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CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS (19th Symposium on Polar Biology)
https://doi.org/10.15094/00005363
https://doi.org/10.15094/00005363c0192f47-dfaa-44d1-b6fa-178378fad31e
名前 / ファイル | ライセンス | アクション |
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KJ00000767706 (1.2 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1998-02-01 | |||||
タイトル | ||||||
タイトル | CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS (19th Symposium on Polar Biology) | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Antarctic fish | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | cholinergic bradycardia | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | fish cardiac arrest | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Notothenia neglecta | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Chaenocephalus aceratus | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00005363 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
記事種別(英) | ||||||
en | ||||||
Proceeding | ||||||
論文名よみ | ||||||
その他のタイトル | CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS (19th Symposium on Polar Biology) | |||||
著者名(英) |
BASTOS-RAMOS, Wilma Pereira
× BASTOS-RAMOS, Wilma Pereira× GONCALVES, Neuza Maria Ferraz de Mello× BACILA, Metry |
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著者所属(英) | ||||||
en | ||||||
Departamento de Ciencias Fisiologicas, Faculdade de Odontologia, Umversidade Estadual Pauhsta (UNESP) | ||||||
著者所属(英) | ||||||
en | ||||||
Departamento de Medicina, Centra de Ciencias Biologicas e da Saude, Pontificia Universidade Catolica do Parana | ||||||
著者所属(英) | ||||||
en | ||||||
Laboratono de Piscicultura, Departamento de Zootecnia, Umversidade Federal do Parana | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The cardiac responses of the Antarctic fishes Notothema neglecta and Chaenocephalus aceratus to acute changes of temperature were studied. The fishes were surgically prepared for electrocardiogram (ECG) recording and placed in a three hour experiment in an experimental chamber containing aerated marine water. The temperature was controlled from +2℃ to -1.8℃. Presence of nitrites in the fish bath was monitored. Atropine and epinephrine were administered into the abdominal cavity through a surgically inserted cannula. Blood samples were taken at initial +2.0℃ and final -1.8℃ for cholmesterase assay. Results showed that: 1. A temperature decrease from +2.0°C to~-1.8℃ significantly depressed cardiac rate, from 26.9±27 to 5.2±1.4 beats min^<-1> in N neglecta and from 19.0 to 3.0 beats min^<-1> in C aceratus. In one specimen of N. neglecta, a reversible cardiac arrest of 3.0mm was observed. ECG waves did not change during the experiments, except the QRS to QRS or the Q-T intervals at lower temperatures. Respiratory rate was not significantly influenced by temperature, 2. Return of temperature to +1.5/2.0℃ immediately ceased bradycardia, 3. Administration of atropme reversed bradycardia within 5 min; 4. Serum cholmesterase activity decreased at the lowest temperature; 5. Epinephrine neither influenced the cardiac rate at any temperature nor altered cardiac waves. Results demonstrate that severe bradycardia at subzero temperatures is not only an intrinsic cardiac response to cold, but an active one, due to the higher cholinergic tone, that was not observed in the resting state at +2.0℃. No adrenergic influence on heart chronotropism has been found. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10819561 | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Polar Biology 巻 11, p. 51-61, 発行日 1998-02 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |