A Comparative Study of the Pattern of Bryozoan Colony Growth

用数学方法分析了黑膜虫的菌落生长规律。结果表明：(1)亲本动物的出芽类型对子代动物的出芽类型影响不大。基于概率的l系统分析的应用澄清了这一点。(2)每个动物保持自己的孔口与周围动物孔口之间的最大距离。这一结果是由一个群体中存在的动物体长变异间接引起的。(3)无论动物大小，每个动物都有足够的触手扩张面积。(4)蜂群中的孔口排列不紧密，排列不紧密。结果表明，形面面积的变化幅度大于面多边形面积的变化幅度。每一种动物都倾向于把它的触手冠包括一点。这种行为使得进食效率很高。本研究获得的所有数据都一致地告诉我们，一个serrilamella膜孔菌群体的动物是有规律地排列的，以使它们的摄食效率高。这一生存原理可应用于苔藓虫进化的研究。

Colony grouth pattern of a cheilostomebyozoan Membranipora serrilamella was mathematically analyzed. Some rules of zooids buddingwere revealed as follows :(1) The budding type of parent zooid does not so much infruence thebuding type of daughter zooid. This was clarified by the application of the L-systme analysis bsed on probability.(2) each zooid keeps the maximum distance betrween its own orifice and the orifices of the sorrounding zooids. This resultwas indirectly brought by the present of variation of the zooid length in a colony.(3) There are sufficient area for tentacle expansion of each zooid whether the zooid is big or small.(4) Orifices in a colonyare not arranged in closest byt closer packing. This was revealed by the result that the variation range of the area of zooid exceeds that of the area of boronoy polygon.(5) Each zooid tends to include its tentacle crown a little. This behavior makes the food intake efficiency high.All of the data obtained by the present stucy consistently tell us that the zooids of a colony of Membranipora serrilamella are reglarly arranged in order to make their food intake efficiency high. This principle for existence can be applied for the study of bryozoan evolution.