific stages in the process of oogenesis. Oogonia undergo mitotic division to produce primary oocytes. Meiotic division occurs producing secondary oocytes which are fertilized before zygotes undergo major growth by phagocytosis and the transfer of nutrients through cytoplasmic bridges. During cleavage of the zygote, umbilici form between embryos and nurse cell layers and these function in the transfer of symbiotic bacteria and other mesohyl substances from the maternal parent to the embryo. These symbionts were observed dispersed between blastomeres of all young and maturing embryos and between internal cells of cytodifferentiated parenchymella larvae. Extracellular transfer of symbiotic bacteria from maternal tissues to developing embryos has not been reported in any other viviparous invertebrate.
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    Distribution and morphological characters of immature Martialia hyadesi (Cephalopoda: Oegopsida) in New Zealand waters (1991)
    Taylor & Francis
    In:  New Zealand Journal of Marine and Freshwater Research , 25 . pp. 275-282.
    Details
    Publikationsdatum: 2020-06-22
    Beschreibung: Before 1985, Martialia hyadesi (Cephalopoda: Ommastrephidae) in the Pacific Ocean was known only from the Eltanin Fracture Zone and Macquarie Island. A joint Japan‐New Zealand squid survey around New Zealand captured many immature ommastrephid squids. Gel electrophoresis confirmed the presence of immature M. hyadesi. Aspects of the external morphology are described. The distinctive tentacle club was evident in the smallest specimen examined, 19 mm dorsal mantle length (ML). Arm trabeculae were first evident in specimens of 40–50 mm ML. Immature squid were distributed around and southward of the Subtropical Convergence Zone. The presence of very small squid (〈 10 mm ML) indicated spawning on or near the Auckland Island Shelf.
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    Cephalopods eaten by wandering albatrosses (Diomedea exulansL.) breeding at six circumpolar localities (1992)
    Taylor & Francis
    In:  Journal of the Royal Society of New Zealand, 22 (4). pp. 243-263.
    Details
    Publikationsdatum: 2020-07-16
    Beschreibung: The beaks of 9,994 cephalopods of 61 species, obtained mainly from chick regurgitations of wandering albatrosses (Diomedea exulans L.) at Gough, Auckland, Antipodes, Prince Edward and Macquarie Islands and South Georgia, were used to specify and calculate the biomass of cephalopods consumed. Histioteuthidae were most important by numbers and biomass at Gough Island (in warmest seas), but Onycboteuthidae increasingly superseded them southwards; Kondakovia longimana formed 59 to 75% of biomass eaten at the three localities nearest the Antarctic Polar Front. Other important families were Octopoteuthidae, Cranchiidae, Architeuthidae (juveniles) and Ommastrephidae (South Georgia only). Most frequently eaten were Histioteuthis atlantica 13.7%, Galiteuthis glacialis 12.4%, H. eltaninae 12.0% and Kondakovia longimana 11.6%. Wandering albatrosses rearing chicks can forage at least to 3,000 km in a single foray, and may exploit an important food source about 1200 km from the nest (as in the probable commensalism of South Georgian birds with the Falkland Islands fishery). They feed, sometimes opportunistically, on cephalopods active or moribund at the surface, or discarded or lost by trawlers, cetaceans or seals. Vertically migrating cephalopods, especially bioluminescent species, are disproportionately frequent in their non-commensal diet, suggesting that they often feed at night.
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  • 38
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    Big squid in big currents (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 225-235.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: A link is proposed between the processes that led to the evolution of large species of squid and the highly variable, cyclic recruitment seen in squid fisheries. Maximum growth requires maximal feeding and minimal routine metabolism at optimum temperatures, which decrease as squid grow. Topographically induced upwelling zones, inshore of western boundary currents, provide productive environments with appropriate temperatures for all life stages. Most squid are small and live in the tropics or subtropics; locomotor constraints prevent them from swimming long distances. Long annual migrations to spawn upstream in current systems require short-lived squids to maximize rates of growth. Therefore, such systems provide the opportunity and a powerful selective advantage for large size and rapid growth. Increased fecundity and cannibalism provide additional directional selection for large individuals. Current systems show food production peaks (blooms); paralarval release must match these to increase survival. Because squid are semelparous, disruption of delicately balanced lifecycles by physical events can virtually annihilate stocks. Recovery probably requires that populations of large squid "re-evolve" from smaller, more-stable tropical populations of small squid. This recovery phase may extend the "down-side" of abundance cycles. Studies of squid/current systems have focused on western boundary currents, but the Illex complex also associates with eastern boundaries. Such populations are generally smaller than in larger systems, supporting the hypothesis, but more detailed comparisons are required.
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    The distribution and abundance of cephalopods on the continental slope of the eastern South Atlantic (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 739-752.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: During a cruise in March 1988 dedicated to investigation of the marine resources of South Africa's continental slope, 62 species in 22 families of Cephalopoda were collected from the Cape Canyon and Cape Point Valley. Multivariate analysis revealed a clear distinction between cephalopods of the upper and lower continental slope in both benthic and epibenthic habitats. Todaropsis eblanae and Todarodes angolensis were indicator species for the upper slope benthic, from 300 to 500 m, but on the lower slope, in 700–900 m of water, they were replaced by Histioteuthis miranda and Opisthoteuthis agassizii. In the epibenthic, both upper and lower slopes were dominated by Abraliopsis gilchristi and Lycoteuthis ?diadema, but other species characteristic of the lower slope were the oceanic species Mastigoteuthis hjorti, Ctenopteryx sicula and Taonius sp. A. Cranchia scabra indicated the presence of oceanic water at stations 700–900 m deep. Other species of significance in the catches were Todarodes filippovae, Histioteuthis macrohista, Rossia enigmatica and Bathypolypus valdiviae. Species affinities indicate that the cephalopod fauna of the southern African continental slope includes the following zoogeographic components: southern African endemic, circum-Subantarctic species associated with Antarctic Intermediate Water, circum-global southern tropical/subtropical, tropical Indo-Pacific and cosmopolitan tropical/subtropical.
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  • 40
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    The importance of cephalopods as prey for hake and other groundfish in South African waters (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 651-662.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: Literature on trophic relationships in the Benguela ecosystem has stressed the importance of cephalopods as prey of groundfish. The groundfish community of the shelf and upper slope of southern Africa is dominated by the Cape hakes, and the results presented (1984–1991) confirm that both species of hake are important predators of cephalopods, especially taking into consideration the abundance of hake in the ecosystem. However, geographic, seasonal and species variability are evident in the patterns observed. The main prey species are Sepia spp. (predominantly Sepia australis), Loligo vulgaris reynaudii, Todaropsis eblanae and Lycoteuthis ?diadema. The last-named is an important food organism for fish. Its systematic status needs revision, however. Qualitative results of studies of cephalopod predation are also provided for kingklip and monkfish.
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  • 41
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    Cephalopods and the Benguela ecosystem: trophic relationships and impact (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 791-802.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: Cephalopods of importance in the Benguela ecosystem include Loligo vulgaris reynaudii, Todarodes angolensis, Todaropsis eblanae, Lycoteuthis ?diadema, Sepia australis, Octopus spp. (up to three species) and Argonauta spp., and possibly also Ocythoe tuberculata and Rossia enigmatica. Species which may prove important as a result of further research are Lolliguncula mercatoris, Ommastrephes bartramii, Todarodes filippovae, Histioteuthis miranda and Abraliopsis gilchristi. "Importance" is defined on the basis of "survey abundance" (including commercial fisheries) and their trophic links with other organisms. Use of the latter criterion indicates that Sepia australis, Todaropsis eblanae and Lycoteuthis ?diadema are sufficiently abundant to be exploited by fisheries. Unknown factors are dispersal, availability and market considerations. The only examples of cephalopods feeding on commercial species of fish are Loligo v. reynaudii feeding on anchovy Engraulis capensis and Cape hakes Merluccius capensis and/or M. paradoxus in the southern Benguela and Todarodes angolensis preying on Cape hake in the northern Benguela. Such feeding is opportunistic and is not believed to threaten the fish stocks. Predators of cephalopods are mostly opportunistic, switching to other prey when cephalopods are not available. There is no evidence that such predators pose a threat to the Loligo fisheries. The opportunistic nature of cephalopods as prey and predators makes quantification of predation (in both directions) difficult. Data for such quantification are, as yet, unavailable.
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    Cephalopods of the Benguela Current off Namibia: new additions and considerations on the genus Lycoteuthis (1993)
    Taylor & Francis
    In:  Journal of Natural History, 27 (1). pp. 15-46.
    Details
    Publikationsdatum: 2020-07-21
    Beschreibung: The present study contributes new information on the cephalopods off Namibia, contains the first record of Ornithoteuthis volatilis (Sasaki, 1915) in the Atlantic, and adds records of six species in the Benguela Current and three species in Namibian waters. The presence of certain species seldom encountered in the Benguela Current has been confirmed. A compilation of the cephalopod fauna off Namibia had also been included, listing 65 species. Additional morphological data on Stoloteuthis leucoptera, Lycoteuthis lorigera, Architeuthis sp., Pholidoteuthis boschmai, Ornithoteuthis volatilis, Eledone nigra, and Graneledone sp. have been provided. The status of the genus Lycoteuthis has been reviewed in the light of the first collection of Lycoteuthis lorigera (Steenstrup, 1875) males in the Atlantic, and Lycoteuthis diadema (Chun, 1900) has been considered to be a synonym for Lycoteuthis lorigera
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  • 43
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    Abundance and distribution of rhynchoteuthion larvae ofIllex argentlnus(Cephalopoda: Ommastrephidae) in the south-western Atlantic (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 927-941.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: The results of ichthyoplankton surveys carried out by the Instituto Nacional de Pesca (INAPE) in the Argentine–Uruguayan Common Fishing Zone (AUCFZ) in summer 1980 and the winters of 1980–1982 are presented. In addition, the results of joint research with INIDEP, the Argentine and Japan Fisheries Agency, on larvae, juveniles and adults of the short-finned squid Illex argentinus carried out in winter 1989 are given, as are data obtained during the joint sardine and anchovy recruitment project carried out by R.V. Meteor in November/December 1989. The short-finned squid Illex argentinus is the most important cephalopod resource of the area, and an extended fishery is carried out on the Patagonian shelf and in the proximity of the Falkland Islands. The fishing season in the AUCFZ, for pre-spawning and spawning animals, extends from early autumn to winter (March–August). Abundance of rhynchoteuthion larvae (417–485 larvae·10 m−2) was greatest in winter in surface temperatures of 12,1–16,9°C and surface salinities of 34,8 – 35,2 × 10−3. The distribution of the larvae is related to the western boundary of the Brazil Current and the convergence front.
