IF 0.4 4区生物学

Ardea Pub Date : 2022-02-11 DOI: 10.5253/arde.v110i1.a6

P. Liu, Meng Lai, Mingjie Wang, Yuehua Sun

引用次数: 3

Semi-Automated Counts on Drone Imagery of Breeding Seabirds Using Free Accessible Software 使用免费可访问软件对繁殖海鸟的无人机图像进行半自动计数

IF 0.4 4区生物学

Ardea Pub Date : 2022-02-11 DOI: 10.5253/arde.v110i1.a7

Alejandro Corregidor-Castro, R. Valle

{"title":"Semi-Automated Counts on Drone Imagery of Breeding Seabirds Using Free Accessible Software","authors":"Alejandro Corregidor-Castro, R. Valle","doi":"10.5253/arde.v110i1.a7","DOIUrl":"https://doi.org/10.5253/arde.v110i1.a7","url":null,"abstract":"Long-term monitoring of breeding seabirds is fundamental for assessing the conservation status of their populations. Whereas traditional monitoring is often time consuming and has disadvantages, such as observer bias or disturbance to the breeding grounds, the use of uncrewed aerial vehicles (UAVs or drones) has proven to be an efficient alternative by allowing non-invasive monitoring of inaccessible areas. Nonetheless, the use of drones for monitoring wild populations brings forth a new challenge, namely the handling of large amounts of data (images), usually negating the efficiency of the previous steps. Diverse methodologies have been developed to deal with this issue, but they usually involve the use of commercial software, that reduces the accessibility of users with limited resources. We tested if the popular free software ImageJ could compete in terms of efficiency (i.e. accuracy and processing time) with other commercial software. We obtained similar values of agreement between manual and semiautomated total counts of individuals (99.1%), reducing the analysis duration fivefold. In addition, we propose a correction factor in the detection of incubating individuals based on the assessment of the individual behaviour of 10% of the birds present in each colony. Following this correction, we were able to estimate the total number of incubating birds with a 103.5% agreement with manual counts, reducing the time invested up to threefold. Thus, we show support for the use of free software (ImageJ) as a good low-cost alternative for users of drone imagery in assessing breeding birds and as a conservation tool.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"110 1","pages":"89 - 97"},"PeriodicalIF":0.4,"publicationDate":"2022-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46581018","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}

引用次数: 3

Warmer Winters Increase the Breeding Success of the Goosander in the Pomeranian Lake District in Poland 温暖的冬季增加了波兰波美拉尼亚湖区鹅的繁殖成功率

IF 0.4 4区生物学

Ardea Pub Date : 2022-02-11 DOI: 10.5253/arde.v110i1.a3

D. Marchowski, Adam Mohr, Ł. Ławicki, Ł. Jankowiak

{"title":"Warmer Winters Increase the Breeding Success of the Goosander in the Pomeranian Lake District in Poland","authors":"D. Marchowski, Adam Mohr, Ł. Ławicki, Ł. Jankowiak","doi":"10.5253/arde.v110i1.a3","DOIUrl":"https://doi.org/10.5253/arde.v110i1.a3","url":null,"abstract":"Northern Hemisphere species generally respond to global warming by withdrawing from the southern margins of their distributions and shifting their breeding sites northwards. However, the situation regarding the breeding populations of Goosanders Mergus merganser merganser in Europe appears to be paradoxical: in many places, an increase in the breeding population and range extension have been documented. We studied the breeding biology of this species during the breeding seasons of 1987–1996. We show that the breeding success of a Goosander population breeding in Northern Poland was higher following winters when the ice cover disappeared earlier. There was a significant positive relationship between the disappearance of ice cover and the clutch initiation date, and the breeding success of early broods was higher. The overall mean clutch initiation date was 13 April ± 15 days (SD). The yearly means of clutch initiation dates varied from the beginning of April to the beginning of May. It seems likely that, among other factors, the Goosander's adaptability in terms of the timing of breeding may be partially responsible for the expansion of the species into new areas in the last 30 years.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"110 1","pages":"31 - 40"},"PeriodicalIF":0.4,"publicationDate":"2022-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43611965","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}

引用次数: 2

Effects of Year and Box Size on Construction of Eurasian Nuthatch Sitta europaea Nests 年份和箱型大小对欧亚nuthech Sitta europaea巢筑的影响

