Ornithological Science最新文献_第5页

Estimation of Population Size and Sex Ratio of Ryukyu Scops Owl Otus elegans on Hateruma Island 天沼岛琉球鸮种群规模和性别比的估算

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-07-29 DOI: 10.2326/osj.21.245

A. Sawada

引用次数: 1

Egg Pattern Mimicry in Avian Brood Parasitism Assessed Using Local Image Descriptors and Human-Eyes 用局部图像描述子和人眼评估禽类寄生虫的蛋型模拟

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-07-29 DOI: 10.2326/osj.21.189

Huu Ton Le, Doanh Nguyen-Ngoc, Hoang Tung Tran, A. Giang, Edourd Amouroux, A. Muñoz, F. Takasu

{"title":"Egg Pattern Mimicry in Avian Brood Parasitism Assessed Using Local Image Descriptors and Human-Eyes","authors":"Huu Ton Le, Doanh Nguyen-Ngoc, Hoang Tung Tran, A. Giang, Edourd Amouroux, A. Muñoz, F. Takasu","doi":"10.2326/osj.21.189","DOIUrl":"https://doi.org/10.2326/osj.21.189","url":null,"abstract":"Abstract Egg pattern plays a critical role in avian brood parasitism where a brood parasite exploits a host's parental care by laying eggs in host nests relying on the host to rear the parasitic egg(s). It has been demonstrated that many hosts have evolved an ability to recognize and reject parasitic eggs, based on differences in egg patterns, as a defense against brood parasitism, while some parasites have evolved egg mimicry to counter the host defense. Egg pattern is a complex phenotype and its quantitative evaluation has been a focus of much research. In this paper, we propose a novel method for quantifying an egg pattern and assessing the degree of egg pattern mimicry—a measure of the similarity of a parasite egg to host eggs. Our approach is based on image analysis focused on local binary pattern (LBP) and its variant completed local binary pattern (CLBP) that captures the local structure of a pattern in an image. We compare the results obtained by LBP and CLBP with human-eye evaluation, a classical method widely used in previous studies. Both LBP and CLBP can successfully assess the similarity in egg pattern that is positively correlated with human-eye scores with a high accuracy rate. LBP tends to perform better than CLBP at small scales while CLBP performs better for a wide range of larger scales. Our method can be an effective alternative means of assessing the degree of egg pattern mimicry objectively, providing a useful tool for biologists studying avian brood parasitism. Many bird species have specific eggshell patterns (e.g. spots, blotches, lines) and it has been suggested that these patterns are an important functional trait, such as for camouflage against predators. We propose our method as a useful and objective tool for assessing egg patterns.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48248378","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

The Effect of Experience on Parental Role Division in Ryukyu Scops Owl Otus elegans 经验对琉球鸮亲代角色划分的影响

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.35

Ryota Murakami, A. Sawada, Haruka Ono, M. Takagi

{"title":"The Effect of Experience on Parental Role Division in Ryukyu Scops Owl Otus elegans","authors":"Ryota Murakami, A. Sawada, Haruka Ono, M. Takagi","doi":"10.2326/osj.21.35","DOIUrl":"https://doi.org/10.2326/osj.21.35","url":null,"abstract":"Abstract Parental role division is common among monogamous birds. Among raptors, males typically expend more effort to feed their chicks than do females, yet few studies have focused on how each pair establishes this role division. Therefore, in this study we examined the mechanism of role division in the Ryukyu Scops Owls Otus elegans on Minami-daito Island. Pairs of this species typically remain together and use the same nest over several years, so there is a possibility that their role division improves with experience over time. To clarify this, we studied the feeding frequency and territorial usage of individuals. Males fed their chicks more frequently than females, and experienced individuals using the same nests fed their chicks more than inexperienced individuals. On comparing experienced and inexperienced pairs, we found that experienced individuals hunted closer to the nest than inexperienced individuals. Furthermore, the home ranges of the males and females of experienced pairs, overlapped less than those of inexperienced pairs. Experience of using a nest site in consecutive years may allow such individual behavioural differences to develop and be involved in role division in parental care.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68750187","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

Bird Use of Fruit Orchards and Vineyards in Japan: Mitigating a Knowledge Gap with a Systematic Review of Published and Grey Literature 日本果园和葡萄园的鸟类利用：通过对已发表和灰色文献的系统回顾来缩小知识差距