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  • 44
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    Can the Loligosquid fishery be managed effectively? A synthesis of research on Loligo vulgaris reynaudii (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 903-918.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: The question whether the chokka squid Loligo vulgaris reynaudii resource can be managed effectively is examined in the light of developments in the fishery and knowledge of the resource gathered in recent years. The history of the fishery since its inception in 1985, management controls and the current state of knowledge of stock identity, distribution, seasonality and abundance, life cycle and population dynamics are reviewed as a background to a discussion of management alternatives. Long-term measures, such as fleet limitation, seasonal closures and de facto closed areas and size limits, all appropriate in the early stages of a fishery when knowledge is limited, should be replaced by more-flexible alternatives as knowledge improves. Methods of stock assessment, stock-recruitment studies and further basic biological analyses are recognized as being crucial to improving management methods. An explanation embracing physical oceanographic features and plankton productivity in the vicinity of the spawning grounds is advanced for the mechanisms underlying hatchling survival. The possible contribution of trophic studies to squid management is recognized. Effective management of the chokka squid resource is concluded to be possible provided that the specific areas needing attention be addressed by means of goal-orientated research. Rational, but not necessarily optimal, management decisions can, however, be made even in the absence of stock-recruitment data, by the employment of common-sense measures which generally include some form of effort control.
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  • 45
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    Inhibitory potential of strepthonium A against Shiga toxin production in enterohemorrhagic Escherichia coli (EHEC) strain EDL933 (2017)
    Taylor & Francis
    In:  Natural Product Research, 31 (23). 2818-2823 .
    Details
    Publikationsdatum: 2020-02-06
    Beschreibung: The production of shiga toxin (Stx) is a critical step in the establishment and progress of enterohemorrhagic Escherichia coli (EHEC) infections. The possible release of Stx from dead and dying bacteria, and the risk of resistance development have restricted the usage of antibiotics against EHEC. The chlorinated quaternary ammonium compound, strepthonium A, was isolated from the culture of Streptomyces sp. SBT345 that was cultivated from the Mediterranean sponge Agelas oroides. The structure was elucidated and confirmed by spectroscopic analyses including 1D and 2D NMR, ESI-HRMS, as well as ESI-HRMS2. Strepthonium A follows Lipinski's rule of five with respect to its molecular weight, CLogP values and the number of hydrogen acceptors and donors. Verotoxin ELISA assay demonstrated that Strepthonium A reduced the Stx production in EHEC strain EDL933 at 80 μM concentration without growth inhibition. This study demonstrates the potential of strepthonium A in restraining the production of Stx in EHEC infections.
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  • 46
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    Urbanization dynamics of Tehran city (1975–2015) using artificial neural networks (2017)
    Taylor & Francis
    In:  Journal of Maps, 13 (1). pp. 24-30.
    Details
    Publikationsdatum: 2020-02-06
    Beschreibung: Land-use dynamic is a major challenge for town and country planners especially in developing countries such as Iran. Iran has been under rapid urban expansion and population growth for past three decades which led to lack of resources, environmental deterioration and haphazard landscape development. In this paper, an attempt has been made to map the urbanization dynamics of Tehran in 40 years based on remote sensing imagery and by means of artificial neural networks. The presented scheme could be taken into consideration when planning initiatives aimed at surveying, monitoring, managing and sustainable development of the territory. Moreover, it can serve the experts in the fields of geography, urban studies and planning as a background for number of geographical analyses.
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  • 47
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    An annotated list of deep-sea fishes collected in the northern Red Sea, Gulf of Aqaba (1993)
    Taylor & Francis
    In:  Israel Journal of Zoology, 39 (4). pp. 299-336.
    Details
    Publikationsdatum: 2017-08-10
    Beschreibung: During the years 1989–1993 an intensive collection of fishes from the aphotic zone (below 150 m) of the northern part of the Gulf of Aqaba was conducted. This survey recorded 69 fish species, 8 elasmobranchs, and 61 teleosts, belonging to 45 families. Fifteen species are endemic to the Red Sea: Mustelus mosis, Narcine bentuviai, Rhinobatos punctifer, Ophichthus echeloides, Rhynchoconger sp., Physiculus marisrubri, Ostichthys hypsipterygion sufensis, Pterygotrigla sp., Uranoscopus marisrubri, Parascolopsis sp.1 and sp. 2, Atrobucca geniae, Chromis pelloura, Samariscus sp., Thamnaconus modestoides erythraeensis. Eleven species are new records for the Red Sea: Gymnothorax johnsoni, Rhynchoconger sp., Synodus doaki, Pterygotrigla sp., Chelidoperca pleurospilus, Carangoides equula, Parascolopsis sp. 1 and sp. 2, Bodianus leucostictus, Paracaesio sordidus, and Samariscus sp. Two species, Cociella crocodilo and Parascolopsis eriomma, are first substantiated records for the Red Sea. None of the species recorded in this list is considered conventional deep-sea fishes. The ichthyofauna of the aphotic zone of the Gulf of Aqaba is composed of species of shallower origin.
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  • 48
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    A new flow-through bioassay for testing low-emission antifouling coatings (2017)
    Taylor & Francis
    In:  Biofouling, 33 (8). pp. 613-623.
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    Publikationsdatum: 2020-02-06
    Beschreibung: Current antifouling (AF) technologies are based on the continuous release of biocides into the water, and consequently discharge into the environment. Major efforts to develop more environmentally friendly coatings require efficient testing in laboratory assays, followed by field studies. Barnacles are important fouling organisms worldwide, increasing hydrodynamic drag on ships and damaging coatings on underwater surfaces, and thus are extensively used as models in AF research, mostly in static, laboratory-based systems. Reliable flow-through test assays for the screening of biocide-containing AF paints, however, are rare. Herein, a flow-through bioassay was developed to screen for diverse low-release biocide paints, and to evaluate their effects on pre- and post-settlement traits in barnacles. The assay distinguishes between the effects from direct surface contact and bulk-water effects, which are crucial when developing low-emission AF coatings. This flow-through bioassay adds a new tool for rapid laboratory-based first-stage screening of candidate compounds and novel AF formulations.
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  • 49
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    Trichocitrin, a new fusicoccane diterpene from the marine brown alga-endophytic fungusTrichoderma citrinoviridecf-27 (2016)
    Taylor & Francis
    In:  Natural Product Research, 30 (14). pp. 1605-1610.
    Details
    Publikationsdatum: 2019-02-01
    Beschreibung: One new diterpene, trichocitrin (1), and four known secondary metabolites, nafuredin (2), 5-hydroxy-2,3-dimethyl-7-methoxychromone (3), 24-methylenecycloartanol (4) and citrostadienol (5), were isolated from the culture of marine brown alga-endophytic Trichoderma citrinoviride cf-27. Trichocitrin (1) represents the first Trichoderma-derived and furan-bearing fusicoccane diterpene, and its structure and relative configuration were identified by analysis of 1D/2D NMR and mass spectroscopic data. Compounds 1 and 2 exhibited 8.0- and 9.5-mm inhibition zones, respectively, against Escherichia coli at 20 μg/disc and 54.1 and 36.7% growth inhibition, respectively, of Prorocentrum donghaiense at 80 μg/mL.
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  • 50
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    Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352) (2018)
    Taylor & Francis
    In:  International Geology Review, 60 (15). pp. 1816-1854.
    Details
    Publikationsdatum: 2021-02-08
    Beschreibung: New biostratigraphical, geochemical, and magnetic evidence is synthesized with IODP Expedition 352 shipboard results to understand the sedimentary and tectono-magmatic development of the Izu–Bonin outer forearc region. The oceanic basement of the Izu–Bonin forearc was created by supra-subduction zone seafloor spreading during early Eocene (c. 50–51 Ma). Seafloor spreading created an irregular seafloor topography on which talus locally accumulated. Oxide-rich sediments accumulated above the igneous basement by mixing of hydrothermal and pelagic sediment. Basaltic volcanism was followed by a hiatus of up to 15 million years as a result of topographic isolation or sediment bypassing. Variably tuffaceous deep-sea sediments were deposited during Oligocene to early Miocene and from mid-Miocene to Pleistocene. The sediments ponded into extensional fault-controlled basins, whereas condensed sediments accumulated on a local basement high. Oligocene nannofossil ooze accumulated together with felsic tuff that was mainly derived from the nearby Izu–Bonin arc. Accumulation of radiolarian-bearing mud, silty clay, and hydrogenous metal oxides beneath the carbonate compensation depth (CCD) characterized the early Miocene, followed by middle Miocene–Pleistocene increased carbonate preservation, deepened CCD and tephra input from both the oceanic Izu–Bonin arc and the continental margin Honshu arc. The Izu–Bonin forearc basement formed in a near-equatorial setting, with late Mesozoic arc remnants to the west. Subduction-initiation magmatism is likely to have taken place near a pre-existing continent–oceanic crust boundary. The Izu–Bonin arc migrated northward and clockwise to collide with Honshu by early Miocene, strongly influencing regional sedimentation.
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  • 51
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    Taxonomy, biology and phylogeny of Miraciidae (Copepoda: Harpacticoida) (1994)
    Taylor & Francis
    In:  Sarsia, 79 (3). pp. 207-283.
    Details
    Publikationsdatum: 2018-04-19
    Beschreibung: The holoplanktonic family Miraciidae (Copepoda, Harpacticoida) is revised and a key to the four monotypic genera presented. Amended diagnoses are given for Miracia Dana, Oculosetella Dahl and Macrosetella A. Scott, based on complete redescriptions of their respective type species M. efferata Dana, 1849, O. gracilis (Dana, 1849) and M. gracilis (Dana, 1847). A fourth genus Distioculus gen. nov. is proposed to accommodate Miracia minor T. Scott, 1894. The occurrence of two size-morphs of M. gracilis in the Red Sea is discussed, and reliable distribution records of the problematic O. gracilis are compiled. The first nauplius of M. gracilis is described in detail and changes in the structure of the antennule, P2 endopod and caudal ramus during copepodid development are illustrated. Phylogenetic analysis revealed that Miracia is closest to the miraciid ancestor and placed Oculosetella-Macrosetella at the terminal branch of the cladogram. Various aspects of miraciid biology are reviewed, including reproduction, postembryonic development, vertical and geographical distribution, bioluminescence, photoreception and their association with filamentous Cyanobacteria (Trichodesmium).
