Luis M. Bautista Sopelana

Luis M. Bautista Sopelana
Spanish National Research Council | CSIC

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55
Publications
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Publications

Publications (55)
Conference Paper
Full-text available
The increase of the western populations of Common cranes (Grus grus) in the last five decades highlights the need to estimate survival rates. According to Euring databank (EDB), the oldest Common crane ever known was 27 years old in year 2017. This lifespan was obtained by means of 24,900 recoveries of 2,124 ringed cranes collected between years 19...
Conference Paper
Full-text available
In March 1988, the three-colour-code currently used to mark Common Cranes (Grus grus) was employed for the first time in Spain. This banding system had been proposed by Spanish researchers at the First Meeting of the European Crane Working Group in 1985 in Hungary, as an alternative to the harder-to-read alphanumeric rings. Between 1988 and 1992, t...
Article
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Arthropods and specifically beetles can synthesize and/or sequester metabolites from dietary sources. In beetle families such as Tenebrionidae and Meloidae, a few studies have reported species with toxic defensive substances and antiparasitic properties that are consumed by birds. Here we have studied the antiparasitic activity of extracts from bee...
Article
Full-text available
Industrial food animal production uses huge amounts of antibiotics worldwide. Livestock, their excreta used for manure and meat subproducts not intended for human consumption can all play important roles in the transmission of bacterial resistance to wildlife. Vultures and other scavengers can be directly exposed to active antibiotics ingested whil...
Article
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Gallocanta lagoon, NE Spain, is one of the main stopover and wintering areas of Common Cranes (Grus grus) migrating through Western Europe. We investigated how the water level of the lagoon where cranes roost, precipitation, and air temperature might have influenced the species' migration and wintering patterns in this area between 1973 and 2018. O...
Article
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Male-biased sexual size dimorphism (SSD) is common and related to male mating success in polygynous birds, but also occurs in monogamous species, in which sexual selection can be strong. In these species, SSD in morphological traits not directly related to reproductive function, such as locomotory or feeding structures, has remained difficult to ex...
Article
A simple methodology was developed to select new sex-specific primers for bird sexing from degraded and low-quantity DNA sources. The strategy was validated using highly degraded DNA extracted from Giemsa-stained blood smears of common cranes (Grus grus). The new primers allowed the accurate molecular sexing using (i) a classic approach of PCR foll...
Article
How animals use food resources according to their relative availability is essential for our understanding and predictions of ecosystem interaction. Non-linear functions between use and availability are described with the feeding functional response, a key tool to describe such functions that is still poorly understood in some cases. For example, i...
Chapter
Full-text available
Eurasian Cranes (Grus grus) started staging at Gallocanta, NE Spain, in 1973, just after waterfowl hunting was prohibited in the lake. Since then, crane numbers increased in the area each year, due to the abundant food resources provided by intensive cereal farming. During the mid-1980s, farmers started claiming compensations for the damages caused...
Article
Full-text available
Knowledge about the population size and trends of common bird species is crucial for setting conservation priorities and management actions. Multi-species large-scale monitoring schemes have often provided such estimates relying on extrapolation of relative abundances in particular habitats to large-scale areas. Here we show an alternative to infer...
Article
A simple methodology was developed to select new sex-specific primers for bird sexing from degraded and low-quantity DNA sources. The strategy was validated using highly degraded DNA extracted from Giemsa-stained blood smears of common cranes (Grus grus). The new primers allowed the accurate molecular sexing using (i) a classic approach of PCR foll...
Article
Full-text available
Intra-specific coloration polymorphism coupled with an ancient process of lineage differentiation in Berberomeloe maja-lis (Linnaeus, 1758) offers the opportunity to analyse the temporal scenario in which the correlation between toxicity and coloration might have evolved. Based on phylogenetic and phylogeographic analyses, we identified the timing...
Article
Full-text available
Sexual size dimorphism (SSD) may favour physiological peculiarities in diet, behaviour and home-range size both across species and within species. Sex-specific differences in diet and behaviour have been reported in several bird species but there are fewer studies of foraging area size in sexually dimorphic bird species. Foraging area size should b...
