Filtration and O₂ consumption related to the periodic activity of fresh water mussel (Anodonta cygnea L.)

Salánki, János and Lukacsovics, Ferenc (1967) Filtration and O₂ consumption related to the periodic activity of fresh water mussel (Anodonta cygnea L.). A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 34. pp. 85-98. ISSN 0365-3005

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Abstract

The relations between the mussel’s water purification and oxygen consumption related to the animals’ characteristic activity rhythm were investigated. It was found: 1. The filtration measured with indirect method occurs during the active period, when the shells are rhythmically active; 2. The oxygen consumption during the active period is 5-l0fold higher than in the rest period when the shells are closed; 3. The neutral red method for filtration, developed by Cole and H epper (1953) is not suitable to obtain quantitative values; 4. Saturation with neutral red as well the removing of shell around the sypho increase the activity of the animals. The fact that the mussel’s activity is not continuous but lasting intervals caused by different factors interrupt the open state, make the results of experiments questionable where no simultaneous activity registration were performed. These data seem the less acceptable the more they are related to results obtained on single individuals and from short lasting measurements in respect the whole year-sedimentation of the total mussel population in the biotops.

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