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  • 52
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    Sexual reproduction in four Caribbean commercial sponges. I. Reproductive cycles and spermatogenesis (1991)
    Taylor & Francis
    In:  Invertebrate Reproduction & Development, 19 (1). pp. 1-11.
    Details
    Publikationsdatum: 2017-02-01
    Beschreibung: Sexual reproductive cycles of a Florida, U.S.A., population of four Caribbean commercial sponge species, Hippospongia lachne, Spongia barbara, S. cheiris and S. graminea, were determined by analysis of tissue samples collected over a three-year period. Spermatogenesis in these species was studied using light and transmission electron microscopy. The production of male gametes occurs in cysts within the endosomal tissue of mature specimens. Reproductive elements within an individual cyst develop synchronously while development between cysts is asynchronous. All available evidence suggests that these species are dioecious. Spermatogonia differentiate directly from choanocytes in situ. All cells of the chamber lose their collars and flagella and undergo mitosis to produce primary spermatocytes, each possessing a single flagellum. The ratio of nucleus to cell diameter in these cells is almost double that of choanocytes. Circumstantial evidence suggests that primary spermatocytes undergo meiosis to produce four spermatids, but confirmational chromatid linkage figures are still lacking. The mature spermatozoa lack both intermediate segments and acrosomes. Male gametes displayed a bright yellow-white autofluorescence when excited with blue light (460–485 nm).
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  • 53
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    Food of squidLoligo vulgaris reynaudii(Cephalopoda: Loliginidae) on their spawning grounds off the Eastern Cape, South Africa (1991)
    Taylor & Francis
    In:  South African Journal of Marine Science, 10 (1). pp. 193-201.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: Squid on their spawning grounds feed mainly at night when they are more dispersed. In all, 28,5 per cent of squid sampled at night had food in their stomachs, whereas only 6,7 per cent of those collected by day had food. Most stomachs contained only a single prey species (90,8% of those analysed). Teleosts dominated the prey of squid collected at night (58%M), followed by crustaceans (25%), polychaetes (9%) and cephalopods (3%). By day the prey was dominated by cephalopods (61%), followed by teleosts (20%), crustaceans (14%) and polychaetes (2%). Bregmaceros sp. was the most frequently identified teleost, Loligo vulgaris reynaudii (cannibalism) the dominant cephalopod, ?Betaeus sp. (Alpheidae; pieces of coral were also found) the commonest crustacean and Nereis sp. the commonest polychaete. There were seasonal differences in the diet too: squid caught during summer seemed to have similar proportions of the four main prey components. Also, the incidence of feeding was higher than in winter. There were, however, no significant differences in stomach mass expressed as a percentage of body mass between day and night nor between season nor between sexes. The average stomach mass of all samples was 0,6 per cent of body mass, less than on the feeding grounds, where it is generally about 2 per cent.
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  • 54
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    Abundance and distribution of rhynchoteuthion larvae ofIllex argentlnus(Cephalopoda: Ommastrephidae) in the south-western Atlantic (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 927-941.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: The results of ichthyoplankton surveys carried out by the Instituto Nacional de Pesca (INAPE) in the Argentine–Uruguayan Common Fishing Zone (AUCFZ) in summer 1980 and the winters of 1980–1982 are presented. In addition, the results of joint research with INIDEP, the Argentine and Japan Fisheries Agency, on larvae, juveniles and adults of the short-finned squid Illex argentinus carried out in winter 1989 are given, as are data obtained during the joint sardine and anchovy recruitment project carried out by R.V. Meteor in November/December 1989. The short-finned squid Illex argentinus is the most important cephalopod resource of the area, and an extended fishery is carried out on the Patagonian shelf and in the proximity of the Falkland Islands. The fishing season in the AUCFZ, for pre-spawning and spawning animals, extends from early autumn to winter (March–August). Abundance of rhynchoteuthion larvae (417–485 larvae·10 m−2) was greatest in winter in surface temperatures of 12,1–16,9°C and surface salinities of 34,8 – 35,2 × 10−3. The distribution of the larvae is related to the western boundary of the Brazil Current and the convergence front.
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  • 55
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    Biological and chemical diversity in Antarctica: from new species to new natural products (2016)
    Taylor & Francis
    In:  Biodiversity, 17 (1-2). pp. 5-11.
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    Publikationsdatum: 2017-03-31
    Beschreibung: Antarctica is a still unexplored area in many respects, among which biological diversity and, even more so, chemical diversity are important challenges. Over recent years, our research group has been studying marine benthic ecosystems in different Antarctic areas. These studies yielded several interesting discoveries, including species new to science, as well as new natural products never seen before. Overall, we have been trying to unravel the complex network of interactions that exist between marine benthic organisms in these cold and hardly accessible ecosystems. We present here an overview of our recent results regarding the biological and the chemical diversity of these organisms. In fact, these ecosystems are as complex as many other marine environments on the planet, and indeed, many questions remain yet to be answered.
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  • 56
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    The missing half of the subduction factory: shipboard results from the Izu rear arc, IODP Expedition 350 (2017)
    Taylor & Francis
    In:  International Geology Review, 59 (13). pp. 1677-1708.
    Details
    Publikationsdatum: 2020-02-06
    Beschreibung: IODP Expedition 350 was the first to be drilled in the rear part of the Izu-Bonin, although several sites had been drilled in the arc axis to fore-arc region; the scientific objective was to understand the evolution of the Izu rear arc, by drilling a deep-water volcaniclastic section with a long temporal record (Site U1437). The Izu rear arc is dominated by a series of basaltic to dacitic seamount chains up to ~100-km long roughly perpendicular to the arc front. Dredge samples from these are geochemically distinct from arc front rocks, and drilling was undertaken to understand this arc asymmetry. Site U1437 lies in an ~20-km-wide basin between two rear arc seamount chains, ~90-km west of the arc front, and was drilled to 1804 m below the sea floor (mbsf) with excellent recovery. We expected to drill a volcaniclastic apron, but the section is much more mud-rich than expected (~60%), and the remaining fraction of the section is much finer-grained than predicted from its position within the Izu arc, composed half of ashes/tuffs, and half of lapilli tuffs of fine grain size (clasts 〈3 cm). Volcanic blocks (〉6.4 cm) are only sparsely scattered through the lowermost 25% of the section, and only one igneous unit was encountered, a rhyolite peperite intrusion at ~1390 mbsf. The lowest biostratigaphic datum is at 867 mbsf (~6.5 Ma), the lowest palaeomagnetic datum is at ~1300 mbsf (~9 Ma), and the rhyolite peperite at ~1390 mbsf has yielded a U–Pb zircon concordia intercept age of (13.6 + 1.6/−1.7) Ma. Both arc front and rear arc sources contributed to the fine-grained (distal) tephras of the upper 1320 m, but the coarse-grained (proximal) volcaniclastics in the lowest 25% of the section are geochemically similar to the arc front, suggesting arc asymmetry is not recorded in rocks older than ~13 Ma.
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  • 57
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    Population-Size and Breeding Success of Emperor Penguins Aptenodytes forsteriat Auster and Taylor Glacier Colonies, Mawson Coast, Antarctica (1992)
    Taylor & Francis
    In:  Emu, 92 (2). pp. 65-71.
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    Publikationsdatum: 2020-07-31
    Beschreibung: The population size and breeding success of Emperor Penguins Aptenodytes forsteri at the Auster and Taylor Glacier colonies were estimated during the 1988 breeding season. At Auster a total of 10 963 pairs produced about 6350 fledglings for a breeding success of 58%. At Taylor Glacier about 2900 pairs raised 1774 fledglings for a breeding success of 61%. Fledglings left Taylor Glacier over a period of 33 days at a mean mass of 10.56 kg.
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  • 58
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    Challenges and strategies for the visual exploration of complex environmental data (2017)
    Taylor & Francis
    In:  International Journal of Digital Earth, 10 (10). pp. 1070-1076.
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    Publikationsdatum: 2020-02-06
    Beschreibung: In this opinion paper, we, a group of scientists from environmental-, geo-, ocean- and information science, argue visual data exploration should become a common analytics approach in Earth system science due to its potential for analysis and interpretation of large and complex spatio-temporal data. We discuss the challenges that appear such as synthesis of heterogeneous data from various sources, reducing the amount of information and facilitating multidisciplinary, collaborative research. We argue that to fully exploit the potential of visual data exploration, several bottlenecks and challenges have to be addressed: providing an efficient data management and an integrated modular workflow, developing and applying suitable visual exploration concepts and methods with the help of effective and tailored tools as well as generating and raising the awareness of visual data exploration and education. We are convinced visual data exploration is worth the effort since it significantly facilitates insight into environmental data and derivation of knowledge from it.
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  • 59
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    Do hexactinellids structure antarctic sponge associations? (1992)
    Taylor & Francis
    In:  Ophelia, 36 (2). pp. 111-118.
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    Publikationsdatum: 2018-03-01
    Beschreibung: This paper presents an idea on the possible structuring effect of hex actinellids on Antarctic sponge associations. To this end, information derived from underwater photography performed on the eastern Weddell Sea shelf is reported and original trawl data are presented. Underwater photography shows the existence of different sponge associations; species poor associations are connected to soft bottom, species rich associations exist on substrates characterized by bryozoan debris and especially sponge spicule mats. The trawl. catches show differences in the population structure of a hexactinellid sponge, Rassella racovitzae Topsent at two stations, distinguishable from each other by substrate structure. On average small and therefore probably young specimens were found on bryozoan debris, while a population with larger and probably older specimens was found on solid hexactinellid spicule mats. These observations form the basis for the hypothesis that hexactinellid sponges are a major biological structuring agent for Antarctic sponge associations; they colonize soft substrate and bryozoan debris dominated areas and subsequently change the quality of the substrate by spicule deposition. The ensuing spicule mats are a suitable settling ground for a large number of demosponge species dependent on hard substrates. Mass occurrences of hexactinellids are also found in areas other than Antarctica. The phenomenon recognized in the Weddell Sea probably occurs more widely spread.
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  • 60
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    A method for the detection of clouds using AVHRR infrared observations (1992)
    Taylor & Francis
    In:  International Journal of Remote Sensing, 13 (10). pp. 1829-1841.
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    Publikationsdatum: 2018-03-09
    Beschreibung: A method is proposed for cloud detection over sea using a single infrared channel of a high spatial resolution satellite radiometer. The method combines a spatial coherence test and an absolute threshold test for the temperature field. The threshold for the second test is automatically determined by a histogram analysis of data which were preselected by the coherence test. The coherence test used differs from the classical standard deviation test in the way of the test value computation: the weight of the pixel to be investigated is increased. A simulation shows that under conditions of low cloud cover this makes the proposed coherence test more sensitive than the standard deviation test. When applied to real data the test was also found to be very sensitive compared with visible and IR threshold tests. Cloud cover obtained by the whole method is finally compared with that resulting from the visible and IR histogram analysis procedure of Phulpin et al. This comparison indicates a high reliability of the proposed method.
