scholarly journals Population trends and priority conservation sites for Mexican Duck Anas diazi

2001 ◽  
Vol 12 (1) ◽  
pp. 35-52 ◽  
Author(s):  
A. Perez-Arteaga ◽  
K. J. Gaston ◽  
M. Kershaw
Keyword(s):  
Ramsar Convention ◽  
Management Actions ◽  
Large Fluctuations ◽  
International Importance ◽  
Current Minimum ◽  
Central Highlands ◽  
Key Sites ◽  
Long Term Trend ◽  
Northern Highlands

Little is known about Mexican Duck Anas diazi biology and populations. We analyse long-term (1960–2000) trends of Mexican Duck numbers in Mexico and employ contemporary count data (1991–2000) from the U.S. Fish and Wildlife Service midwinter surveys to identify key sites for conservation using a complementarity approach. The overall Mexican Duck population showed a significant long-term increase of 2.5% per year, with large fluctuations throughout the study period. The Northern highlands population increased at an annual rate of 7.7%, while the Central highlands population showed no significant long-term trend. During the last decade, counts in both the Northern and Central highlands exhibited no significant change. At the site level, significant long-term increases occurred in four localities in the Northern highlands (Laguna Bab�cora +13.9% annually, Laguna Bustillos +25.9%, Laguna Mexicanos +20.4% and Laguna Santiaguillo +16.9%) and in three localities in the Central highlands (Languillo +15.3% annually, Presa Solís +8.9%, Zacapu +13.4%). Two sites in the Central highlands showed significant declines, in the long term (Lago de Chapala, -5.2% per year) and during the last decade (Lerma, -11.8% per year). The Northern highlands held 16% and the Central highlands 84% of the Mexican Duck population in the period 1960–2000; during the last decade, these figures were 31% and 69%, respectively. A set of priority sites for conservation of the Mexican Duck was identified, consisting of 15 sites holding more than 70% of the midwinter Mexican Duck counts in Mexico. Ten sites from the priority set also qualify for designation as wetlands of international importance under the Ramsar Convention on Wetlands, by holding ≥ 1% of the estimated population. Four of the priority sites are in the Northern highlands and 11 in the Central highlands, of which eight are distributed along the Rio Lerma drainage. The most urgent actions that need to be undertaken are to estimate the current minimum population size in Mexico; to establish a programme for monitoring populations in the priority sites, especially those located within the highly degraded Rio Lerma drainage; and to determine the most feasible management actions for the species, concentrating efforts around the priority sites.

Discovery of an important wintering site of the Critically Endangered Spoon-billed Sandpiper Calidris pygmaea in the Meghna Estuary, Bangladesh

2017 ◽  
Vol 28 (2) ◽  
pp. 251-262
Author(s):  
SAYAM U. CHOWDHURY ◽  
MOHAMMAD FOYSAL ◽  
M ABDULLAH ABU DIYAN ◽  
SAKIB AHMED
Keyword(s):  
Species Distribution Models ◽  
Regression Testing ◽  
Critically Endangered ◽  
Ramsar Convention ◽  
Distribution Models ◽  
Migratory Shorebirds ◽  
International Importance ◽  
First Time ◽  
Global Population

SummaryThe Critically Endangered Spoon-billed Sandpiper Calidris pygmaeus is one of the most threatened migratory shorebirds in the world, breeding in Russia and wintering in Asia. The global population is declining rapidly and is projected to be extinct within a few decades without intervention. Here, we present the results of shorebird surveys in previously unrecognised site in Bangladesh along the Meghna Estuary, identified for the first time by using species distribution models. Counts and habitat preference of Spoon-billed Sandpipers and other endangered shorebirds are described here with notes on the global importance of the newly discovered site. The sum of the peak counts for each shorebird species across the two surveys was 25,993 including a minimum of 48 Spoon-billed Sandpipers. The majority of the Spoon-billed Sandpipers were observed during low tide while foraging (66.6%) and logistic regression testing for effects on the presence of foraging Spoon-billed Sandpiper indicate that they mainly preferred to forage on shallow mud. We summarise the threats to Spoon-billed Sandpipers and other birds in the new site that is currently not recognized as a Wetland of International Importance under the Ramsar Convention, although it fulfils several Ramsar Criteria. We also propose conservation and monitoring measures for long-term protection of the Spoon-billed Sandpiper and its habitat.

scholarly journals Important Bird and Biodiversity Areas (IBAs): their impact on conservation policy, advocacy and action

