Cristian Pérez Granados

Cristian Pérez Granados
University of Alicante | UA · Ecology

Biology

About

100
Publications
22,999
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439
Citations
Additional affiliations
March 2011 - present
University of Alicante
Position
  • PhD Student
May 2010 - January 2011
Universidad Autónoma de Madrid
Position
  • Field technician

Publications

Publications (100)
Article
Full-text available
Iberian natural steppes have traditionally been used for extensive sheep grazing, which has been noted to be positively associated with steppe bird abundance and diversity. Sheep numbers in Spain, which harbors the largest European populations of many steppe bird species, decreased by 9.2 million (37.3%) between 1992 and 2020. Steppe birds in Spain...
Article
Full-text available
Stress in birds has been widely studied through the measurement of heterophil-to-lymphocyte ratio (H/L ratio). In this study we aimed to assess for the first time the potential variation of stress, measured as H/L ratio, associated to geography (between-country variation) and seasonality (between seasons and within the breeding season), as well as...
Preprint
Full-text available
The Asian hornet ( Vespa velutina ) has rapidly become a source of stress for the beekeeping sector. Several methods have been developed to control its impact and spread, though some of these impose a high risk for native insects. Among these methods are electric harps, which are physical barriers that electrocute hornets passing through two wires...
Article
Full-text available
Chaco Chachalaca (Ortalis canicollis) is a declining Neotropical bird, for which our current knowledge about its natural history is very limited. Here, we evaluated for first time the utility of passive acoustic monitoring, coupled with automated signal recognition software, to monitor the Chaco Chachalaca, described the vocal behavior of the speci...
Article
Full-text available
Nighttime studies are underrepresented in ecological research. Even well-known behaviors, such as the loud call of howler monkeys, are rarely studied at night. Our goal was to help fill this knowledge gap by studying the 24 h vocal behavior of the Guianan red howler monkey (Alouatta macconnelli) and to compare the acoustic structures of howling bou...
Article
Full-text available
Abstract: Climatic conditions represent one of the main constraints that influence avian calling behavior. Here, we monitored the daily calling activity of the Undulated Tinamou (Crypturellus undulatus) and the Chaco Chachalaca (Ortalis canicollis) during the dry and wet seasons in the Brazilian Pantanal. We aimed to assess the effects of climate p...
Article
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Wind farm implementation is a rapidly growing source of landscape transformation that may alter ecological processes such as predator–prey interactions. We tested the hypothesis that wind farms increase the activity of nest predators and, ultimately, increment ground-nest predation rates. We placed 18 plots in Iberian shrub-steppes (11 at control a...
Article
Full-text available
Cue counting is a method developed for estimating vocally active wildlife density by dividing the density of cues (number of cues per unit area surveyed per unit time) by the average cue rate (ACR) at which individuals vocalize. It has been used successfully to estimate whale density using passive acoustic monitoring, but its efficacy has had limit...
Article
Full-text available
Monitoring the vocal behavior of owls is challenging because of their nocturnal habits and limited vocal activity. Here, we evaluated the use of passive acoustic monitoring coupled with automated signal recognition software to monitor the spontaneous vocal activity of the Ferruginous Pygmy-Owl (Glaucidium brasilianum) over a complete annual cycle a...
Article
Full-text available
Understanding patterns of dispersal behaviour of threatened species is important in conservation biology and population ecology, especially in fragmented landscapes. Dupont's Lark Chersophilus duponti is a threatened passerine whose European population has declined by around 40% in the last decade. To study natal and breeding dispersal of the speci...
Article
Full-text available
Conservation research is less often applied in practice than is desirable for the optimization of conservation outcomes. We evaluated this conservation research-practice gap for a threatened passerine, Dupont's lark Chersophilus duponti. We reviewed the literature and classified the conservation interventions proposed by scientists as regulation an...
Article
Full-text available
Passive acoustic monitoring is a non‐invasive tool for automated wildlife monitoring. This technique has several advantages and addresses many of the biases related to traditional field surveys. However, locating animal sounds using Autonomous Recording Units (ARUs) can be technically challenging, and therefore ARUs have traditionally been little e...
Preprint
Full-text available
The extent and impacts of biological invasions on biodiversity are largely shaped by an array of socio-ecological predictors, which exhibit high variation among countries. Yet a global synthetic perspective of how these factors vary across countries is currently lacking. Here, we investigate how a set of five socio-ecological predictors (Governance...
Article
Full-text available
Passive acoustic monitoring, when coupled with automated signal recognition software, allows researchers to perform simultaneous monitoring at large spatial and temporal scales. This technique has been widely used to monitor cetaceans, bats, birds, and anurans but rarely applied to monitor primates. Here, we evaluated the effectiveness of passive a...
