Relationship between Coelomic Pressure and Ventilation in the Respiratory Tree of the Japanese Common Sea Cucumber, Apostichopus japonicus
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概要
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Relationship between coelomic pressure and ventilation in the respiratory tree of the Japanese common sea cucumber, <I>Apostichopus japonicus</I> was examined. Inhalation volume per ventilation (Vg-in) and inhalation period per ventilation increased with increase of inhalation frequency per ventilation (If) . However, the minimum and maximum values of coelomic pressure (Pco) per ventilation, and ventilation volume per min (Vg) were constant. And the exhalation and inhalation from/into the respiratory tree started when Pco increased in 7.9-8.1 mmH<SUB>2</SUB>O and decereased in 3.5-4.0 mmH<SUB>2</SUB>O, respectively. The ventilation stopped when the body wall was strongly pushed, and resumed when Pco was lowered in 7.6-7.8 mmH<SUB>2</SUB>O. From the results, the sea cucumber should be proven that Vg maintains constant, even if the size of body changes, by adjusting Vg-in to the fixed Pco (7.9-8.1 mmH<SUB>2</SUB>O) with If.
- 日本水産増殖学会の論文
日本水産増殖学会 | 論文
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