Hybridization between the Mallard and native dabbling ducks: causes, consequences and management.

2014 ◽  
Vol 20 (1) ◽  
pp. 41 ◽  
Author(s):  
P-J Guay ◽  
A Taysom ◽  
R Robinson ◽  
J P Tracey
Keyword(s):  
Introduced Species ◽  
Anas Platyrhynchos ◽  
Management Strategies ◽  
Dabbling Ducks ◽  
Monitoring Techniques ◽  
Duck Species ◽  
Black Duck ◽  
Dabbling Duck ◽  
The Pacific ◽  
The World

Waterbirds are currently facing various threats throughout the world. One threat that is often overlooked is hybridization with introduced species. This threatening process is especially significant for dabbling ducks (Genus Anas). The Mallard (Anas platyrhynchos) has been introduced to various parts of the world and now hybridizes and threatens numerous Anas species. In this paper, we review hybridization between Mallards and dabbling ducks with a specific emphasis on threats to the Pacific Black Duck (A. superciliosa). We then present an overview of the potential mechanisms of hybridization and discuss monitoring techniques. We conclude by proposing management strategies and speculating on the future of native dabbling duck species.

Morphologie bucco-linguale d'une guilde de canards barboteurs

1986 ◽  
Vol 64 (10) ◽  
pp. 2176-2180 ◽  
Author(s):  
Serge Tremblay ◽  
Richard Couture
Keyword(s):  
Resource Partitioning ◽  
Anas Platyrhynchos ◽  
Morphological Characters ◽  
Food Resources ◽  
Average Weight ◽  
Dabbling Ducks ◽  
Interspecific Differences ◽  
Interspecific Variations ◽  
Duck Species ◽  
Black Duck

Interspecific variations of bucco-lingual characteristics were measured in a guild of dabbling ducks and the influence of these characteristics on the use of food resources was studied. Morphological characters of the bill and tongue were measured in eight species of dabbling ducks of the genus Anas. Our results show that there are interspecific differences in the bucco-lingual characteristics of all species studied except for the Black Duck (Anas rubripes) and the Mallard (Anas platyrhynchos). There was a significant correlation between the density of bill lamellae and the weight of the species (r = −0.935, P < 0.01). In six species, the density of the lamellae was correlated with the volumetric index of the bill (r = −0.960, P < 0.01). These results indicate that in species with large bills the density of the lamellae is low, whereas in species with small bills, the number of lamellae is high. The volumetric index of the bill was significantly related to the average weight of each duck species (r = −0.905, P < 0.01). Dabbling ducks that filter benthic material can thus be classified on a scale based on lamellar density and bill volume. The differences in bucco-lingual morphlogical characters seem to reflect a mode of resource partitioning that diminishes competition.[Journal translation]

scholarly journals The Introduction of the Asian Red Algae Melanothamnus japonicus (Harvey) Díaz-Tapia & Maggs in Peru as a Means to Adopt Management Strategies to Reduce Invasive Non-Indigenous Species

Diversity ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 176
Author(s):  
Julissa J. Sánchez-Velásquez ◽  
Lorenzo E. Reyes-Flores ◽  
Carmen Yzásiga-Barrera ◽  
Eliana Zelada-Mázmela
Keyword(s):  
South America ◽  
Introduced Species ◽  
Native Species ◽  
Pacific Coast ◽  
Large Subunit ◽  
Management Strategies ◽  
Indigenous Species ◽  
Bisphosphate Carboxylase ◽  
The Pacific ◽  
Non Indigenous Species

