著者

Sharifah Nur Atikah Muhammad Syafiq Yahya Chong Leong Puan Mohamed Zakaria Badrul Azhar

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.18, no.2, pp.127-134, 2019 (Released:2019-07-29)

参考文献数

51

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A high demand for palm oil has led to the continued expansion of oil palm agriculture at the expense of tropical forests and forest biotic communities in many developing countries. The response of wildlife to oil palm establishment has been shown to vary according to taxa, and many forest species may not be able to adapt to the altered landscape. Many nocturnal bird species have been recorded in oil palm agriculture. Whether such forest species can also thrive in such a landscape is not known, and their responses to habitat complexity are poorly understood. We conducted point surveys of nocturnal birds (Tytonidae, Strigiformes and Caprimulgiformes over 80 points spaced at least 800 m apart and revisited five times) in oil palm smallholdings at Tanjung Karang, Kuala Selangor. Environmental factors measured at each point included: average height of oil palm stands, palm density, crop richness, and distances to the nearest forest, river and road. We recorded a total of 577 individuals of seven species. Palm density and distance to river were found to positively influence nocturnal bird species richness, whereas distance to the nearest forest was found to negatively influence avian species richness. In the case of abundance, number of oil palms, crop richness, and distance to the nearest river were found to influence nocturnal bird abundance positively in the smallholdings; however, distance to the nearest forest was found to influence bird abundance negatively. These findings suggest that maintaining key vegetation structure while reducing manmade structures such as roads may benefit nocturnal bird species in the smallholdings particularly those of open and semi-open habitats. However, the number of forest-associated species remained low in the smallholdings, which may only serve as suboptimal habitat for these birds. This implies that forest-associated species may not be able to persist in such landscapes.

著者

László Bozó Wieland Heim Daronja Trense Pia Fetting Hans-Jürgen Eilts Jonas Wobker Tibor Csörgő

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.18, no.2, pp.177-181, 2019 (Released:2019-07-29)

参考文献数

31

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The aim of our study was to describe the migration timing of two Siberian Locustella species at a breeding site in the Russian Far East. Our results show, that juvenile Lanceolated Warbler Locustella lanceolata leave the study site earlier than adults, while juvenile Pallas's Grasshopper Warbler L. certhiola start their migration later than adults, which might be caused by juveniles and adults moulting at different times. Both species undertake a fast migration without long-term stopovers at the study site.

著者

Shin Ito

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.1, no.2, pp.159-162, 2002 (Released:2005-08-25)

参考文献数

16

被引用文献数

8

著者

Michele Panuccio Marco Gustin Giuseppe Lucia Giuseppe Bogliani Nicolantonio Agostini

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.18, no.1, pp.49-57, 2019 (Released:2019-01-29)

参考文献数

56

被引用文献数

2

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Migrating birds adjust their behaviour in order to reach their final destination safely and in a timely manner. In doing so, they fly at different altitudes, but unlike passerines, raptors do not explore all air levels searching for the best tailwind assistance. Soaring species migrate over the mainland using updrafts to optimize soaring-gliding flight and reaching higher altitudes during midday. However, there is little information on which variables affect their flight altitude when facing the open sea, where thermals are very weak and they are forced to use powered flapping flight for a long time. To fill this gap, we recorded the flight altitude of migrating European Honey Buzzards Pernis apivorus as they crossed the Tyrrhenian Sea (Central Mediterranean) and passed over a small island. During four migratory seasons, we recorded the altitudes of birds when they reached the NE coast of Ustica, a volcanic island between Sicily and central Italy, and analysed data in relation to several variables. The results showed that the tendency to continue migrating, flock size, and wind speed are the most important features in explaining height variation in migrating European Honey Buzzards facing the open sea.

著者

Tatsuya Amano Mei-Hua Li Hoshiko Yoshida

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.9, no.1, pp.49-53, 2010-06-25 (Released:2010-07-10)

参考文献数

20

被引用文献数

8

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Many studies have reported population declines and range contractions of bird species in agricultural landscapes around the world. However, few studies have described population trends of bird species in rice-paddy areas or identified causes of decline in these areas as opposed to other types of farmland. The Greater Painted Snipe Rostratula benghalensis is strongly dependent on rice-paddy areas for habitat. This paper uses the results of local field surveys and national survey data to document the population trends of Greater Painted Snipe in Japan. Field surveys conducted in Ibaraki Prefecture indicated a severe decline over a recent 10-year period. Data from the National Surveys on the Natural Environment also showed that the distribution of the Greater Painted Snipe has decreased nationwide from the 1970s to the 1990s. This population decline might be due to (1) the introduction of an efficient drainage system in rice fields and/or (2) a reduction in the area of flooded fallow fields with short vegetation at both breeding and wintering sites. Further work on the conservation status of this species is urgently needed.

