The effect of flight on the composition of haemolymph in the cockroach, Periplaneta americana
The composition of the haemolymph in Periplaneta americana is markedly altered during the 6 h following a 10-min flight. Normal resting conditions are not re-established for at least 24 h. The haemolymph volume increases 30% between 1 and 6 h after flight while the concentration of Na +, remains con...
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Published in | Journal of insect physiology Vol. 32; no. 7; pp. 649 - 655 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier Ltd
1986
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | The composition of the haemolymph in
Periplaneta americana is markedly altered during the 6 h following a 10-min flight. Normal resting conditions are not re-established for at least 24 h. The haemolymph volume increases 30% between 1 and 6 h after flight while the concentration of Na
+, remains constant. Within 2 min after the beginning of flight there is a significant increase in the concentration of K
+ followed by an increase in Ca
2+ and Mg
2+ at the time flight is terminated. The increase in volume of the haemolymph is accompanied by a 25% decrease in osmolarity. Twenty-four hours after flight both haemolymph volume and osmolarity are re-established at the pre-flight values. During the return of fluid volume and osmolarity to normal levels, the ion concentrations, with the possible exception of Na
+, are kept constant. The concentration of trehalose increases 10% during the first 2 min of flight, then decreases to the resting level within 5 min after flight ceases. Twenty minutes after flight the concentration of trehalose rises again, to 35% above the resting level where it remains for at least a day. At 1 day after flight the total trehalose in the haemolymph pool has returned nearly to the pre-flight level. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0022-1910 1879-1611 |
DOI: | 10.1016/0022-1910(86)90095-8 |