札幌近郊に見られる繊毛虫(Ciliata)
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The present survey was carried out during the period from April, 1955 to December, 1958, with special attention to the distribution and seasonal change of Ciliata in the city of Sapporo. In this survey, four types of populations were classified as follows: 1)foul water population, 2)clear pond water population, 3)stagnant water population and 4)population adapted to the above three types. 1)Population of the foul water contains the following species: Paramecium polycaryum, Colpidium colpoda, Chilodonella cucullulus, Dileptus anser, Prorodon teres, Spathidium sp., Lacrymaria sp., Vorticella campanula and Vorticella spp. 2)Population of the clear pond water comprises the following species: Paramecium bursaria, Lionotus fasciola, Loxophyllum faurei, Coleps hirtus, Ichthyophthirius multifiliis, Uroleptus spp., Stentor igneus, Stentor polymorphus and Bursaria truncatella. 3)The species found in the stagnant water population are Paramecium aurelia and Colpoda cucullus. 4)In the population adapted to the three types, the following species are observed: Paramecium caudatum, Frontonia leucus, Didinium nasutum, Stylonychia steini, S. mytilus and Urostyla grandis. The following five patterns in seasonal variation of ciliates were classified: A)species showing a slight or no seasonal change all the year around, B)species appearing only in the period ranging from May to the middle of June, C)species common from early autumn to winter, D)species collected in both B and C, and E) species collected exclusively during from late spring to late summer. 1)The species belonging to A-pattern are: Paramecium caudatum, Colpidium colpoda, Frontonia leucus, Stylonychia steini, S. mytilus and Urostyla grandis. 2)In B-patten Paramecium bursaria and Bursaria truncatella are remarkable. 3)There occur in C-pattern Didinium nasutum, Lionotus fasciola and Colopoda cucullus. 4)D-pattern contains the following species: Paramecium polycaryum, P. aurelia, Prorodon teres, Dileptus anser, Spirostomum ambiguum, Stentor polymorphus and Stentor igneus. 5)The species found in E-pattern is Ichthyophthirius multifiliis. The seasonal variation in population density of ciliates was analyzed in comparison with several limiting factors such as temperature, oxygen and biogenic nutrients. Changes of temperature seem to be correlated with variations in population density of ciliates, especially, of the stenothermal species such as Paramecium bursaria and Ichthyophthirius multifiliis. The species found in the clear pond water are much more affected by the changes of oxygen concentration than those living in the foul water. Biogenic salts such as nitrates and phosphates seem to be the most important factors limiting population densities.
- 社団法人日本動物学会の論文
- 1959-06-15
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