Pub Date : 2019-11-26DOI: 10.13157/arla.67.1.2020.sc3
J. Gómez, C. Ramo, Juan A. Canales, I. García, M. Castro, Alejandro Pérez-Hurtado, J. Amat
There are two main methods to extract pigments from avian eggshells. There are those using strong acids (e.g. sulphuric, hydrochloric or formic), that allow for a quantification of pigment concentrations but with which samples are destroyed. Alternatively, there are methods employing weaker acids (e.g. acetic), with which samples are not destroyed, although pigment concentrations may not be quantified and only their presence is detected. In some cases, there may be a need to quantify pigments in samples in which the pigments have already been detected. Here, we assess whether the quantity of pigments extracted from eggshells using a strong acid is affected by previous treatment of eggshells with a weak acid. For this, we used eggshells of Kentish Plovers Charadrius alexandrinus and domestic Japanese Quails Coturnix japonica, and aliquots of individual eggshells treated either with both acids (first applying a weak acid and then a strong acid) or only with the strong acid. Quantities of extracted protoporphyrin and biliverdin (the main eggshell pigments) were lower when using a strong acid after application of a weak acid. However, there were significant positive correlations between the quantities of pigments extracted using the two methods, suggesting that eggshell samples used to determine pigment presence may still be usable to quantify pigment concentrations using a strong acid.—Gomez, J., Ramo, C., Canales, J.A., Garcia, I.M., Castro, M., Perez-Hurtado, A. & Amat, J.A. (2020). A comparative assessment of pigment extraction from avian eggshells using two analytical protocols.
{"title":"A Comparative Assessment of Pigment Extraction from Avian Eggshells Using Two Analytical Protocols","authors":"J. Gómez, C. Ramo, Juan A. Canales, I. García, M. Castro, Alejandro Pérez-Hurtado, J. Amat","doi":"10.13157/arla.67.1.2020.sc3","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.sc3","url":null,"abstract":"There are two main methods to extract pigments from avian eggshells. There are those using strong acids (e.g. sulphuric, hydrochloric or formic), that allow for a quantification of pigment concentrations but with which samples are destroyed. Alternatively, there are methods employing weaker acids (e.g. acetic), with which samples are not destroyed, although pigment concentrations may not be quantified and only their presence is detected. In some cases, there may be a need to quantify pigments in samples in which the pigments have already been detected. Here, we assess whether the quantity of pigments extracted from eggshells using a strong acid is affected by previous treatment of eggshells with a weak acid. For this, we used eggshells of Kentish Plovers Charadrius alexandrinus and domestic Japanese Quails Coturnix japonica, and aliquots of individual eggshells treated either with both acids (first applying a weak acid and then a strong acid) or only with the strong acid. Quantities of extracted protoporphyrin and biliverdin (the main eggshell pigments) were lower when using a strong acid after application of a weak acid. However, there were significant positive correlations between the quantities of pigments extracted using the two methods, suggesting that eggshell samples used to determine pigment presence may still be usable to quantify pigment concentrations using a strong acid.—Gomez, J., Ramo, C., Canales, J.A., Garcia, I.M., Castro, M., Perez-Hurtado, A. & Amat, J.A. (2020). A comparative assessment of pigment extraction from avian eggshells using two analytical protocols.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73960907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-26DOI: 10.13157/arla.67.1.2020.sc5
Emiliano A. Depino, J. I. Areta
Small rails remain poorly known due to their secretive habits and the lack of adequate methods for their study. Here we describe and test a novel method for trapping small rails. The V-netting arrangement comprises two 12m mist-nets placed at ground level, forming a V along previously cleared trails. The bottom of the mist-net is positioned on the ground facing the V inwards and staked to prevent birds from escaping. Birds are lured inside the V using playback and driven into the mist-nets by two people that monitor bird responses and react accordingly. We tested this method across the Neotropical region with six species of Laterallus crakes, capturing 20 individuals in 20 attempts, comprising three Grey-breasted Crakes L. exilis, three Black-banded Crakes L. fasciatus (= Porzana fasciata), five Red-and-white Crakes L. leucopyrrhus, three Rufous-sided Crakes L. melanophaius, four Ruddy Crakes L. ruber and two Rufous-faced Crakes L. xenopterus. Although variation was large, mean capture success resulted in one capture per setup. Our method for capturing small rails in tall and dense habitats provides a new, efficient and safe alternative that is focused, actively monitored and dynamic. It may be profitably used to trap other territorial land birds of dense and tall habitats.—Depino, E.A. & Areta, J.I. (2020). V-netting with playback: an active cost-effective method for trapping small rails.