著者

Johanna P. Pierre Shelly M. Boss Cynthia A. Paszkowski

出版者

日本鳥学会

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.4, no.2, pp.161-168, 2005 (Released:2005-12-25)

参考文献数

40

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We compared foraging behavior of Bufflehead (Bucephala albeola Linnaeus) and Common Loon (Gavia immer Brünnich) on eight lakes in harvested and unharvested boreal mixedwood forest in northern Alberta, Canada. For one summer before (1996) and two summers after (1997, 1998) forest harvesting around three of the eight lakes, we recorded the duration of Bufflehead and Common Loon dives. After logging, forested buffer strips 100 m-wide separated cut-blocks from lakes (‘harvested lakes’). ‘Unharvested lakes’ were surrounded by ≥450 m of undisturbed forest throughout the study. There were no detectable differences in dive duration between harvested and unharvested lakes for Bufflehead or Common Loon. Correlations between environmental variables (water clarity, fish biomass, depth) and the duration of Common Loon dives were not significant. However, the duration of Bufflehead dives differed between lakes, unrelated to forest harvesting. The duration of Bufflehead dives was negatively correlated with water clarity but was not significantly correlated with fish biomass. While our study shows that the foraging behavior of Buffleheads was affected by lake conditions, the utility of aquatic birds as indicators of the effects of forestry on western boreal lakes remains unproven.

著者

Bhoj Kumar ACHARYA Lalitha VIJAYAN

出版者

日本鳥学会

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.16, no.2, pp.131-140, 2017 (Released:2017-08-08)

参考文献数

78

被引用文献数

17

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We examined the vertical stratification of birds in relation to foliage in different vegetation types along an elevation gradient in Sikkim, Eastern Himalaya, India. We used variable-width point count methods for sampling birds spread across 20 transects along an elevation gradient from 300 m to 3,800 m above mean sea level. We estimated species richness, abundance and Shannon-Weiner diversity (H′) of birds in seven height categories (0 m, 0-5 m, 5-10 m, 10-15 m, 15-20 m, 20-25 m and >25 m). Foliage structure and complexity of vegetation was assessed along all transects following Erdelen (1984) and Jayson and Mathew (2003). Birds displayed distinct vertical stratification in terms of species richness, abundance and diversity in Sikkim. Overall, maximum species richness (231) was observed at 0-5 m height followed by 5-10 m, 10-15 m and the ground layer (0 m). There was no significant difference in stratification pattern among elevation zones. Each height class harboured distinct species composition of birds with low similarity among height categories. We observed maximum foliage concentration within 10 m height from the ground, and the trend was consistent in all of the zones. Correlation analysis revealed significant positive relations between foliage abundance and species richness, abundance and diversity of birds. Results of this study have highlighted the significance of under-storey or sub-canopy vegetation in maintaining and conserving avifaunal diversity in the Eastern Himalaya.

著者

Masaoki Takagi Takema Saitoh Noriyuki Yamaguchi Hiroto Okabe Isao Nishiumi Masayoshi Takeishi

出版者

日本鳥学会

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.14, no.1, pp.53-59, 2015 (Released:2015-02-18)

参考文献数

19

被引用文献数

7

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A nest of the Ryukyu Scops Owl Otus elegans was found on Okinoshima (Okino Island), Fukuoka Prefecture, Japan (34.24°N, 130.10°E), in the Tsushima Strait, on 28 July 2013. The breeding pair and their three owlets were caught and their identity confirmed genetically using the BOLD System for COI in the mitochondrial genome. Their calls and external morphological measurements also accorded with what is known of the species. We estimated that at least 23 territorial males inhabit the Island. Okinoshima lies 490 km beyond the previously known northern limit of the species' distribution.

著者

Yoichiro Takanose Tomohiko Kamitani

出版者

日本鳥学会

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.2, no.1, pp.25-32, 2003 (Released:2005-09-09)

参考文献数

19

被引用文献数

18 26 20

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We investigated the seasonal correspondence between the fruiting phenology of fleshy-fruited plants and the abundance of frugivorous birds, in a temperate forest, in central Japan. The majority of fleshy fruits ripened in the fall when frugivorous birds were most abundant. This correspondence occurred earlier than in a warm temperate forest, located in southern Japan; these relationships in East Asia coincide with those of the temperate regions of North America and Europe. We also examined whether the abundance of frugivorous birds led to profitable effects for seed dispersal among fleshy-fruited plants. The Brown-eared Bulbul Hypsipetes amaurotis was considered to be an important seed disperser for many fleshy-fruited plants because of its high frequency of occurrence throughout the fruiting season, and its large gape size, which allowed it to swallow all sizes of fruits found at the study site. Although numerous Brown-eared Bulbuls and other frugivorous birds were present in the fall, fruit removal rates in fall-fruiting species were not always higher than in summer-fruiting species. The abundance of frugivorous birds alone could therefore not adequately explain the concentrated fruiting phenology among fleshy-fruited plants.

