Difference in the hypoxia tolerance of the round crucian carp and largemouth bass: Implications for physiological refugia in the macrophyte zone

The hypoxia tolerance of larval and juvenile round crucian carp, Carassius auratus grandoculis, and largemouth bass, Micropterus salmoides, was determined using respirometry to examine the potential of hypoxic areas in the macrophyte zone as physiological refugia for round crucian carp. The toleranc...

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Bibliographic Details
Published in:Ichthyological research 2007-08, Vol.54 (3), p.308-312
Main Authors: Yamanaka, H.(Kyoto Univ., Otsu (Japan). Center for Ecological Research), Kohmatsu, Y, Yuma, M
Format: Article
Language:English
Subjects:
ANOXIA
ANOXIE
AQUATIC PLANTS
CARASSIUS AURATUS
DEPREDACION
Fish
Freshwater
HABITAT
HABITATS
Hypoxia
MICROPTERUS SALMOIDES
Physiology
PLANTAS ACUATICAS
PLANTE AQUATIQUE
PREDATION
Refugia
TOLERANCE
TOLERANCIA
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Summary:The hypoxia tolerance of larval and juvenile round crucian carp, Carassius auratus grandoculis, and largemouth bass, Micropterus salmoides, was determined using respirometry to examine the potential of hypoxic areas in the macrophyte zone as physiological refugia for round crucian carp. The tolerance, which was measured as the critical oxygen concentration (Pc), was 1.32mg O^sub 2^/l in the round crucian carp and 1.93mg O^sub 2^/l in the largemouth bass. As the round crucian carp tolerated hypoxia better than the largemouth bass, hypoxic areas in the macrophyte zone might function as physiological refugia for round crucian carp.[PUBLICATION ABSTRACT]
ISSN:1341-8998
1616-3915
DOI:10.1007/s10228-006-0400-0