살조개, protothaca jedoensis의 成長에 따른 形態變異에 對하여

On morphological variations of Venus clam, protothaca jedoensis according to its growth

The study on morphological variations of Venus clam, Protothaca jedoensis according to its growth caught at Dumunpo and Baegyang located at the south coast of Korea was carried out from Septemper, 1994 to August, 1995. The obtained results were as follows: 1. The relationship between the shell length and the shell height: Dumunpo clam Y = -0.319 ＋ 0.893X(r = 0.964) Baegyang clam Y = -0.832 ＋ 0.854X(r = 0.954) The relationship between the shell length and the shell breadth: Dumunpo clam Y = -3.817 ＋ 0.645X(r = 0.941) Baegyang clam Y = -1.206 ＋ 0.602X(r = 0.890) The relationship between the shell length and the total weight: Dumunpo clam Y = 0.000157X³ ¹⁸⁵(r = 0.967) Baegyang clam Y = 0.000396X² ⁹³⁰(r = 0.962) 2. As shown in the above products, differences between the shell breadth to the shell length and the total weight to the shell length were remarkable. However, regarding to the shell height to the shell length, no differences have been out. The growth was more rapid at the coast of Dumunpo than at Baegyang. 3. The Venus clam shows quite different characteristics depending on with growing environments. This seems to reflect that the shape of the Venus clam is influenced by its environments.