CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS*
Abstract: The cardiac responses of the Antarctic fishes Notothenia 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...
Main Authors: | , , , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.549.4669 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1998-Bastos.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.549.4669 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.549.4669 2023-05-15T13:37:32+02:00 CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS* Wilma Pereira Bastos-ramos Neuza Maria Ferraz Mello Gongalves Metry Bacila S. Jon Dos Campos Szo Paulo The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.549.4669 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1998-Bastos.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.549.4669 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1998-Bastos.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1998-Bastos.pdf text ftciteseerx 2016-01-08T11:26:42Z Abstract: The cardiac responses of the Antarctic fishes Notothenia 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'C to- 1.8 C. 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 T and final- 1. S T for cholinesterase assay. Results showed that: 1. A temperature decrease from +2.O0C to-- 1. 8 T significantly depressed cardiac rate, from 26.9k2.7 to 5.2+ 1.4 b e a t s m i n ' in N. neglecta and from 19.0 to 3.0 b e a t s m i n ' in C aceratus. In one specimen of N. neglecta. a reversible cardiac arrest of 3.0min 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'C immediately ceased bradycardia; 3. Administration of atropine reversed Text Antarc* Antarctic Unknown Antarctic The Antarctic |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract: The cardiac responses of the Antarctic fishes Notothenia 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'C to- 1.8 C. 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 T and final- 1. S T for cholinesterase assay. Results showed that: 1. A temperature decrease from +2.O0C to-- 1. 8 T significantly depressed cardiac rate, from 26.9k2.7 to 5.2+ 1.4 b e a t s m i n ' in N. neglecta and from 19.0 to 3.0 b e a t s m i n ' in C aceratus. In one specimen of N. neglecta. a reversible cardiac arrest of 3.0min 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'C immediately ceased bradycardia; 3. Administration of atropine reversed |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Wilma Pereira Bastos-ramos Neuza Maria Ferraz Mello Gongalves Metry Bacila S. Jon Dos Campos Szo Paulo |
spellingShingle |
Wilma Pereira Bastos-ramos Neuza Maria Ferraz Mello Gongalves Metry Bacila S. Jon Dos Campos Szo Paulo CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS* |
author_facet |
Wilma Pereira Bastos-ramos Neuza Maria Ferraz Mello Gongalves Metry Bacila S. Jon Dos Campos Szo Paulo |
author_sort |
Wilma Pereira Bastos-ramos |
title |
CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS* |
title_short |
CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS* |
title_full |
CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS* |
title_fullStr |
CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS* |
title_full_unstemmed |
CHOLINERGIC BRADYCARDIA TEMPERATURE INDUCED IN ANTARCTIC FISHES NOTOTHENIA NEGLECTA AND CHAENOCEPHALUS ACERATUS* |
title_sort |
cholinergic bradycardia temperature induced in antarctic fishes notothenia neglecta and chaenocephalus aceratus* |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.549.4669 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1998-Bastos.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1998-Bastos.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.549.4669 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1998-Bastos.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766093427278086144 |