著者

Kaito Kotani Kandai Doi Nana Ushine Takuya Kato Tatsuo Sato Masaki Nonagase Shin-ichi Hayama

出版者

The Japan Society of Medical Entomology and Zoology

雑誌

衛生動物 (ISSN:04247086)

巻号頁・発行日

vol.73, no.4, pp.157-159, 2022-12-25 (Released:2022-12-25)

参考文献数

20

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An engorged ixodid tick was collected from a rescued short-tailed shearwater, Puffinus tenuirostris (Temminck), at Funabashi Sanbanse Seaside Park in Chiba Prefecture, Japan. Based on morphological features, we identified the specimen as Ixodes kerguelenensis (André and Colas-Belcour), which is a species known to infest seabirds in Oceania. To our knowledge, this is the first case report of I. kerguelenensis in Japan. The case of infestation to the shearwater suggests the possibility of the long-distance translocation of the tick in Oceanian region to Japan.

著者

Nana Ushine Shouta MM Nakayama Mayumi Ishizuka Takuya Kato Shin-ichi Hayama

出版者

The Japanese Society of Environmental Toxicology

雑誌

環境毒性学会誌 (ISSN:13440667)

巻号頁・発行日

vol.26, pp.25-37, 2023-06-22 (Released:2023-06-22)

参考文献数

83

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Lead (Pb) is extensively used in industries and often inadvertently discharged into the environment. Despite some studies examining the effects of Pb pollution on raptors and waterfowl, its effects on other avian species have not been investigated. This study investigated the feeding selectivity of a black-headed gull (Chroicocephalus ridibundus) population using stable isotope ratios to determine the source of Pb pollution. Gulls in Tokyo and Mikawa Bay were captured from December 2016 to February 2017 and from December 2020 to March 2021, respectively. These gulls were measured 13C/12C carbon ratio (δ13C), and 15N/14N nitrogen ratio (δ15N). Blood Pb level (BLL) was measured gulls in Mikawa Bay. Based on the measurement values of δ15N, gulls were classified into two groups: primary and higher predator groups. No differences in stable isotope ratios were found between the two groups. The secondary consumers showed significantly high BLLs (P=0.002). BLLs during the wintering period were significantly higher in the primary consumer group. Our findings suggest that reducing Pb emissions, along with biological and chemical remediation of water sediment is required to prevent further Pb pollution and bioaccumulation in wild animals.

著者

Nana USHINE Aki TANAKA Shin-ichi HAYAMA

出版者

JAPANESE SOCIETY OF VETERINARY SCIENCE

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.82, no.8, pp.1173-1177, 2020 (Released:2020-08-28)

参考文献数

40

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Investigating the cause of animal death is helpful to understand the reasons behind the interactions and conflicts between humans and animals. To further develop the cause of death investigation, we report a case of a Chinese spot-billed duck (Anas zonorhyncha) which hatched from a rescued duck and died 10 days after release. We inspected the duck’s cause of death using an interview of concerned people, external body examination, necropsy, and genetic examinations. Based on the fractures, the main cause of death was determined to be a traffic accident. Furthermore, molecular tests helped to detect raccoon DNA in the visible bite wounds. This case shows that molecular biological method is one of the methods of clarify the animals’ cause of death.