scholarly journals Changes in Diurnal Cliff-Nesting Raptor Occurrence on the Ungalik River in Western Alaska: 1977, 1979, and 2008

ARCTIC ◽  
2016 ◽  
Vol 69 (3) ◽  
pp. 225
Author(s):  
Tim Craig ◽  
Erica H. Craig
Keyword(s):  
Natural Variation ◽  
Small Population ◽  
Peregrine Falcon ◽  
The Past ◽  
Peregrine Falcons ◽  
Nesting Sites ◽  
Occupied Territories ◽  
Buteo Lagopus ◽  
Global Population ◽  
Nesting Season

Diurnal cliff-nesting raptors were inventoried on the Ungalik River, Alaska, in 1977 and 1979. In 2008 we resurveyed the drainage, replicating the techniques used in 1979. The density of nesting raptors during the late nesting season has doubled in the past three decades, from six occupied territories detected in 1977 and four in 1979 to 12 in 2008. A single Peregrine Falcon (Falco peregrinus) was sighted during aerial surveys in 1977, and a pair of Peregrine Falcons was detected during a boat survey in 1979; however, nesting by these birds was not confirmed. In contrast, we detected five occupied Peregrine Falcon territories along the Ungalik River in 2008. Other changes in cliff-nesting raptor occurrence included a decrease in occupied Gyrfalcon (Falco rusticolus) territories from four in 1977 to one in 1979 and two in 2008, a decrease in Rough-legged Hawk (Buteo lagopus) nests from one in 1979 (none in 1977) to none in 2008, and increases in Golden Eagle (Aquila chrysaetos) nests, from two in 1977 and 1979 to five in 2008. Changes in the number of nests of cliff-nesting raptors in this small population may have resulted, in part, from natural variation associated with changes in weather or prey abundance. However, it is likely that the increase in nesting Peregrine Falcons is related to global population recovery. Our data indicate that factors other than available nesting sites limit cliff-nesting raptor numbers along the Ungalik River. Spatial analysis indicated that cliff-nesting raptor nests were most often on hills or cliffs that face away from the coast, which is the source of most storms.

scholarly journals The Danish Peregrine Falcon population: Reestablishment and eggshell thinning

2018 ◽  
Vol 26 (2) ◽  
pp. 159-163 ◽  
Author(s):  
Niels Peter Andreasen ◽  
Knud Falk ◽  
Søren Møller
Keyword(s):  
Power Plants ◽  
Small Population ◽  
Peregrine Falcon ◽  
Falco Peregrinus ◽  
Nest Boxes ◽  
Historic Time ◽  
Peregrine Falcons ◽  
Eggshell Thinning ◽  
Breeding Attempt

Abstract Denmark being a country with only a few suitable steep nesting cliffs has only harboured a small population of Peregrine Falcons (Falco peregrinus) in historic time. In the previous century, the population gradually declined due to persecution, egg and young collection, and pollution. The last breeding attempt in the 20th century occurred in 1972 in southeastern Denmark. No new breeding attempts were recorded in Denmark until 2001 but since then the population has gradually increased – most rapidly since 2012 – to a peak of 24 territorial pairs in 2018; some of them breeding on man-made structures (nest boxes at bridges and power plants). Here we update the information on the reestablishment of the Peregrine Falcon in Den-mark, including origin and dispersal, reproduction, and eggshell thinning.

