| an outbreak of yersinia pseudotuberculosis infection in a bustard (otis tarda) flock. | | 1988 | 3075881 |
| [infection of bustards (otis tarda l.) with endoparasites under breeding conditions]. | | 1984 | 6531929 |
| great bustard population structure in central spain: concordant results from genetic analysis and dispersal study. | we found significant sex differences in the mtdna genetic structure and dispersal patterns of great bustards in a population of 11 breeding groups, "leks", in central spain. the analysis of genetic distances showed that the female population was divided into three groups of leks separated by ca. 50 km, whereas male haplotypes were randomly distributed among leks. genetic distances among pairs of leks were positively correlated with geographical distances in females but not in males. while female ... | 2002 | 11798426 |
| natal dispersal in great bustards: the effect of sex, local population size and spatial isolation. | 1. we investigated the causes of natal dispersal in four spanish areas where 35 breeding groups of the polygynous great bustard otis tarda were monitored intensively. a total of 392 juveniles were radio-tracked between 1991 and 2006 by ground and via aeroplane to avoid potential biases derived from the non-detection of long-distance dispersers. 2. we explored 10 explanatory variables that were related to individual phenotypic features, habitat and conspecific traits in terms of group size and br ... | 2008 | 18179551 |
| population subdivision in europe's great bustard inferred from mitochondrial and nuclear dna sequence variation. | a continent-wide survey of sequence variation in mitochondrial (mt) and nuclear (n) dna of the endangered great bustard (otis tarda) was conducted to assess the extent of phylogeographic structure in a morphologically monotypic bird. dna sequence variation in a combined 809 bp segment of the mtdna genome from 66 individuals from the last six breeding regions showed relatively low levels of intraspecific sequence diversity (n = 0.32%) but significant differences in the regional distribution of 11 ... | 2000 | 10964236 |
| [prehistoric fauna in bulgaria]. | earliest husbandry in bulgaria is investigated by the example of the early neolithic settlement of koprivec. there was no domestication activity in the region. pig-keeping was of no importance during the earliest period. numerous bone-findings from the aeneolithic up to the bronze age settlement of durankulak build the base of a reconstruction of wildlife. most of the larger mammals were species that lived in forests. remarkable is the occurrence of the lion. a rich avifauna shows several specie ... | 1997 | 9157624 |
| pelvic plexuses of bustard (otis tarda l., 1758). | | 1982 | 6985139 |
| are species coexistence areas a good option for conservation management? applications from fine scale modelling in two steppe birds. | biotic interactions and land uses have been proposed as factors that determine the distribution of the species at local scale. the presence of heterospecifics may modify the habitat selection pattern of the individuals and this may have important implications for the design of effective conservation strategies. however, conservation proposals are often focused on a single flagship or umbrella species taken as representative of an entire assemblage requirements. our aim is to identify and evaluat ... | 2014 | 24498210 |
| wire marking results in a small but significant reduction in avian mortality at power lines: a baci designed study. | collision with electric power lines is a conservation problem for many bird species. although the implementation of flight diverters is rapidly increasing, few well-designed studies supporting the effectiveness of this costly conservation measure have been published. | 2012 | 22396776 |
| morphometric study of the brachial plexus in bustard (otis tarda l., 1758). | | 1982 | 6981571 |
| anatomy of the avian cecum. | the gross anatomy of the avian ceca is reviewed. in most birds, right and left ceca arise laterally or ventrolaterally at the junction of the small and large intestines. in a few species, the ceca open into the rectum ventrally or dorsally. in many herons and bitterns, only one cecum is present, and in the secretary bird there are two pairs of ceca. ceca are absent in woodpeckers, hummingbirds, swifts, kingfishers, pigeons, mousebirds, cuckoos, and parrots. ceca may be classified according to le ... | 1989 | 2575123 |
| climate 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 where this could be found, is an important protection issue. in this study, we selected the most suitabl ... | 2016 | 26855870 |
