Pub Date : 2016-12-01DOI: 10.1080/03078698.2016.1260860
Clive Walton
ABSTRACT A previous study suggested that Lesser Redpolls Acanthis cabaret in northern England moult before migration. Redpolls caught on autumn passage at Easter Inch Moss in the central lowlands of Scotland show a pattern of recoveries consistent with a north-to-south movement. Both adult and first-calendar-year Lesser Redpolls of these northern populations were moulting when they passed through Easter Inch Moss during the autumn migration, which continued into October and late November. These results suggest that Lesser Redpolls in northern Britain leave their breeding grounds and start their autumn migration while moult is in progress.
{"title":"Lesser Redpolls Acanthis cabaret undertake post-breeding and post-juvenile moult during autumn movements","authors":"Clive Walton","doi":"10.1080/03078698.2016.1260860","DOIUrl":"https://doi.org/10.1080/03078698.2016.1260860","url":null,"abstract":"ABSTRACT A previous study suggested that Lesser Redpolls Acanthis cabaret in northern England moult before migration. Redpolls caught on autumn passage at Easter Inch Moss in the central lowlands of Scotland show a pattern of recoveries consistent with a north-to-south movement. Both adult and first-calendar-year Lesser Redpolls of these northern populations were moulting when they passed through Easter Inch Moss during the autumn migration, which continued into October and late November. These results suggest that Lesser Redpolls in northern Britain leave their breeding grounds and start their autumn migration while moult is in progress.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"67 1","pages":"107 - 110"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1260860","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-12-01DOI: 10.1080/03078698.2016.1260838
Euan N. Furness, R. Furness
ABSTRACT Although studies of wing length in many bird species show longer wings in adults than in juveniles, and increases in wing length among immature age classes of long-lived birds, evidence for an increase in wing length among adult small passerines is very limited. Previous studies of Blue Tits Cyanistes caeruleus have concluded that adults have longer wing lengths than juveniles but that there is no change in wing length with age of adults, yet the latter conclusion has been based on very limited data. Here we examine wing-length data from a large number of retraps of Blue Tits over a 30-year period at a single site in west Scotland. We found very little evidence for feather wear affecting wing-length measurements during the non-breeding season and, as expected, adults had longer wing lengths than juveniles. However, when comparing individuals caught as both one- and two-year-olds, wing lengths were significantly more likely to increase than decrease. This result has implications for studies of evolutionary biology of Blue Tits, such as survival of individuals in relation to biometrics. It would be interesting to determine whether such age-related increases in wing length are widespread in passerines.
{"title":"Influences of feather wear and age on wing lengths of Blue Tits Cyanistes caeruleus","authors":"Euan N. Furness, R. Furness","doi":"10.1080/03078698.2016.1260838","DOIUrl":"https://doi.org/10.1080/03078698.2016.1260838","url":null,"abstract":"ABSTRACT Although studies of wing length in many bird species show longer wings in adults than in juveniles, and increases in wing length among immature age classes of long-lived birds, evidence for an increase in wing length among adult small passerines is very limited. Previous studies of Blue Tits Cyanistes caeruleus have concluded that adults have longer wing lengths than juveniles but that there is no change in wing length with age of adults, yet the latter conclusion has been based on very limited data. Here we examine wing-length data from a large number of retraps of Blue Tits over a 30-year period at a single site in west Scotland. We found very little evidence for feather wear affecting wing-length measurements during the non-breeding season and, as expected, adults had longer wing lengths than juveniles. However, when comparing individuals caught as both one- and two-year-olds, wing lengths were significantly more likely to increase than decrease. This result has implications for studies of evolutionary biology of Blue Tits, such as survival of individuals in relation to biometrics. It would be interesting to determine whether such age-related increases in wing length are widespread in passerines.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"102 - 106"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1260838","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-12-01DOI: 10.1080/03078698.2016.1298316