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  • 61
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    Gammarid amphipods and littorinid snails have significant but different effects on algal succession in littoral fringe tidepools (1993)
    Taylor & Francis
    In:  Ophelia, 38 (2). pp. 69-88.
    Details
    Publikationsdatum: 2018-03-22
    Beschreibung: Tests on the effects of two herbivore groups (littorinid snails and gammarid amphipods), on algal succession in high intertidal tidepools dominated by Fucus distichus showed that the grazer groups exert different grazing pressures on the algae. The differences can be related to the feeding morphologies ofthe two grazer guilds. The scraping, microphagous littorinid snails prevent the establishment of both micro- and rnacroalgae at the microscopic level. The biting, macrophagous gammarid amphipods are ineffective at grazing microalgae and prostrate macroalgae from the substratum, but exert a considerable influence on the erect macroalgae which escape littorinid grazing. Despite differences in feeding mechanisms, the magnitude of the effect of the two grazer groups on the canopy cover of macroalgae is similar.
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  • 62
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    Determination of Soil Parameters to Analyze Mechanical Behavior Using Lade's Double-Surface Work-Hardening Model (2016)
    Taylor & Francis
    In:  Marine Georesources & Geotechnology, 34 (5). pp. 465-473.
    Details
    Publikationsdatum: 2019-02-01
    Beschreibung: In this study, Lade's double-surface work-hardening constitutive model was adopted which uses the elasto-plasticity model as a basic conceptual framework. The model can analyze work hardening and work softening of nonlinear stress-strain behavior, and is regarded as superior to other elasto-plasticity constitutive models in terms of estimation. In the double-surface work-hardening constitutive model, 14 soil parameters are needed to estimate soil behaviors. To determine them, laboratory tests—isotropical consolidation test and conventional compression test—were conducted. Determining of soil parameters is highly complicated and time-consuming; randomness cannot be ruled out in determining parameters that are sensitive to stress-strain estimation, and error may occur. For this reason, a linear and nonlinear regression analysis was used to determine soil parameters. In estimation of undrained behavior, the estimated stress-strain behavior based on the two constitutive models largely overlapped with the test results. However, in estimating drained behavior, the outcome of the two models and the test results were mostly the same, but between the two models, the double-surface work-hardening constitutive model had a sharper slope in initial stress state, and a smaller maximum deviatoric stress.
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  • 63
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    Distribution and re-description ofAbraliopsis lineataGoodrich, 1896 (Cephalopoda: Enoploteuthidae) from the Arabian Sea (1991)
    Taylor & Francis
    In:  Journal of Natural History, 25 (5). pp. 1121-1133.
    Details
    Publikationsdatum: 2020-07-21
    Beschreibung: The enoploteuthid cephalopod Abraliopsis lineata is re-described and its generic position discussed. Specimens for the present study were captured during the Indian Ocean Expedition of RV Meteor in 1987, where the species occurred in considerable numbers. The geographical distribution of A. lineata is described and discussed. The detailed analysis of the photophore pattern of the present specimens differs from the original description. The diagnostic features in the male, especially the structure of the hectocotylus which separates A. lineata easily from the members of the subgenus Pfefferiteuthis, are outlined. The morphological differences which separate A. lineata from A. gilchristi, the only other member of the subgenus Micrabralia, are summarized.
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  • 64
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    Comparative analysis of the diets of smaller odontocete cetaceans along the coast of southern Africa (1992)
    Taylor & Francis
    In:  South African Journal of Marine Science, 12 (1). pp. 843-861.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: The diets of 20 species of smaller Odontoceti were investigated. The material was collected along the southern African coast between 1966 and 1990 and included 158 strandings, 29 animals killed incidentally and 49 animals caught under permit. In total, 57 species in 34 families of fish and 89 species in 24 families of cephalopods were identified from remains in the 236 stomachs investigated. Most Odontoceti fed on commercially unexploited cephalopods and fish, or on fish below commercially utilized sizes. However, the average sizes of anchovy and pilchard eaten by Delphinus delphis and Lagenorhynchus obscurus were larger than the sizes most frequently taken commercially. The species composition of the prey items reflected the onshore-offshore distribution (and possibly the foraging depths) of different Odontoceti. Tursiops truncatus and Cephalorhynchus heavisidii were closest to shore and D. delphis and L. obscurus over the continental shelf. The rest were distributed around the shelf-edge and just off the edge. A comparison of the stomach contents of stranded and non-stranded D. delphis, L. obscurus and C. heavisidii demonstrated that results from stranded animals are biased.
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  • 65
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    Effects of temperature on total phenolic compounds inCystoseira amentacea(C. Agardh) Bory (Fucales, Phaeophyceae) from southern Mediterranean Sea (2016)
    Taylor & Francis
    In:  Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology, 150 (1). pp. 152-160.
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    Publikationsdatum: 2019-02-01
    Beschreibung: The aim of this study was to test the effects of temperature on phenolic content of the brown seaweed Cystoseira amentacea. Phenolic compounds are secondary metabolites involved in different protection mechanisms as, for example, against grazers, epiphytes and UV radiation. Seasonal variations of phenolic content in C. amentacea were analysed and laboratory experiments, in which C. amentacea was exposed to an increase of temperature (25°C and 30°C), were performed. Total phenolic content (TPC) was determined colorimetrically with the Folin–Ciocalteu reagent. In C. amentacea, a seasonal pattern in TPC was observed, with a maximum value in winter-spring. C. amentacea responded significantly to the temperature treatments with a consistent decrease in TPC after 48 h.
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  • 66
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    The diets of Loligo vulgaris and L. forbesi(Cephalopoda: Loliginidae) in northwestern Spanish Atlantic waters (1994)
    Taylor & Francis
    In:  Sarsia, 79 (2). pp. 119-126.
    Details
    Publikationsdatum: 2020-05-28
    Beschreibung: The stomach contents of 723 Loligo vulgaris and 440 Loligo forbesi caught in the northwestern Spanish Atlantic waters have been examined. The diets of both species are described and compared. Loligo vulgaris shows 28 different types of prey belonging to four groups (Teleostei, Crustacea, Cephalopoda and Polychaeta) and Loligo forbesi 27 different types of prey belonging to three groups (Teleostei, Crustacea and Cephalopoda). Both species catch similar prey species but in different proportions. Cannibalism was observed in both species. Estimated prey sizes were smaller than squid sizes. No differences in feeding habits of males and females of both species were observed, but females seem to increase food intake during maturation. No significant changes were found in the diet of Loligo vulgaris within the size (DML) range studied (65–465 mm). Importance of cephalopods increased and importance of fish decreased in the diet of Loligo forbesi with growth (65–685 mm). Diet and food intake varied with seasons in both species. Diets of both squids were significantly different. Los contenidos estomacales de 723 Loligo vulgaris y 440 Loligo forbesi capturados en aguas de Galicia (Noroeste de España) fueron examinados. Se describe y compara la dieta de ambas especies. Se identificaron 28 tipos de presa diferentes en Loligo vulgaris que pertenecen a cuatro grupos (Teleostei, Crustacea, Cephalopoda y Polychaeta); y 27 tipos de presa en Loligo forbesi, pertenecientes a tres grupos (Teleostei, Crustacea y Cephalopoda). Ambas especies comen pres as similares, pero en proporciones diferentes. En ambas especies se observó canibalismo. La talla de las presas fue menor que la de los calamares. No se encontraron diferencias en la dieta entre machos y hembras en ambas especies, pero se observó que las hembras incrementan su tasa de ingestión durante la maduración. No se hallaron cambios significativos en la dieta de Loligo vulgaris en función de la talla (DML) dentro del rango de tamanos estudiado (65–465 mm). En Loligo forbesi, los cefalópodos aumentaron y los peces disminuyeron en importancia con la talla (65–685 mm DML). La dieta y la tasta de ingestión de ambas especies varió con la época del ano. Las dietas de ambas especies fueron significativemente diferentes entre sí.
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  • 67
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    Population genetics and reproductive strategies of two Notostraca (Crustacea) species from winter ponds in Israel (2016)
    Taylor & Francis
    In:  Zoology in the Middle East, 62 (4). pp. 331-341.
    Details
    Publikationsdatum: 2019-02-01
    Beschreibung: Fluorescent-amplified fragment length polymorphism (FAFLP) fingerprinting assay was used to compare the genetic diversity within and between tadpole shrimps (Notostraca) populations of Lepidurus apus (n=7) and Triops cancriformis (n=2) from rain pools in Israel. Each ephemeral water body has revealed a unique fingerprint pattern with an entailed genetic drift between nearby ponds. High similarity of genotypic diversity within each geographic area led to three clusters of water bodies, north, south and center of Israel. FAFLP assays on several newly hatched individuals of T. cancriformis revealed high identity amongst kin, as compared to L. apus where newly hatched from the same maternal source showed high diversity. Results indicate that T. cancriformis populations from Israel are probably parthenogenetic as indicated by clonal structures. The higher genetic variability in the L. apus populations and in laboratory-hatched specimens indicates the existence of sexual reproduction.
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  • 68
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    Length-weight relationships of Ponto-Caspian gammarids that have overcome the salinity barrier of the southern Baltic Sea coastal waters (2016)
    Taylor & Francis
    In:  Marine and Freshwater Behaviour and Physiology, 49 (6). pp. 407-413.
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    Publikationsdatum: 2020-07-09
    Beschreibung: Gammarids from the Caspian complex have invaded many European waters along the rivers and canals of the inland migration corridors. The species examined in this work are well known as invaders of European freshwater environments, so the colonization of brackish habitats is a phenomenon inviting more detailed investigation. The aim of this study was to determine the condition of the Ponto-Caspian gammarids Pontogammarus robustoides (G.O. Sars, 1894), Obesogammarus crassus (G.O. Sars, 1894), Dikerogammarus haemobaphes (Eichwald, 1841) and Dikerogammarus villosus (Sowinsky, 1894) as expressed by the relationship between total length and the wet weight of specimens in the brackish waters of the Gulf of Gdansk (Poland). The relationships can be regarded as responses to a newly expanded habitat after they overcome the salinity barrier of the southern Baltic Sea coastal waters. All these Ponto-Caspian gammarids demonstrated an increase in weight with increasing total length: P. robustoides (b = 2.852), O. crassus (b = 3.3477), D. haemobaphes (b = 3.7855) and D. villosus (b = 2.6917). The results are an indicator of the relatively good condition of the organisms and indicate that the brackish environment of the Gulf of Gdansk affords them excellent possibilities for growth.
