scholarly journals The UK great bustard Otis tarda reintroduction trial: a 5-year progress report

Oryx ◽  
2011 ◽  
Vol 46 (1) ◽  
pp. 112-121 ◽  
Author(s):  
Robert J. Burnside ◽  
Ian Carter ◽  
Alasdair Dawes ◽  
David Waters ◽  
Leigh Lock ◽  
...  
Keyword(s):  
Release Site ◽  
Progress Report ◽  
Adult Survival ◽  
First Year ◽  
Founder Population ◽  
Trial Period ◽  
Great Bustard ◽  
Otis Tarda ◽  
The Uk ◽  
The 19Th Century

AbstractThe great bustard Otis tarda became extinct in the UK during the 19th century due to a combination of factors, including hunting, egg collection and changes in agriculture. In 2003 a 10-year licence was granted to begin a trial to reintroduce the species back to the UK. Here we report on the first 5 years of the trial and assess the progress made towards establishing a founder population. From April 2004 to September 2009 a total of 102 great bustard chicks were imported from Russia and 86 released on Salisbury Plain. Monitoring showed that post-release survival was 18% in the first year following release, and that mortality of released bustards was mainly attributable to predation and collisions. Estimated adult survival was 74%, although the sample size was small. All known surviving great bustards are faithful to the surroundings of the release site, returning throughout the year. A lek has been established where males have been observed displaying to females. The first nesting attempt was in 2007, and in 2009 two females aged 3 and 4 years successfully nested, fledging one chick each. Models incorporating the new demographic estimates suggest that at the end of the 10-year trial period the project can expect to have 8–26 adults as a founder population.

scholarly journals Impacts of survival and reproductive success on the long-term population viability of reintroduced great bustards Otis tarda in the UK

Oryx ◽  
2015 ◽  
Vol 50 (4) ◽  
pp. 583-592 ◽  
Author(s):  
Kate Ashbrook ◽  
Andrew Taylor ◽  
Louise Jane ◽  
Ian Carter ◽  
Tamás Székely
Keyword(s):  
Habitat Management ◽  
Bird Species ◽  
Population Viability ◽  
Adult Survival ◽  
Wild Populations ◽  
Great Bustard ◽  
Otis Tarda ◽  
Demographic Rates ◽  
The Uk

AbstractReintroductions aim to re-establish species within their historical ranges through the release of wild- or captive-bred individuals following extirpation (or extinction) in the wild. There is no general agreement on what constitutes a successful reintroduction but the probability of the population achieving long-term persistence should be addressed. Here we review a 10-year trial reintroduction of the great bustard Otis tarda, a globally threatened bird species, to the UK and assess the long-term population viability. Despite changes in rearing and release strategy, initial post-release survival probability remained consistently low, with only 11.3% of bustards (n = 167) surviving from release to 1 year post-release. Nineteen breeding attempts were made by eight females; however, only one chick survived > 100 days after hatching, and no wild juveniles have recruited into the population. Using demographic rates from the UK population and wild populations elsewhere, and stochastic population modelling, we investigate the viability of this reintroduced population by predicting population size over the next 10 years. Under current demographic rates the population was predicted to decline rapidly. Self-sufficiency was predicted only using the highest estimates from the UK population for first-year and adult survival, and recruitment rates from wild populations elsewhere. Although changes have been made in rearing, release strategies, habitat management and release sites used, these changes appear to have a modest effect on long-term viability. Substantial improvements in survival rates and productivity are necessary to establish a viable great bustard population in the UK, and we consider this unlikely.

scholarly journals The Great Bustard Otis tarda population in Morocco 1998–2001

2001 ◽  
Vol 12 (1) ◽  
pp. 19-33 ◽  
Author(s):  
Joachim Hellmich ◽  
Youssef Idaghdour
Keyword(s):  
Land Use ◽  
Habitat Loss ◽  
Carrying Capacity ◽  
Agricultural Intensification ◽  
Public Awareness ◽  
First Year ◽  
Great Bustard ◽  
Otis Tarda ◽  
Illegal Hunting ◽  
Education Campaigns