IF 0.4 4区生物学

Ardea Pub Date : 2022-02-02 DOI: 10.5253/arde.v110i1.a5

K. Briggs, D. Deeming

{"title":"Effects of Year and Box Size on Construction of Eurasian Nuthatch Sitta europaea Nests","authors":"K. Briggs, D. Deeming","doi":"10.5253/arde.v110i1.a5","DOIUrl":"https://doi.org/10.5253/arde.v110i1.a5","url":null,"abstract":"Studying nest construction provides insight into the functional and ecological aspects of this key behaviour of avian reproductive biology. Studies have shown that passerines construct nests out of a range of different materials, but the number of species represented in the literature remains low. This study examined nests constructed by the Eurasian Nuthatch Sitta europaea in nestboxes at various sites in North West England over the period 2011–2020. Nests were collected and weighed after breeding to quantify the materials used by the birds in order to determine whether there were any differences in nest construction behaviour among years. The study also allowed for the comparison of nests built in standard and large nestboxes. Nuthatches used mud to plaster the inside and outside of the nestbox; however, they relied heavily on bark flakes (84% of nest mass), but also included wood chips and leaves to construct the nest. Bark pieces were taken from Common Hazel Corylus avellana, Yew Taxus baccata or Scots Pine Pinus sylvestris, depending on availability in the immediate area around the nestbox, although Hazel bark was the preferred material. There was little effect of sample year on nest composition except for an increase in wood chips over the sample period. Thermal and hydrological properties of the bark flakes did not depend on the tree species. Nuthatches nesting in large nestboxes produced heavier nests, but this did not affect their reproductive success, which implies that the energy required for nest construction does not necessarily impose such an excessive burden on breeding birds that it adversely affects their fitness.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"110 1","pages":"61 - 74"},"PeriodicalIF":0.4,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45156571","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}

引用次数: 4

Foraging Behaviour of the Eurasian Three-Toed Woodpecker Picoides tridactylus in Its Peak Abundance After Wildfire 野火后欧亚三趾啄木鸟Picoides tridactylus丰度高峰时的觅食行为

IF 0.4 4区生物学

Ardea Pub Date : 2022-02-02 DOI: 10.5253/arde.v110i1.a2

Martijn Versluijs, G. Mikusiński, Jean-Michel Roberge

{"title":"Foraging Behaviour of the Eurasian Three-Toed Woodpecker Picoides tridactylus in Its Peak Abundance After Wildfire","authors":"Martijn Versluijs, G. Mikusiński, Jean-Michel Roberge","doi":"10.5253/arde.v110i1.a2","DOIUrl":"https://doi.org/10.5253/arde.v110i1.a2","url":null,"abstract":"In the boreal biome, forest fires are the most important natural disturbance influencing tree substrate availability and quality for a range of specialized species. This includes the Eurasian Three-toed Woodpecker Picoides tridactylus, which is known to promptly utilize burned forest habitats. However, there are no studies addressing the foraging behaviour of this woodpecker in forests affected by wildfire. Such knowledge could assist the development of efficient post-fire management strategies which are in line with biodiversity conservation objectives. This study describes the foraging behaviour of the Eurasian Three-toed Woodpecker during the breeding season in a forest area of 13,100 ha in southcentral Sweden affected by a major wildfire in 2014. During the second breeding season after fire, we used instantaneous sampling where we observed the foraging behaviour of 28 individuals during a total of 1681 observation minutes. Our results suggest that Norway Spruce Picea abies and larger diameter trees (DBH > 25 cm) are important foraging substrates. However, data on time spent foraging on the different substrates suggest that Scots Pines Pinus sylvestris also are important. In particular, we identified the importance of the root collars, where excavation into sapwood was the main foraging method. Our study was performed during a clearly visible peak of Eurasian Three-toed Woodpecker abundance and this may suggest that the level of food resources available was very high which led to observed foraging patterns not necessarily observed in other types of habitats.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"110 1","pages":"75 - 88"},"PeriodicalIF":0.4,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46941987","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}

引用次数: 4

Within- and between-Year Variation in the Presence of Individually Marked Ruff Calidris pugnax at a Stopover Site during Northward Migration 向北迁移期间在中途停留点存在单独标记的Ruff Calidris pugnax的年内和年间变化

IF 0.4 4区生物学

Ardea Pub Date : 2022-02-02 DOI: 10.5253/arde.v110i1.a1

Raf Vervoort, Lucie E. Schmaltz, J. Hooijmeijer, Y. Verkuil, B. Kempenaers, T. Piersma