著者

Kazuto KAWAKAMI Yoshimori YAMAGUCHI

出版者

日本鳥学会

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.3, no.1, pp.13-21, 2004 (Released:2005-02-09)

参考文献数

40

被引用文献数

2 5

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The Melodious Laughing Thrush Garrulax canorus is an introduced species in Japan, and it has been recorded in the wild since the 1980s. The distribution of this species was estimated based on questionnaires. Four populations of this species have been confirmed in the western Kanto, northern Kyushu, southern Tohoku and Nagano Prefecture. There is a possibility that the expansion of this species is limited by elevational conditions and snowfall. Nevertheless, the distribution is still expanding. Therefore, it is necessary, as soon as possible, to assess the effect of the Melodious Laughing Thrush on the native birds.

著者

Hasegawa Masaru Arai Emi Kojima Wataru Kitamura Wataru Fujita Go Higuchi Hiroyoshi Watanabe Mamoru Nakamura Masahiko

出版者

日本鳥学会

雑誌

Ornithological science (ISSN:13470558)

巻号頁・発行日

vol.9, no.2, pp.161-164, 2010-12

被引用文献数

24 3

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On average, male birds other than social father sire more than 10% of all offspring. Levels of extra-pair paternity below 5% of offspring are rarely found and are now considered worthy of explanation in monogamous birds. We recorded the lowest levels of paternity loss ever reported in a population of Barn Swallows Hirundo rustica. The levels of extra-pair paternity were below 5% of offspring (7/243 in 2005 and 1/53 in 2006). We discuss our results in relation to the density-dependence of extra-pair paternity.

著者

Hasegawa Masaru Arai Emi Watanabe Mamoru Nakamura Masahiko

出版者

日本鳥学会

雑誌

Ornithological science (ISSN:13470558)

巻号頁・発行日

vol.9, no.2, pp.141-148, 2010-12

被引用文献数

44 6

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The maintenance of multiple ornaments by animals can be explained when those multiple ornaments are sexually selected. However, there have been only a few studies of sexual selection on multiple ornaments. We investigated sexual selection on two ornaments, plumage coloration and white spots in the tail, in a population of Barn Swallows Hirundo rustica gutturalis in Japan. There was sexual dimorphism in throat coloration and in the size of the white spots in the tail. Males with a less saturated (colourful) throat and larger white spots in the tail bred earlier than others, indicating a mating advantage for these males. These trends are what would be expected if these ornaments were indeed sexually selected.

著者

Hasegawa Masaru Arai Emi Watanabe Mamoru Nakamura Masahiko

出版者

日本鳥学会

雑誌

Ornithological science (ISSN:13470558)

巻号頁・発行日

vol.7, no.2, pp.117-122, 2008-12

被引用文献数

26 8

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It is necessary to correct plumage color fading when comparing the plumage coloration of birds captured at different times during the breeding season. We proposed two methods for correcting plumage color fading and compared them using the throat feathers of the Barn Swallow (Hirundo rustica gutturalis). One method uses the color shift of feathers on live birds during the same breeding season (the field method). The other method uses longitudinal color measurements of feathers placed on the open ground (the experimental method). This method has an advantage of not capturing the birds twice. The field and experimental methods estimated similar rates of fading of hue and brightness. Saturation was predicted to fade with time in the experimental method, which is unrealistic because there was no effect of time on saturation in live birds. Using the field method, we derived an equation for correcting plumage color fading in Barn Swallows. When assessing changes in plumage color, the field method should be used whenever possible since this method estimates plumage color fading in live birds.

著者

Hau-Jie Shiu Ken-ichi Tokita Emiko Morishita Emiko Hiraoka Yinyin Wu Hiroshi Nakamura Hiroyoshi Higuchi

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.5, no.2, pp.151-156, 2006 (Released:2007-02-01)

参考文献数

21

被引用文献数

24

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In order to examine fidelity to migration route, breeding, wintering, and stopover sites, we analyzed the migration of two adult Grey-faced Buzzards Butastur indicus and an adult Honey-buzzard Pernis apivorus that were satellite-tracked in East Asia for more than two migration seasons. The Grey-faced Buzzards showed a high degree of route fidelity across seasons and years. On the other hand, the migration routes of the Honey-buzzard were distinctly different between fall and spring seasons, whereas, within each season they were roughly similar between years. All three raptors were strictly faithful to their breeding and wintering sites. They also showed fidelity to several stopover sites in which the raptors stayed for relatively long periods to replenish energy. Our findings have important implications for the conservation of the migratory raptors.