{"title":"V-Netting with Playback: an Active Cost-Effective Method for Trapping Small Rails","authors":"Emiliano A. Depino, J. I. Areta","doi":"10.13157/arla.67.1.2020.sc5","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.sc5","url":null,"abstract":"Small rails remain poorly known due to their secretive habits and the lack of adequate methods for their study. Here we describe and test a novel method for trapping small rails. The V-netting arrangement comprises two 12m mist-nets placed at ground level, forming a V along previously cleared trails. The bottom of the mist-net is positioned on the ground facing the V inwards and staked to prevent birds from escaping. Birds are lured inside the V using playback and driven into the mist-nets by two people that monitor bird responses and react accordingly. We tested this method across the Neotropical region with six species of Laterallus crakes, capturing 20 individuals in 20 attempts, comprising three Grey-breasted Crakes L. exilis, three Black-banded Crakes L. fasciatus (= Porzana fasciata), five Red-and-white Crakes L. leucopyrrhus, three Rufous-sided Crakes L. melanophaius, four Ruddy Crakes L. ruber and two Rufous-faced Crakes L. xenopterus. Although variation was large, mean capture success resulted in one capture per setup. Our method for capturing small rails in tall and dense habitats provides a new, efficient and safe alternative that is focused, actively monitored and dynamic. It may be profitably used to trap other territorial land birds of dense and tall habitats.—Depino, E.A. & Areta, J.I. (2020). V-netting with playback: an active cost-effective method for trapping small rails.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83974536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-26DOI: 10.13157/arla.67.1.2020.sc4
A. A. Aispuro, Clara Machowetz, M. Illa, G. Gargallo, I. Maggini
The Woodchat Shrike Lanius senator migrates alongside other trans-Saharan passerines but, unlike other shrikes, it is not known to frequently prey on birds. We describe predation, hunting and scavenging of migratory passerines by Woodchat Shrikes at a spring stopover site in the Sahara Desert. Shrikes preyed on six passerine species. Most predated birds were in poorer physical condition than their conspecifics mist-netted at the same site. We suggest Woodchat Shrikes may be more successful at hunting migratory songbirds following a debilitating barrier crossing, which may render prey more susceptible to capture by avian predators.—Aispuro, A.A., Machowetz, C., Illa, M., Gargallo, G. & Maggini, I. (2020). Woodchat Shrike Lanius senator predation on migrating songbirds during a trans-Saharan stopover.