Factors Influencing the Breeding Distribution of the Peregrine Falcon in Victoria, Australia

1997 ◽  
Vol 24 (4) ◽  
pp. 433 ◽  
Author(s):  
W. B. Emison ◽  
C. M. White ◽  
V. G. Hurley ◽  
D. J. Brimm
Keyword(s):  
Volcanic Activity ◽  
Human Activities ◽  
Peregrine Falcon ◽  
Factors Influencing ◽  
Tree Hollows ◽  
Peregrine Falcons ◽  
Large Trees ◽  
Breeding Distribution ◽  
Nesting Sites ◽  
Water Vegetation

Since 1950, 199 nesting sites of peregrine falcons (Falco peregrinus) have been found in Victoria. Over half (51%) are on natural cliffs, 37% in trees and 12% on human-made structures and stone quarry faces. Most eyries on natural cliffs occur in the uplands (>200 m elevation) or along the coast. Tree eyries are located in hollows and in stick nests of other birds; most of these are within the distributions of red gums and belahs. Human-made structures (other than quarries) supporting nests include dam walls, silos, electricity pylons and buildings. Factors believed to influence the breeding distribution of peregrine falcons in Victoria are discussed; these include volcanic activity, landform and elevation, water, vegetation, climate, other birds and humans. The influence of human activities on the distribution of nesting peregrine falcons appears to have been positive. However, the future of the population of peregrine falcons nesting in tree hollows is of concern: it is likely that large trees with nest hollows will be destroyed or will fall from decay long before sufficient numbers of replacement trees are available.

Performance Assessment Study of Indian Railways – Case of Low Efficiencies in Large Government Monopoly

2021 ◽  
pp. 036119812110255
Author(s):  
Sabyasachi S. Roy ◽  
Mukul Kulshrestha
Keyword(s):  
Scientific Basis ◽  
Data Envelopment ◽  
Policy Reforms ◽  
Management Planning ◽  
Rail Network ◽  
The Past ◽  
Assessment Study ◽  
Micro Level ◽  
Global Population ◽  
Financial Losses

Indian Railways is the world’s largest government-owned monopoly, annually carrying passenger numbers that surpass the global population. It is world’s fourth largest rail network after the U.S.A., China, and Russia, and is managed by a separate Ministry of Railways. The operating ratios have consistently been around 90% in the past several years, indicating that that the capability to generate operational surplus is low. Further, its expenditure on staff and their pensions has been increasing. Consequently, capacity growth is increasingly being funded through borrowings, which threatens to further worsen the financial situation. Thus, railway services in India are often perceived as being inefficient and unsatisfactory. However, this perception of inefficient services has no scientific basis as mid- and micro-level efficiency analyses of Indian Railways have never been carried out. This paper adopts a data envelopment analysis (DEA)-based approach to evaluate the performance efficiencies of the 69 divisions of Indian Railways. Six models that deploy a range of performance indicators like operating expenditures, numbers of staff employed or passengers carried, freight carried, rail network length, and revenues generated have been employed to assess efficiencies. The results demonstrate the existence of significant inefficiencies that may possibly be attributed to lack of proper management, planning policies, and mis-governance, resulting in significant financial losses. The paper discusses these issues and the policy reforms needed in the developing country context, while suggesting some reforms that may lead to improved sector performances.

scholarly journals Factors influencing the occurrence of negative interactions between people and crocodilians in Mexico

Oryx ◽  
2021 ◽  
pp. 1-9
Author(s):  
Giovany Arturo González-Desales ◽  
Luis Sigler ◽  
Jesús García-Grajales ◽  
Pierre Charruau ◽  
Martha Mariela Zarco-González ◽  
...  
Keyword(s):  
Anthropogenic Activities ◽  
Biosphere Reserve ◽  
Rigorous Evaluation ◽  
Caiman Crocodilus ◽  
Crocodylus Acutus ◽  
American Crocodile ◽  
Nesting Sites ◽  
The Relationship ◽  
Nesting Season ◽  
Negative Interactions