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.93

Naoki Katayama, H. Uchida, Y. Kusumoto, Tomohiko Iida

{"title":"Bird Use of Fruit Orchards and Vineyards in Japan: Mitigating a Knowledge Gap with a Systematic Review of Published and Grey Literature","authors":"Naoki Katayama, H. Uchida, Y. Kusumoto, Tomohiko Iida","doi":"10.2326/osj.21.93","DOIUrl":"https://doi.org/10.2326/osj.21.93","url":null,"abstract":"Abstract Perennial farmlands such as fruit orchards and vineyards often substitute for natural habitats and provide nesting and foraging habitats for birds. Bird use of perennial farmlands has been investigated mainly in Europe and North America, but far less in Asia, which hosts one-third of identified biodiversity hotspots. We aimed to fill this knowledge gap by performing a systematic review of bird studies in fruit orchards and vineyards in Japan. We screened literature written in English or Japanese including both published and non-peer-reviewed (grey material, e.g., books, abstracts of annual meetings, blogs, and unpublished surveys). The review identified 31 bird species, including four Red List species, that nest in orchards and vineyards in Japan. Several studies have provided insights into the habitat quality of fruit orchards, which appears to vary among bird species. Other studies have reported: (1) the effects of orchard management on bird diversity (e.g., positive effects of organic farming and grass cover on bird richness and abundance); and (2) the ecosystem services by birds (e.g., reduction of pest rodents by predatory Ural Owls Strix uralensis). Our review demonstrates the potential importance of fruit orchards and vineyards to bird species that have adapted to human-modified landscapes, although more quantitative studies are needed to investigate the actual breeding performance of birds. We also illustrate the importance of non-English-language literature, including grey literature, to mitigate ecological knowledge gaps in countries where English is not the first language.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41496604","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

Pallas's Reed Bunting Emberiza pallasi Found Breeding on Sakhalin Island, Russia 在俄罗斯萨哈林岛发现了帕拉斯的芦苇狩猎

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.115

M. Hasebe, M. Senzaki

引用次数: 0

A Fossil Humerus of Pliocene Alcidae (Aves: Charadriiformes) from the Fukagawa Group in Hokkaido, Japan 日本北海道Fukagawa群上新世Alcidae的一个Humerus化石（Aves:Charadriformes）

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.79

Keiichi Aotsuka, H. Endo

引用次数: 0

Fine-Scale Nest Site Selection of the Endangered Jankowski's Bunting Emberiza jankowskii in Inner Mongolia: Implications for Its Conservation 内蒙古濒危白头雁巢址的精细选择及其保护意义

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.27

Lishi Zhang, Shuangtong Zhu, Zheng Han, Shi Li, Jiyuan Yao, Limin Wang, Haitao Wang, Yun-lei Jiang

{"title":"Fine-Scale Nest Site Selection of the Endangered Jankowski's Bunting Emberiza jankowskii in Inner Mongolia: Implications for Its Conservation","authors":"Lishi Zhang, Shuangtong Zhu, Zheng Han, Shi Li, Jiyuan Yao, Limin Wang, Haitao Wang, Yun-lei Jiang","doi":"10.2326/osj.21.27","DOIUrl":"https://doi.org/10.2326/osj.21.27","url":null,"abstract":"Abstract Nest-site selection can have important fitness consequences for birds. Understanding what information individuals use to choose nest sites is therefore crucial not only for understanding the dynamics of populations, but also for the conservation of species. We identified habitat characteristics predicting nest site selection in the threatened Jankowski's Bunting Emberiza jankowskii in Mongolian grasslands. We recorded 14 habitat characteristics around 83 nests of Jankowski's Bunting and at 83 random points at local and landscape scales. Compared with the random points, Jankowski's Bunting nest sites had significantly greater values for plant canopy, grass height and grass density at the local scale, while such significant differences were not found in the percentages of natural grassland or bare cropland at the landscape scale. The generalized linear model performed on selected independent variables confirmed that Jankowski's Bunting nests occurred more often in densely vegetated areas with tall grass and scrubs. This study highlighted the importance of plant cover and vegetation height in the species' nest site selection and suggested that continuous control of grazing pressure is necessary to better conserve the natural grasslands needed for the persistence of Jankowski's Bunting.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44046586","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

