Ornithological Science最新文献_第2页

Fine-Scale Nuclear Genetic Structuring within the Ryukyu Robin, a Species Complex Endemic to the Ryukyu Archipelago 琉球列岛复杂特有种琉球知更鸟精细尺度的核遗传结构

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-07-26 DOI: 10.2326/osj.22.137

Shin‐Ichi Seki

{"title":"Fine-Scale Nuclear Genetic Structuring within the Ryukyu Robin, a Species Complex Endemic to the Ryukyu Archipelago","authors":"Shin‐Ichi Seki","doi":"10.2326/osj.22.137","DOIUrl":"https://doi.org/10.2326/osj.22.137","url":null,"abstract":"Abstract The Ryukyu Robin species complex, including the Ryukyu Robin Larvivora komadori and the Okinawa Robin L. namiyei, is endemic to the islands of the Ryukyu Archipelago. Population genetic structure and gene flow within this complex were investigated using 14 nuclear microsatellite markers. Distinct genetic differentiation was detected between the Ryukyu and Okinawa robins, and the Ryukyu Robin was further differentiated into four regional groups belonging to the Danjo Islands, Tokara Islands, Oh-shima with some adjacent islands, and Tokuno-shima. Contemporary gene flow among these regional groups was restricted overall, but outflow from the Tokara Islands group to the other three groups was exceptionally high. This asymmetric pattern may have been affected by differences in the isolation distance, migratory habits, and population size. The Ryukyu Robin species complex was long considered a single polytypic species; however, it has recently been classified as two independent species, mainly owing to the deep mitochondrial DNA divergence between them and a phenotypical re-examination. The genetic structure inferred from the nuclear loci strongly supports their genetic independence. The Okinawa Robin provides the first case among birds for which the splitting of sister species both endemic to the Ryukyu Archipelago is supported by all of the morphological, behavioral, ecological, and genetic evidence. Such recognition appears preferable in avian conservation and biogeography studies. Currently, the Ryukyu Archipelago includes an Endemic Bird Area and two Natural World Heritage sites, making the reliable delimitation of endemic species all the more important. Comprehensive genetic investigation, together with phenotypical re-examination is necessary, even for closely resembling but allopatric sister forms in this region.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44979822","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

First Direct Evidence of Inter-Island Dispersal of Ryukyu Scops Owl Otus elegans 琉球Scops Owl Otus elegans岛间传播的第一个直接证据

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-07-26 DOI: 10.2326/osj.22.191

A. Sawada, Kiyohisa Tatematsu, Toshiyuki Kawano, M. Takagi

引用次数: 0

Absence of Genetic Structure among Streaked Shearwaters Calonectris leucomelas Breeding in Japan, Despite Limited Dispersal Events 尽管分散事件有限，但在日本进行的条纹剪水Calonectris leucomelas育种中缺乏遗传结构

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-07-26 DOI: 10.2326/osj.22.111

M. Sakao, T. Hamabata, Katsufumi Sato, Shinichi Watanabe, K. Yoda, Kozue Shiomi

{"title":"Absence of Genetic Structure among Streaked Shearwaters Calonectris leucomelas Breeding in Japan, Despite Limited Dispersal Events","authors":"M. Sakao, T. Hamabata, Katsufumi Sato, Shinichi Watanabe, K. Yoda, Kozue Shiomi","doi":"10.2326/osj.22.111","DOIUrl":"https://doi.org/10.2326/osj.22.111","url":null,"abstract":"Abstract The genetic structure of Streaked Shearwater Calonectris leucomelas, a seabird breeding on islands around Japan, was investigated using nuclear microsatellite markers at four breeding colonies located in three geographically distinct areas (Pacific Ocean, Sea of Japan, and Seto Inland Sea). To investigate independently natal and breeding dispersal patterns, we analyzed records of recoveries of birds banded around Japan over a 30-year period from 1971 to 2020. The genetic marker analysis showed little differentiation among the breeding sites and a lack of population structure. In contrast, banding data presented few examples of natal and breeding dispersal and a much greater number of natal/breeding philopatry cases. Although further research is needed to understand the discrepancy between the genetic properties and recapture patterns of banded birds, some possible reasons are suggested: actual dispersal events may not have been fully detected by the banding research, thus, underestimating dispersal frequency; rare dispersal events may have functioned to reduce the genetic structure; and/or breeding colonies of this species might have been established recently, thus genetic markers may not be indicative of current dispersal patterns. In conclusion, our results indicate ongoing gene flow and/or strong historical association in this species.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45814286","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