| forecasting large-scale habitat suitability of european bustards under climate change: the role of environmental and geographic variables. | we modelled the distribution of two vulnerable steppe birds, otis tarda and tetrax tetrax, in the western palearctic and projected their suitability up to the year 2080. we performed two types of models for each species: one that included environmental and geographic variables (space-included model) and a second one that only included environmental variables (space-excluded model). our assumption was that ignoring geographic variables in the modelling procedure may result in inaccurate forecasti ... | 2016 | 26939133 |
| genetic structure of the threatened west-pannonian population of great bustard (otis tarda). | the genetic diversity, population structure and gene flow of the great bustards (otis tarda) living in austria-slovakia-west hungary (west-pannonian region), one of the few populations of this globally threatened species that survives across the palaearctic, has been assessed for the first time in this study. fourteen recently developed microsatellite loci identified one single population in the study area, with high values of genetic diversity and gene flow between two different genetic subunit ... | 2016 | 26966677 |
| changes in bird-migration patterns associated with human-induced mortality. | many bird populations have recently changed their migratory behavior in response to alterations of the environment. we collected data over 16 years on male great bustards (otis tarda), a species showing a partial migratory pattern (sedentary and migratory birds coexisting in the same breeding groups). we conducted population counts and radio tracked 180 individuals to examine differences in survival rates between migratory and sedentary individuals and evaluate possible effects of these differen ... | 2017 | 27189508 |
| avian poxvirus infection in a flamingo (phoenicopterus ruber) of the lisbon zoo. | avian poxviruses (apv) are very large viruses spread worldwide in a variety of hosts. they are responsible for a disease usually referred to as pox, mainly characterized by nodular lesions on feather-free regions of the body. on may 2010, a young american flamingo (phoenicopterus ruber) of the lisbon zoo (portugal) developed a nodular lesion suggestive of poxvirus infection on its right foot. avipoxvirus was isolated from the lesion and a fragment of the p4b-encoding gene was amplified by polyme ... | 2016 | 27010277 |
| dna barcodes of asian houbara bustard (chlamydotis undulata macqueenii). | populations of houbara bustards have dramatically declined in recent years. captive breeding and reintroduction programs have had limited success in reviving population numbers and thus new technological solutions involving molecular methods are essential for the long term survival of this species. in this study, we sequenced the 694 bp segment of coi gene of the four specimens of asian houbara bustard (chlamydotis undulata macqueenii). we also compared these sequences with earlier published bar ... | 2012 | 22408462 |
| seropositivity and risk factors associated with toxoplasma gondii infection in wild birds from spain. | toxoplasma gondii is a zoonotic intracellular protozoan parasite of worldwide distribution that infects many species of warm-blooded animals, including birds. to date, there is scant information about the seropositivity of t. gondii and the risk factors associated with t. gondii infection in wild bird populations. in the present study, t. gondii infection was evaluated on sera obtained from 1079 wild birds belonging to 56 species (including falconiformes (n = 610), strigiformes (n = 260), ciconi ... | 2011 | 22216311 |
| possible cantharidin poisoning of a great bustard (otis tarda). | a possible cantharidin intoxication of a great bustard (otis tarda) was described. this wild bird died by a traumatism, but also presented diarrhoea, congestion of the gastrointestinal tract and kidneys and had ingested several blister beetles of the species berberomeloe majalis. the analysis of the stomach content by gc-ms revealed the presence of cantharidin at a concentration of 1.37 μg/g of wet weight, a similar level than in other birds poisoned in captivity. | 2011 | 22001622 |
