Article
Environmental Sciences
Zothanmawii Renthlei, Bijoy Krishna Borah, Amit Kumar Trivedi
Summary: The study investigates the effects of urbanization on bird reproduction and related regulatory molecules. Results show that urban birds exhibit higher levels of corticosterone during the stimulatory phase, and a delay in testicular growth, possibly due to lower T3 levels and reduced transcription of Dio2 and GnRH mRNA in urban birds.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Jian Ding, Wenzhi Yang, Shengnan Wang, Huijie Zhang, Yingmei Zhang
Summary: This study investigates the effects of heavy metals on the morphological characteristics of tree sparrows. The results show that heavy metal concentrations in different tissues are associated with smaller body sizes and higher levels of fluctuating asymmetry in adults and nestlings. The most correlated heavy metal with many characteristics is heavy metal in primary feather, and the most affected characteristic is body mass. The findings suggest that the morphological characteristics of tree sparrows, especially fluctuating asymmetry, can be used as indicators of metal pollution.
Article
Environmental Sciences
Jian Ding, Shengnan Wang, Wenzhi Yang, Huijie Zhang, Fei Yu, Yingmei Zhang
Summary: The bioaccumulation of heavy metals in tree sparrows from polluted and unpolluted sites was investigated. The concentrations of heavy metals were significantly higher in birds from the polluted site. Adult birds had higher metal concentrations compared to nestlings and juveniles. Heavy metals were mainly accumulated in feathers, and correlations between metals in different organs and tissues varied with age.
ENVIRONMENTAL POLLUTION
(2023)
Article
Ornithology
Lirong Zuo, Ibrahim M. Ahmad, Yuanyuan Liu, Limin Wang, Shu Fang, Dongming Li
Summary: Light plays a crucial role in regulating the circadian rhythms of animals. The circadian rhythms of Eurasian Tree Sparrows were studied under different lighting conditions, revealing the impact of abnormal photoperiods on their activity, body mass, and temperature.
Article
Ornithology
Takahiro Kato, Shin Matsui, Osamu K. Mikami, Keisuke Ueda, Nobuyuki Kutsukake
Summary: Avian dispersal patterns vary based on populations and breeding conditions. Female passerine birds tend to disperse longer distances from their natal sites compared to males. In an experiment manipulating breeding density, both males and females in high density plots dispersed shorter distances compared to those in low density plots.
ORNITHOLOGICAL SCIENCE
(2022)
Article
Environmental Sciences
Sheng Zhang, Yue Shen, Shengnan Wang, Zhaocun Lin, Rui Su, Fei Jin, Yingmei Zhang
Summary: The gut microbiota of tree sparrow nestlings is susceptible to heavy metals during early development. However, the results also highlight the presence of adaptive responses that enable them to effectively cope with environmental heavy metal pollution.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Multidisciplinary Sciences
Attila Fulop, Zoltan Nemeth, Bianka Kocsis, Bettina Deak-Molnar, Timea Bozsoky, Gabriella Csoppu, Zoltan Barta
Summary: This study examined the relationship between exploratory behavior and fighting ability in Eurasian tree sparrows during winter competition for food. The results showed no direct correlation between exploratory behavior and fighting ability. However, there was a positive correlation between bib size and probability of winning in females, indicating a potential signaling role of the bib in females as well.
Article
Multidisciplinary Sciences
Ju-Hyun Lee, Ha-Cheol Sung
Summary: In social animals that form flocks, individuals compete or cooperate to access shared resources. In this study, researchers investigated social interactions in captive tree sparrow flocks and found that aggressive behaviors, such as threats and attacks, are used to acquire food resources. They also found correlations between social status and certain morphological traits, which act as indicators of dominance.