Nesting Preferences of Two Cavity-Nesting Passerines in Human Houses 人类住宅中双腔巢雀的筑巢偏好

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-07-26 DOI: 10.2326/osj.22.179

Xiaogang Yao, Yan Cai, Ping Ye, W. Liang, Canchao Yang

引用次数: 0

The Behaviour of Japanese Night Heron Gorsachius goisagi on Awaji Island, Japan, Recorded by Camera Traps 日本淡水岛上日本夜鹭gosachius goisagi的行为，由相机陷阱记录

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-07-26 DOI: 10.2326/osj.22.161

D. Higashide, Takeo Kuriyama, S. Takagi, Hiroo Numata, M. Yokoyama

{"title":"The Behaviour of Japanese Night Heron Gorsachius goisagi on Awaji Island, Japan, Recorded by Camera Traps","authors":"D. Higashide, Takeo Kuriyama, S. Takagi, Hiroo Numata, M. Yokoyama","doi":"10.2326/osj.22.161","DOIUrl":"https://doi.org/10.2326/osj.22.161","url":null,"abstract":"Abstract Japanese Night Heron Gorsachius goisagi has recently been down-listed in status from Endangered to Vulnerable by BirdLife International due to the presence of a likely larger population than previously considered. However, there is still relatively little known about the ecology and current population status of this rare, elusive, and solitary species. In this study, we used infrared cameras to study its behaviour. We installed cameras at 120 locations on the forest floor of Awaji Island, Hyogo Prefecture, Japan, over approximately one year. Japanese Night Heron was recorded at 15 locations (132 video files of 25 independent events). All records except one were obtained during the daytime, and all involved herons walking on the forest floor where they were searching for potential prey items (most likely earthworms). Both adult and recently fledged juvenile herons were recorded, providing direct evidence that the species breeds on Awaji Island. Additionally, a zero-inflated Poisson GLMM analysis showed that Japanese Night Heron may not prefer evergreen coniferous plantations. Our results not only indicate that the species forages diurnally, contrary to its common name, but also sheds light on the importance of maintaining forests and foraging ground environments for the conservation of this species.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41572912","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

Eastern Buzzard Buteo japonicus toyoshimai Breeding on the Ogasawara Islands Depend on Non-Native Rats as a Food Source 小笠原群岛东方蟾蜍以非本土鼠为食物来源的繁殖

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-07-26 DOI: 10.2326/osj.22.123

Masahiro Hayama, Masatoshi Yui

{"title":"Eastern Buzzard Buteo japonicus toyoshimai Breeding on the Ogasawara Islands Depend on Non-Native Rats as a Food Source","authors":"Masahiro Hayama, Masatoshi Yui","doi":"10.2326/osj.22.123","DOIUrl":"https://doi.org/10.2326/osj.22.123","url":null,"abstract":"Abstract Since human settlement of the Ogasawara Islands in the early 19th century, several bird species have become extinct owing to the impact of the introduction of non-native species, and other factors. In particular, on the island of Hahajima, seabird breeding colonies have been devastated. This study aimed to determine the relationship between the endemic subspecies of Eastern Buzzard Buteo japonicus toyoshimai and various non-native rats on Hahajima, Ogasawara Islands, Japan. Over a period of 5–10 years video-recordings were made of food being delivered to buzzard nests at three study sites on Hahajima. Rats Rattus spp. were the most abundant prey delivered to the nestlings, accounting for 71–91% of prey items and 83–96% of prey weight; next in abundance was the introduced Green Anole Anolis carolinensis, 6–21% in number. However, since anoles are much smaller than rats, even at the study site where a high proportion of anoles were delivered, the buzzard pair there did not consume fewer rats than at the other sites. Only a small number of birds (1–6%) were delivered to the nests. At one site, where breeding occurred seven times during the study period, there was a significant positive correlation between the number of rats delivered to the nest during the nestling period and precipitation in the October before breeding and in January of the year of breeding.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49588998","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

Colour Aberration in the Western Jackdaw Corvus monedula 西部寒鸦的色差

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-07-26 DOI: 10.2326/osj.22.195

Zuzanna Zaradzka

引用次数: 0

Stable Isotope Differences among Species, Sexes, and Breeding Stages of Laysan and Black-Footed Albatrosses in the Western North Pacific 北太平洋西部黑背信天翁和黑足信天翁物种、性别和繁殖期的稳定同位素差异

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-01-26 DOI: 10.2326/osj.22.3