| side effects of rodent control on non-target species: rodenticides increase parasite and pathogen burden in great bustards. | for many years anticoagulant rodenticides have been used in vole control campaigns, in spite of the proven risk of secondary poisoning of non-target predators and scavengers. in this paper we analyse for the first time great bustard exposure and intoxication by anticoagulant rodenticides in spain, based on residues found in the livers of 71 bustard carcasses collected during 1991-2010. ten individuals contained chlorophacinone and one flocoumafen. chlorophacinone level was significantly correlat ... | 2011 | 21889190 |
| [Suitability evaluation of great bustard (Otis tarda)'s wintering habitat in Baiyangdian basin]. | Based on the related researches of great bustard's wintering habitat selection as well as the advices of related experts and the distribution records of great bustard in Baiyangdian basin, 3 first class indices and 13 second indices were chosen to characterize the key factors affecting the wintering habitat selection of great bustard, and a habitat quality evaluation model was built to assess the quality of wintering habitat selection of great bustard in Baiyangdian basin. In 2005, the suitable ... | 2011 | 22007472 |
| complete mitochondrial genome of otis tarda (gruiformes: otididae) and phylogeny of gruiformes inferred from mitochondrial dna sequences. | the complete nucleotide sequence of mitochondrial genome of the great bustard (otis tarda) was determined by using polymerase chain reaction (pcr) method. the genome is 16,849 bp in size, containing 13 protein-coding, 2 ribosomal and 22 transfer rna genes. sequences of the trna genes can be folded into canonical cloverleaf secondary structure except for trna-cys and trna-ser (agy), which lose "dhu" arm. sequence analysis showed that the o. tarda mitochondrial control region (mtcr) contained many ... | 2010 | 19823949 |
| a conceptual model for assessing risks in a mediterranean natura 2000 network site. | every year millions of tons of chemical products are disposed to the environment as a result of human activities, with deleterious consequences to biodiversity. in europe the biodiversity policy basis for action is provided by the birds and the habitats directives. according to these directives a network of protected areas is being built across eu countries encompassing the natura 2000 network. but the management plans of these protected areas do not require an ecotoxicological assessment of che ... | 2009 | 18990432 |
| clinical haematology of the great bustard (otis tarda). | the haematological parameters of healthy great bustards (otis tarda l.) have been determined. the values obtained were red cell count (3.0 x 10(12) +/- 0.2 x 10(12/)1), white cell count (33.0 x 10(9) +/- 2.6 x 10(9)/1), haematocrit value (0.51 +/- 0.01 1/1), haemoglobin (13.0 +/- 0.3 g/dl), mean corpuscular volume (178.7 +/- 12.5 fl), mean cell haemoglobin concentration (25.0 +/- 0.6 g/dl), mean corpuscular haemoglobin (42.5 +/- 3.2 pg), differential white cell count: heterophils (22.5 x 10(9) + ... | 1991 | 18680064 |
| normal blood chemistry of the kori bustard (ardeotis kori). | blood samples were obtained from clinically normal captive adult kori bustards (ardeotis kori) in order to establish normal reference blood chemistry values for the species. twenty-four different tests were conducted using a kodak ektachem dt ii dry-chemistry system. a comparison of the values obtained was made with those of two sub-species of houbara bustard (chlamydotis undulata macqueenii and chlamydotis undulata undulata) and the great bustard (otis tarda), and showed some similarities betwe ... | 1996 | 18645847 |
| display activity and seasonality of faecal sexual steroids in male great bustard (otis tarda l.). | the non-invasive faecal sampling and ria was used to measure faecal equivalents of testosterone (t), dehydroepiandrosterone (dhea), oestradiol-17beta (e2) and progesterone (p4) in juvenile and adult great bustard males. possible connections of diurnal and seasonal changes of sexual steroid levels and display activity were studied. correlations were found between sexual steroid equivalent levels of faeces and display activity and agonistic behaviour in the different phases of annual cycle of adul ... | 2007 | 17385541 |
| [foraging habitat selection of otis tarda dybowskil during its breeding season]. | from april to july of 2000 and 2001, the authors studied the foraging habitat selection of otis tarda dybowskil in the southeast keerqin of inner mongolia by sampling method. the results showed that whether at burned or at non-burned grassland, the foraging habitat of otis tarda dybowski had the same feature in vegetation structure, the plant height was about 13 cm on average, with the highest of 30 cm, and there were abundant species of plants and insects with big density that the bird favored ... | 2005 | 15943365 |