R. H. Walker, R. Robinson, D. Leech, D. Moss, C. Barimore, J. Blackburn, L. Barber, G. Clewley, Diana X. de Palacio, M. Grantham, Bridget M. Griffin, Allison J. Kew, S. Schaefer, J. Clark
ABSTRACT This is the 79th annual report of the British Trust for Ornithology’s Ringing Scheme, incorporating the report of the Nest Record Scheme and covering work carried out and data processed in 2015. Constant Effort Sites (CES) data from across Europe, relating to eight common warblers, were analysed to investigate large-scale variation in survival rates and showed that changes in survival outside the breeding season are not a key driver of long-term population trends. Retrapping Adults for Survival (RAS) seabird data sets were reviewed to understand their ability to supplement geographically limited, long-term studies carried out by professionals. Most RAS studies re-encountered sufficient numbers of seabirds to estimate average survival rates; however, only those with re-encounter rates of around 40% were able to detect changes in survival rates efficiently. Over 100,000 nest records, relating to four insectivorous woodland passerines, were used to investigate changes in laying dates in response to temperature. Laying dates advanced by 2.3–4.8 days per °C rise in temperature, suggesting that these species may be able to change their laying dates in response to climate changes, even if the rate of climate change is rapid. Over 10,000 phenological data sets, including laying dates for 37 bird species, were used to look at the mechanisms behind species’ responses to changes in climate. Primary producers and primary consumers advanced timing of breeding more quickly than secondary consumers, potentially leading to a greater mismatch between the timing of breeding in birds (secondary consumers) and their prey availability under future climate-change projections. Data were received for 134 CE sites in 2015. Long-term (1984–2014) population trends derived from the CES data identified five migrant species and four resident species that have decreased significantly in abundance over this period. Abundance of three species decreased significantly in 2015 compared to the five-year mean (2010–14) with Whitethroat Sylvia communis abundance at its lowest since CES monitoring began. There were significant increases in abundance for 12 species, with Goldfinch Carduelis carduelis at its highest since CES monitoring began. Productivity decreased significantly in ten species and increased significantly in three species compared to the five-year mean (2010–14); productivity for Willow Warbler Phylloscopus trochilus was at its lowest since CES began. There were no significant changes in survival in 2015. The total number of active RAS projects increased again in 2015; 190 submissions were received, including data from 23 new projects. Projects were carried out on 57 species, with Pied Flycatcher Ficedula hypoleuca (23 projects), Sand Martin Riparia riparia (15) and House Sparrow Passer domesticus (20) still the most-studied species. The total number of birds ringed in 2015 was just under one million (987,253) and comprised 472,462 first-year birds, 319,230 adul
{"title":"Bird ringing and nest recording in Britain and Ireland in 2015","authors":"R. H. Walker, R. Robinson, D. Leech, D. Moss, C. Barimore, J. Blackburn, L. Barber, G. Clewley, Diana X. de Palacio, M. Grantham, Bridget M. Griffin, Allison J. Kew, S. Schaefer, J. Clark","doi":"10.1080/03078698.2016.1298316","DOIUrl":"https://doi.org/10.1080/03078698.2016.1298316","url":null,"abstract":"ABSTRACT This is the 79th annual report of the British Trust for Ornithology’s Ringing Scheme, incorporating the report of the Nest Record Scheme and covering work carried out and data processed in 2015. Constant Effort Sites (CES) data from across Europe, relating to eight common warblers, were analysed to investigate large-scale variation in survival rates and showed that changes in survival outside the breeding season are not a key driver of long-term population trends. Retrapping Adults for Survival (RAS) seabird data sets were reviewed to understand their ability to supplement geographically limited, long-term studies carried out by professionals. Most RAS studies re-encountered sufficient numbers of seabirds to estimate average survival rates; however, only those with re-encounter rates of around 40% were able to detect changes in survival rates efficiently. Over 100,000 nest records, relating to four insectivorous woodland passerines, were used to investigate changes in laying dates in response to temperature. Laying dates advanced by 2.3–4.8 days per °C rise in temperature, suggesting that these species may be able to change their laying dates in response to climate changes, even if the rate of climate change