scholarly journals Proximate and ultimate causes of natal dispersal in the great bustard Otis tarda

1998 ◽  
Vol 9 (3) ◽  
pp. 243-252 ◽  
Author(s):  
J. C. Alonso ◽  
E. Martín ◽  
J. A. Alonso ◽  
M. B. Morales
Keyword(s):  
Natal Dispersal ◽  
Great Bustard ◽  
Otis Tarda

Great Bustard (Otis tarda)

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

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.

Genetic structure and population history of wintering Asian Great Bustard (Otis tarda dybowskii) in China: implications for conservation

2017 ◽  
Vol 158 (3) ◽  
pp. 761-772 ◽  
Author(s):  
Gang Liu ◽  
Xiaolong Hu ◽  
Aaron B. A. Shafer ◽  
Minghao Gong ◽  
Morigen Han ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Population History ◽  
Great Bustard ◽  
Otis Tarda ◽  
History Of

scholarly journals Underground cabling and marking of power lines: conservation measures rapidly reduced mortality of West-Pannonian Great Bustards Otis tarda

2011 ◽  
Vol 22 (3) ◽  
pp. 299-306 ◽  
Author(s):  
RAINER RAAB ◽  
CLAUDIA SCHÜTZ ◽  
PÉTER SPAKOVSZKY ◽  
EIKE JULIUS ◽  
CHRISTIAN H. SCHULZE
Keyword(s):  
Mortality Rate ◽  
Linear Models ◽  
Power Line ◽  
Distribution Range ◽  
Power Lines ◽  
Mortality Factor ◽  
Great Bustard ◽  
The West ◽  
Otis Tarda ◽  
Conservation Measures

SummaryCollisions with power lines represent an important mortality factor for Great Bustards Otis tarda throughout the distribution range of the species. This study evaluates the success of two conservation measures implemented in the West-Pannonian distribution range to reduce the number of power line collision casualties: (1) extensive underground cabling of 43.1 km power lines, and (2) marking of 89.7 km power lines starting in 2005 and 2006, respectively. The mortality rate of Great Bustards in our study area (covering 686.5 km2) decreased significantly between 2002 and 2011, predominantly caused by reduced mortality due to power line collisions. Univariate tests indicate that underground cabling and power line marking significantly decreased power line collision casualties. Generalised linear models (GLMs) highlighted the prominent effect of underground cabling. Our results indicate that five years after underground cabling and marking of power lines within core areas of the West-Pannonian distribution range of the Great Bustard, the population already benefited through a significantly decreased mortality rate. Both conservation measures most likely contributed strongly to the rapid recovery of the West-Pannonian Great Bustard population observed within the last decade.

Annual productivity and individual female reproductive success in a Great Bustard Otis tarda population

Ibis ◽  
2002 ◽  
Vol 144 (2) ◽  
pp. 293-300 ◽  
Author(s):  
Manuel B. Morales ◽  
Juan C. Alonso ◽  
Javier Alonso
Keyword(s):  
Reproductive Success ◽  
Great Bustard ◽  
Female Reproductive Success ◽  
Otis Tarda ◽  
Individual Female ◽  
Annual Productivity

Status and recent trends of the great bustard ( Otis tarda ) population in the Iberian peninsula

2003 ◽  
Vol 110 (2) ◽  
pp. 185-195 ◽  
Author(s):  
Juan C Alonso ◽  
Carlos Palacı́n ◽  
Carlos A Martı́n
Keyword(s):  
Iberian Peninsula ◽  
Great Bustard ◽  
Otis Tarda ◽  
Recent Trends

scholarly journals The Most Extreme Sexual Size Dimorphism among Birds: Allometry, Selection, and Early Juvenile Development in the Great Bustard (Otis tarda)

The Auk ◽  
2009 ◽  
Vol 126 (3) ◽  
pp. 657-665 ◽  
Author(s):  
Juan C. Alonso ◽  
Marina Magaña ◽  
Javier A. Alonso ◽  
Carlos Palacín ◽  
Carlos A. Martín ◽  
...  
Keyword(s):  
Sexual Size Dimorphism ◽  
Great Bustard ◽  
Size Dimorphism ◽  
Otis Tarda ◽  
Early Juvenile ◽  
Juvenile Development

Effects of great bustards (Otis tarda) on cultivated areas in west-central Spain

1998 ◽  
Vol 130 (1) ◽  
pp. 9-15 ◽  
Author(s):  
M. PESCADOR ◽  
S. J. PERIS
Keyword(s):  
Field Work ◽  
Cultivated Plants ◽  
Cereal Crops ◽  
Total Production ◽  
Central Spain ◽  
Great Bustard ◽  
Otis Tarda ◽  
Early Seedling Growth ◽  
West Central ◽  
Early Seedling

Great bustard (Otis tarda) populations in Spain are located mostly in cultivated areas during winter. The birds concentrate in large flocks and feed on cultivated plants. This paper reports two types of bustard-caused damage which occur in cereal, lucerne and vetch crops in west-central Spain, as a result of grazing and other bird activities such as display. Field work was carried out between 1994 and 1995. Damage to cereal crops was caused during germination and early seedling growth or to young plants, although plants were able to recover from this by regrowth and the overall yield was not reduced. Vetch crops were damaged in localized areas, but these recovered and were useful for forage enrichment or as grain. However, the damage to lucerne plots, although local, was extensive, resulting in yield losses of 23–31% with respect to the total production.

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