Y. Inoue, S. Nakatsuka, Y. Niizuma, D. Ochi, N. Katsumata, K. Okamoto, Y. Ishihi, K. Oshima, H. Minami

{"title":"Stable Isotope Differences among Species, Sexes, and Breeding Stages of Laysan and Black-Footed Albatrosses in the Western North Pacific","authors":"Y. Inoue, S. Nakatsuka, Y. Niizuma, D. Ochi, N. Katsumata, K. Okamoto, Y. Ishihi, K. Oshima, H. Minami","doi":"10.2326/osj.22.3","DOIUrl":"https://doi.org/10.2326/osj.22.3","url":null,"abstract":"Abstract In order to understand the diet of Laysan Albatross Phoebastria immutabilis and Black-footed Albatross P. nigripes in western North Pacific waters, we investigated isotopic differences between species, sexes and breeding stages. We measured carbon and nitrogen isotope ratios in the muscles and livers of albatrosses (caught during Japanese pelagic longline fishing) and in their potential prey. Both δ 13C and δ15N of Black-footed Albatross were higher than those of Laysan Albatross. Delta13C of both species differed seasonally and δ13C was lower during the incubation period than during the chick-provisioning and non-breeding periods. The δ 13C and δ15N levels of males did not differ from those of females in either species. Our results suggest that Black-footed Albatross forages on higher isotope prey items and/or Laysan Albatross forages on lower isotope prey items other than squid and fish and that δ13C varies in response to seasonal variation in prey availability. This implies that Black-footed Albatross forages more on discard from the fishing industry than does Laysan Albatross; this in turn may be related to the areas of operation sea area of the longline fisheries in the western North Pacific. In conclusion, it is important for conservation of these two albatross species to monitor their diets and foraging areas and to identify the species-specific high-risk areas where albatross bycatch is most likely.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44482469","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

Estimation of Condition-Dependent Dispersal Kernel with Simple Bayesian Regression Analysis 条件相关分散核的简单贝叶斯回归估计

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-01-26 DOI: 10.2326/osj.22.25

A. Sawada, Tetsuya Iwasaki, Chitose Inoue, K. Nakaoka, Takumi Nakanishi, Junpei Sawada, Narumi Aso, Syuya Nagai, Haruka Ono, Ryota Murakami, M. Takagi

引用次数: 1

Adaptive Features of the Eye to the Ecological Habit of the Short-Eared Owl Asio flammeus and Japanese Scops Owl Otus semitorques 短耳鸮(Asio flammeus)和日本鸮(Otus semiorques)眼睛对生态习性的适应特征

IF 0.6 4区生物学

Ornithological Science Pub Date : 2023-01-26 DOI: 10.2326/osj.22.35

Hiroyuki Nishimura, N. Nakamuta, Yoshio Yamamoto

{"title":"Adaptive Features of the Eye to the Ecological Habit of the Short-Eared Owl Asio flammeus and Japanese Scops Owl Otus semitorques","authors":"Hiroyuki Nishimura, N. Nakamuta, Yoshio Yamamoto","doi":"10.2326/osj.22.35","DOIUrl":"https://doi.org/10.2326/osj.22.35","url":null,"abstract":"Abstract In this study we investigated the eye morphology and retinal topography of two owl species in relation to their visual environment. Although Short-eared Owl Asio flammeus is larger and weighs more than Japanese Scops Owl Otus semitorques, its eye dimensions (weight, corneal diameter, and axial length) are all smaller than the scops owl's. Owl retinas were examined in Nissl-stained whole-mount preparations. The total number of retinal ganglion cells (RGCs) was greater in the Japanese Scops Owl (4,703.0×103 cells) than in the Short-eared Owl (2,346.8×103 cells). The eye morphology of, and the number of RGCs in the Japanese Scops Owl indicate that it is more adapted to a nocturnal habit. An area of high-density RGCs was horizontally distributed in the temporal retina of the Short-eared Owl, with a peak density of 17.4×103 cells/mm2. In the Japanese Scops Owl's temporal retina, there was an oval-shaped arrangement with a peak density of 23.1×103 cells/mm2. These distributions indicate that whereas Short-eared Owl is adapted to open habitats, Japanese Scops Owl is adapted to enclosed habitats. The RGCs of both species were classified into three categories (small, medium, and large) based on the size and appearance of somas. In both species, medium-sized cells predominated, and the proportion of large-sized cells was smallest. The distribution and high-density areas differed among these groups, suggesting adaptation to the visual environment. The high-density areas of these groups cover the nasal visual fields, which include the overlap for binocular vision.","PeriodicalId":49009,"journal":{"name":"Ornithological Science","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45939175","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