is rapid. Over 10,000 phenological data sets, including laying dates for 37 bird species, were used to look at the mechanisms behind species’ responses to changes in climate. Primary producers and primary consumers advanced timing of breeding more quickly than secondary consumers, potentially leading to a greater mismatch between the timing of breeding in birds (secondary consumers) and their prey availability under future climate-change projections. Data were received for 134 CE sites in 2015. Long-term (1984–2014) population trends derived from the CES data identified five migrant species and four resident species that have decreased significantly in abundance over this period. Abundance of three species decreased significantly in 2015 compared to the five-year mean (2010–14) with Whitethroat Sylvia communis abundance at its lowest since CES monitoring began. There were significant increases in abundance for 12 species, with Goldfinch Carduelis carduelis at its highest since CES monitoring began. Productivity decreased significantly in ten species and increased significantly in three species compared to the five-year mean (2010–14); productivity for Willow Warbler Phylloscopus trochilus was at its lowest since CES began. There were no significant changes in survival in 2015. The total number of active RAS projects increased again in 2015; 190 submissions were received, including data from 23 new projects. Projects were carried out on 57 species, with Pied Flycatcher Ficedula hypoleuca (23 projects), Sand Martin Riparia riparia (15) and House Sparrow Passer domesticus (20) still the most-studied species. The total number of birds ringed in 2015 was just under one million (987,253) and comprised 472,462 first-year birds, 319,230 adul","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"115 - 159"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1298316","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59906057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-12-01DOI: 10.1080/03078698.2016.1260822
A. D. Fox, T. Balsby
ABSTRACT Individual consumption rates of sunflower Helianthus annuus seeds were measured among five wild, free-living, colour-marked Bullfinches of the large, nominate race (Pyrrhula p. pyrrhula) and 13 individuals of the smaller race (P.p. coccinea) during 68 feeding bouts at a Danish feeding station on six dates between 15 December 2005 and 22 January 2006. Based on results from linear mixed models, large-race Bullfinches were twice as adept (mean 11.95 seeds/min) at dehusking and consuming sunflower seeds compared to small-race birds (5.99 seeds/min). We found no effect of age or sex on consumption rates, or any changes in individual performance over time. The relative inefficiency of foraging by local small-race Bullfinches not only results in nutritional intake rates from the same food source that are lower than for the invasive large race but also may potentially increase predation rates, because of the need for prolonged foraging periods in an environment that exposes them to predators.
摘要:2005年12月15日至2006年1月22日，在丹麦的一个饲养站，测定了5只野生、自由生活、有彩色标记的大红腹雀(Pyrrhula p. Pyrrhula)和13只小红腹雀(P.p. coccinea)在68次饲养中对向日葵Helianthus annuus种子的个体摄取率。基于线性混合模型的结果，大品种牛头雀在剥壳和消耗葵花籽方面的熟练程度(平均11.95粒/分钟)是小品种(5.99粒/分钟)的两倍。我们没有发现年龄或性别对消费率的影响，也没有发现个人表现随时间的变化。当地小品种的红腹红雀觅食效率相对较低，这不仅导致它们从同一食物来源摄取营养的比例低于入侵的大品种，而且还可能潜在地增加捕食率，因为它们需要在一个暴露于捕食者的环境中延长觅食时间。
{"title":"Size does matter: large-race Bullfinches Pyrrhula pyrrhula pyrrhula dehusk sunflower Helianthus annuus seeds at twice the rate of small-race P.p. coccinea individuals","authors":"A. D. Fox, T. Balsby","doi":"10.1080/03078698.2016.1260822","DOIUrl":"https://doi.org/10.1080/03078698.2016.1260822","url":null,"abstract":"ABSTRACT Individual consumption rates of sunflower Helianthus annuus seeds were measured among five wild, free-living, colour-marked Bullfinches of the large, nominate race (Pyrrhula p. pyrrhula) and 13 individuals of the smaller race (P.p. coccinea) during 68 feeding bouts at a Danish feeding station on six dates between 15 December 2005 and 22 January 2006. Based on results from linear mixed models, large-race Bullfinches were twice as adept (mean 11.95 seeds/min) at dehusking and consuming sunflower seeds compared to small-race birds (5.99 seeds/min). We found no effect of age or sex on consumption rates, or any changes in individual performance over time. The relative inefficiency of foraging by local small-race Bullfinches not only results in nutritional intake rates from the same food source that are lower than for the invasive large race but also may potentially increase predation rates, because of the need for prolonged foraging periods in an environment that exposes them to predators.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"101 - 98"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1260822","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-01DOI: 10.1080/03078698.2016.1190617