2018 ◽  
Vol 29 (2) ◽  
pp. 199-215 ◽  
Author(s):  
ZOLTAN WALICZKY ◽  
LINCOLN D. C. FISHPOOL ◽  
STUART H. M. BUTCHART ◽  
DAVID THOMAS ◽  
MELANIE F. HEATH ◽  
...  
Keyword(s):  
International Finance ◽  
Biological Diversity ◽  
Convention On Biological Diversity ◽  
Local Conservation ◽  
Ramsar Convention ◽  
Management Actions ◽  
Civil Society Organisations ◽  
Birds Directive ◽  
International Importance ◽  
Marine Realm

SummaryBirdLife International´s Important Bird and Biodiversity Areas (IBA) Programme has identified, documented and mapped over 13,000 sites of international importance for birds. IBAs have been influential with governments, multilateral agreements, businesses and others in: (1) informing governments’ efforts to expand protected area networks (in particular to meet their commitments through the Convention on Biological Diversity); (2) supporting the identification of Ecologically or Biologically Significant Areas (EBSAs) in the marine realm, (3) identifying Wetlands of International Importance under the Ramsar Convention; (4) identifying sites of importance for species under the Convention on Migratory Species and its sister agreements; (5) identifying Special Protected Areas under the EU Birds Directive; (6) applying the environmental safeguards of international finance institutions such as the International Finance Corporation; (7) supporting the private sector to manage environmental risk in its operations; and (8) helping donor organisations like the Critical Ecosystems Partnership Fund (CEPF) to prioritise investment in site-based conservation. The identification of IBAs (and IBAs in Danger: the most threatened of these) has also triggered conservation and management actions at site level, most notably by civil society organisations and local conservation groups. IBA data have therefore been widely used by stakeholders at different levels to help conserve a network of sites essential to maintaining the populations and habitats of birds as well as other biodiversity. The experience of IBA identification and conservation is shaping the design and implementation of the recently launched Key Biodiversity Areas (KBA) Partnership and programme, as IBAs form a core part of the KBA network.

NAEP Trends: Main NAEP vs. Long-Term Trend

2010 ◽  
Author(s):  
Albert E. Beaton ◽  
James R. Chromy
Keyword(s):  
Term Trend ◽  
Long Term Trend

Gran Paradiso: Erkenntnisse aus der sich natürlich regulierenden Steinbockpopulation|Gran Paradiso: Conclusions from the naturally regulated Capricorn population

2007 ◽  
Vol 158 (11) ◽  
pp. 349-352
Author(s):  
Grégory Amos ◽  
Ambroise Marchand ◽  
Anja Schneiter ◽  
Annina Sorg
Keyword(s):  
Nineteenth Century ◽  
Population Density ◽  
National Park ◽  
Optimal Management ◽  
Capra Ibex ◽  
Large Fluctuations ◽  
The Alps ◽  
Gran Paradiso ◽  
Gran Paradiso National Park

The last Capricorns (Capra ibex ibex) in the Alps survived during the nineteenth century in the Aosta valley thanks to the royal hunting reservation (today Gran Paradiso national park). Capricorns from this reservation were successfully re-introduced in Switzerland after its Capricorn population had disappeared. Currently in Switzerland there are 13200 Capricorns. Every year 1000 are hunted in order to prevent a large variation and overaging of their population and the damage of pasture. In contrast, in the Gran Paradiso national park the game population regulates itself naturally for over eighty years. There are large fluctuations in the Capricorn population (2600–5000) which are most likely due to the climate, amount of snow, population density and to the interactions of these factors. The long-term surveys in the Gran Paradiso national park and the investigations of the capacity of this area are a valuable example for the optimal management of the ibexes in Switzerland.

Institutionalizing the Liberal Creed

2017 ◽  
Author(s):  
Ronen Mandelkern
Keyword(s):  
Political Influence ◽  
Institutional Entrepreneurship ◽  
Political Decision ◽  
Economic Liberalism ◽  
Market Economic ◽  
Ministry Of Finance ◽  
Political Entrepreneurs ◽  
Long Term Trend ◽  
Political Decision Making

This chapter analyzes the role Israeli economists have played as purveyors of pro-market economic ideas and political entrepreneurs of economic liberalization in Israel. Israeli economists were strongly committed to economic liberalism already in the 1950s, but they were lacking decisive political influence. Two mechanisms increased their power over policy. First, long-term institutional changes gradually eroded “political” decision-making mechanism and opened the way to greater involvement of professional economists. This long-term trend was joined and reinforced by economists’ institutional entrepreneurship at the height of the 1980s economic crisis, when they initiated changes of macroeconomic governance. These changes enhanced the political power of the Ministry of Finance and the Bank of Israel and supported the institutionalization of neoliberalism in Israel.

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