Early detection of non-indigenous species is crucial to reduce, mitigate, and manage their impacts on the ecosystems into which they were introduced. However, assessment frameworks for identifying introduced species on the Pacific Coast of South America are scarce and even non-existent for certain countries. In order to identify species’ boundaries and to determine the presence of non-native species, through morphological examinations and the analysis of the plastid ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit (rbcL-5P) gene, we investigated the phylogenetic relationships among species of the class Florideophyceae from the coast of Ancash, Peru. The rbcL-5P dataset revealed 10 Florideophyceae species distributed in the following four orders: Gigartinales, Ceramiales, Halymeniales, and Corallinales, among which the Asian species, Melanothamnus japonicus (Harvey) Díaz-Tapia & Maggs was identified. M. japonicus showed a pairwise divergence of 0% with sequences of M. japonicus from South Korea, the USA, and Italy, the latter two being countries where M. japonicus has been reported as introduced species. Our data indicate a recent introduction event of M. japonicus in Peru, and consequently, the extension of its distribution into South America. These findings could help to adopt management strategies for reducing the spread and impact of M. japonicus on the Pacific Coast of South America.

WTO SUCCESSOR TO GATT

1997 ◽  
Vol 14 (2) ◽  
pp. 172-187
Author(s):  
Arif Sultan
Keyword(s):  
North Africa ◽  
European Economic Community ◽  
Developed Countries ◽  
Economic Community ◽  
Land Area ◽  
The North ◽  
Muslim Countries ◽  
The Pacific ◽  
The World ◽  
The Developed Countries

Within a short span of time a number of economic blocs have emergedon the world horizon. In this race, all countriedeveloped, developingand underdeveloped-are included. Members of the North America FreeTrade Agreement (NAITA) and the European Economic Community(EEC) are primarily of the developed countries, while the EconomicCooperation Organization (ECO) and the Association of South EastAsian Nations (ASEAN) are of the developing and underdevelopedAsian countries.The developed countries are scrambling to create hegemonies throughthe General Agreement on Tariff and Trade (GATT). In these circumstances,economic cooperation among Muslim countries should be onthe top of their agenda.Muslim countries today constitute about one-third of the membershipof the United Nations. There are around 56 independentMuslim states with a population of around 800 million coveringabout 20 percent of the land area of the world. Stretchingbetween Atlantic and the Pacific Oceans, the Muslim Worldstraddles from North Africa to Indonesia, in two major Islamicblocs, they are concentrated in the heart of Africa to Indonesia,in two major blocs, they are concentrated in the heart of Africaand Asia and a smaller group in South and Southeast Asia.'GATT is a multilateral agreement on tariffs and trade establishing thecode of rules, regulations, and modalities regulating and operating internationaltrade. It also serves as a forum for discussions and negotiations ...

Re-visioning obscure spaces

Thesis Eleven ◽  
2018 ◽  
Vol 145 (1) ◽  
pp. 77-98 ◽  
Author(s):  
Jose Jowel Canuday
Keyword(s):  
Social Spaces ◽  
Distinctive Features ◽  
Contemporary World ◽  
The Pacific ◽  
The Social ◽  
The World ◽  
The Future

In popular imagery, the littorals of Sulu and Zamboanga conjure visions of pirates, terrorists, and bandits marauding its rough seas, open shores, and rugged mountains. These bleak accounts render the region nothing but a violent and peripheral southern Philippine backdoor inconspicuous to the sophisticated constituencies of the world’s metropolitan centres. Obscured from these imageries are the lasting cosmopolitan traits of openness, flexibility, and reception of local folk to trans-local cultural streams that marked Sulu and Zamboanga as a globalised space across the ages and oceans. The distinctive features of these cosmopolitan sensibilities are strikingly discernible in inter-generationally shared narratives, artefacts, and performances that were continually renewed from the days when Sulu and Zamboanga served as a borderless trading and cultural enclave nestled at the crossroads of the Pacific and the Indian Oceans. These enduring cosmopolitan sensibilities are embodied in the blending, among others, of the time-honoured dance of pangalay and the pop-musical dance genre celebrated on actual, analogue, and digitally-mediated spaces of the contemporary world. Furthermore, these embodied sensibilities are evident in song compositions that proclaim the humanistic themes of hope, peace, and prosperity to their place and the world in ways that exemplify the local people’s broader sense of connections beyond the narrow association of family, community, ethnicity, religion, and identity. This mixed bag of age-old and recent imaginaries and cultural traffic evoke a sociality that link the social spaces of the troubled but once and current globalised region to continuing acts of transcendence in history, memory, and visions of the future. In these marginalized places, we can see an unyielding tradition of cultural re-adaptation and creativity made up of myriad everyday acts that are down-to-earth, pragmatic, interstitial, and practical cosmopolitanism.