G. T. Hallgrimsson, H. Helgason, E. S. Pálsdóttir, S. Pálsson
ABSTRACT Gulls are monomorphic in plumage characteristics but show a sexual size dimorphism where males are larger than females. In this study, we use discriminant function analyses (DFA) and generalised linear modelling (GLM) to provide sexing criteria based on morphometrics for adult and fledgling Lesser Black-backed Gulls Larus fuscus in Iceland. Males were significantly larger than females in all variables measured and this was the case for both age classes. For DFA the best sexing model for adults included skull length, bill depth and tarsus length and classified correctly 99.1% of the individuals sampled. For GLM only two variables, skull length and tarsus length, were needed for 100% classification of adult birds. The best sexing model for fledglings included skull length and tarsus length and classified correctly 89.4–91.5% of the individuals sampled, depending on the method. Individual sexing probability was much higher for adults than for fledglings, independent of the method used. However, individual sexing probability for adult birds was higher from applying GLM than from DFA. Higher success of GLM in assigning birds to the correct sex, higher individual sexing probability and more direct methodology to obtain a sexing probability make GLM an appropriate and recommended method for sexing birds.
{"title":"Sexing adult and fledgling Lesser Black-backed Gulls from morphometrics","authors":"G. T. Hallgrimsson, H. Helgason, E. S. Pálsdóttir, S. Pálsson","doi":"10.1080/03078698.2016.1190617","DOIUrl":"https://doi.org/10.1080/03078698.2016.1190617","url":null,"abstract":"ABSTRACT Gulls are monomorphic in plumage characteristics but show a sexual size dimorphism where males are larger than females. In this study, we use discriminant function analyses (DFA) and generalised linear modelling (GLM) to provide sexing criteria based on morphometrics for adult and fledgling Lesser Black-backed Gulls Larus fuscus in Iceland. Males were significantly larger than females in all variables measured and this was the case for both age classes. For DFA the best sexing model for adults included skull length, bill depth and tarsus length and classified correctly 99.1% of the individuals sampled. For GLM only two variables, skull length and tarsus length, were needed for 100% classification of adult birds. The best sexing model for fledglings included skull length and tarsus length and classified correctly 89.4–91.5% of the individuals sampled, depending on the method. Individual sexing probability was much higher for adults than for fledglings, independent of the method used. However, individual sexing probability for adult birds was higher from applying GLM than from DFA. Higher success of GLM in assigning birds to the correct sex, higher individual sexing probability and more direct methodology to obtain a sexing probability make GLM an appropriate and recommended method for sexing birds.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"68 - 73"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1190617","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-01DOI: 10.1080/03078698.2016.1195205
C. D. du Feu, J. Clark, M. Schaub, W. Fiedler, S. Baillie
ABSTRACT The European Union for Bird Ringing (EURING) coordinates bird ringing at a continental scale and operates the EURING Data Bank (EDB) to facilitate large-scale analyses of movements and demography. The EDB contains over 10 million individual encounter records which are summarised on a publicly available website, the EDB index. EURING welcomes applications to analyse these data. Ring-recovery data from the EDB contribute to research on many ecological issues, particularly migration and movements, hunting, mortality causes, disease transmission, population dynamics and dispersal. Recent developments will facilitate the incorporation of comprehensive sets of first-encounter records and local recaptures which are essential for robust quantitative studies of population dynamics and movements. Furthermore, the recent inclusion of fields for moult, measurements and weights within the EURING code will facilitate novel research at a European scale. We expect increasing use of the EDB for quantitative studies of avian demography and movements with high applied value. Wherever possible, this research should also incorporate complementary ecological information. EURING’s immediate priority is the production of a European Migration Atlas that would provide an up-to-date synthesis of the movements of European bird populations, with many direct implications for their conservation.