Abstract Negative interactions between people and crocodilians have increased worldwide, but in Mexico there have been few systematic reports and no rigorous evaluation of this problem. We compiled information on negative interactions between people and the spectacled caiman Caiman crocodilus and American crocodile Crocodylus acutus from the Worldwide Crocodilian Attack Database for 1993–2018, and we investigated interactions in greater depth, through interviews with people in La Encrucijada Biosphere Reserve. We examined the relationship between the occurrence of negative interactions between people and C. acutus and the species' nesting season and abundance, and presence records. In Mexico, the frequency of negative interactions increases when anthropogenic activities occur close to nesting sites (< 30 km) and during the nesting season (February–September). In La Encrucijada, following negative interactions with crocodiles, the local inhabitants killed 30 crocodiles measuring > 2.5 m long in 2011–2012. The frequency of negative human–crocodilian interactions was not correlated with the abundance of crocodilians but was correlated with the number of presence records of crocodiles. Strategies to minimize these interactions include warnings at nesting sites, increased monitoring of anthropogenic activities during the nesting season, and management of nests to prevent them being destroyed by people.

High Lights of the Past Nesting Season in Georgia

The Murrelet ◽  
1927 ◽  
Vol 8 (1) ◽  
pp. 5
Author(s):  
Thomas D. Burleigh
Keyword(s):  
The Past ◽  
Nesting Season

scholarly journals Trans-regional rice supply paradigm reveals unsustainable water use in China

Water Policy ◽  
2021 ◽  
Author(s):  
Liang Wu ◽  
Min Wang ◽  
Kirti Avishek
Keyword(s):  
Water Use ◽  
Northeast China ◽  
Southwest China ◽  
Water Security ◽  
Rice Production ◽  
Consumption Pattern ◽  
Sustainable Food ◽  
The Past ◽  
Production And Consumption ◽  
Global Population

Abstract Rice is an important staple food for more than half of the global population and one of the largest water consumers on earth. Improving the efficiency of water embedded in rice production and supply could have great implications for food and water security. This study starts from Yunnan, a traditional rice producing and consuming province in southwest China, and analyses its rice supply structure and dynamics, together with embedded water footprints (WFs) of three other regions: Northeast China, South and Southwest China and Southeast Asia. The results show that Yunnan has been under through drastic food change in the past decades, leading to increasing production and supply gap. Yunnan is found to have the least WF (778.2 m3/t) for rice production across the study regions, while Northeast China consumes the highest blue WF (364.6 m3/t) and blue to total WF ratio (97.7%). The study indicates that Northeast China is at risk of groundwater deficit due to rice production and export and the current rice production and consumption pattern is inefficient. The study suggests that policies for groundwater extraction, water resource price and international trade need to be in place to ensure sustainable food supply and water use at regional and national levels.

Plant-Based Proteins: The Good, Bad, and Ugly

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
William R. Aimutis
Keyword(s):  
Agricultural Production ◽  
Future Generations ◽  
Annual Review ◽  
Food Science ◽  
Publication Date ◽  
The Past ◽  
Per Capita ◽  
Consumption Enjoyment ◽  
Global Population ◽  
Made In

Our global population is growing at a pace to exceed 10 billion people by the year 2050. This growth will place pressure on the agricultural production of food to feed the hungry masses. One category that will be strained is protein. Per capita protein consumption is rising in virtually every country for both nutritional reasons and consumption enjoyment. The United Nations estimates protein demand will double by 2050, and this will result in a critical overall protein shortage if drastic changes are not made in the years preceding these changes. Therefore, the world is in the midst of identifying technological breakthroughs to make protein more readily available and sustainable for future generations. One protein sourcing category that has grown in the past decade is plant-based proteins, which seem to fit criteria established by discerning consumers, including healthy, sustainable, ethical, and relatively inexpensive. Although demand for plant-based protein continues to increase, these proteins are challenging to utilize in novel food formulations. Expected final online publication date for the Annual Review of Food Science and Technology, Volume 13 is March 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Curatorial Expeditions: The Ramallah Safari

2014 ◽  
Vol 1 ◽  
Author(s):  
Tina Sherwell
Keyword(s):  
The Past ◽  
Art Practices ◽  
The World ◽  
Stuart Hall ◽  
Occupied Territories ◽  
History Of ◽  
Definition Of