The Moroccan population of Great Bustard Otis tarda was surveyed in the four years 1998–2001. Highest numbers were counted in December 1998 (21 males, 62–65 females, four first-year males: total c. 90) and March 2001 (15 males, 60–66 females, four first-year males: total 75–81). Combining enquiry results from local people with these data, the population size for spring is estimated at 92–111 individuals, and 117–133 for winter. Reproduction is confirmed. Threats to the population include illegal hunting, habitat loss through agricultural intensification (irrigation, use of pesticides) and infrastructural changes (construction of a motorway and a powerplant), disturbance, and accidents at powerlines and antennas. Several conservation measures are suggested: cease hunting; maximize the attention given to display sites; encourage villagers to carry out “Great Bustard-friendly” land use and adapt animal stocks to the carrying capacity of their regions; clarify the situation of genetic exchange between Spanish and Moroccan populations; study movements between the Moroccan sites; monitor the size and trends of the most important subpopulations; and conduct education campaigns in schools and increase public awareness among adults.

Great Bustard (Otis tarda)

2020 ◽  
Author(s):  
Nigel Collar ◽  
Ernest Garcia
Keyword(s):  
Great Bustard ◽  
Otis Tarda

scholarly journals Rhetorical uses of precise numbers and semi-magical round numbers in political discourse about COVID-19: Examples from the government of the United Kingdom

2021 ◽  
pp. 095792652110131
Author(s):  
Michael Billig
Keyword(s):  
19Th Century ◽  
British Government ◽  
Political Incentives ◽  
The United Kingdom ◽  
Round Numbers ◽  
Magical Power ◽  
Uk Government ◽  
The Government ◽  
The Uk ◽  
The 19Th Century

This paper examines how the British government has used statistics about COVID-19 for political ends. A distinction is made between precise and round numbers. Historically, using round numbers to estimate the spread of disease gave way in the 19th century to the sort precise, but not necessarily accurate, statistics that are now being used to record COVID-19. However, round numbers have continued to exert rhetorical, ‘semi-magical’ power by simultaneously conveying both quantity and quality. This is demonstrated in examples from the British government’s claims about COVID-19. The paper illustrates how senior members of the UK government use ‘good’ round numbers to frame their COVID-19 goals and to announce apparent achievements. These round numbers can provide political incentives to manipulate the production of precise number; again examples from the UK government are given.

IMPROVEMENT AND ADAPTATION OF THE FAYOUMI CHICKEN

1994 ◽  
Vol 14 ◽  
pp. 33-39 ◽  
Author(s):  
M. A. Hossaryl ◽  
E. S. E. Galal
Keyword(s):  
Genetic Material ◽  
Research Station ◽  
Cooperative Society ◽  
Tropical Conditions ◽  
The Usa ◽  
The Creation ◽  
The Uk ◽  
The 19Th Century ◽  
Actual Prevalence

SUMMARYThe Fayoumi (Oasis/Province of Fayotimi) or Ramadi (village of Dar-el-Ramad) breed of chicken is said to have been introduced into this area in the early part of the 19th century; phenotypically it recalls the Silver Campine from which it is reputed to descend. A hardy and well adapted breed it was saved through the creation of the Fayoumi Poultry Research Station in 194é, which also assured an active improvement policy of the breed. The creation in 1958 of the Fayoumi Poultry Cooperative Society further strengthened the conservation of the breed and its use through distribution of genetic material to farmers and smallholders of the Fayoumi province. Since the early é0's the breed is reported to have been successfully introduced to countries as different as the UK and the USA, Vietn@ Iraq, Pakistan and India. Its adaptability and resistance to the problems of xyrotherrnic tropical and sub-tropical conditions is confirmed by its actual prevalence in Southern Egypt.

scholarly journals An OSCE as part of the first-year SpR assessmentinent in ENT

2006 ◽  
Vol 88 (9) ◽  
pp. 310-312 ◽  
Author(s):  
A Drake-Lee ◽  
D Skinner ◽  
A Reid
Keyword(s):  
First Year ◽  
European Law ◽  
Senior Registrar ◽  
The Uk ◽  
Second Wave