Article
Full-text available
In sexually size-dimorphic species, physiological constraints derived from differences in body size may determine different nutritional requirements and thus a trophic niche divergence between males and females. These relationships between sexual dimorphism and dietary overlap are not well understood in birds. We compared the diet of males and fema...
Chapter
Full-text available
El comportamiento satisface u optimiza la obtención de un recurso en función de su abundancia y de la capacidad de utilizarlo por parte del individuo. La optimización del comportamiento se puede conseguir maximizando la tasa neta de obtención y manejo del recurso, la eficiencia o un valor intermedio entre la tasa neta y la eficiencia, dependiendo d...
Article
Full-text available
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 gastro...
Article
Birds are important seed dispersers for fleshy fruits through their transportation of ingested seeds. The seeds of many species germinate faster and in greater proportions after passing through a digestive tract, although the effects of this passage vary amongst bird and plant species. Many factors determine the germination success of ingested seed...
Article
Full-text available
A comprehensive review of Common crane natural history in Spain (text in Spanish). Edition 5 published on 2014.06.10. Revisión extensa de la historia natural de la grulla común (Grus grus) en España. Versión 5 (10/06/2014). Identificación: Ave de color grisáceo y tamaño grande (110 cm de longitud y 200 cm de env(…) Voz: Grito o graznido de largo...
Article
Full-text available
Because large species ingest proportionally less food than small ones, it may be predicted that they should incorporate relatively fewer carotenoids to a proportionally equal volume of blood. However, some species may increase their levels of circulating carotenoids by ingesting unusual food. We tested whether the plasma concentration of carotenoid...
Article
Full-text available
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 gastro...
Article
Full-text available
Birds are important seed dispersers for fleshy fruits through their transportation of ingested seeds. The seeds of many species germinate faster and in greater proportions after passing through a digestive tract, although the effects of this passage vary amongst bird and plant species. Many factors determine the germination success of ingested seed...
Article
Full-text available
Disturbance and predation risks from terrestrial animals decline the higher up the nest sites selected by birds that nest in wall cavities are located. Terrestrial predators can also negate the protective quality of higher nesting sites by approaching from above in walls. It is unknown how terrestrial predation risks from below and above walls dete...
Article
Full-text available
Among birds, vultures show low concentrations of plasma carotenoids due to the combination of their large size, general dull colouration and a diet based on carrion. We recorded the concentration of each carotenoid type present in plasma of the Andean condor (Vultur gryphus) according to age and sex, that determine colour signalling and dominance h...
Article
Faecal sexual steroids have been used in field studies evaluating the relationships between gender and the multiple factors influencing endocrine status of individuals. The determination of faecal steroids has been also proposed as an alternative, non-invasive sexing method when other methods were deemed impractical or risky for the health of birds...
Article
Full-text available
Avian foraging activity during daytime peaks after dawn and before dusk. The relative importance of each period of intensive foraging on the accumulated intake varies by species, individual, and day. We studied the relative importance of each period from direct observation of radio-tagged Common Cranes (Grus grus) during winter at a site of stopove...
Article
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We update and present relevant information regarding the abundance and distribution of the great bustard Otis tarda in Castilla y León (Spain) in 2008, compare it with previous census results, and analyse the effects of agricultural changes on the provincial abundance and distribution of the species. The study area was surveyed from four-wheel driv...
Conference Paper
Full-text available
Background/Question/Methods Farmland ecosystems are severely threatened due to agricultural intensification which contributes to a significant loss of biodiversity. Farmland and steppe birds are particularly vulnerable species linked to these ecosystems and are the most threatened bird group, with 83% of the species subject to unfavourable status....
Article
Great Bustards Otis tarda have expanded their habitat range from historical occupancy of natural steppes to arable farmland, where the species initially benefited from favourable feeding conditions. More recently, the species has suffered severe declines due partly to agricultural intensification. Nest losses and juvenile mortality are amongst the...