Breeding Ecology of the Snow Partridge (Lerwa lerwa) in High-Altitude Regions, Tibet 西藏高海拔地区雪鹧鸪(Lerwa Lerwa)的繁殖生态学

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.13

Lian Honglei, P. McGowan, W. Nan, Zhou Huaming, Li Zhaxijie

{"title":"Breeding Ecology of the Snow Partridge (Lerwa lerwa) in High-Altitude Regions, Tibet","authors":"Lian Honglei, P. McGowan, W. Nan, Zhou Huaming, Li Zhaxijie","doi":"10.2326/osj.21.13","DOIUrl":"https://doi.org/10.2326/osj.21.13","url":null,"abstract":"Abstract To explore the environmental adaptation strategies of high-altitude breeding birds to alpine regions, we studied the breeding ecology of the Snow Partridge (Lerwa lerwa) in the Qinghai-Tibet Plateau. Incubation behavior was determined using data loggers in Basu County (2018) and Cuona County (2019), in the Tibet Autonomous Region, China. We monitored seven Snow Partridge nests; clutch sizes ranged from 4–5 eggs per nest (mean=4.71±0.45 eggs, N=7), egg mass ranged from 28.1–37.7 g (mean=31.1±2.5 g, N=28), and the hatching success rate was 87.9% (N=33 eggs, six nests hatched successfully, and one nest suffered a predator attack). Nesting females typically took 1–4 recesses each day (mean=1.8±0.7, N=39 days). In five females, the first daily recess occurred at 0601 to 0709 (mean=0626±16 min, N=39 days) and the duration ranged from 60 min to 615 min (mean=179±102 min, N=39 days). The average nest attendance was 85.6±5.9% (75.9–92.8%, N=6 nests). Compared with other Galliformes, Snow Partridges lay larger eggs and smaller clutches, leave their nests fewer times per day but with a lower nest attendance, and a bimodal pattern of recess timing. Additionally, Snow Partridges build cave nest structures. These characteristics are highly adapted to the alpine region of the Tibetan Plateau and balance the thermal needs of the developing embryos and the self-maintenance needs of the incubating females.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41640433","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

Message from the Editor-In-Chief 总编辑寄语

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.1

T. Mizuta

引用次数: 0

Comparison of the Home Ranges of Mountain Hawk-Eagles during Different Phases of Wind Farm Construction 风电场建设不同阶段山鹰栖息地的比较

IF 0.6 4区生物学

Ornithological Science Pub Date : 2022-02-02 DOI: 10.2326/osj.21.63

Naoya Nishibayashi, W. Kitamura, S. Yoshizaki

{"title":"Comparison of the Home Ranges of Mountain Hawk-Eagles during Different Phases of Wind Farm Construction","authors":"Naoya Nishibayashi, W. Kitamura, S. Yoshizaki","doi":"10.2326/osj.21.63","DOIUrl":"https://doi.org/10.2326/osj.21.63","url":null,"abstract":"Abstract Raptors are long-lived apex predators with a lower rate of breeding success than smaller birds. Therefore, their responses to the construction of wind farms must be documented to assess the impact of wind energy on birds. We estimated the home ranges of three pairs of Mountain Hawk-Eagle Nisaetus nipalensis orientalis before, during, and after construction of a wind energy facility to assess changes in home range. We also compared altitude, inclination, and land cover composition of habitats within home ranges during the construction phase. For one pair, the home range of which included wind farm construction, the distance from the home range to the construction area during the first year of construction increased significantly compared with that during pre-construction, but there was no significant difference between the post-construction and construction phase. It is thought that the construction of a wind farm within the home range caused the displacement, and that displacement began during the first phase of construction and continuing during the second phase and afterwards. Because the birds moved about 500 m away from the wind farm during the construction and post-construction phases but succeeded in breeding, we think that the distance of 500 m may be meaningful in terms of mitigating disturbance. The nest trees of all three successful breeding pairs were more than 1.3 km from the closest wind turbine, perhaps indicative that impact on breeding is light if construction takes place this far away from breeding sites. No significant differences in either land cover or inclination within home ranges were found during the construction phase, which might explain why all birds bred successfully during the second construction phase. After construction, all three pairs continued to use areas with similar habitat.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44323085","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