Article
Full-text available
The moon phase affects the ecology and vocal activity of nightjars (Caprimulgidae). However, some studies have found contradictory results regarding the impact of the moon phase on the vocal activity of nightjars. To increase our knowledge on this topic, we monitored the vocal behavior of two Neotropical nigthjars, the Little nightjar (Setopagis pa...
Article
Full-text available
Access here: https://onlinelibrary.wiley.com/share/author/QM7CYNCAPXNW4FXBPNQZ?target=10.1111/ibi.12909 Some diurnal birds vocalize at night, but the reason for this has seldom been studied. We monitored the nocturnal vocal activity of the Undulated Tinamou Crypturellus undulatus from June 2015 to May 2016 at three recording stations in the Brazil...
Article
Full-text available
Current knowledge regarding the vocal behavior in tropical non-passerines is very limited. Here, we employed passive acoustic monitoring to study the vocal activity of the white-tipped dove (Leptotila verreauxi) at three sites over a year in the Brazilian Pantanal. The diel pattern of vocal activity showed a bimodal pattern, with significantly high...
Article
Full-text available
The use of Autonomous Recording Units (ARUs) for wildlife monitoring has increased in recent years. Acoustic monitoring has been used for a wide range of research topics, but it has rarely been used for monitoring wildlife migrations. In this work we evaluate the use of acoustic monitoring to characterise the diurnal migration pattern of a bird spe...
Article
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Moult is a vital and endogenously controlled process in the avian life. However, birds may modulate their feather renovation properties, such as the extent of moult, based on exogenous factors. Despite the large body of knowledge about moult patterns, numerous questions remain unclear. In this study, we aimed to improve our knowledge about the fact...
Article
Full-text available
Bird vocal activity is affected by endogenous and exogenous factors. Owl surveys are mainly based on the detection of nocturnal calls, and therefore, the impact of exogen-ous factors on owls' vocal activity may have consequences in conservation planning and behavioural studies. However, our current knowledge about the impact of climatic factors and...
Article
Full-text available
Our current knowledge of the vocal behaviour of Palaeognathae is limited, although it may increase our understanding of the evolution of avian vocal behaviour. The Greater Rhea (Rhea americana) has a complex syrinx, and males produce guttural sounds during the courtship display, which makes this species an interesting model to study vocal behaviour...
Article
Full-text available
Potoos (Nyctibius spp.) are nocturnal Neotropical canopy-dwelling birds, making them one of the most enigmatic and least known avian families. The Common Potoo (Nyctibius griseus) and the Great Potoo (Nyctibius grandis) are the most widespread species, but little information on their life histories is available. We evaluated the utility of autonomo...
Data
Data Sets Audios of Common Potoo (Nyctibius griseus) and the Great Potoo (Nyctibius grandis) in the Brazilian Pantanal
Article
Full-text available
Anuran advertisement calls are life history traits associated with sexual selection and reproduction, and they play an important role in premating isolation mechanisms between species. Comparative bioacoustical analyses of these calls can be useful for taxonomic purposes. Phylogenetic relationships within the genera Pseudis are controversial, espec...
Article
Full-text available
The ecology of tropical wildlife remains unknown for most nocturnal species owing to difficulties in performing night surveys. To improve our understanding of the ecology of nocturnal tropical birds, we monitored the calling activity of two Neotropical nightjars, the Little nightjar (Setopagis parvula) and the Common pauraque (Nyctidromus albicolli...
Article
Full-text available
Despite increasing interest in moult in birds, there are still clear gaps in our knowledge of this topic. For example, many aspects of the moult of several European passerines remain unknown. Here, I describe the extent of the postjuvenile and the post-breeding moult of Black Wheatears Oenanthe leucura in south-eastern Spain and analyse the possibl...
Article
Full-text available
Moon phase affects the ecology and behaviour of animals and may thus affect both circadian and circannual rhythms. Its influence on nocturnal and dawn bird behaviour is known, but fewer studies have examined its effect on passerines' singing activity, some of which have yielded contradictory findings. With the aim of elucidating whether moon phase...
Article
Full-text available
Acoustic monitoring provides the opportunity to study ecological pro-cesses that are difficult to assess with traditional surveys. Elachistocleis matogrosso is an anuran species, described in 2010, for which limited biological information is available. This study investigated the calling activity of the species in the north-eastern portion of the Pan...
Article
Full-text available
Tinamous (Tinamidae) are a group of Neotropical birds for which little information is available. The Undulated Tinamou (Crypturellus undulatus) is one of the most widespread species but also declining. Due to its secretive habits, ecological knowledge regarding the species relies on few anecdotal descriptions. We used automated recorders to monitor...
