{"title":"Effects of hypoxia upon respiration and circulation in the dogfish Scyliorhinus stellaris","authors":"J. Piiper, Doris Baumgarten, M. Meyer","doi":"10.1016/0010-406X(70)91027-3","DOIUrl":null,"url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. Changes in respiration and circulation induced by hypoxia were studied in the dogfish <em>Scyliorhinus stellaris</em> (L.) by reducing the O<sub>2</sub> pressure in ambient water from 142 mm Hg to 54 mm Hg. The following changes were observed in hypoxia: (a) O<sub>2</sub> uptake decreased markedly. (b) Respiratory rate did not change significantly, but the ventilation increased, showing a maximum at moderate hypoxia. (c) Heart rate decreased, and cardiac output measured according to the Fick principle also showed a slight tendency to decrease. (d) Mean blood pressure in the ventral aorta and in peripheral arteries decreased.</p></span></li><li><span>2.</span><span><p>2. These effects of hypoxia are mostly in agreement with those found in other elasmobranchs but differ in many respects from changes observed in teleosts.</p></span></li></ul></div>","PeriodicalId":78189,"journal":{"name":"Comparative biochemistry and physiology","volume":"36 3","pages":"Pages 513-520"},"PeriodicalIF":0.0000,"publicationDate":"1970-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0010-406X(70)91027-3","citationCount":"59","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Comparative biochemistry and physiology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0010406X70910273","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 59
Abstract
1.
1. Changes in respiration and circulation induced by hypoxia were studied in the dogfish Scyliorhinus stellaris (L.) by reducing the O2 pressure in ambient water from 142 mm Hg to 54 mm Hg. The following changes were observed in hypoxia: (a) O2 uptake decreased markedly. (b) Respiratory rate did not change significantly, but the ventilation increased, showing a maximum at moderate hypoxia. (c) Heart rate decreased, and cardiac output measured according to the Fick principle also showed a slight tendency to decrease. (d) Mean blood pressure in the ventral aorta and in peripheral arteries decreased.
2.
2. These effects of hypoxia are mostly in agreement with those found in other elasmobranchs but differ in many respects from changes observed in teleosts.
1.1. 通过将环境水中O2压力从142 mm Hg降低到54 mm Hg，研究了低氧对星角鲨呼吸和循环的影响，结果表明:(a)低氧条件下，星角鲨对O2的吸收明显减少。(b)呼吸频率无明显变化，但通气量增加，在中度缺氧时最大。(c)心率下降，根据菲克原理测量的心输出量也有轻微下降的趋势。(d)腹主动脉和外周动脉平均血压下降。这些缺氧的影响大多与其他板鳃动物一致，但在许多方面与硬骨鱼观察到的变化不同。
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