The structure of postgraduate hospital training in the UK has changed in the last 20 years: the Calman report brought training in line with European law and the SpR post was created out of the registrar and senior registrar posts. Implementation of the new training was staggered across specialties. ENT was included in the second wave of implementation in October 1995. At the same time, consultant expansion was envisaged.

scholarly journals Caterpillars of the marsh fritillary butterfly Euphydryas aurinia can extend their life-cycle in Scotland

2021 ◽  
Author(s):  
Neil O. M. Ravenscroft
Keyword(s):  
Life Cycle ◽  
Conservation Status ◽  
Northern Europe ◽  
First Year ◽  
Winter Mortality ◽  
Closely Related Species ◽  
Euphydryas Aurinia ◽  
High Conservation ◽  
The Uk ◽  
Marsh Fritillary

AbstractThe marsh fritillary Euphydryas aurinia is declining across Europe and is of high conservation interest. Its ecology has been defined and its conservation status assessed primarily from the affinities and populations of young caterpillars in the autumn, before hibernation and high winter mortality. The possibility that caterpillars of E. aurinia can overwinter more than once was investigated on the Isle of Islay, Scotland after caterpillars were found to occur at some locations in the spring despite a pre-hibernation absence. Closely-related species in North America and Northern Europe can prolong larval development by diapausing for a year as does E. aurinia in Scandinavia. Measurements of development and manipulations of distribution confirmed that some caterpillars do extend the life-cycle in Scotland and may occur in areas devoid of larvae in their first year. Caterpillars attempting this life-cycle develop slowly in spring, attain the normal penultimate spring instar and then enter diapause while other caterpillars are pupating. They moult just before diapause, construct highly cryptic webs and on emergence the following spring are 5–6 times heavier than larvae emerging in their first spring, or the equivalent of a month or so ahead. They attain a final, extra instar as larvae in their first spring reach the penultimate instar. Knowledge of this life-cycle is confined in the UK to Islay but its occurrence in this mild climate implies that it is more widespread.Implications for insect conservation Conditions that permit long diapause are probably precise and may not be reflected in recognised qualities of habitat. The species may also be present despite a perceived absence in autumn, the standard period for monitoring. Assessments of the prevalence of the life-cycle and its contribution to the persistence of E. aurinia are required. Populations of E. aurinia are known to fluctuate greatly and do occur below the observation threshold for long periods.

scholarly journals Key Mortality Causes of the Great Bustard (Otis Tarda) in Central Hungary: An Analysis of Known Fatalities

2015 ◽  
Vol 22 (2) ◽  
pp. 32-41 ◽  
Author(s):  
Csaba Vadász ◽  
Miklós Lóránt
Keyword(s):  
Data Collection ◽  
Anthropogenic Factors ◽  
Relative Importance ◽  
Great Bustard ◽  
Systematic Data ◽  
Otis Tarda ◽  
Negative Effect ◽  
Breeding Attempt ◽  
Mortality Causes ◽  
Systematic Data Collection

Abstract In this study, we identified the key mortality causes of eggs, juveniles and adults of the Great Bustard (Otis tarda) and quantified the relative importance of those, based on systematic data collection that have been carried out during the period between 2005 and 2014 at the Upper-Kiskunság region in Central Hungary. Rate of mortality regarding juveniles and adults was 39.71% caused by anthropogenic factors. Within the anthropogenic factors leading to mortality, collision was represented by 81.48% of fatalities, whereas mowing/hay making represented by 18.52%. Hay making/mowing was the factor leading to unsuccessful breeding attempt with the strongest negative effect on the breeding success of the investigated population of the Great Bustard, as it was represented by 50.96% of all known mortality cases. Chemical treatment had the factor with the second strongest effect, as it was represented by 12.33% of all known mortality cases. The rate of unsuccessful breeding (hatching) caused by particular activities (hay making/mowing, tillage, harvesting) varied between 68.42% and 75.00%. It was the disturbance by passers-by which led to the highest portion of unsuccessful breeding with 83.33% unsuccessful nests.

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