九孔幼貝放流為臺灣補充漁業資源方法之一，近年來經由各漁政機構，九孔放流量達百萬粒以上，但為瞭解九孔貝之改流後調查，需加以標誌。放流熊類之標誌國內外均有不少文獻探討，但九孔放流則則著墨者甚少。本文以刺飼石蓴及薄葉等綠色類，使九孔外殼上出現綠色環帶，並以不同月份及不同長短期間投飼，觀察其殼上綠色環帶狀況。可發現（1）於飼育綠色藻類時成長率及增長率稍慢之外，恢復飼育龍鬚菜時，迅速至與對照繆體長相近。（2）放流時，繼色藻類一個月的飼育期，綠色環帶寬約0.40cm∼0.50cm，與殼長比約18.77％∼21.3％。二個月的飼育期，綠色環帶寬約0.88cm，與殼長比約37.17％。（3）於四、五月間，石蓴等綠色藻類在海邊大量生長時，大量刮取飼育。估計45左右，其綠色環帶可長至0.5cm∼0.7cm寬，約佔殼長之30％左右，易於辨認，可供作再捕時之標誌。
Releasing fish and shellfish is one method used to supplement recruitment to fishery resources, and marking or tagging are common methods used to estimate survival rate of released organisms. One or two million juvenile Taiwanese abalone (Haliotis Diversicolor) have been released along rocky shores around northeastern Taiwan in recent years, but marking or tagging have been released along rocky shores around northeastern Taiwan in recent years, but marking or tagging have rarely been done to estimate their survival rate. The green algae Ulva sp. and Monostoma sp. grow abundantly off northeastern Taiwan during March and April, When H. diversicolor was fed a supplemental diet of these algae after a month, green rings of 0.40 cm to 0.50 cm in width, with a ratio of green rings approximately 18.77% to 21.33% of total shell length, appeared on their shells. When fed after two months, green rings of 0.88 cm, 37.17% of total shell length. Rings became larger with length of supplemental feeding. Estimate to feed these green algae, the width of green rings be 0.5 cm to 0.7 cm as a marking of releasing Taiwanese abalone. Though the growth rate of H. diversicolor was lower during supplemental green algae diets, by resuming a normal diet of brown algae (Gracilaria sp.) growth rate was increased and shell length was the same as that archived on a steady diet of brown algae before release.