The last twenty-five years have witnessed significant transformation in the geopolitics of Palestinian art.[2] From the outset, we need to consider a definition of Palestinian art by recognizing that it is not art that is specifically created in one place, but that, owing to the history of dispossession and diaspora, Palestinian artists can be found all over the world. Therefore, Palestinian art necessarily starts from multiple sites of enunciation and is inevitably influenced by site and location. As Stuart Hall suggests, “identities are the names we give to the different ways we are positioned by, position ourselves within, the narratives of the past.”[3] For the purposes of this paper, I will mainly be focusing on the art of Palestinians from the Occupied Territories, while touching on the production of artists based in various other locations around the globe. I will first provide some context to the development of art practices, before specifically going on to speak about curatorial practices in relation to how the work of Palestinian artists is curated by international curators.

scholarly journals THE ANTHROPOCENE AND THE LONGEVITY REVOLUTION

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S542-S542
Author(s):  
Moon Choi
Keyword(s):  
Human Longevity ◽  
Future Research ◽  
Human Beings ◽  
Average Life ◽  
Average Life Expectancy ◽  
The Past ◽  
Life Expectancy At Birth ◽  
The Face ◽  
Important Evidence ◽  
Global Population

Abstract The Anthropocene, a term popularized in 2010 by Nobel Prize-winning chemist Paul Crutzen, refers to the current epoch during which human beings have begun to have a significant impact on the earth, e.g., the environment and climate change. Global population has grown approximately seven-fold over the past 200 years, while average life expectancy at birth has dramatically increased due to improvements in nutrition, medicine, and technology. The human Longevity Revolution thus provides important evidence of the Anthropocene. Yet, in the face of the Anthropocene, contemporary lifestyles rooted in capitalism–continually seeking more and bigger–are not sustainable; changes are needed for humanity to “live long on the damaged planet.” This presentation will discuss the Longevity Revolution in the context of the theory and previous research on the Anthropocene, then suggest an agenda for future research related to the intersection between the Anthropocene and the Longevity Revolution.

Direct and Indirect Estimates of Peregrine Falcon Population Size in Northern Eurasia

The Auk ◽  
2000 ◽  
Vol 117 (2) ◽  
pp. 455-464 ◽  
Author(s):  
J. L. Quinn ◽  
Y. Kokorev
Keyword(s):  
Population Size ◽  
Northern Eurasia ◽  
Published Data ◽  
Peregrine Falcon ◽  
Species Overlap ◽  
Peregrine Falcons ◽  
Nesting Association ◽  
The Common ◽  
Territory Density ◽  
Post Hoc

Abstract We used two different methods to estimate the density of nesting Peregrine Falcons (Falco peregrinus) across different parts of northern Eurasia. In the “territory-density” method, we extrapolated our density estimate of 406 km2 per territory (95% CI = 295 to 650 km2 per territory) in a high-density area, the Pyasina basin on the Taymyr Peninsula, to other similar areas across the range defined by published estimates. To estimate numbers in low-density areas, we used published data that suggested that Peregrine Falcon territories occur every 1,000 km2. Based on the nesting association between Peregrine Falcons and Red-breasted Geese (Branta ruficollis), we used a second, post hoc method to provide a comparative estimate where the ranges of the two species overlap. This model was based primarily on the population ecology of the Red-breasted Goose and included parameters such as the proportion of the goose population nesting with peregrines, the proportion of peregrine pairs associated with geese, goose population size, and three other variables. Some of these variables were already known, whereas others had been estimated as part of another study. The territory-density and nesting-association methods led to estimates of 1,586 (95% CI = 991 to 2,179) and 2,417 (95% CI = 1,306 to 3,528) falcon territories, respectively, across the common range of Peregrine Falcons and Red-breasted Geese; the first method suggested a population of 3,652 falcon territories (95% CI = 2,282 to 5,018) across the entire range F. p. calidus. Although both approaches entailed several major assumptions, together they provide the only quantitative estimate of this remote population of Peregrine Falcons.

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