Article
Materials Science, Multidisciplinary
Namram S. Singh, Anand S. Dixit, Debashish Khanikar
Summary: The fine histological structures of the pecten oculi of the Eurasian tree sparrow were studied using various microscopy techniques, revealing a pleated type structure with capillaries, blood vessels, and pigmented cells. Histochemical studies showed a large deposition of lipid droplets, especially in the basal area. Electron microscopy displayed endothelial cells surrounded by a thick fibrous basal membrane, with interstitial spaces filled with melanocytes and electron-dense pigment granules. The presence of a dense vascular network and large hyalocytes on the surface of the pleats was observed under scanning electron microscopy. Further research is needed to determine the functional role of the pecten in birds.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Ornithology
Limin Wang, Ghulam Nabi, Li Zhang, Dan Liu, Mo Li, Juyong Li, Kaixin Shi, Ibrahim M. Ahmad, Yuefeng Wu, John C. Wingfield, Dongming Li
Summary: The study on hypothalamic-peptides and gonadal morphology in multibrooded Eurasian Tree Sparrows revealed significant variations in GnRH-I and GnIH expressions during breeding stages, with males showing higher POA-GnRH-I expression. Both sexes exhibited similar patterns of hypothalamic peptide variations and gonadal changes throughout the annual cycle, suggesting a common regulatory mechanism for seasonal reproduction in sparrows.
Article
Biochemistry & Molecular Biology
Anand S. Dixit, Sanborlang Byrsat, Bidisha Kataki
Summary: This study investigated the effects of a single long day on the hypothalamic expressions of GnRH-I and GnIH in Eurasian tree sparrows. The results showed that exposure to a single long day increased expression of GnRH-I mRNA and peptide in the hypothalamus, while decreasing GnIH mRNA levels. However, there was no significant change in GnIH peptide. Under short day conditions, there were no significant changes in GnRH-I or GnIH expression levels.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Article
Ornithology
Ju-Hyun Lee, Wan-Hee Nam, Dong-Yun Lee, Ha-Cheol Sung
Summary: This study investigated the intersexual morphological differences in the Eurasian Tree Sparrow and found that the sex of these birds can be reasonably distinguished by the badge size and wing length.
WILSON JOURNAL OF ORNITHOLOGY
(2022)
Article
Ecology
Iraida Redondo, Jaime Muriel, Cristina de Castro Diaz, Jose Aguirre, Diego Gil, Lorenzo Perez-Rodriguez
Summary: The study found that nestlings exposed to urban conditions had poorer health compared to those in rural or rural-airport environments. Aircraft noise did not appear to be a significant stressor for the nestlings.
EUROPEAN JOURNAL OF WILDLIFE RESEARCH
(2021)
Article
Zoology
Ju-Hyun Lee, Se-Yeong Kim, Dae-Han Cho, Ha-Cheol Sung
Summary: The main cause of bird nest abandonment is the threat of predation, and this behavior imposes significant energy costs on breeding birds. However, for some species, nest abandonment can be a less costly alternative to complete brood failure.
ACTA ZOOLOGICA ACADEMIAE SCIENTIARUM HUNGARICAE
(2023)
Article
Zoology
Luiz Fernando Carmo, Juliana Alves, Iuri R. Dias, Mirco Sole, Caio De Mira-Mendes, Laisa Santos, Mario Barbosa S. Junior, Cassio Zocca, Rodrigo B. Ferreira, Joao Victor A. Lacerda
Summary: The study describes the advertisement call characteristics of Gabohyla pauloalvini, provides new distribution records, and updates the map for this species. Three new populations of Gabohyla pauloalvini have been recorded, extending its distribution by 60 km south. However, Gabohyla pauloalvini is still known only from a few localities.
Article
Behavioral Sciences
Ju-Hyun Lee, Wan-Hee Nam, Dong-Yun Lee, Ha-Cheol Sung
Summary: This study reports the first-ever direct observation of conspecific killing in captive Eurasian tree sparrows and tests hypotheses to explain the causes of this behavior. The results indicate that conspecific killings occur during fights between male tree sparrows to protect their mates.
JOURNAL OF ETHOLOGY
(2022)
Article
Zoology
Kyo Soung Koo, Min Seock Do, Nakyung Yoo, Ha-Cheol Sung
Summary: A large number of Suweon treefrogs were found breeding in a rice paddy in Gimpo-si, South Korea, with a higher number recorded compared to other locations. The reason for their gathering in only one rice paddy remains unclear, calling for further studies and protection efforts.