Article
Full-text available
Nest-site selection and nesting success in Azure-winged Magpies Cyanopica cyana were studied in 1986 in central Spain. Preferred nest sites were a nonrandom subset of the available habitat. Nests built on evergreen trees had significantly earlier clutch initiation dates than those built on deciduous trees. Birds selected larger trees of each specie...
Article
Full-text available
Theoretical models predict that small birds should adjust daily patterns of body mass gain in response to environmental and internal factors. In a companion paper, we described a model on daily fattening that allows the analysis of precise changes in the shape of hourly patterns of body mass. In this study, we tested one of the main predictions of...
Article
Full-text available
Small birds show the greatest rates of body mass gain at dawn and before dusk. Some environmental and internal factors may change the intensity and duration of the first period of body mass gain relative to the second one, and thus may change the shape of daily fattening trajectories. A frequent problem for researchers is setting the periods of the...
Article
Full-text available
Research on animals has produced more than 1000000 papers. Not surprise: a few species got the big portion of the research output. What about the shy, scarce or bizarre species? In this letter we show what animals groups (protozoa were kindly included) are overstudied or understudied according to the number of species. Just for the sake of curiosit...
Article
We describe winter territoriality in common cranes, Grus grus, a long-lived migrant species with long-lasting pair bonds and parental care extending throughout the winter. Cranes are territorial in the breeding season, and usually gregarious during migration and wintering. Only 2% of the families present in our study area were territorial, all othe...
Article
Full-text available
The traffic load near large cities may show dramatic cyclical changes induced by weekend tourism, and this could induce cyclical changes in the activity patterns of wildlife. We studied a 19-km-long section of a road that crossed a high-use raptor area near a large city in Spain. We observed 18 raptor species along this segment of the road, includi...
Article
Summary • Interference is a key component of food competition, but is difficult to measure in natural animal populations. Using data from a long-term study, we show that interference between common cranes Grus grus L., feeding on patches of cereal seeds, reduces intake rates at high competitor densities, and that the strength of interference is unr...
Article
Full-text available
In a dominance-structured flock, social status may determine priority of access to food. Birds of low social status may perceive present and future access to food as less predictable, and so have a higher risk of starvation, than birds of high social rank. Theoretical models predict that subordinate birds should carry larger fat reserves and incur...
Article
Full-text available
We test the predictive value of the main energetic currencies used in foraging theory using starlings that choose between two foraging modes (walking versus flying). Walking is low-cost, low-yield, whereas flying is the opposite. We fixed experimentally, at 11 different values, the amount of flight required to get one food reward, and for each flig...
Article
Current theory of risk-sensitive foraging predicts that forages should choose feeding sites on the basis of variation in as well as mean reward rate when there is a shortfall in their food supply or a decrease in their. energy budget. For a given mean reward delay, they should choose high variance feeding sites if they al e running below energy req...
Article
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The number of papers published in zoology between 1978 and 1998 were 1308244, according to the Zoological Records (BIOSIS ®) and 15% of them reported studies on birds. Although the class Insecta had the largest number of papers in that period, more papers were published about mammals and birds than insects in proportion to the number of species in...
Article
Full-text available
Current theory predicts small birds should have a reduced body mass when daytime predation risk is high. However, the influence that nighttime predators might have on changes in body mass or daytime foraging behaviour has not been addressed. We therefore studied the effect of changes in perceived nocturnal predation risk on the body mass of captive...
Article
Full-text available
Optimal foraging theory predicts that an individual should resort to intraspecific kleptoparasitism when this foraging strategy helps to maximize its intake rate. Thus aggressor and victim should be foraging at lower and higher rates, respectively, than the flock average (intake rate maximization). Independent of the maximization principle, moreove...
Article
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Foraging adaptations include behavioral and physiological responses, but most optimal foraging models deal exclusively with behavioral decision variables, taking other dimensions as constraints. To overcome this limitation, we measured behavioral and physiological responses of European starlings Sturnus vulgaris to changes in food availability in a...
