마리조개, Gomphina veneriformis, 의 養殖을 위한 生態學的 硏究 : 1.마리조개의 産卵期와 人工受精 및 發生에 關하여 1. Studies on the spawning season, arttificial fertilization and egg development = Ecological studies for the culture of the Clam, Gomphina veneriformis

국문 초록 (Abstract)

1975年 3月부터 12月末까지 Gomphina veneriformis의 養殖을 위한 生態學
的 硏究의 一部로서 同年 5月부터 7月에 걸쳐 濟州 大學 臨海硏究所에서 實施했고 그 結과는 다음과 같다.
1. 濟州汎岸産 Gomphina veneriformis의 産卵期는 6月末에 最盛期였고 8月
까지 계속되었다.
2. 卵의 成熟率은 6月 25日에 最高였고 成熟率은 44.4%였다.
3. 人工放卵. 放精에 使用한 NH₄OH 및 NH₄CL海水溶液은 ??에서 效果的이었고 高濃度에서는 非正常的이었다.
4. ?? 海水溶液에 처리한 후 受精시켜 受精後 35分 2細胞期 1時間 50分에 4細胞期, 4時間20分에 襄胚期, 5時間40分에 擔輪子期, 47時間後에 初期 殼項幼生을 관찰할 수 있었다.
끝으로 本 硏究는 財團法人 産學協同 財團의 硏究費로 實施한 一部이며, 協助해준 財團側에 感謝하는 바입니다.

다국어 초록 (Multilingual Abstract)

The present study was conducted along the inter-tidal flats of Jeju Island over the period of May to July 1975. It was done as the one subject on the ecological study for the culture of the Clam, Gomphina veneriformis. Results obtained are as follows:
1. The spawning period of Gomphina veneriformis was inferred to be from late June
to August with peak from late June to early July.
2. The egg maturation was highest around 25,June.
3. During the spawning season, Gomphina veneriformis successfully spawned when treated with suitable concentration of NH₄CL-sea water and NH₄OH-sea water solution. The optimum concentration were obtained ?? NH₄OH-sea water and NH₄CL-sea water solution.
4. The fertilization was demonstrated by individuals treated with ?? -NH₄Cl- sea water solution, and the fertilized eggs followed normal development, i.e.,2-Cell stage in 35 minutes after fertilization, 4-Cell stage after 1,8 hrs., gastrula stage after 4.3 hrs., trochophore stage after 5.6 hrs., early straight hinge stage after 23,8 hrs., and early umbo stage after 47 hrs.