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  • 69
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    Identification of rosmarinic acid and sulfated flavonoids as inhibitors of microfouling on the surface of eelgrass Zostera marina (2017)
    Taylor & Francis
    In:  Biofouling, 10 . pp. 867-880.
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    Publikationsdatum: 2020-02-06
    Beschreibung: A bioassay-guided approach was used to identify defense compounds that are present on the surface of Zostera marina and which inhibit settlement of microfoulers at natural concentrations. Moderately polar eelgrass surface extracts inhibited the settlement of seven marine bacteria and one yeast that originated from non-living substrata. In contrast, five other bacterial strains that had been directly isolated from eelgrass surfaces were all insensitive, which suggested a selective effect of surface metabolites on the microbial communities present on eelgrass. Bioassay-guided isolation of active compounds from the extracts in combination with UPLC-MS and 1H-NMR spectroscopy resulted in the identification of rosmarinic acid, luteolin-7-sulfate and diosmetin-7-sulfate or its isomer chrysoeriol-7-sulfate. All three compounds are nontoxic repellents, as they did not inhibit bacterial growth, but prevented bacterial settlement in a dose-dependent manner. Between 15.6 and 106.8 μg ml−1 of rosmarinic acid were present on the eelgrass surface, enough for half maximal settlement inhibition of bacteria.
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  • 70
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    An evaluation of corallophelia pertusamucus as an analytical matrix for environmental monitoring: A preliminary proteomic study (2016)
    Taylor & Francis
    In:  Journal of Toxicology and Environmental Health, Part A, 79 (13-15). pp. 647-657.
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    Publikationsdatum: 2019-02-01
    Beschreibung: For the environmental monitoring of coral, mucus appears to be an appropriate biological matrix due to its array of functions in coral biology and the non-intrusive manner in which it can be collected. The aim of the present study was to evaluate the feasibility of using mucus of the stony coral Lophelia pertusa (L. pertusa) as an analytical matrix for discovery of biomarkers used for environmental monitoring. More specifically, to assess whether a mass-spectrometry-based proteomic approach can be applied to characterize the protein composition of coral mucus and changes related to petroleum discharges at the seafloor. Surface-enhanced laser desorption/ionization–time of flight mass spectrometry (SELDI-TOF MS) screening analyses of orange and white L. pertusa showed that the mucosal protein composition varies significantly with color phenotype, a pattern not reported prior to this study. Hence, to reduce variability from phenotype difference, L. pertusa white individuals only were selected to characterize in more detail the basal protein composition in mucus using liquid chromatography, mass spectrometry, mass spectrometry (LC-MS/MS). In total, 297 proteins were identified in L. pertusa mucus of unexposed coral individuals. Individuals exposed to drill cuttings in the range 2 to 12 mg/L showed modifications in coral mucus protein composition compared to unexposed corals. Although the results were somewhat inconsistent between individuals and require further validation in both the lab and the field, this study demonstrated preliminary encouraging results for discovery of protein markers in coral mucus that might provide more comprehensive insight into potential consequences attributed to anthropogenic stressors and may be used in future monitoring of coral health.
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  • 71
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    A new species of the genusSiboglinum(Pogonophora) from the North Atlantic off Portugal (1993)
    Taylor & Francis
    In:  Sarsia, 78 (3-4). pp. 255-264.
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    Publikationsdatum: 2018-03-05
    Beschreibung: A new species of Siboglinum is reported from off the Tejo mouth, Portugal. It was dredged from c. 1100 m. It resembles S. atlanticum and certain other species, in having paired white glandular stripes on the forepart. In the posterior trunk region we found small gram-negative internal symbiotic bacteria. All described species of the genus Siboglinum are equipped with a single tentacle, but one of our specimens bears two tentacles.
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  • 72
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    The use of satellites to monitor global transmission of microbes (1993)
    Taylor & Francis
    In:  International Journal of Remote Sensing, 14 (8). pp. 1447-1461.
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    Publikationsdatum: 2018-03-22
    Beschreibung: Most atmospheric parameters relevant to microbe dissemination into the atmosphere, including aerial transport and deposition, can be monitored by temperature and humidity, aerosols, clouds, precipitation, and wind through current meteorological and other satellite systems. A wide range of these parameters are already extracted and distributed operationally on a regional or global basis like cloudiness, cloud height, cloud motion, winds, surface temperature and atmospheric temperature profiles, and precipitation estimates, Some of these products like cloud motion, winds, and temperature profiles enter weather forecast models for initialization purposes. These models predict the global state of the atmosphere (some include precipitation and cloudiness) quite reliably for several days. Thus, an important part of the necessary technical framework for global disease spread and transmission monitoring exists.
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  • 73
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    Bonding degradation and stress–dilatancy response of weakly cemented sands (2017)
    Taylor & Francis
    In:  Geomechanics and Geoengineering, 12 (4). pp. 221-233.
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    Publikationsdatum: 2018-12-17
    Beschreibung: The progressive bond breakage of artificially cemented sands induced by shear straining was investigated through conventional isotropically consolidated drained triaxial compression tests. Sand specimens were prepared with a low degree of cementation by adopting a chemical grout. Test results were interpreted in terms of two stress–dilatancy theories for cohesive-frictional materials proposed in literature. The influence of debonding on the stress–dilatancy behaviour of cemented sands was analysed with particular emphasis on the ‘delayed dilatancy’ phenomenon. A bonding degradation curve was determined for each test relating the interparticle cohesion (c) to the magnitude of the total plastic strain vector (εd) and a bond degradation rate factor (Dc) was assessed from each curve. The maximum value of interparticle cohesion (c0) before the onset of bond degradation under shearing was found to correspond with a sharp decrease in the soil stiffness of the specimens. The influence of the effective confining stress (p′c)on both c0 and Dc parameters gathered from each test was also ascertained.
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  • 74
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    The role of high-pressure flow-through experiments for evaluating the mechanical behaviour of gas hydrate-bearing soils (2016)
    Taylor & Francis
    In:  In: Energy Geotechnics. , ed. by Wuttke, F., Bauer, S. and Sanchez, M. Taylor & Francis, London, pp. 437-443. ISBN 978-1-138-03299-6
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    Publikationsdatum: 2020-07-27
    Beschreibung: Results from two recent field trials, onshore in the Alaska permafrost and in the Nankai Trough offshore Japan, suggest that natural gas could be produced from marine gas hydrate reservoirs at compatible yields and rates. However, both field trials were accompanied by different technical issues, the most striking problems resulting from un-predicted geomechanical behaviour, sediment destabilization and catastrophic sand production. So far, there is a lack of experimental data which could help to understand relevant mechanisms and triggers for potential soil failure in gas hydrate production, to guide model development for simulation of soil behaviour in large-scale production, and to identify processes which drive or, further, mitigate sand production. We use high-pressure flow-through systems in combination with different online and in situ monitoring tools (e.g. Raman microscopy, MRI) to simulate relevant gas hydrate production scenarios. Key components for soil mechanical studies are triaxial systems with ERT (Electric resistivity tomography) and high-resolution localstrain analysis. Sand production control and management is studied in a novel hollow-cylinder-type triaxial setup with a miniaturized borehole which allows fluid and particle transport at different fluid injection and flow conditions. We further apply a novel large-scale high-pressure flow-through triaxial test system equipped with μ-CT to evaluate soil failure modes and triggers relevant to gas hydrate production and slope stability. The presentation will emphasize an in-depth evaluation of our experimental approach, and it is our concern to discuss important issues of translating laboratory results to gas hydrate reservoirs in nature. We will present results from high-pressure flow-through experiments which are designed to systematically compare soil mechanical behaviour of gas hydrate-bearing sediments in relevant production scenarios focusing on depressurization and CO2 injection. Experimental datasets are analyzed based on numerical models which are able to simulate coupled process dynamics during gas hydrate formation and gas production.
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  • 75
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    Historical validation of morphological stages of sexual maturity chokker squid loligo vulgaris reynaudii d'orb (Cephalopoda: Loliginidae) (1990)
    Taylor & Francis
    In:  South African journal of marine science, 9 . pp. 189-200.
    Details
    Publikationsdatum: 2020-05-26
    Beschreibung: Changes in the ovaries and testes during sexual maturation of Loligo vulgaris reynaudii were examined histologically. Fonnation and development of the spermatozoa and oocytes could be divided into four distinct stages for males and five for females, and frequencies of these stages in the morphologically determined categories of development of the whole reproductive System were calculated. These frequencies were then compared between morphological categories. Results showed that microscopic changes are reflected in macroscale changes for Categories I-IV, but differences between Categories IV and V are mostly morphological for both sexes. It is suggested that Loligo v. reynaudii is an intermittent spawner.
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  • 76
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    Estimation of Manganese Nodule Coverage Using Multi-Beam Amplitude Data (2015)
    Taylor & Francis
    In:  Marine Georesources & Geotechnology, 33 (4). pp. 283-288.
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    Publikationsdatum: 2017-01-19
    Beschreibung: Manganese nodule coverage is estimated based on multi-beam and deep-towed video nodule survey profiles of about 1,700 km in the China Pioneer Area of Eastern Pacific. Two statistical equations for estimating nodule coverage are derived separately from the multi-beam normal incidence amplitude data and angular amplitude data based on theoretical analysis of influence factors on multi-beam amplitude data. Predictions generated by the normal incidence amplitude model fall within 5% of real nodule coverage, and theoretically calculated angular amplitude data fits well with the original multi-beam amplitudes at incident angles larger than 20° according to nodule coverage estimated from the deep-towed video data.
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  • 77
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    Squids, cuttlefish and octopuses (1990)
    Taylor & Francis
    In:  Marine Behaviour and Physiology, 18 (1). pp. 1-17.
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    Publikationsdatum: 2020-07-14
    Beschreibung: General biology of cephalopods is described. First, all commercially important cephalopods are classified and the general morphology and distribution of all major families is described in detail. Mating and spawning characteristics of all major families are discussed in detail. This is followed by a discussion on early life history, growth and principal ecoological changes that occur during the growth period. Schooling and migration characteristics are also taken up in considerable detail. The paper closes with a brief discussion on the trophic relation. The author points out that cephalopods are extremely important to mankind due to their unique position in the food chain extending from the oceans to man.