{"title":"Woodchat Shrike Lanius senator Predation on Migrating Songbirds during a Trans-Saharan Stopover","authors":"A. A. Aispuro, Clara Machowetz, M. Illa, G. Gargallo, I. Maggini","doi":"10.13157/arla.67.1.2020.sc4","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.sc4","url":null,"abstract":"The Woodchat Shrike Lanius senator migrates alongside other trans-Saharan passerines but, unlike other shrikes, it is not known to frequently prey on birds. We describe predation, hunting and scavenging of migratory passerines by Woodchat Shrikes at a spring stopover site in the Sahara Desert. Shrikes preyed on six passerine species. Most predated birds were in poorer physical condition than their conspecifics mist-netted at the same site. We suggest Woodchat Shrikes may be more successful at hunting migratory songbirds following a debilitating barrier crossing, which may render prey more susceptible to capture by avian predators.—Aispuro, A.A., Machowetz, C., Illa, M., Gargallo, G. & Maggini, I. (2020). Woodchat Shrike Lanius senator predation on migrating songbirds during a trans-Saharan stopover.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80562266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-30DOI: 10.13157/arla.67.1.2020.ra1
J. Avilés, Á. Cruz-Miralles, A. Ducrest, C. Simon, A. Roulin, K. Wakamatsu, D. Parejo
Summary. Melanin-based colorations in birds constitute a paradigm for the study of the molecular basis of phenotypic variation. Variation in the melanocortin-1 receptor (MCR1) gene, a key regulator of melanin synthesis in feather melanocytes, can lead to changes in the production of melanin and hence in feather colour. Here we investigate the proximate mechanisms behind colour plumage polymorphism in the Eurasian Scops-owl Otus scops, a species showing pronounced variation in the degree of redness. Although eumelanin pigment was three times more abundant than pheomelanin pigments, the degree of plumage redness was more strongly associated with the amount of pheomelanin than eumelanin pigments. We detected only one synonymous substitution and one non-synonymous substitution in MC1R which were, however, not associated with variation in plumage coloration. Redness variation in Eurasian Scops-Owls is primarily due to variation in pheomelanin, and to genes or regulatory elements other than MCR1. —Avilés, J.M., Cruz-Miralles, A., Ducrest, A.-L., Simon, C., Roulin, A., Wakamatsu, K. & Parejo, D. (2020). Redness variation in the Eurasian Scops-owl Otus scops is due to pheomelanin but is not associated with variation in the melanocortin-1 receptor gene (mc1r). Ardeola, 67: 3-13.
{"title":"Redness Variation in the Eurasian Scops-Owl Otus scops is Due to Pheomelanin But is Not Associated with Variation in the Melanocortin-1 Receptor Gene (MC1R)","authors":"J. Avilés, Á. Cruz-Miralles, A. Ducrest, C. Simon, A. Roulin, K. Wakamatsu, D. Parejo","doi":"10.13157/arla.67.1.2020.ra1","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.ra1","url":null,"abstract":"Summary. Melanin-based colorations in birds constitute a paradigm for the study of the molecular basis of phenotypic variation. Variation in the melanocortin-1 receptor (MCR1) gene, a key regulator of melanin synthesis in feather melanocytes, can lead to changes in the production of melanin and hence in feather colour. Here we investigate the proximate mechanisms behind colour plumage polymorphism in the Eurasian Scops-owl Otus scops, a species showing pronounced variation in the degree of redness. Although eumelanin pigment was three times more abundant than pheomelanin pigments, the degree of plumage redness was more strongly associated with the amount of pheomelanin than eumelanin pigments. We detected only one synonymous substitution and one non-synonymous substitution in MC1R which were, however, not associated with variation in plumage coloration. Redness variation in Eurasian Scops-Owls is primarily due to variation in pheomelanin, and to genes or regulatory elements other than MCR1. —Avilés, J.M., Cruz-Miralles, A., Ducrest, A.-L., Simon, C., Roulin, A., Wakamatsu, K. & Parejo, D. (2020). Redness variation in the Eurasian Scops-owl Otus scops is due to pheomelanin but is not associated with variation in the melanocortin-1 receptor gene (mc1r). Ardeola, 67: 3-13.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75230377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-07DOI: 10.13157/arla.67.1.2020.sc2
J. Alonso, C. Palacín, I. Abril‐Colón
Lanzarote island, in the Canary archipelago, is the main stronghold of the Canarian subspecies of the African Houbara Bustard Chlamydotis undulata fuertaventurae. The size of this population has been estimated several times in recent decades, based on extrapolations of bird densities obtained in small sampling areas. Here we present the results of the first complete census of the Houbara population of this island, based on car transects combined with frequent and prolonged scanning stops, and carried out during the mating season, in January-February 2018. Based on a count of 370 birds (161 males, 209 females) we estimate a total population of 440-452 Houbara Bustards on the island. For the first time, a sex-ratio figure was obtained for this species: 1.41 females per male. The annual production of juveniles was recorded for three years and varied between 5.83 and 19.57 juveniles per hundred females. The census method used in this study is proposed as an alternative to the line transects used previously, since it avoids possible methodological flaws that probably overestimate the population. The present method also enables sex ratio and productivity to be determined, and it established the locations of most displaying males. These are important parameters for evaluating the conservation status and reproductive performance of this endangered subspecies of the African Houbara.—Alonso, J.C., Palacin, C. and Abril-Colon, I. (2020). The Lanzarote population of the African Houbara Chlamydotis undulata fuertaventurae: census, sex ratio, productivity, and a proposed new survey method. Ardeola, 67: XX-XX.