欧洲鸟鸣联盟(European Union for Bird ring，简称euuring)协调大陆范围内的鸟鸣活动，并运营euuring数据库(EDB)，以促进对鸟鸣活动和人口统计的大规模分析。教育局保存了超过1000万份个人邂逅记录，这些记录汇总在一个公开的网站“教育局索引”上。uring欢迎应用程序来分析这些数据。EDB提供的生态圈恢复数据有助于研究许多生态问题，特别是移徙和移动、狩猎、死亡原因、疾病传播、种群动态和分散。最近的事态发展将有助于纳入综合的首次接触记录和当地重新捕获的情况，这对于对人口动态和流动进行强有力的定量研究是必不可少的。此外，最近将换毛、测量和重量领域纳入欧盟规范，将促进欧洲范围内的新研究。我们预期教育局会越来越多地应用于禽鸟人口统计及迁徙的定量研究，并具有很高的应用价值。在可能的情况下，这项研究还应纳入互补的生态信息。尤林的当务之急是制作《欧洲迁徙地图集》，它将提供欧洲鸟类种群迁徙的最新综合资料，对它们的保护有许多直接影响。
{"title":"The EURING Data Bank – a critical tool for continental-scale studies of marked birds","authors":"C. D. du Feu, J. Clark, M. Schaub, W. Fiedler, S. Baillie","doi":"10.1080/03078698.2016.1195205","DOIUrl":"https://doi.org/10.1080/03078698.2016.1195205","url":null,"abstract":"ABSTRACT The European Union for Bird Ringing (EURING) coordinates bird ringing at a continental scale and operates the EURING Data Bank (EDB) to facilitate large-scale analyses of movements and demography. The EDB contains over 10 million individual encounter records which are summarised on a publicly available website, the EDB index. EURING welcomes applications to analyse these data. Ring-recovery data from the EDB contribute to research on many ecological issues, particularly migration and movements, hunting, mortality causes, disease transmission, population dynamics and dispersal. Recent developments will facilitate the incorporation of comprehensive sets of first-encounter records and local recaptures which are essential for robust quantitative studies of population dynamics and movements. Furthermore, the recent inclusion of fields for moult, measurements and weights within the EURING code will facilitate novel research at a European scale. We expect increasing use of the EDB for quantitative studies of avian demography and movements with high applied value. Wherever possible, this research should also incorporate complementary ecological information. EURING’s immediate priority is the production of a European Migration Atlas that would provide an up-to-date synthesis of the movements of European bird populations, with many direct implications for their conservation.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"1 - 18"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1195205","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-01DOI: 10.1080/03078698.2016.1190615
B. Uher-Koch, Daniel Rizzolo, Kenneth G. Wright, J. Schmutz
ABSTRACT A variety of methods such as night-lighting and lift nets have been used to catch divers (Gavidae), although 24-hour daylight in the Arctic summer and the remote nature of field sites can make the use of these traditional methods impossible. Our research required capture of adult divers at remote locations in northern Alaska. Here we describe a suspended dive-net technique that we used to safely capture territorial White-billed Gavia adamsii and Pacific Divers G. pacifica and that is lightweight and easy to set up. We also were able to capture divers with chicks, and failed breeders, and suggest that this method could be used to catch other territorial aquatic diving birds, especially other diver species.