| [abundance of trans-volga population of the great bustard (otis tarda l.)]. | we studied the abundance, spatial structure, and democratic parameters of the trans-volga population of great bustard as well as this species connection to the habitats during premigratory movements. the data were obtained by monitoring a test area of 1,200,000 hectares in 1998-2000. time-related changes in the structure of great bustard habitats in saratov trans-volga region during the 20th century are described and the mechanisms underlying the changes in this species connection to the habitat ... | 2003 | 14994471 |
| [behaviors time budget and daily rhythm of great bustard in breeding season]. | the direct observation method was adopted to study the breeding behaviors time budget and daily rhythm of wild great bustard (otis tarda) on the grassland of southeast keyouqianqi in inner mongolia municipality during the period from april to july in 2000 and 2001. the results showed that the behaviors time budget of great bustard were regularly in some degree, and there exited differences between male and female. the behaviors changed with the changes of activity space, food conditions and bree ... | 2003 | 14986370 |
| disease and mortality among great bustards (otis tarda) at whipsnade wild animal park, 1989 to 1999. | between 1989 and 1999, 351 clinical examinations and six postmortem examinations were made on the six great bustards (otis tarda) maintained at the whipsnade wild animal park. soft tissue-related traumatic injuries accounted for 35 per cent of all the clinical findings, musculoskeletal disorders accounted for 26 per cent, and lameness was one of the main reasons for a veterinary examination. poor condition accounted for 30 per cent of the clinical findings and was associated with periods of cold ... | 2003 | 14567664 |
| [on nest-site selection of otic tarda]. | during april to july in 2000 and 2001, the nest-site selection of otis tarda was studied by direct observation and sampling method in the southeast grassland of keyouqianqi in inner mongolia. the results showed that otis tarda was one kind of big-sized bird built nests on the ground in sparse cluster, and the smallest distance between nests was 9 m. otis tarda had a significant tendency in nest-site selection. firstly, this tendency was represented under the scale of landscape. most nests of oti ... | 2002 | 12625004 |
| males of a strongly polygynous species consume more poisonous food than females. | we present evidence of a possible case of self-medication in a lekking bird, the great bustard otis tarda. great bustards consumed blister beetles (meloidae), in spite of the fact that they contain cantharidin, a highly toxic compound that is lethal in moderate doses. in addition to anthelminthic properties, cantharidin was effective against gastrointestinal bacteria that cause sexually-transmitted diseases. although both sexes consumed blister beetles during the mating season, only males select ... | 2014 | 25337911 |
| subulura halli (ascaridida: subuluridae) from the endangered great bustard otis tarda linnaeus (aves: gruiformes) in china. | subulurid nematodes identified as subulura halli barreto, 1918 were collected from the endangered bird otis tarda linnaeus (gruiformes: otididae) in china. a detailed redescription of the hitherto poorly known species is presented using both light and, for the first time, scanning electron microscopy. previously unreported and erroneous morphological features of taxonomic significance are revealed. this species can be readily distinguished from its congeners by the relatively long oesophagus (1. ... | 2014 | 24684055 |
| models for human porphyrias: have animals in the wild been overlooked?: some birds and mammals accumulate significant amounts of porphyrins in the body without showing the injurious symptoms observed in human porphyrias. | humans accumulate porphyrins in the body mostly during the course of porphyrias, diseases caused by defects in the enzymes of the heme biosynthesis pathway and that produce acute attacks, skin lesions and liver cancer. in contrast, some wild mammals and birds are adapted to accumulate porphyrins without injurious consequences. here we propose viewing such physiological adaptations as potential solutions to human porphyrias, and suggest certain wild animals as models. given the enzymatic activity ... | 2020 | 33155299 |