{"title":"Within- and between-Year Variation in the Presence of Individually Marked Ruff Calidris pugnax at a Stopover Site during Northward Migration","authors":"Raf Vervoort, Lucie E. Schmaltz, J. Hooijmeijer, Y. Verkuil, B. Kempenaers, T. Piersma","doi":"10.5253/arde.v110i1.a1","DOIUrl":"https://doi.org/10.5253/arde.v110i1.a1","url":null,"abstract":"Ruffs Calidris pugnax migrate from wintering areas in West-Africa and Europe to breeding grounds in northern Eurasia, using stopover sites along the way. At one such stopover site in southwest Friesland (53°N, The Netherlands), we studied variation in the timing of individual stopover based on 6474 Ruffs colour-ringed in 2004–2012. 43% of males and 22% of females were recorded in the study area in March–May the years following marking. Minimal stopover duration of returning individuals showed substantial within-year heterogeneity. We distinguished two classes: (1) ‘transient’ individuals were observed only on a single day in the study area within a season (51% of observed males and 79% of females), and (2) ‘staging’ individuals were observed on multiple days. We observed two seasonal peaks in the presence of transient Ruffs, typically coinciding with the peak of arrival and departure of staging birds. Males known to winter in Europe were more likely to be observed in the study area and arrived earlier than males of unknown winter origin (3.1 days and 3.7 days earlier for transient and staging males, respectively), but departure was unrelated to winter origin. Staging and transient females arrived later than males. Between-year repeatability of individual behaviour was low, and individuals did not significantly advance their arrival date over the course of years, in contrast with a pattern of shifting arrival dates at the population level. The observation that a large proportion of Ruffs visit southwest Friesland for only a short stop suggests that many individuals rely on other sites for moulting and refuelling during spring migration. Resightings of marked individuals elsewhere in western Europe indicated that these sites are largely located between 51° and 54°N. Thus, during spring migration, Ruffs marked in southwest Friesland displayed high between- and within-individual variation in minimal stopover duration.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"110 1","pages":"41 - 59"},"PeriodicalIF":0.4,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43956877","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}

引用次数: 1

Presence of Common Kingfisher on the Coast: The Potential Importance of Shrimp as Prey in Marine Habitats 海岸上常见翠鸟的存在:虾在海洋栖息地中作为猎物的潜在重要性

IF 0.4 4区生物学

Ardea Pub Date : 2021-12-03 DOI: 10.5253/arde.v109i3.a11

Rafael Romero-Suances

{"title":"Presence of Common Kingfisher on the Coast: The Potential Importance of Shrimp as Prey in Marine Habitats","authors":"Rafael Romero-Suances","doi":"10.5253/arde.v109i3.a11","DOIUrl":"https://doi.org/10.5253/arde.v109i3.a11","url":null,"abstract":"The feeding ecology and distribution of the Common Kingfisher Alcedo atthis has been extensively studied during the breeding season in European freshwater habitats, but there is much less known about the ecology of this species in marine and brackish habitats. This study aims to (1) document the presence of Common Kingfishers in marine habitats of Galicia (NW Spain), based on a database of bird sightings collected in mainland Galicia (2004–2020) and on the Cíes Islands (Coast of Galicia; 2008–2019), and (2) study their diet in marine habitats, analyzing 17 pellets collected during autumn and winter in a coastal salt lagoon on the Cíes Islands. During autumn and winter, the number of observations of the species in mainland Galicia were higher in marine habitats than in freshwater habitats (χ21 = 10.88, P < 0.001). Moreover, Common Kingfishers visit the Cíes Islands mostly during autumn and winter (98.6% of observations). Both datasets show that marine habitats are very important for wintering birds. In the coastal lagoon on the Cíes Islands, the Common Prawn Palaemon serratus was the most frequent prey (41.7%), accounting for the highest percentage of the total biomass (68%); much more than the second most frequent prey, gobies (Gobiidae; 35.5%). This finding is exceptional in Europe, since only a few studies report shrimp as a prey item for Common Kingfishers, probably due to the lack of data from marine habitats during winter.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"109 1","pages":"258 - 264"},"PeriodicalIF":0.4,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45429540","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}

引用次数: 1

Stress and Body Condition Predict Haemosporidian Parasitaemia in Birds from Cerrado, Southeastern Brazil 压力和身体状况预测巴西东南部塞拉多鸟类的血孢子虫寄生虫病