{"title":"The Lanzarote Population of the African Houbara Chlamydotis undulata fuertaventurae: Census, Sex Ratio, Productivity, and a Proposed New Survey Method","authors":"J. Alonso, C. Palacín, I. Abril‐Colón","doi":"10.13157/arla.67.1.2020.sc2","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.sc2","url":null,"abstract":"Lanzarote island, in the Canary archipelago, is the main stronghold of the Canarian subspecies of the African Houbara Bustard Chlamydotis undulata fuertaventurae. The size of this population has been estimated several times in recent decades, based on extrapolations of bird densities obtained in small sampling areas. Here we present the results of the first complete census of the Houbara population of this island, based on car transects combined with frequent and prolonged scanning stops, and carried out during the mating season, in January-February 2018. Based on a count of 370 birds (161 males, 209 females) we estimate a total population of 440-452 Houbara Bustards on the island. For the first time, a sex-ratio figure was obtained for this species: 1.41 females per male. The annual production of juveniles was recorded for three years and varied between 5.83 and 19.57 juveniles per hundred females. The census method used in this study is proposed as an alternative to the line transects used previously, since it avoids possible methodological flaws that probably overestimate the population. The present method also enables sex ratio and productivity to be determined, and it established the locations of most displaying males. These are important parameters for evaluating the conservation status and reproductive performance of this endangered subspecies of the African Houbara.—Alonso, J.C., Palacin, C. and Abril-Colon, I. (2020). The Lanzarote population of the African Houbara Chlamydotis undulata fuertaventurae: census, sex ratio, productivity, and a proposed new survey method. Ardeola, 67: XX-XX.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75200674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-30DOI: 10.13157/arla.67.1.2020.sc1
L. Bozó, T. Csörgő, Y. Anisimov
espanolLa migracion de paseriformes siberianos se conoce poco, aunque el numero de estudios se ha incrementado recientemente. No obstante, debido a la ausencia de recuperaciones de ejemplares anillados a lo largo de la ruta migratoria del este de Asia, y a la limitacion debida al tamano para el uso de geolocalizadores, los estudios de las rutas de migracion de pequenos mosquiteros son escasos. El unico metodo prometedor es la estimacion de las distancias de vuelo usando parametros biologicos para identificar las distancias de migracion y localizar posibles escalas a lo largo de la ruta. El objetivo de este estudio fue estimar las distancias de vuelo de los migradores mosquitero de Schwarz Phylloscopus schwarzi, mosquitero sombrio P. fuscatus y mosquitero de Pallas P. proregulus en una escala de migracion adyacente al lago Baikal, Rusia. Se usaron para los analisis el peso corporal, el indice de grasa y la longitud del ala de 809 individuos capturados con redes japonesas durante los periodos de migracion otonal entre 2012 y 2017. Nuestros resultados muestran que el peso corporal, pero no la longitud del ala, se incremento significativamente entre los individuos de acuerdo a los indices de grasa en todas las especies de estudio. Las distancias estimadas de vuelo del mosquitero de Pallas (724 km) y del Mosquitero de Schwarz (510 km), asi como el numero de escalas que se calculan para estas especies, fueron similares a las que se han encontrado en otras partes de Siberia. En cambio, se estimo que los mosquiteros sombrios capturados en nuestra area de estudio tenian menores distancias de vuelo (217 km) y por tanto deberian parar mas frecuentemente en su ruta hacia sus areas de invernada. EnglishThe