Article
Full-text available
Anuran calling behaviour is determined by environmental, endogenous, and social factors. The effect of these factors usually differs among and within species. We used acoustic monitoring to evaluate the effects of environmental predictors on the daily occurrence and call production of Elachistocleis matogrosso (Microhylidae) in the northeastern Bra...
Article
Full-text available
The interactions between ecosystem components and their implications on birds have been poorly studied, especially in shrub-steppes. In this work, we evaluate the interactions between vegetation structure, arthropods availability and the use of space by the Dupont´s lark (Chersophilus duponti) in important areas for the species in the Iberian Penin...
Article
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Some birds use social cues, such as the presence of conspecifics, when selecting breeding habitat. This phenomenon, known as conspecific attraction, has been well‐documented in migratory species, but has not been assessed for resident species of birds. We used Dupont's Larks (Chersophilus duponti) as a model species to determine if conspecific attr...
Article
Full-text available
https://bioone.org/journals/Ardeola/volume-66/issue-2/arla.66.2.2019.ra4/Cost-Effectiveness-Assessment-of-Five-Audio-Recording-Systems-for-Wildlife/10.13157/arla.66.2.2019.ra4.short Audio recording systems coupled with automated song recognition are commonly being used for monitoring wildlife. Recorders usually differ in cost and effectiveness, an...
Presentation
La pérdida y transformación de los paisajes esteparios es considerada la principal causa del declive que han sufrido las poblaciones ibéricas de alondra ricotí (Chersophilus duponti) en las últimas décadas. Entre otros, los procesos de matorralización, originados en su mayoría por el abandono del pastoreo extensivo tradicional, han reducido la cant...
Article
Full-text available
Autonomous Recording Units have been widely used in a large number of bird studies in recent years, but challenges remain in estimating abundance based on acoustic monitoring. We tested whether or not Vocal Activity Rate index (the number of songs per unit time for a species), recorded using Autonomous Recording Units, was related to population abu...
Article
Full-text available
Los efectos del fuego sobre la fauna terrestre son devastadores. Pero algunas especies pueden verse beneficiadas. Una de ellas es la alondra ricotí, amante de las parameras y del matorral ralo, una estructura vegetal que antaño se encargaba de mantener a raya el ganado extensivo.
Book
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Este volumen contiene siete artículos sobre la avifauna madrileña. Algunos se basan en estudios de larga duración, como el dedicado al papamoscas cerrojillo, que abarca cuarenta años de seguimiento; el realizado a partir de diez años de anillamiento de paseriformes; y el basado en la observación de gaviotas argénteas en vertederos durante doce años...
Article
Full-text available
Biology and conservation of Dupont's Lark Chersophilus duponti Dupont's Lark is one of the most emblematic steppe bird species in Spain. Here, we review advances in knowledge of its basic biology and ecology during the past decade, with special emphasis placed on studies carried out in a peripheral population located in Rincón de Ade-muz (Valencia)...
Article
Full-text available
Monitoring programmes are needed to assess the conservation status of species and to quantify the effectiveness of conservation effort. Rare species are usually poorly studied due to difficulties in monitoring. We evaluated the use of autonomous recording units (ARUs) coupled with automated song recognition for monitoring the presence of Dupont’s L...
Article
Full-text available
Semi-natural open habitats have drastically changed in the last few decades due to agricultural intensification and rural depopulation. Steppe-birds, and especially those adapted to primary stages of vegetation succession, are threatened by an increase in scrub cover, and management actions are being applied to reverse scrub encroachment and restor...
Article
Full-text available
Background Steppe-birds face drastic population declines throughout Europe. The Dupont’s lark Chersophilus duponti is an endangered steppe-bird species whose European distribution is restricted to Spain. This scarce passerine bird could be considered an ‘umbrella species’, since its population trends may reveal the conservation status of shrub-step...
Data
Results of regional Switching Linear Trend models for each Autonomous Community. Wald-tests and associated p-values (p) are shown. For each period, the annual change rate, the associated 95% Confidence Interval (CI95%) and trend classification attending to TRIM criteria (TRIM Trend; Pannekoek & Van Strien, 2006a) are shown. AN: Andalusia. AR: Arago...
Data
Results of the Switching Linear Trend model for 92 Dupont’s lark populations in Spain. Wald-tests and associated p-values (p) are shown. For each period, the annual change rate, the associated 95% Confidence Interval (CI95%) and trend classification attending to TRIM criteria (TRIM Trend; Pannekoek and Van Strien 2006a) are shown.
