Human disturbance and conspecifics influence display site selection by Great Bustards Otis tarda
نویسندگان
چکیده
منابع مشابه
Migration Patterns in Male Great Bustards (Otis tarda)
The Great Bustard (Otis tarda) is distributed from Iberia and Morocco in the west to China in the east and has been considered sedentary in all but the northern and eastern parts of its range (Gewalt 1959, Glutz et al. 1973, Cramp and Simmons 1980). However, some studies have reported seasonal changes in population numbers in different areas in the Iberian Peninsula (Hidalgo and Carranza 1990, ...
متن کاملGreat bustards Otis tarda in Morocco: status in spring 1999 and evidence of a decline in recent decades
A spring (1999) census was conducted of successful breeding in 1998. We argue that the small number of birds, a population sex ratio of 1 : 3.3 in great bustards Otis tarda in north-western Morocco, favour of females, evidence for a range contraction, and where a poorly known population of this species occurs. Sixty-four birds were seen in four distinct areas. probable isolation from other grea...
متن کاملClimate envelope predictions indicate an enlarged suitable wintering distribution for Great Bustards (Otis tarda dybowskii) in China for the 21st century.
The rapidly changing climate makes humans realize that there is a critical need to incorporate climate change adaptation into conservation planning. Whether the wintering habitats of Great Bustards (Otis tarda dybowskii), a globally endangered migratory subspecies whose population is approximately 1,500-2,200 individuals in China, would be still suitable in a changing climate environment, and w...
متن کاملThe MosT exTreMe sexual size DiMorphisM aMong BirDs: alloMeTry, selecTion, anD early Juvenile DevelopMenT in The greaT BusTarD (Otis tarda)
Resumen.—Otis tarda es el ave con mayor dimorfismo sexual y una de las de mayor peso entre las que conservan la capacidad de vuelo. Los machos adultos capturados en España fueron 2.48 veces más pesados que las hembras y sus medidas lineales un 18–30% mayores que las de las hembras. Entre finales del invierno y la estación reproductiva el peso medio aumentó en un 16% en las hembras y en un 20% e...
متن کاملHabitat Suitability Modeling of Great Bustard, Otis tarda, using ENFA and GIS
During the last century, the global population of the Great Bustard (Otis tarda) has decreased and this species is now considered vulnerable. In Iran, the status of this species is much more critical and its distribution is limited to a few areas of Bukan county. We modeled the suitability of habitat for Great Bustards in Bukan County with the goal of determining the most important of distribut...
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ژورنال
عنوان ژورنال: Bird Conservation International
سال: 2013
ISSN: 0959-2709,1474-0001
DOI: 10.1017/s0959270913000142