migration of Siberian passerines is little known, although the number of studies has been increasing recently. However, due to the lack of recoveries of ringed individuals along the East Asian migratory flyway, and the size-dependent limitation on the use of geolocators, studies of the migration routes of small leaf-warblers are scarce. The only promising method is flight range estimation by using biometric parameters to identify migration distances and locate possible stopover sites along the flyway. The aim of this study was to estimate the flight ranges of migrant Radde's warblers Phylloscopus schwarzi, Dusky Warblers P. fuscatus and Pallas's Leaf-warblers P. proregulus at a stopover site next to Lake Baikal, Russia. For the analyses, we used the body mass, fat score and wing-length data of 809 individuals, which were trapped with mist-nets during the autumn migration periods between 2012 and 2017. Our results show that body mass, but not wing length, increased significantly among individuals with increasing fat scores in all study species. The estimated flight ranges of Pallas's Leaf-warbler (724km) and Radde's Warbler (510km) were similar to those of birds studied in a different part of Siberia, and the number of calculated stopovers was also similar b
西伯利亚雀形目的迁徙鲜为人知，尽管最近研究的数量有所增加。然而，由于在东亚迁徙路线上缺乏环状标本的恢复，以及地理定位器的大小限制，对小型蚊帐迁徙路线的研究很少。唯一有希望的方法是利用生物学参数估计飞行距离，以确定迁徙距离，并确定沿途可能的中途停留点。本研究的目的是在俄罗斯贝加尔湖附近的迁徙规模上估计迁徙的Schwarz Phylloscopus schwarzi、fuscatus和Pallas P. proregulus的飞行距离。利用2012 - 2017年季节性迁徙期间用日本渔网捕获的809只个体的体重、脂肪指数和翼长进行分析。我们的研究结果表明，根据所有研究物种的脂肪指数，个体的体重(而不是翅膀长度)显著增加。帕拉斯蚊帐(724公里)和施瓦茨蚊帐(510公里)的估计飞行距离，以及这些物种的中途停留次数，与在西伯利亚其他地区发现的相似。然而，据估计，在我们的研究区域捕获的黑色蚊帐的飞行距离较短(217公里)，因此在前往越冬地区的途中应该更频繁地停留。EnglishThe migration of Siberian passerines is小的成熟度,但the number of studies has been加大惧。但是，由于东亚迁徙路线上没有圈养个体的恢复情况，而且地理定位器的使用受到大小的限制，关于小叶林迁徙路线的研究很少。唯一有希望的方法是利用生物特征参数估计飞行距离，以确定飞行路线上可能的中途停留地点。= =地理= =根据美国人口普查，这个县的总面积为，其中土地和(2.641平方公里)水。为了进行分析，我们使用了809名个体的体重、脂肪评分和翼长数据，这些个体在2012年至2017年秋季迁移期间被雾网困住。= =地理= =根据美国人口普查，这个县的总面积为，其中土地和(1.1%)水。帕拉斯的叶莺(724公里)和拉德的叶莺(510公里)的估计飞行范围与西伯利亚不同地区的鸟类相似，计算出的中途停留次数也相似。In对比,lorraine Dusky Warblers受困at our study site的to fly与distances (217km)距离不足,因此必须stopped have more频繁on their way to the wintering球场。
{"title":"Estimation of Flight Range of Migrant Leaf-Warblers at Lake Baikal","authors":"L. Bozó, T. Csörgő, Y. Anisimov","doi":"10.13157/arla.67.1.2020.sc1","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.sc1","url":null,"abstract":"espanolLa migracion de paseriformes siberianos se conoce poco, aunque el numero de estudios se ha incrementado recientemente. No obstante, debido a la ausencia de recuperaciones de ejemplares anillados a lo largo de la ruta migratoria del este de Asia, y a la limitacion debida al tamano para el uso de geolocalizadores, los estudios de las rutas de migracion de pequenos mosquiteros son escasos. El unico metodo prometedor es la estimacion de las distancias de vuelo usando parametros biologicos para identificar las distancias de migracion y localizar posibles escalas a lo largo de la ruta. El objetivo de este estudio fue estimar las distancias de vuelo de los migradores mosquitero de Schwarz Phylloscopus schwarzi, mosquitero sombrio P. fuscatus y mosquitero de Pallas P. proregulus en una escala de migracion adyacente al lago Baikal, Rusia. Se usaron para los analisis el peso corporal, el indice de grasa y la longitud del ala de 809 individuos capturados con redes japonesas durante los periodos de migracion otonal entre 2012 y 2017. Nuestros resultados muestran que el peso corporal, pero no la longitud del ala, se incremento significativamente entre los individuos de acuerdo a los indices de grasa en todas las especies de estudio. Las distancias estimadas de vuelo del mosquitero de Pallas (724 km) y del Mosquitero de Schwarz (510 km), asi como el numero de escalas