Data
Local extinction events registered on Dupont’s lark populations from 2004 to 2015 per Autonomous Community. The number of males at the first time-point (Nt0) and the first year of the temporal series (t0), are shown. In addition, the year when the population was considered extinct or the second year without detecting the species (ti), is indicated.
Data
Raw data employed in the population trend analysis. The population size per year (from 2004 to 2015) and per Dupont’s lark population (92 populations) is shown. Number -1 indicates the absence of data for a specific year.
Article
Full-text available
Capsule: We describe an effective monitoring protocol for detecting wildlife presence using autonomous recording units (ARUs) under different density scenarios. Aims: To describe an effective protocol for monitoring a night-time singing passerine, the Dupont’s Lark Chersophilus duponti, using ARUs. Methods: We estimate, using both simulations and...
Article
Full-text available
Background Territorial songbirds vocalise intensively before sunrise and then decrease their vocal activity. This creates a communication network that disseminates essential information for both males and females. The function of dawn chorus in birds has been frequently interpreted according to seasonal variation of singing as the breeding season a...
Data
Pearson correlation between the total number of songs and calls uttered per each Dupont’s Lark male for each survey
Data
Summary statistics (Mean ±SE) of nocturnal singing and calling display of male Dupont’s Larks over six periods during the breeding cycle of the years 2013 and 2014 at Rincón de Ademuz (eastern Spain) Start and end time are expressed as the minutes before or later sunrise when the first and the last song or call were produced for each male. Performa...
Article
Full-text available
Delayed plumage maturation occurs in birds when subadult plumage is retained until after the first breeding season. We analysed data from 114 Black Wheatears (Oenanthe leucura), which were trapped during 2014–2016 in southeastern Spain, to explore whether biometric measurements, and more specifically tail pattern, differed among age and sex classes...
Chapter
Full-text available
En el presente estudio se han recopilado las citas de cinco paseriformes palustres escasos en la Comunidad de Madrid con el fin de revisar su estatus reproductor y fenología de migración. Las especies consideradas han sido la buscarla unicolor (Locustella luscinioides), la buscarla pintoja (Locustella naevia), el carricerín cejudo (Acrocephalus pal...
Chapter
Full-text available
La pérdida y deterioro de los humedales naturales han conducido a que las aves acuáticas usen en mayor medida humedales artificiales. En este estudio se describe la comunidad de aves acuáticas en un humedal artificial de Meco (este de la Comunidad de Madrid) durante la primavera de 2014 (abril-junio), a través de censos quincenales. Dicho humedal s...
Chapter
Full-text available
Se ha estudiado la comunidad de aves esteparias reproductora e invernante de la Mesa de Ocaña (Toledo, España Central) con el objetivo de ampliar los conocimientos sobre este grupo de aves. En mayo y noviembre-diciembre de 2010 se realizaron 110 transectos lineales sin ancho de banda de 1 km de longitud, y censos desde vehículos, con el fin de dete...
Conference Paper
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Las aves usan diferentes tipos de señales, tales como la biometría y el plumaje, en un gran número de contextos (búsqueda de pareja, comportamiento territorial, comunicación, etc.). Sin embargo, su función y evolución difiere entre especies y no se conoce por completo. En este trabajo hemos analizado la biometría de 114 collalbas negras (Oenanthe l...
Article
Full-text available
Capsule: The Dupont’s Lark Chersophilus duponti in Iberia has relatively high breeding success in both core and fragmented habitats, so population declines are more likely to be the result of low juvenile or adult survival. Aims: To measure important aspects of the reproductive biology of one of the most endangered and least known larks: the Dupon...
Article
Full-text available
Habitat selection of endangered species in peripheral populations must be considered when designing effective conservation plans, as these populations tend to occupy atypical habitats where species-environment relationships are not well understood. We examined patterns of habitat use in peripheral populations of the endangered Dupont’s Lark Chersop...
Article
Full-text available
Appropriate survey design is essential to estimate population size reliably, especially for endangered species. Dupont's Lark Chersophilus duponti, one of the most endangered passerines in Europe, has been monitored using diverse counting methods. This variation in the methods employed may have a significant effect on the estimates of population si...
Article
Full-text available
We describe the song type repertoire variation and degree of song sharing in three isolated and declining Dupont’s Lark (Chersophilus duponti) populations located close to each other in eastern Spain, studied over two years. We found no differences between sites either in song rate or individual repertoire size. We detected great differences in son...
Article
Full-text available
Se analizan los patrones de distribución y evolución poblacional de las aves acuáticas invernantes en los embalses de Madrid entre 2001 y 2009, y su relación con los parámetros físicos de los embalses (superficie y capacidad) y descriptivos de las poblaciones de aves acuáticas (riqueza y diversidad). Se han encontrado relaciones positivas en los gr...