| snow cover and snowfall impact corticosterone and immunoglobulin a levels in a threatened steppe bird. | birds use both the corticosterone stress response and immune system to meet physiological challenges during exposure to adverse climatic conditions. to assess the stress level and immune response of the asian great bustard during conditions of severe winter weather, we measured fecal corticosterone (cort) and immunoglobulin a (iga) before and after snowfall in a low snow cover year (2014) and a high snow cover year (2015). a total of 239 fecal samples were gathered from individuals in tumuji nat ... | 2018 | 29462600 |
| meta-barcoding insights into the spatial and temporal dietary patterns of the threatened asian great bustard (otis tarda dybowskii) with potential implications for diverging migratory strategies. | food resources are often not sufficient to satisfy the nutritional and energetic requirements during winter conditions at high latitudes. dietary analysis is a prerequisite to fully understanding the feeding ecology of a species and the nature of trophic interactions. previous dietary studies of asian great bustard (otis tarda dybowskii) relied on behavioral observations, resulting in categorization of diet limited to broad taxonomic groupings. here, we applied a high-throughput sequencing meta- ... | 2018 | 29435248 |
| combining occurrence and abundance distribution models for the conservation of the great bustard. | species distribution models (sdms) have become important and essential tools in conservation and management. however, sdms built with count data, referred to as species abundance models (sams), are still less commonly used to date, but increasingly receiving attention. species occurrence and abundance do not frequently display similar patterns, and often they are not even well correlated. therefore, only using information based on sdms or sams leads to an insufficient or misleading conservation ... | 2017 | 29255652 |
| intraspecific and interspecific competition induces density-dependent habitat niche shifts in an endangered steppe bird. | interspecific competition is a dominant force in animal communities that induces niche shifts in ecological and evolutionary time. if competition occurs, niche expansion can be expected when the competitor disappears because resources previously inaccessible due to competitive constraints can then be exploited (i.e., ecological release). here, we aimed to determine the potential effects of interspecific competition between the little bustard (tetrax tetrax) and the great bustard (otis tarda) usi ... | 2017 | 29188003 |
| west nile and usutu virus infections in wild birds admitted to rehabilitation centres in extremadura, western spain, 2017-2019. | west nile virus (wnv) is an emerging flavivirus transmitted generally by mosquitoes of culex genus. it is maintained in an enzootic life cycle where birds act as reservoir hosts. humans and horses are also susceptible to infection, and occasionally, they suffer from neurological complications. however, they do not transmit the virus to other vectors, behaving as dead-end hosts. sporadic wnv outbreaks observed in horses and wild birds from extremadura (western spain) during 2016 and 2017 seasons ... | 2021 | 33677369 |
| antiparasitic properties of cantharidin and the blister beetle berberomeloe majalis (coleoptera: meloidae). | cantharidin (ctd) is a toxic monoterpene produced by blister beetles (fam. meloidae) as a chemical defense against predators. although ctd is highly poisonous to many predator species, some have evolved the ability to feed on poisonous meloidae, or otherwise beneficially use blister beetles. great bustards, otis tarda, eat ctd-containing berberomeloe majalis blister beetles, and it has been hypothesized that beetle consumption by these birds reduces parasite load (a case of self-medication). we ... | 2019 | 31013660 |
| mitochondrial divergence between western and eastern great bustards: implications for conservation and species status. | the great bustard is the heaviest bird capable of flight and an iconic species of the eurasian steppe. populations of both currently recognized subspecies are highly fragmented and critically small in asia. we used dna sequence data from the mitochondrial cytochrome b gene and the mitochondrial control region to estimate the degree of mitochondrial differentiation and rates of female gene flow between the subspecies. we obtained genetic samples from 51 individuals of otis tarda dybowskii represe ... | 2018 | 29917081 |