Vietnam in the Indo-Pacific Region: Perception, Position and Perspectives

2021 ◽  
pp. 097492842110050
Author(s):  
Nguyen Le Thy Thuong ◽  
Nguyen Thi Oanh
Keyword(s):  
Swot Analysis ◽  
Geographic Area ◽  
Common Interest ◽  
Pacific Region ◽  
Analysis Model ◽  
Common Space ◽  
The Pacific ◽  
The World ◽  
State Behaviour ◽  
Asian Pacific

The Indo-Pacific region is an area adjacent to some oceans and the gateway that connects the great power and small countries to the world; this region is always considered by Vietnam as a key strategic geographic area, having direct impacts on national security, position and its role in this region. While big powers have different perceptions to the Indo-Pacific region, as a country occupying an important geographic position in the Pacific region, Vietnam shares a common vision of an open and rule-based area, and a common interest in maintaining peace, stability and prosperity as well as building a common space for coexistence and development with the belief that the Indo-Asian-Pacific is large enough for every nation to grow and prosper. This article finds out that recent changes in the Indo-Pacific region in geopolitics, economics, security and national defence have made many countries, including Vietnam, to redefine their global and regional policies to refresh their strategic perceptions. Vietnam has its own perception, position, approach and national orientations, which is shaping its state behaviour and perspectives in this geopolitical vibrant Indo-Pacific region. Besides, this article uses the SWOT analysis model to determine the challenges, strengths and weaknesses of Vietnam in the Indo-Pacific region. Moreover, while the future of the Indo-Pacific in a post-COVID-19 pandemic world remains filled with uncertainty and economic challenges, the crisis also presents an opportunity for Vietnam to re-evaluate its position. Today, Vietnam always maintains its foreign policy of independence, self-reliance, multilateralism and diversification of international relations, which attaches great importance to enhancing multi-faceted cooperation with countries in the Indo-Pacific region. Thus, with its own perception and geostrategic advantage, Vietnam—a developing country in the region and in the world with relatively stable economic growth, pursuing rules and order will be a positive factor for a stable, peaceful and prosperous development in the region.

The Edinburgh Companion to Virginia Woolf and Contemporary Global Literature

2020 ◽  
Keyword(s):  
Virginia Woolf ◽  
Pacific Islands ◽  
The United States ◽  
Global Studies ◽  
East Europe ◽  
The Pacific ◽  
The World ◽  
North And South America ◽  
Multiple Languages ◽  
North And South

This book considers the global responses Woolf’s work has inspired and her worldwide impact. The 23 chapters address the ways Woolf is received by writers, publishers, academics, reading audiences, and students in countries around the world; how she is translated into multiple languages; and how her life is transformed into global contemporary biofiction. The 24 authors hail from regions around the world: West and East Europe, the Middle East/North Africa, North and South America, East Asia and the Pacific Islands. They write about Woolf’s reception in Ireland, France, Italy, Germany, Poland, Estonia, Russia, Egypt, Kenya, Mexico, Argentina, Uruguay, Brazil, the United States, China, Japan and Australia. The Edinburgh Companion is dialogic and comparative, incorporating both transnational and local tendencies insofar as they epitomise Woolf’s global reception and legacy. It contests the ‘centre’ and ‘periphery’ binary, offering new models for Woolf global studies and promoting cross-cultural understandings.

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