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  • 78
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    Sexual reproduction in four Caribbean commercial sponges. III. Larval behaviour, settlement and metamorphosis (1991)
    Taylor & Francis
    In:  Invertebrate Reproduction & Development, 19 (1). pp. 25-35.
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    Publikationsdatum: 2017-02-01
    Beschreibung: Larval behaviour, settlement, and metamorphosis were investigated in four Caribbean commercial sponges, Hippospongia lachne, Spongia barbara, S. cheiris and S. graminea, using light and transmission electron microscopy. The parenchymella larvae of these viviparous and gonochoristic species have an average size of 350 μm by 420 μm when released. Symbiotic bacteria occur intercellularly in both larvae and post-larvae. Laboratory behavioural studies demonstrate that free-swimming larvae display directional swimming with constant lateral rotation and negative phototaxis. Larval settlement occurs 26–56 hours after release from the parent and involves the formation of a basal lamella between the post-larva and substrate. There is no evidence of larval substrate selection by type or orientation. The canal system begins to form six days after settlement and oscules are apparent eleven days post-settlement. Available evidence suggests that larval ciliated epithelial cells are terminally differentiated and do not appear to contribute to formation of post larva or adult in this group of Porifera.
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  • 79
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    Retrieval of suspended particulate matter from turbidity – model development, validation, and application to MERIS data over the Baltic Sea (2016)
    Taylor & Francis
    In:  International Journal of Remote Sensing . pp. 1-21.
    Details
    Publikationsdatum: 2019-02-01
    Beschreibung: Suspended particulate matter (SPM) causes most of the scattering in natural waters and thus has a strong influence on the underwater light field, and consequently on the whole ecosystem. Turbidity is related to the concentration of SPM which usually is measured gravimetrically, a rather time-consuming method. Measuring turbidity is quick and easy, and therefore also more cost-effective. When derived from remote sensing data the method becomes even more cost-effective because of the good spatial resolution of satellite data and the synoptic capability of the method. Turbidity is also listed in the European Union’s Marine Strategy Framework Directive as a supporting monitoring parameter, especially in the coastal zone. In this study, we aim to provide a new Baltic Sea algorithm to retrieve SPM concentration from in situ turbidity and investigate how this can be applied to satellite data. An in situ dataset was collected in Swedish coastal waters to develop a new SPM model. The model was then tested against independent datasets from both Swedish and Lithuanian coastal waters. Despite the optical variability in the datasets, SPM and turbidity were strongly correlated (r = 0.97). The developed model predicts SPM reliably from in situ turbidity (R2 = 0.93) with a mean normalized bias (MNB) of 2.4% for the Swedish and 14.0% for the Lithuanian datasets, and a relative error (RMS) of 25.3% and 37.3%, respectively. In the validation dataset, turbidity ranged from 0.3 to 49.8 FNU (Formazin Nephelometric Unit) and correspondingly, SPM concentration ranged from 0.3 to 34.0 g m–3 which covers the ranges typical for Baltic Sea waters. Next, the medium-resolution imaging spectrometer (MERIS) standard SPM product MERIS Ground Segment (MEGS) was tested on all available match-up data (n = 67). The correlation between SPM retrieved from MERIS and in situ SPM was strong for the Swedish dataset with r = 0.74 (RMS = 47.4 and MNB = 11.3%; n = 32) and very strong for the Lithuanian dataset with r = 0.94 (RMS = 29.5% and MNB = −1.5%; n = 35). Then, the turbidity was derived from the MERIS standard SPM product using the new in situ SPM model, but retrieving turbidity from SPM instead. The derived image was then compared to existing in situ data and showed to be in the right range of values for each sub-area. The new SPM model provides a robust and cost-efficient method to determine SPM from in situ turbidity measurements (or vice versa). The developed SPM model predicts SPM concentration with high quality despite the high coloured dissolved organic matter (CDOM) range in the Baltic Sea. By applying the developed SPM model to already existing remote sensing data (MERIS/Envisat) and most importantly to a new generation of satellite sensors (in particular OLCI on board the Sentinel-3), it is possible to derive turbidity for the Baltic Sea.
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  • 80
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    Can Sepia officinalis L. be reared on artificial food? (1991)
    Taylor & Francis
    In:  Marine Behaviour and Physiology, 19 (1). pp. 35-38.
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    Publikationsdatum: 2020-07-14
    Beschreibung: To evaluate the feasibility of feeding Sepia officinalis on artificial food, a food pellet consisting of Palaemon serratus powder and alginate as binding agent was developed and tested. Six of seven cuttlefish clearly ingested the artificial food during the ten days it was supplied.
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  • 81
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    Neritic squid resources and cuttlefish resources in Japan (1991)
    Taylor & Francis
    In:  Marine Behaviour and Physiology, 18 (3). pp. 149-226.
    Details
    Publikationsdatum: 2020-07-14
    Beschreibung: Knowledge concerning biology of two loliginids and three sepiids which are found in the Japanese waters was reviewed including unpublished information of the authors. The swordtip squid, Photololigo edulis, is one of the most important resources for the coastal fisheries of Kyushu and the prefectures facing the southwest Japan Sea. This species is the only species of genus Photololigo found along the Japanese mainland coast and is easily distinguished from other loliginids, by the light organs on the ink sac. The species is distributed from southern Japan to the Red Sea. The spawning season extends throughout the year. Egg cases are laid in clusters on the sandy bottom. The life span is about one year. In the juvenile stage they feed on Crustacea and after reaching pre‐maturity they prey mainly on fish, but many have empty stomachs. Most catches are made by jigging and trawler. The fishing season extends throughout the year. The fishing grounds are widely spread over the continental shelf. Annual catches are around 25 000 metric tonnes. Although this level varies from year to year, it is fairly stable. Fishing has probably little effect on the stocks. The spear squid, Heterololigo bleekeri, can be easily distinguished from other loliginids by its shorter tentacles. The species is endemic in the Far East waters. The stocks are larger in the north. The spawning season is winter in south Japan, and from spring to early summer in north Japan. Egg cases are laid beneath the undersurfaces of firm substances. The life span is about one year. Its feeding behaviour is similar to that of the swordtip squid. Catches are made mainly with bottom trawler and fixed nets from autumn to spring. Annual landings fluctuate widely from year to year. Several prefectures along the northern Japan Sea coast are promoting the large scale development of artificial spawning beds of the species to increase the stocks. The three sepiids, golden cuttlefish. Sepia esculenta, kisslip cuttlefish. Sepia lycidas, and spineless cuttlefish, Sepiella japonica are important in mainland Japan. Those three spawn from spring to early summer in the innermost waters of semi‐enclosed inlets. Eggs are laid in batches of 50–300 every day for 3–4 days followed by a rest period of 1–2 days. This pattern is repeated until several thousands of eggs have been laid. The life span of Sepia esculenta and Sepiella japonica is one year. They feed mainly on decapod crustaceans and fish but as growth proceeds the proportion of fish increases. They are fished mainly by cuttlefish trap and beam trawler. In the early 1960s annual landings were 20 000 metric tonnes but since 1980 catches have decreased below 10 000 metric tonnes. Of the three species, the stock of Sepiella japonica is the most fluctuable. Judging from the result of the stock assessment studies on Sepiella japonica in the western Inland Sea, their stocks have been over‐exploited.
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  • 82
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    Bladder wrack (Fucus vesiculosus) as a multi-isotope bio-monitor in an urbanized fjord of the western Baltic Sea (2017)
    Taylor & Francis
    In:  Isotopes in Environmental and Health Studies, 53 (6). pp. 563-579.
    Details
    Publikationsdatum: 2020-01-02
    Beschreibung: The spatial variations in the elemental and stable carbon, nitrogen, and sulphur isotope composition of bladder wrack (Fucus vesiculosus) growing along the shore line of the semi-enclosed urbanized Kiel Fjord (western Baltic Sea) was investigated at more than 60 sites. The analyses of the carbon-nitrogen-sulphur (CNS) stoichiometry and C and N stable isotope signature of F. vesiculosus displayed substantial differences between the north-western and the south-eastern parts of the Kiel Fjord. Different size classes displayed in part differences in C:N and C:S ratios, and the carbon isotope composition, reflecting the impact of the boundary conditions during growth. Whereas the sulphur isotope composition was controlled by the assimilation of seawater sulphate, the carbon isotope composition reflected the difference in the composition of surface waters. The δ15N values of the organic tissue tend to be an integrated monitor of anthropogenic impacts on the fjord. Results are compared to the composition of surface waters.
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  • 83
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    Breeding biology of Fluttering Shearwaters (Puffinus gavia) on Burgess Island in northern New Zealand (2018)
    Taylor & Francis
    In:  Emu - Austral Ornithology, 118 (2). pp. 173-182.
    Details
    Publikationsdatum: 2021-02-08
    Beschreibung: The fluttering shearwater (Puffinus gavia) is an abundant seabird endemic to breeding colonies in northern and central New Zealand. The species remains poorly studied, and here we present the first study to examine its breeding biology in detail. Fluttering shearwater nests were monitored daily from laying in September 2015 to fledging in January 2016 on Burgess Island (Mokohinau Islands group) in the outer Hauraki Gulf, northern New Zealand. Burrows were generally simple and non-branched. Eggs were laid over a period of 39 days with laying peaking 12th September. Incubation was 50 ± 3.7 days and chicks fledged after an average of 74 ± 4.3 days, from late December to the end of January. Chick development corresponds to the pattern observed for other Procellariiformes, gaining body mass rapidly to a maximum of 115% of adult mass, and then losing weight until fledging. Chicks were fed most nights throughout chick-rearing, indicating adult birds have access to a stable food supply close to the colony. Breeding success was 63.8% and similar to other Puffinus species. This study provides baseline biological data for a poorly studied, yet common, New Zealand endemics seabird. The obtained new information will allow for further ecological investigations and improved conservation management for the species
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  • 84
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    New C13lipids from the marine-derived fungusTrichoderma harzianum (2015)
    Taylor & Francis
    In:  Journal of Asian Natural Products Research, 17 (5). pp. 468-474.
    Details
    Publikationsdatum: 2017-10-04
    Beschreibung: Chemical examination of the fermentation broth of a sponge-associated fungus Trichoderma harzinum HMS-15-3 led to the isolation of four pairs of new C13 lipid enantiomers namely harzianumols A–H (1a–4b). Their structures were elucidated on the basis of extensive spectroscopic (IR, MS, 1D, and 2D NMR) data analysis, including the modified Mosher's method for the assignment of their absolute configurations. The new compounds were evaluated for antihyperlipidemic effects in HepG2 cells.
