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Respiratory responses of the striped mullet, Mugil cephalus (L.) to hypoxic conditions *
Author(s) -
Cech Joseph J.,
Wohlschlag Donald E.
Publication year - 1973
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1973.tb04471.x
Subject(s) - mugil , biology , hypoxia (environmental) , mullet , respiration , ventilation (architecture) , respiratory system , gill , tidal volume , oxygen , respiratory rate , stroke volume , medicine , zoology , fishery , anatomy , endocrinology , heart rate , chemistry , fish <actinopterygii> , mechanical engineering , organic chemistry , blood pressure , engineering
Ventilation volume, ventilatory frequency, ventilatory stroke volume, percentage utilization of oxygen and respiratory metabolism were measured on unanaesthetized striped mullet, Mugil cephalus L., under ambient and hypoxic conditions with a modified van Dam respiration chamber. Hypoxia caused a statistically significant increase in ventilation volume, ventilatory frequency, and ventilatory stroke volume and a significant decrease in percentage utilization of oxygen. The routine rate of respiratory metabolism was not significantly altered by hypoxia. These responses probably represent ventilatory adjustments which serve to maintain a constant oxygen supply to the gills under conditions of oxygen depletion.