Article
Full-text available
We studied the behavior of 13 radiotagged cranes dispersing from a communal roost over days when they changed their main daily foraging area between consecutive days during two winter seasons. Individuals went to a new foraging zone when on the previous day their morning food intake had fallen below their mean morning food intake measured over the...
Article
Full-text available
Los modelos de optimización sirven para estudiar comportamientos sencillos como la búsqueda y obtención del alimento. Aceptando que en momentos de necesidad E:lxiste una relación directa y positiva entre la ingestión de energía y la eficacia biológica, los animales han de conseguir la mayor cantidad de energía que esté disponible 1. Un comportamien...
Article
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1. The densities of common cranes Grus grus in 10 zones of a wintering area were approximately proportional to the amounts of food resources, but some overuse of the zones with highest food densities was observed, i.e. greater numbers of birds than expected used these zones. The distribution resembled ideal free distribution only after numbers of c...
Article
The marginal value theorem states that foragers should leave patches when the instantaneous capture rate has fallen to the average capture rate for the habitat. This predicts that patch residence time should increase with increasing patch quality and decrease with increasing habitat quality. These and other predictions from prescient, Bayesian and...
Article
Full-text available
1. Between 1981 and 1991, the number of cranes Grus grus at Gallocanta, NE Spain, showed peaks during autumn and spring migrations and troughs in midwinter. Autumn and spring counts increased throughout the study period, while the number of wintering cranes varied between years without a clear trend. 2. Large amounts of waste seeds were usually ava...
Article
Full-text available
The spatial variation in the density of white storks Ciconia ciconia in Spain is analysed with respect to landscape and meteorological variables. The density of breeding pairs in 1985 was negatively correlated with surface cover of woodlands and shrublands, and positively correlated with the area of dry or wet grasslands, reflecting food availabili...
Article
Full-text available
1.1. We studied the blood composition of common cranes (Grus grus) along the wintering period (October–March).2.2. Plasma proteins decreased along the winter period whereas plasma urea increased. Both parameters were highly correlated.3.3. Plasma levels of uric acid, triglycerides and cholesterol did not change during the winter. Young birds showed...
Article
Full-text available
The numbers of common cranes (Crus grus) staging and wintering at Laguna de Gallocanta, northeastern Spain, have increased throughout the period 1970-90. Consequently, we modeled the use of this area by cranes using Box-Jenkins Time Series Analysis to evaluate the influence of local food availability, duck hunting, and habitat and food conditions a...
Article
Full-text available
Nest-site selection and nesting success in Azure-winged Magpies Cyanopica cyana were studied in 1986 in central Spain. Preferred nest sites were a nonrandom subset of the available habitat. Nests built on evergreen trees had significantly earlier clutch initiation dates than those built on deciduous trees. Birds selected larger trees of each specie...
Article
Full-text available
The breeding success of Azure-winged Magpies was studied in Central Spain during 1986. Nesting density was 1.01 nests/ha, but nests were clumped. Breeding season was short and synchronized. Clutches were initiated between 10 April and 25 May. Clutches were started in 69% and completed in 60% of 136 nests built. Mean clutch size was 6.2 eggs. Only 3...
Article
Full-text available
The relations between numbers of Common Cranes Grus grus departing on spring migration and weather, progress of season and course of migration were studied at Gallocanta, NE Spain during February-March 1984 and 1985. Rain, cloudiness and strong headwinds were important fac-tors inhibiting migration. Most cranes migrated in association with the sout...
Article
Full-text available
The relationships between the daily pattern of Common Crane Grus grus migration departures from a staging area and variables related to weather and number of birds were studied during 1984 and 1985 (totalizing 30 days with migration) using multivariate statistical analysis. Cranes left the roost to the foraging areas between 0628 and 0715 hours. On...
Conference Paper
Full-text available
A simple deterministic model describing the population dynamics of Western European common cranes Crus grus has been developed. Here we present an updated version of the model and test the effects of various natural and man induced events. Low hunting rates (5% of total population or 1,000 birds annually) do not significantly reduce the size of the...

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