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  • 85
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    Analysis of shape variability and life history strategies of Illex argentinus in the northern extreme of species distribution as a tool to differentiate spawning groups (2017)
    Taylor & Francis
    In:  Journal of Natural History, 51 (43-44). pp. 2585-2605.
    Details
    Publikationsdatum: 2020-02-06
    Beschreibung: This study aimed to differentiate local and migratory spawning groups of the shortfin squid Illex argentinus caught in Brazilian waters using geometric and traditional morphometric methods and size-selective processes. The back-calculated length distributions reconstructed from daily growth increments deposited in the gladius allowed the identification of size-selective processes that may be related to different life history strategies. Landmark analysis on body shape (geometric morphometric) revealed that spawning groups presented significant ontogenetic variations in terms of body outline. In addition, traditional morphometric methods, based on multivariate analysis, associated juveniles of the expected migratory group (large size) and differentiated them from the local group individuals (small size). The changes in form, probably linked to the environmental gradients experienced by individuals throughout ontogeny, were interpreted as adaptations to improve swimming capacity. Migrant individuals have being differentiated from the smaller sizes group by body characteristics (broad fins, elongated and thicker mantle), which may increase the ability to perform long migrations.
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  • 86
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    Microbial Community Structure Associated with Biogeochemical Processes in the Sulfate–Methane Transition Zone (SMTZ) of Gas-hydrate-bearing Sediment of the Ulleung Basin, East Sea (2017)
    Taylor & Francis
    In:  Geomicrobiology Journal, 34 (3). pp. 207-219.
    Details
    Publikationsdatum: 2020-07-30
    Beschreibung: We investigated the biogeochemical constituents, microbial communities and functional genes (mcr and dsr) associated with anaerobic methane oxidation and sulfate reduction, and metabolic activities by sulfate reduction in the sulfate–methane transition zone (SMTZ) of gas-hydrate-bearing sediment of the Ulleung Basin in the East Sea. Maxima in the sulfate reduction rate (12.6 nmol cm¡3 d¡1), CO concentration (83 mM), and gene abundances of dsrA (9.1 £ 106 copies cm¡3) and mcrA (11.6 £ 106 copies cm¡3) occurred in the SMTZ. The peaks of CO consistently found in the SMTZ suggested that CO is an intermediate metabolic product related to methane oxidation. Candidate division JS1, the predominant bacterial group that comprised 59.0–63.7% of the 16S rRNA gene sequences, was recognized as an important organic carbon oxidizer. Both Marine Benthic Group D (MBGD) and Marine Benthic Group B (MBGB), which constituted 40.8–52.9 and 10.3–43.9% of the 16S rRNA gene sequences, respectively, were the dominant archaeal groups. Analysis of functional gene diversity revealed that anaerobic methanotroph-1-related phylotypes appeared to be the major CH4 oxidizer, whereas Firmicutes-like group was a predominant sulfate reducer in the 0.8 mbsf in SMTZ with low SO42¡ concentration. Overall results indicated that JS1 and two archaeal groups (MBGB and MBGD) seem to play a significant role in carbon and elements cycles in the gas-hydrate-bearing subsurface sediment of the Ulleung Basin.
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  • 87
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    The antibiotic pipeline: reviving research and development and speeding drugs to market (2017)
    Taylor & Francis
    In:  Expert Review of Anti-infective Therapy, 15 (5). pp. 425-433.
    Details
    Publikationsdatum: 2018-12-17
    Beschreibung: Introduction: The combination of growing antimicrobial resistance with a dry pipeline has resulted in infections that can no longer be treated. Specific reasons have led to companies’ exit from the antibacterial space, however recent incentives are spurring interest to reinvigorate the pipeline. Areas covered: This article summarizes the available information on the discovery, developmental, and regulatory challenges in antibacterial development that have led to disinterest in the space, as well as ongoing incentives such as public-private partnerships and streamlined pathways to mend these challenges and bring new antibiotics to patients in need. Expert commentary: Clinicians should not only understand the reasons for the decline in antibiotic development that have resulted in the dry pipeline, but also the ongoing initiatives in place to build an appropriate supply. Doing so will result in greater appreciation and prudent use of these life-saving drugs when they become available.
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  • 88
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    The sponge association of the abyssal Norwegian Greenland Sea: Species composition, substrate relationships and distribution (1993)
    Taylor & Francis
    In:  Sarsia, 78 (2). pp. 83-96.
    Details
    Publikationsdatum: 2018-03-05
    Beschreibung: During the ‘Meteor’ Expedition 13 in July and August 1990 to the northern part of the Norwegian Sea off west Spitsbergen, 7 stations with a depth of 2000 m or more were sampled with Agassiz trawl or hyperbenthos sledge, 14 more with a large box corer. Sponges were found at 6 of the trawl stations and in 2 box cores. A total of 19 species occurred, most of which were new to the area. Eight of the species were encountered more often than the other 11. Literature review and check of unpublished samples showed that by distribution, frequency of occurrence or abundance these species can be defined as the typical sponge association of the Norwegian and Greenland abyssal sea. This sponge association has a wide occurrence over the deep Norwegian-Greenland seas and parts of the Arctic basins. The analysis of substrate utilization of the 8 core species shows that all of them are able to colonize soft bottom, even some that previously had been considered to be dependent on hard substrate exclusively. Alternative substrate utilization and, in some species, the adoption of an infaunallife style are judged to be major reasons for the success of these species in the deep sea. The infaunal life style of the species Thenea abyssorum, Trichostemma sol and Tentorium semisuberites is documented and population structure data are given for the first time.
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  • 89
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    Patch Structure in a Tropical Rocky Shore Community in Brazil: A Mosaic of Successional States? (1992)
    Taylor & Francis
    In:  Ophelia, 35 (3). pp. 187-195.
    Details
    Publikationsdatum: 2018-03-07
    Beschreibung: The community of benthic organisms in the lower zone of a rocky shore at Praia Rasa, Brazil is distinctly patchy in structure. We examined the hypothesis that two types of patch (a. red algal turf and b. colonial coelenterate) represent different temporal stages in the same successional trajectory. We made observations on a) the stability of patch boundaries, b) successional sequence in experimental clearings within both patch types and c) species composition through time in undisturbed patches. In most cases, the coelenterate overgrew the algae at the patch boundaries, thus showing a competitive asymmetry. In the successional sequence, diatoms were followed by ulvoid species. Thereafter, within clearings in the algal patches, a red algal turf was once more established over one year. In contrast, the mid successional period in clearings within the coelenterate patch was characterized by very low cover of sessile organisms. Colonization by red algal turfs and by the coelenterate colony is largely dependent on vegetative spread. Thus later succession is not predictable on the basis of time alone. Supply-side processes are clearly of equal importance. Therefore it cannot be stated without qualification that patches of red algal turfs and colonial coelenterate at Praia Rasa are part of the same successional sequence.
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  • 90
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    Modelling ocean temperatures and mixed‐layer depths in the Tasman sea off the South Island, New Zealand (1992)
    Taylor & Francis
    In:  New Zealand Journal of Marine and Freshwater Research, 26 (1). pp. 37-51.
    Details
    Publikationsdatum: 2018-03-21
    Beschreibung: A vertical mixing model was applied to a location off the west coast of the South Island, New Zealand, with the aim of simulating the seasonal cycle of temperature and mixed layer depth in the region. Observed weather data for 1973–89 were used to drive the model. Model results for sea temperature and mixed layer depth were compared to measurements from ships, moored temperature sensors, and satellites. The main features of the variations in temperature and mixed layer depth can be explained by the local meteorological forcing and vertical mixing, together with a general southward flow in the study area. Superimposed are short‐term variations which are obviously related to variable currents and the associated horizontal heat transport.
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  • 91
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    New observations on the biology ofSiboglinum poseidoniFlügel & Langhof (Pogonophora) from the Skagerrak (1992)
    Taylor & Francis
    In:  Sarsia, 77 (3-4). pp. 287-290.
    Details
    Publikationsdatum: 2018-03-20
    Beschreibung: Specimens of Siboglinum poseidon were collected by box coring and studied together with their undisturbed habitat. Occupied tubes occur in depse aggregations beneath the sediment surface directly at methane seep sites. Fertilized eggs develop into small larvae within the anterior transparent region of the tube. The oldest larvae observed in tubes measure c. 370 µm in length. It is concluded that released larvae develop in the sediment in the oxygenated top layer. Three tube types have been found: 1, the larval envelope; 2, the juvenile, transparent tube and 3, the ringed, adult tube. The smallest specimens recovered from the sediment measure c. 2 mm. They are complete with a tentacle, pyriform glands, bacteriocytes and juvenile opisthosoma. Some larvae were reared under laboratory conditions for 10 weeks. At that stage red blood becomes visible and a small tentacular bud is formed dorsally.
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  • 92
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    High Resolution PCB Analysis of Kanechlor, Phenoclor and Sovol Mixtures Using Multidimensional Gas Chromatography (1992)
    Taylor & Francis
    In:  International Journal of Environmental Analytical Chemistry, 47 (3). pp. 201-215.
    Details
    Publikationsdatum: 2018-03-21
    Beschreibung: Kanechlor-300, -400, -500 and -600, Phenoclor DP-3, -4, -5 and -6 and Sovol mixtures were analyzed for their chlorobiphenyl (CB) composition using high-resolution one-dimensional and multidimensional gas chromatography-electron capture detection (MDGC-ECD) techniques. The congener patterns of tested Kanechlor and Phenoclor mixtures resembled Aroclor 1016, 1242, 1254 and 1260. However, differences in the percentage contribution of minor constituents were noticed among these mixtures, which could be due to variations in the boiling-point fractionation of these commercial products. CB pattern of Sovol was different from the rest of the mixtures tested. It showed a composition in between ca. 30%, 40%, 50% and 60% overall chlorine levels. MDGC-ECD study showed the presence of hitherto unnoticed non-CB compounds coeluting with CBs in some commercial PCBs. The use of these mixtures as quantitation standards should be considered with caution. CB patterns of Sovol and a water extract of the Gulf of Finland matched closely, indicating a point source contamination to these waters.
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  • 93
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    Small-scale surface streaming under natural conditions as effective in air-sea gas exchange (1992)
    Taylor & Francis
    In:  Tellus B: Chemical and physical meteorology, 44 (2). pp. 150-159.
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    Publikationsdatum: 2018-03-21
    Beschreibung: A series of field experiments has been made to determine the occurrence of small-scale surface motions that might enhance gas exchange by surface renewal. Out of 93 runs under natural conditions on open bodies of water, only 19 gave no indication of surface streaming within a few seconds. The data cover the wind speed range up to about 6 ms-1. Above 2 or 3 ms-1, predominately line structures were observed. This points to an important r6le of surface renewal in gas exchange.