que se calculan para estas especies, fueron similares a las que se han encontrado en otras partes de Siberia. En cambio, se estimo que los mosquiteros sombrios capturados en nuestra area de estudio tenian menores distancias de vuelo (217 km) y por tanto deberian parar mas frecuentemente en su ruta hacia sus areas de invernada. EnglishThe migration of Siberian passerines is little known, although the number of studies has been increasing recently. However, due to the lack of recoveries of ringed individuals along the East Asian migratory flyway, and the size-dependent limitation on the use of geolocators, studies of the migration routes of small leaf-warblers are scarce. The only promising method is flight range estimation by using biometric parameters to identify migration distances and locate possible stopover sites along the flyway. The aim of this study was to estimate the flight ranges of migrant Radde's warblers Phylloscopus schwarzi, Dusky Warblers P. fuscatus and Pallas's Leaf-warblers P. proregulus at a stopover site next to Lake Baikal, Russia. For the analyses, we used the body mass, fat score and wing-length data of 809 individuals, which were trapped with mist-nets during the autumn migration periods between 2012 and 2017. Our results show that body mass, but not wing length, increased significantly among individuals with increasing fat scores in all study species. The estimated flight ranges of Pallas's Leaf-warbler (724km) and Radde's Warbler (510km) were similar to those of birds studied in a different part of Siberia, and the number of calculated stopovers was also similar b","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87730130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-24DOI: 10.13157/arla.66.2.2019.br
José Luis Copete
La Sección Bibliográfica de Ardeola publica reseñas breves de publicaciones recibidas en la biblio-teca de SEO/BirdLife. Estas reseñas se realizan desinteresadamente por un conjunto de colaboradores. Las reseñas son normalmente solicitadas por los editores a los colaboradores, aunque otras adicionales pueden ser consideradas para su publicación. Las reseñas expresan las opiniones de los revisores, de modo que no reflejan necesariamente la opinión de los editores o de SEO/BirdLife. This section reviews publications received by and deposited in the SEO/BirdLife library. Most reviews are solicited by the editors from individual contributors but additional reviews are always most welcome. Reviews express the subjective opinions of individual reviewers. As such, they do not necessarily reflect those of the editors or any official policy of SEO/BirdLife.
Ardeola的书目部分发布SEO/BirdLife图书馆收到的出版物的简要评论。这些评论是由一群合作者无私地完成的。评论通常是由编辑从贡献者那里要求的，尽管额外的评论可能会被考虑出版。评论表达的是评论者的观点，所以它们不一定反映编辑或SEO/BirdLife的观点。本节回顾SEO/BirdLife图书馆收到和保存的出版物。Most反革命solicited by the editors from个人重要的作用,但额外的反革命are always Most welcome。评论表达个人评论者的主观意见。因此，它们不一定反映编辑或任何官方SEO/BirdLife政策。
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Pub Date : 2019-07-18DOI: 10.13157/arla.66.2.2019.on
B. Molina, J. Prieta, Juan Antonio Lorenzo (Canarias), Y. C. López-Jurado (Baleares)
RESUMEN. En este informe se ofrece información sobre 126 especies que se reparten por toda la geografía nacional. Se hace especial esfuerzo en 35 especies escasas o que se presentaron de forma puntual en el año 2018, para las que se muestra su distribución espacio-temporal mediantes mapas y gráficas que recogen el número de citas que proporcionan información sobre su patrón de presencia (véanse Molina et al., 2017, 2018 y 2019). Algunos casos corresponden a especies retiradas de la lista de aves raras recientemente (véanse Rouco et al., 2018; Gil-Velasco et al., 2018, Gutiérrez, 2019; Reservoir Birds, 2019). Se actualiza la secuencia taxonómica de acuerdo con la nueva lista patrón de las Aves de España (Rouco et al., 2019).
