Ciliary activity examinations after anoxybiosis on the isolated gills of Anodonta cygnea L.

Lukacsovics, Ferenc (1966) Ciliary activity examinations after anoxybiosis on the isolated gills of Anodonta cygnea L. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 33. pp. 95-102. ISSN 0365-3005

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Abstract

Anodonta cygnea specimens were kept for 1-3 days under anoxybiotic (AOB) conditions and then after AOB immediately or in 1-2 days, during which the mussels were kept in water rich in oxygen, the mechanical activity in February-March 1966 with the metal plate method of Schlieper et al. (1958). While raising the temperature from that of the natural environment (+4-+7° C) gradually to 25° C the activity of the gill cilia was measured also at every 5° C. The following results were obtained: 1. At temperatures of 10, 15 and 20° C the ciliary activity increased together with the temperature, but at 25° C already a decreasing activity could be measured (Fig. 1) the cause of which may be “heat shock” which occurs also in other, marine Lamellibranchiata species. 2. On the zero day after each 1-3 day of AOB effect a substantial increase of transport velocity appeared as compared with the control, in direct proportion with the period spent in AOB. 3. Upon a one day aeration effect after AOB the mechanical activity of the ciha generally did not decrease, only in the mussels kept for 3 days under AOB conditions, but also here the performance was still significantly higher than in the control (Fig. 2). 4. Upon the effect of 2 days aeration after AOB the transport performance agreed with the value of the control. 5. It is assumed that the contradiction between the O₂ hunger of the gill tissue appearing with a time shift after AOB and the immediately appearing ciliary transport arises from the more rapid response disposition of the cilia in contrast to the slower start of the mechanism of the oxidatory enzyme activity.

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