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卞忠圭,盧暹,孫松正 濟州大學校海洋資源硏究所 1986 해양과환경연구소 연구논문집 Vol.10 No.-
濟州道産 소라, Batillus Cornutus (LIGHT FOOT)의 種苗量産을 爲하여 濟州大學校 海洋資源硏究所 및 國立水産振興院 濟州培養場에서 1985年 7月부터 8月 사이에 南濟州 近海에서 採集된 殼高 51.9∼93.1mm의 母貝 387마리를 利用하여 7 回의 産卵誘發刺戟을 實施하였다. 알의發生 및 浮游幼生, 採苗, 附着幼生의 飼育過程에 따른 成長 및 生殘率 等에 關한 結果를 要約하면 다음과 같다. 1. 産卵誘發刺戟으로서 刺戟前夜의 止水處理에 의한 干出, 紫外線照射海水刺戟을 竝行한 方法이 확실히 效果的이었다. 2. 同 方法에 의한 使用母貝의 反應率은 10.42∼36.84%였으며 受精率의 範圍는 71.45∼93.02%였다. 3. 産卵量에 對한 孵化率의 範圍는 63.25∼80.12%였다. 4. 採苗器 設置方法에 따른 浮游幼生의 採苗器當 平均 看生數는 垂直採苗에서 367.38±67.58個體(0.31개個體/㎠)였으나, 水平採苗의 경우는 428.25±318.50個體(0.36個體/㎠)로서 後者가 더 良好하였다. 5. 水槽壁面 着生된 附着稚貝의 垂直分布는 孵化後 70日까지는 附着硅藻의 着生이 많은 水面에서 30cm사이에 出現稚貝의 90.14%가 集中되었다. 6. 秋季採苗에서의 소라稚貝의 孵化後 70日間 飼育에서의 經過日數(D)에 따른 殼徑(S)의 成長關係式은 小型圓形水槽 (φ1.6×0.7m)의 경우 S=0.0090 D+0.4236, 四色水槽 (2.5×1×0.7m)의 경우 S=0.0109D+0.4253의 回歸直線式으로 名名 表示되었다. 7. 附着以後 稚貝의 大量斃死現象은 孵化後 20 日以內에 볼 수 있었고 이때의 生殘率은 圓形水槽에서 49.28%, 四色水槽에서 40.36%였으며 孵化後 70日間의 最終 生殘率은 前者에서 9.11%, 後者의 경우 8.93%였다. For the purpose of mass s production of the seedling of top shell, Batillus cornutus (LIGHT FOOT) in Cheju Do, 387 samples were collected at the southern coast of Cheju Island. Their shell height were ranged 51.9-93.1mm and the experiment to stimulate the spawning induction were excuted 7 times during the period of July, 1985 and August, 1985. The results of egg development, planktonic larvae seed collection, growth and survival rate in relation to the rearing process of settling larvae were as follows: 1. The method of induced spawning stimulation which practiced drying by means of non-circulation on the night before stimulation while irradiating the seawater with ultra-violet ray was most effective. 2. The range of response rate, and fertilization rate of samples by the above method was 10.42%∼36.84% and 71.45%∼93.02% respectively. 3. The range of fertilization rate against spawning was 63.25%∼80.12%. 4. The average of settling numbers per swimming larvae collector in relation to collector set-up method were 367.38±67.58 individual (0.31 individual/㎠) and 428.25±318.50 individual (0.36 individual/㎠) in vertical and horizontal settling respectively. 5. Vertical distribution of attached young top shell on the wall surface in aquarium was 90.14% of total young top shell and this was appeared between the water surface and 30cm depth which was abundant in settling of attatched diatom up 70 days after hatching. 6. The growth relationship equations between shell diameter and growth of 70 days after hatching of young top shell in autumn collection were the linear regression line of S=0.0090D+0.4236 and S=0.0109D+0.4253 in case of small circular aquarium (ψ1.6×0.7m) and rectangular one (2.5×1×0.7m) respectively. 7. Mass motality of young top shell after attatching was detected within 20 days after hatching. Survival rates were 49.28% and 40.36% in circular aquarium and rectangular one respectively. During this period while percentages of survival after 70 days were 9.11%, 8.93% in former and latter respectively.
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