摘要。该报告提供了分布在全国各地的126种物种的信息。特别强调了努力35物种稀缺或及时提出2018年,以显示其分发的mediantes所采集的地图和图表提供的信息数量存在模式(见Molina et al ., 2017年、2018年和2019年)。一些案例涉及最近从稀有鸟类名单中删除的物种(见Rouco et al.， 2018;吉尔-贝拉斯科等人，2018,gutierrez, 2019;《水鸟》，2019)。根据西班牙鸟类新模式名录(Rouco et al.， 2019)更新了分类序列。
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Pub Date : 2019-07-01DOI: 10.13157/arla.66.2.2019.ra6
M. Lopes, D. G. Pereira, A. Afonso, Fátima Melo
Summary. The relative abundance of the Azorean Buzzard Buteo buteo rothschildi, both temporally and spatially, was assessed to determine its land use preferences and to support its conservation. The main aims were to compare its relative abundance between years, islands and localities and to relate these to land use in the context of habitat changes. Randomly selected plots were surveyed using two sampling methods: strip transect and point counts, to record any buzzards seen during the breeding season and to assess land use characteristics. The buzzards were most numerous on the largest island (São Miguel), and least numerous on the smallest one (Graciosa), as expected. However, we did not find significant differences in abundance among localities in Graciosa or between years in both islands. We only found local variation in abundance on S. Miguel. The overall population stability clearly favours the conservation of this Azorean endemic subspecies. Finally, we found that buzzards avoid industrial areas, urbanisation, natural vegetation and agricultural land, a finding that should be kept in mind by policymakers. These results may be used for landscape planning and management by authorities. There are several regional Management Plans with a spatial dimension but for land use classification the Municipal Master Plans have the discretionary power to classify urban and rural areas. Therefore, this information should be integrated into the decision process of the local classification actions. Future studies should include further habitat variables to assess their relationships with buzzard abundance, but also to extend the analyses to the remaining Azorean Islands in order to understand more deeply how this insular raptor responds to habitat changes. The results of these studies should strengthen law enforcement on land use sustainability and help to promote awareness among managers, landowners, stakeholders and the general public. —Lopes, M., Pereira, D.G., Afonso, A. and Melo, F. (2019). Relative abundance of the Azorean Buzzard Buteo buteo rothschildi and its responses to land use. Ardeola, 66: 343-360.
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Pub Date : 2019-06-07DOI: 10.13157/arla.66.2.2019.ra5
O. Marín-Gómez, I. MacGregor‐Fors
Summary. Urbanisation poses important challenges for animal communication. Avian dawn choruses are a prominent component of urban soundscapes and have received attention in recent urban ecology studies. Current evidence based on comparisons of urban and non-urban sites suggest that urbanisation is associated with earlier dawn chorus singing activity. However, this phenomenon remains mainly unexplored in tropical cities. We here assessed dawn chorus onset and peak times in two contrasting conditions of the urbanisation intensity gradient (i.e., intra-urban and peri-urban forested areas) of a Neotropical city, Xalapa in Mexico, assessing relationships with noise at sunrise and artificial light at night. We found no differences in dawn chorus onset or singing peak times when contrasting intra- and peri-urban areas. However, we found non-significant trends for earlier chorus onsets and peak times with increasing noise levels. Our results show no relationship between artificial light at night and dawn chorus timing, adding evidence to recent studies showing that light pollution does not seem to be determinant in the dawn choruses of tropical birds. Further research is needed to include a wider array of urbanisation conditions and drivers of the singing routines of urban tropical birds. —Marín-Gómez, O.H. & MacGregor-Fors, I. (2019). How early do birds start chirping? Dawn chorus onset and peak times in a Neotropical city. Ardeola, 66: 327-341.
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