{"title":"A suspended dive-net technique for catching territorial divers","authors":"B. Uher-Koch, Daniel Rizzolo, Kenneth G. Wright, J. Schmutz","doi":"10.1080/03078698.2016.1190615","DOIUrl":"https://doi.org/10.1080/03078698.2016.1190615","url":null,"abstract":"ABSTRACT A variety of methods such as night-lighting and lift nets have been used to catch divers (Gavidae), although 24-hour daylight in the Arctic summer and the remote nature of field sites can make the use of these traditional methods impossible. Our research required capture of adult divers at remote locations in northern Alaska. Here we describe a suspended dive-net technique that we used to safely capture territorial White-billed Gavia adamsii and Pacific Divers G. pacifica and that is lightweight and easy to set up. We also were able to capture divers with chicks, and failed breeders, and suggest that this method could be used to catch other territorial aquatic diving birds, especially other diver species.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"75 1","pages":"19 - 22"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1190615","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-01DOI: 10.1080/03078698.2016.1197698
Peter Rock, C. J. Camphuysen, J. Shamoun‐Baranes, Viola H. Ross‐Smith, I. Vaughan
ABSTRACT Recent developments in GPS tracking technology allow the movements of bird species to be followed in ever-greater detail. Seabird research is benefiting greatly, due to the challenges of tracking species that often roam widely out at sea. Amongst the gulls, one of the pressing issues is to understand the ecology of the relatively recent urban colonists and how they differ from their counterparts in traditional rural colonies. Here, we present what we believe are the first GPS results from roof-nesting gulls. Four adult Herring Gulls (two males, two females) were fitted with GPS tags in May 2014 in the seaside town of St Ives, Cornwall (breeding colony c 250 pairs), and tracked for c 100 days during the 2014 breeding season. We estimated the home ranges of the four individuals and how their movement behaviour varied through the 24-h period and across the breeding season. The results highlight how variable movement behaviour was among individuals: whilst one bird roamed widely (90% range estimate = 560 km2), heading >50 km offshore and often active at night or roosting at sea, two birds had small ranges (<10 km2), always attended the colony at night and rarely headed more than a few hundred metres offshore, with the fourth displaying intermediate behaviour. All of the birds regularly utilised a few key sites within the agricultural landscape south of St Ives. Whilst this study was too small to allow general conclusions to be drawn about urban Herring Gulls, it reinforces how variable individual behaviour can be amongst the large gulls and will be particularly interesting when applied to a larger sample of birds, especially in big urban gull colonies further inland.
{"title":"Results from the first GPS tracking of roof-nesting Herring Gulls Larus argentatus in the UK","authors":"Peter Rock, C. J. Camphuysen, J. Shamoun‐Baranes, Viola H. Ross‐Smith, I. Vaughan","doi":"10.1080/03078698.2016.1197698","DOIUrl":"https://doi.org/10.1080/03078698.2016.1197698","url":null,"abstract":"ABSTRACT Recent developments in GPS tracking technology allow the movements of bird species to be followed in ever-greater detail. Seabird research is benefiting greatly, due to the challenges of tracking species that often roam widely out at sea. Amongst the gulls, one of the pressing issues is to understand the ecology of the relatively recent urban colonists and how they differ from their counterparts in traditional rural colonies. Here, we present what we believe are the first GPS results from roof-nesting gulls. Four adult Herring Gulls (two males, two females) were fitted with GPS tags in May 2014 in the seaside town of St Ives, Cornwall (breeding colony c 250 pairs), and tracked for c 100 days during the 2014 breeding season. We estimated the home ranges of the four individuals and how their movement behaviour varied through the 24-h period and across the breeding season. The results highlight how variable movement behaviour was among individuals: whilst one bird roamed widely (90% range estimate = 560 km2), heading >50 km offshore and often active at night or roosting at sea, two birds had small ranges (<10 km2), always attended the colony at night and rarely headed more than a few hundred metres offshore, with the fourth displaying intermediate behaviour. All of the birds regularly utilised a few key sites within the agricultural landscape south of St Ives. Whilst this study was too small to allow general conclusions to be drawn about urban Herring Gulls, it reinforces how variable individual behaviour can be amongst the large gulls and will be particularly interesting when applied to a larger sample of birds, especially in big urban gull colonies further inland.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"47 - 62"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1197698","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-01DOI: 10.1080/03078698.2016.1195213
L. Bozó, W. Heim
ABSTRACT In the majority of the Phylloscopus warblers there is no sexual plumage dimorphism and this makes it almost impossible to determine the sex of birds trapped during migration. We analysed a data set of 6287 individuals of seven warbler species ringed at a stopover site at Muraviovka Park in Far Eastern Russia. The wing length showed a bimodal distribution in four species, and decreased during spring migration but increased during autumn migration. We argue that this pattern is caused by sex-specific migration: the larger males face the pressure to reach the breeding grounds earlier, while they stay longer in their territories in autumn.