IF 0.4 4区生物学

Ardea Pub Date : 2021-12-03 DOI: 10.5253/arde.v109i3.a7

R. da Silva Rodrigues, V. A. de Souza Penha, R. Y. Miwa, J. Branco, Oswaldo Marçal Júnior

{"title":"Stress and Body Condition Predict Haemosporidian Parasitaemia in Birds from Cerrado, Southeastern Brazil","authors":"R. da Silva Rodrigues, V. A. de Souza Penha, R. Y. Miwa, J. Branco, Oswaldo Marçal Júnior","doi":"10.5253/arde.v109i3.a7","DOIUrl":"https://doi.org/10.5253/arde.v109i3.a7","url":null,"abstract":"Stress may be defined as a change in the homeostasis of an individual. However, if long-lasting, stress may produce significant detrimental effects to individuals, such as increasing the susceptibility to haemosporidian parasites. Therefore, we aimed to study whether and how stress and body condition predict the probability of hosts having haemosporidian parasites and increased parasite load. We captured birds in an area of Cerrado stricto sensu in southeastern Brazil and used microscopy techniques to assess haematological parameters, as well as infections by protozoans, and confirmed all infections using nested PCR. We used the heterophil/lymphocyte ratio and global leucocytes as a proxy of individual stress and the scaled mass index as a body condition metric. We captured 68 individuals from five bird species: Ruddy Ground-dove Columbina talpacoti, Great Kiskadee Pitangus sulphuratus, Lesser Elaenia Elaenia chiriquensis, Flavescent Warbler Myiothlypis flaveola and Brown-crested Flycatcher Myiarchus tyrannulus. We did not find support for parasite prevalence being predicted by body condition or haematological variables. However, we found that birds with a higher heterophil/lymphocyte ratio, lower body condition and lower global leukocyte count, were more likely to have a higher parasite load (haemosporidian parasitaemia). Our results suggest that birds with chronic stress and poor health may be more susceptible to greater infection intensity and/or recrudescence episodes by malarial parasites due to previous immunosuppression.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"109 1","pages":"175 - 183"},"PeriodicalIF":0.4,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49310811","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}

引用次数: 1

Importance of Algarrobo Trees Prosopis flexuosa for Territory Establishment of Three Seed-Eating Passerine Species in the Central Monte Desert 弯曲藻对中蒙特沙漠建立三种食籽雀形目的重要意义

IF 0.4 4区生物学

Ardea Pub Date : 2021-12-03 DOI: 10.5253/arde.v109i3.a6

M. C. Sagario, V. Cueto

{"title":"Importance of Algarrobo Trees Prosopis flexuosa for Territory Establishment of Three Seed-Eating Passerine Species in the Central Monte Desert","authors":"M. C. Sagario, V. Cueto","doi":"10.5253/arde.v109i3.a6","DOIUrl":"https://doi.org/10.5253/arde.v109i3.a6","url":null,"abstract":"In the central Monte desert in Argentina, feeding site selection by seed-eating birds and their high abundance associated with the presence of trees (particularly Algarrobos Prosopis flexuosa) are well known patterns during the breeding season, but these associations disappear during autumn and winter. In order to understand habitat selection by these bird species, we assessed the importance of Algarrobos during the defence and establishment of breeding territories in the open Algarrobo woodland of the central Monte desert for the three most common resident seed-eating birds: Ringed Warbling-finch Microspingus torquatus, Many-coloured Chaco Finch Saltatricula multicolor and Rufous-collared Sparrow Zonotrichia capensis. Despite some ecological differences between the species (e.g. nest site selection, feeding behaviour) all of them selected Algarrobos as song posts. Height, density and spatial configuration of these trees were features associated with the selection of territories. The patterns of selection we found at previously unexplored spatial scales (territory and within-territory) and associated with territorial defence, provided plausible explanations to seasonal shifts in the space use reported for central Monte desert seed-eating birds and highlight the close link between central Monte desert avifauna and Algarrobos. As in many arid regions, tall scattered trees are keystone features of the central Monte desert and management plans should be implemented in order to stop the current degradation and loss of these arid woodlands.","PeriodicalId":55463,"journal":{"name":"Ardea","volume":"109 1","pages":"251 - 257"},"PeriodicalIF":0.4,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45278227","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}

引用次数: 0

Asymmetric Antipredator Behaviour in a Mixed-Species Colony of Two Non-Mobbing Bird Species 两种非迁徙鸟类混合种群中的不对称反捕食者行为

IF 0.4 4区生物学

Ardea Pub Date : 2021-12-03 DOI: 10.5253/arde.v109i3.a9

Rina Honda, N. Azuma

引用次数: 0

Ardea最新文献