RUSSIAN JOURNAL OF HERPETOLOGY
(2022)
Article
Genetics & Heredity
Dayeon Chung, Jaehong Park, Seungju Cheon, Seung-Min Park, Ha-Cheol Sung, Dong-Hyun Lee
Summary: The complete mitochondrial genome of Pseudemys peninsularis in Korea was sequenced and characterized. Phylogenetic analysis showed a closer relationship between P. peninsularis and Chrysemys picta than Trachemys scripta elegans.
MITOCHONDRIAL DNA PART B-RESOURCES
(2022)
Article
Biology
Md Mizanur Rahman, Yu-Young Lee, Seung-Min Park, Choong-Ho Ham, Ha-Cheol Sung
Summary: Despite limitations, the use of skeletochronology in amphibians is increasing. This study validates skeletochronology for the age determination of Kaloula borealis and provides accurate information on its life history traits and age structure, which are important for assessing population dynamics and setting conservation priorities. The study also reveals sexual size dimorphism in this species.
Article
Ornithology
Ju-Hyun Lee, Wan-Hee Nam, Dong-Yun Lee, Ha-Cheol Sung
Summary: This study investigated the intersexual morphological differences in the Eurasian Tree Sparrow and found that the sex of these birds can be reasonably distinguished by the badge size and wing length.
WILSON JOURNAL OF ORNITHOLOGY
(2022)
Article
Zoology
Ju-Hyun Lee, Se-Yeong Kim, Dae-Han Cho, Ha-Cheol Sung
Summary: The main cause of bird nest abandonment is the threat of predation, and this behavior imposes significant energy costs on breeding birds. However, for some species, nest abandonment can be a less costly alternative to complete brood failure.
ACTA ZOOLOGICA ACADEMIAE SCIENTIARUM HUNGARICAE
(2023)
Article
Multidisciplinary Sciences
Ju-Hyun Lee, Ha-Cheol Sung
Summary: In social animals that form flocks, individuals compete or cooperate to access shared resources. In this study, researchers investigated social interactions in captive tree sparrow flocks and found that aggressive behaviors, such as threats and attacks, are used to acquire food resources. They also found correlations between social status and certain morphological traits, which act as indicators of dominance.
Article
Multidisciplinary Sciences
Seung-Ju Cheon, Md. Mizanur Rahman, Ji-A Lee, Seung-Min Park, Jae-Hong Park, Dong-Hyun Lee, Ha-Cheol Sung
Summary: Alien invasive species, including pet turtles released into nature, pose conservation challenges worldwide. In this study, DNA technology was used to identify alien freshwater turtle nests, improving the ability to designate invasive and ecosystem-disturbing species. The successful extraction of DNA from Pseudemys peninsularis eggshells allowed for the identification and verification of nests, while comparative descriptions and diagrams of eight freshwater turtle eggs were also provided. The study emphasizes the need for immediate designation of P. peninsularis as an ecosystem-disturbing species due to its local establishment and potential negative impact on native ecosystems.
Article
Ornithology
Sang-Yeon Lee, Junseok Lee, Ha-Cheol Sung
Summary: The occurrence of the Great Spotted Woodpecker and the Grey-headed Woodpecker in South Korea can be explained by differences in forest structures and food sources. The Great Spotted Woodpecker prefers forests with at least 75% coniferous trees, while the Grey-headed Woodpecker avoids forested areas with canopy cover exceeding 50%. Both species show a strong positive correlation with the species richness of forest birds.
Article
Behavioral Sciences
Dong-Yun Lee, Ju-Hyun Lee, Woo-Yuel Kim, Ha-Cheol Sung
Summary: In bi-parental species, breeding pairs cooperate to regulate incubation duration through nest-relief behavior, using vocal signals to communicate when exchanging incubation duties. This study examines the vocalizations and behaviors of Kentish plovers during nest-relief. It found that Kentish plovers make use of specific call types during nest relief, with the agonistic call type being the most commonly used, and there were no sex differences in the frequency of initiating calls.
JOURNAL OF ETHOLOGY
(2023)