{"title":"Sex-specific migration of Phylloscopus warblers at a stopover site in Far Eastern Russia","authors":"L. Bozó, W. Heim","doi":"10.1080/03078698.2016.1195213","DOIUrl":"https://doi.org/10.1080/03078698.2016.1195213","url":null,"abstract":"ABSTRACT In the majority of the Phylloscopus warblers there is no sexual plumage dimorphism and this makes it almost impossible to determine the sex of birds trapped during migration. We analysed a data set of 6287 individuals of seven warbler species ringed at a stopover site at Muraviovka Park in Far Eastern Russia. The wing length showed a bimodal distribution in four species, and decreased during spring migration but increased during autumn migration. We argue that this pattern is caused by sex-specific migration: the larger males face the pressure to reach the breeding grounds earlier, while they stay longer in their territories in autumn.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"41 - 46"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1195213","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59905681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-01DOI: 10.1080/03078698.2016.1195209
R. Broughton, P. J. Alker, P. Bellamy, S. Britton, D. Dadam, J. C. Day, Michael Miles, S. Hinsley
ABSTRACT Biometrics are commonly used to compare bird species. For Marsh Tits and Willow Tits in Britain there are few biometric data from birds of known age and sex, despite their value for population analyses in estimating the proportion of males and females in samples. Comparing measurements between the two species could also aid identification and the monitoring of these declining species in Britain. We present biometrics for a large sample of Marsh Tits of known age and sex, and new data for Willow Tits, which act as reliable reference material. Overall, adults of both species were larger than first-years and males were larger than females, but not among first-year Willow Tits. Marsh Tits were slightly larger and heavier than Willow Tits, but Willow Tits had proportionately longer tails. Discriminant analyses produced new equations for separating the species based on wing length and the measurement between the shortest and longest tail feathers. Probabilities were generated for estimating Marsh Tit population structure from samples of ringing data, but there was a greater overlap between sexes in Willow Tit measurements. We conclude by discussing issues of measurement accuracy and consistency in the collection and analysis of biometric data.
{"title":"Comparative biometrics of British Marsh Tits Poecile palustris and Willow Tits P. montana","authors":"R. Broughton, P. J. Alker, P. Bellamy, S. Britton, D. Dadam, J. C. Day, Michael Miles, S. Hinsley","doi":"10.1080/03078698.2016.1195209","DOIUrl":"https://doi.org/10.1080/03078698.2016.1195209","url":null,"abstract":"ABSTRACT Biometrics are commonly used to compare bird species. For Marsh Tits and Willow Tits in Britain there are few biometric data from birds of known age and sex, despite their value for population analyses in estimating the proportion of males and females in samples. Comparing measurements between the two species could also aid identification and the monitoring of these declining species in Britain. We present biometrics for a large sample of Marsh Tits of known age and sex, and new data for Willow Tits, which act as reliable reference material. Overall, adults of both species were larger than first-years and males were larger than females, but not among first-year Willow Tits. Marsh Tits were slightly larger and heavier than Willow Tits, but Willow Tits had proportionately longer tails. Discriminant analyses produced new equations for separating the species based on wing length and the measurement between the shortest and longest tail feathers. Probabilities were generated for estimating Marsh Tit population structure from samples of ringing data, but there was a greater overlap between sexes in Willow Tit measurements. We conclude by discussing issues of measurement accuracy and consistency in the collection and analysis of biometric data.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"31 1","pages":"30 - 40"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03078698.2016.1195209","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59904917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：