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  • 94
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    Conversion among North Atlantic surface water types (1993)
    Taylor & Francis
    In:  Tellus A: Dynamic meteorology and oceanography, 45 (1). pp. 72-79.
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    Publikationsdatum: 2018-03-22
    Beschreibung: Climatological data sets are used to estimate the amount of water changing temperature and salinity at the sea-surface owing to air-sea exchanges. Considering this conversion as a function of sea-surface temperature and salinity leads to the definition of a conversion vector, which represents mass sources and sinks for each water type. The vector representation shows graphically the way the shape of the temperature-salinity relation is driven at the surface by the air-sea heat and fresh water fluxes.
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  • 95
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    Parasitic copepods of marine fish cultured in Japan: a review (2015)
    Taylor & Francis
    In:  Journal of Natural History, 49 (45-48). pp. 2891-2903.
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    Publikationsdatum: 2016-02-23
    Beschreibung: This paper reviews aspects of the biology of copepods infecting marine fish commercially cultured at fish farms or held as broodstock at governmental hatcheries in Japan. In total, 20 species of parasitic copepods have been reported from these fish: they are mostly caligids (12 spp.), followed by lernaeopodids (4 spp.), pennellid (1 sp.), chondracanthid (1 sp.), taeniacanthid (1 sp.), and unidentified species (1 sp.). The identified copepods are: Caligus fugu, C. lagocephalus, C. lalandei, C. latigenitalis, C. longipedis, C. macarovi, C. orientalis, C. sclerotinosus, C. spinosus, Lepeophtheirus longiventralis, L. paralichthydis, L. salmonis (Caligidae); Alella macrotrachelus, Clavella parva, Parabrachiella hugu, P. seriolae (Lernaeopodidae); Peniculus minuticaudae (Pennellidae); Acanthochondria priacanthi (Chondracanthidae); and Biacanthus pleuronichthydis (Taeniacanthidae). The fish recorded as hosts include carangids (4 spp.), sparids (2 spp.), monacanthids (2 spp.), salmonids (2 spp.), scombrid (1 sp.), tetraodontid (1 sp.), pleuronectid (1 sp.), paralichthyid (1 sp.), and trichodontid (1 sp.). Only five species (C. orientalis, L. longiventralis, L. salmonis, C. parva and A. priacanthi) parasitize farmed fish in subarctic waters, while all other species (15 spp.) infect farmed fish in temperate waters. No information is yet available on copepods from fish farmed in subtropical waters. Three species of Caligus (C. fugu, C. sclerotinosus and C. longipedis) are serious pests in aquaculture of Japanese pufferfish (Takifugu rubripes), red seabream (Pagrus major), and striped jaw (Pseudocaranx dentex), respectively. Due to its one-host life cycle that is unique among pennellids, P. minuticaudae is considered as a potentially serious pest with further development of aquaculture of its filefish hosts, threadsail filefish (Stephanolepis cirrhifer) and black scraper (Thamnaconus modestus). Infection of farmed salmonids by L. salmonis is not a serious problem in Japan
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  • 96
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    A spike of CO2 in the atmosphere at glacial-interglacial boundaries induced by rapid deposition of manganese in the oceans (1991)
    Taylor & Francis
    In:  Tellus B: Chemical and physical meteorology, 43 (2). pp. 97-105.
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    Publikationsdatum: 2017-01-16
    Beschreibung: The model presented here provides an explanation of the rapid response of atmospheric CO2 to increasing solar insolation. In the glacial ocean, during periods of slow, deep water renewal, when less oxygen is supplied to the deep ocean and into sediments, manganese oxide in the sediments is reduced and forms soluble MnCO3 and stays in the water column. The dissolved Mn-carbonate should then reach a concentration of ≥ 10µMol/liter, approximately 5,000 to 104 times larger than it is at present. This is the mode prevailing until deep water formation at high latitudes starts again. As soon as the balance between oxygen and organic matter becomes oxidizing once more, the deposition of MnO2 recommences. Oxidation of dissolved Mn2+CO3 to Mn4+O2 which is a spike of acidity to the ocean, rapidly lowers the CO3−− concentration in the water column and enhances release of CO2 to the atmosphere, producing the observed events of CO2 increase at the transitions from glacials to interglacials. The surprising conclusion is that the oceanic (redox-) cycle of a minor element may have had a major impact on Earth's climate.
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  • 97
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    Hydrothermal mineralization from the Valu Fa Ridge, Lau back-arc basin (SW Pacific) (1990)
    Taylor & Francis
    In:  Marine Mining, 9 . pp. 271-301.
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    Publikationsdatum: 2018-09-18
    Beschreibung: Grab samples collected in 1987 from the Valu Fa back-arc ridge in the SW Pacific include sulfide-bearing basaltic andesites and andesitic xenoliths, massive sulfide-barite-silica mineralization, native sulfur, and a large number of Fe-Mn crusts. Sphalerite, pyrite, marcasite, barite, and amorphous silica are the predominant minerals in the massive samples. Smaller amounts of chalcopyrite, galena, tennantite, and covellite have been identified. This assemblage formed at the seafloor from smoker-type hydrothermal fluids with temperatures 〈300°C and high concentrations of reduced sulfur. Sulfide mineralization in basaltic andesites consists of disseminated pyrite and marcasite. The scarity of pyrrhotite suggests precipitation of sulfides under elevated fS2-fO2 conditions and at temperatures that may have been as low as 150°C. Extensive deposits of Fe- or Mn-dominated hydrothermal crusts at the Valu Fa Ridge have formed at considerably lower temperatures (≤20°C). High-temperature hydrothermal products including intergrowths of Cu-Fe-Zn-S intermediate solid solution and pyrrhotite were found in a mineralized xenolith from a subvolcanic level.
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  • 98
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    Validation of SMOS sea ice thickness retrieval in the northern Baltic Sea (2015)
    Taylor & Francis
    In:  Tellus A: Dynamic meteorology and oceanography, 67 . p. 24617.
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    Publikationsdatum: 2015-08-03
    Beschreibung: The Soil Moisture and Ocean Salinity (SMOS) mission observes brightness temperatures at a low microwave frequency of 1.4 GHz (L-band) with a daily coverage of the polar regions. L-band radiometry has been shown to provide information on the thickness of thin sea ice. Here, we apply a new emission model that has previously been used to investigate the impact of snow on thick Arctic sea ice. The model has not yet been used to retrieve ice thickness. In contrast to previous SMOS ice thickness retrievals, the new model allows us to include a snow layer in the brightness temperature simulations. Using ice thickness estimations from satellite thermal imagery, we simulate brightness temperatures during the ice growth season 2011 in the northern Baltic Sea. In both the simulations and the SMOS observations, brightness temperatures increase by more than 20 K, most likely due to an increase of ice thickness. Only if we include the snow in the model, the absolute values of the simulations and the observations agree well (mean deviations below 3.5 K). In a second comparison, we use high-resolution measurements of total ice thickness (sum of ice and snow thickness) from an electromagnetic (EM) sounding system to simulate brightness temperatures for 12 circular areas. While the SMOS observations and the simulations that use the EM modal ice thickness are highly correlated (r2=0.95), the simulated brightness temperatures are on average 12 K higher than observed by SMOS. This would correspond to an 8-cm overestimation of the modal ice thickness by the SMOS retrieval. In contrast, if the simulations take into account the shape of the EM ice thickness distributions (r2=0.87), the mean deviation between simulated and observed brightness temperatures is below 0.1 K.
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  • 99
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    Explicit Planktic Calcifiers in the University of Victoria Earth System Climate Model, Version 2.9 (2015)
    Taylor & Francis
    In:  Atmosphere-Ocean, 53 (3). pp. 332-350.
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    Publikationsdatum: 2019-08-19
    Beschreibung: Marine calcifiers as a plankton functional type (PFT) are a crucial part of the global carbon cycle, being responsible for much of the carbon export to the deep ocean entering via biological pathways. Deep ocean carbon export through calcifiers is controlled by physiological, ecological, and biogeochemical factors. This paper describes the implementation of a calcifying phytoplankton PFT in the University of Victoria Earth System Climate Model, version 2.9 (UVic ESCM), and mechanistic improvements to the representation of model carbon export (a full calcite tracer, carbonate chemistry dependent calcite dissolution rates, and a ballasting scheme). An iterative method for stabilizing and tuning the biogeochemistry is furthermore described. The UVic ESCM now fills a niche in Earth system modelling that was previously unoccupied in that it is relatively inexpensive to run, yet resolves the complete Earth system carbon cycle including prognostic calcium carbonate and a separate phytoplankton calcifier PFT. The model is now well suited to testing feedbacks between the carbonate and carbon cycles and the climate system as transient simulations. The modifications described improve the UVic ESCM's mechanistic realism without compromising performance with respect to observed carbon and nutrient fluxes. Primary production, export production, particulate organic carbon, and calcite fluxes all fall within independently observed estimates.
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    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OCEANREP)
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    Development of an interactive identification key for Oncaeidae (Copepoda: Cyclopoida) (2015)
    Taylor & Francis
    In:  Journal of Natural History, 49 (45-48). pp. 2727-2741.
    Details
    Publikationsdatum: 2017-04-11
    Beschreibung: The current state of development of an interactive electronic identification key for females of the marine pelagic microcopepod family Oncaeidae is presented. To date, 112 species have been described, allocated to seven genera (Archioncaea, Conaea, Epicalymma, Monothula, Oncaea s.str., Spinoncaea, and Triconia) and 16 species groups within the speciose paraphyletic taxon Oncaea s.l. Only two species of Oncaea s.l. show an uncertain group status. Of all described oncaeids, seven species are not yet included in the key due to inadequacies in morphological description and/or lack of type material for re-examination. In addition, seven morphologically distinct species and two new species groups are considered that have not yet been formally described. The key uses easily distinguishable morphological characters as far as possible (e.g. body size, proportional lengths of urosomites, length of P5 exopod) and includes more difficult characters (e.g. spine counts on swimming legs, proportional spine lengths) where required for unequivocal identification. The characters used in the key allow the identification of genera and species groups by investigators with limited taxonomic experience; species separation in most cases requires some advanced dissection skills. Potential identification problems caused by difficulties discerning minute morphological features or intraspecific morphometric variability are discussed. The present version of the identification key still requires complementary illustrations of character states and inclusion of fact sheets summarizing the characteristics of each species with notes on taxonomic uncertainties and links to databases providing zoogeographical and genetic information.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OCEANREP)
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