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RESPIRATORY AND CARDIOVASCULAR RESPONSES OF TWO SPECIES OF DEEP-SEA CRABS, CHACEON FENNERI AND C. QUINQUEDENS, IN NORMOXIA AND HYPOXIA

RESPIRATORY AND CARDIOVASCULAR RESPONSES OF TWO SPECIES OF DEEP-SEA CRABS, CHACEON FENNERI AND C.... and The basic mechanisms of crustacean res- piration, ventilation, and cardiovascular function have been the subjects of extensive investigation for more than a decade, es- pecially among the decapods (for review, see Taylor, 1982; Cameron and Mangum, 1983; McMahon and Wilkens, 1983; McMahon, 1988). The picture that has emerged is one of a common mechanism that displays a graded pattern of responses to varying en- vironmental conditions. One of the most commonly studied environmental variables has been low oxygen tensions. In response to declining oxygen tensions, decapods show one of two general patterns: (1) animals exhibiting oxy-independent res- piration, maintaining normal rates of oxy- gen uptake (M02), or (2) animals exhibiting oxy-dependent respiration, in which 1VI02 declines with ambient oxygen tension (Mangum and Van Winkle, 1973). These two patterns have also been termed oxyreg- ulation and oxyconformity, respectively (Taylor, 1982). Most decapods display some degree of oxy-independent respiration with MO2 being maintained by a combination of hyperventilation and increased stroke vol- ume of the heart. This preserves both the P02 gradient across the gills and hemo- lymph P02 until ambient oxygen tensions reach a critical low value (Mangum and Van Winkle, 1973; Taylor, 1976, 1982; Mc- Mahon and http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Crustacean Biology Brill

RESPIRATORY AND CARDIOVASCULAR RESPONSES OF TWO SPECIES OF DEEP-SEA CRABS, CHACEON FENNERI AND C. QUINQUEDENS, IN NORMOXIA AND HYPOXIA

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References (30)

Publisher
Brill
Copyright
Copyright 1990 by Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0278-0372
eISSN
1937-240X
DOI
10.1163/193724090X00294
Publisher site
See Article on Publisher Site

Abstract

and The basic mechanisms of crustacean res- piration, ventilation, and cardiovascular function have been the subjects of extensive investigation for more than a decade, es- pecially among the decapods (for review, see Taylor, 1982; Cameron and Mangum, 1983; McMahon and Wilkens, 1983; McMahon, 1988). The picture that has emerged is one of a common mechanism that displays a graded pattern of responses to varying en- vironmental conditions. One of the most commonly studied environmental variables has been low oxygen tensions. In response to declining oxygen tensions, decapods show one of two general patterns: (1) animals exhibiting oxy-independent res- piration, maintaining normal rates of oxy- gen uptake (M02), or (2) animals exhibiting oxy-dependent respiration, in which 1VI02 declines with ambient oxygen tension (Mangum and Van Winkle, 1973). These two patterns have also been termed oxyreg- ulation and oxyconformity, respectively (Taylor, 1982). Most decapods display some degree of oxy-independent respiration with MO2 being maintained by a combination of hyperventilation and increased stroke vol- ume of the heart. This preserves both the P02 gradient across the gills and hemo- lymph P02 until ambient oxygen tensions reach a critical low value (Mangum and Van Winkle, 1973; Taylor, 1976, 1982; Mc- Mahon and

Journal

Journal of Crustacean BiologyBrill

Published: Jan 1, 1990

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