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ISSN : 1225-3480
동합금이 사육 생물에게 미치는 생리적 영향을 조사하기 위해 화학적 조성이 다른 5종류의 금속판을 넣은 수조에서 사육한 북방전복을 대상으로 성패와 치패의 생존율, 호흡 및 배설률 그리고 기관별 중금속 축적률을 조사하였다. 생존율은 치패와 성패가 각각 27-60% 와 63-83%로 성패가 더 높게 나타났다. 합금 조성에 따른 생존율의 뚜렷한 차이는 나타나지 않으나 중금속 축적률 그리고 영양적인 스트레스 등을 고려하면 동합금망은 전복 양성을 위한 가두리로서는 적합하지 못할 것으로 사료된다.
In order to investigate the effects of copper alloy on abalone physiology, we studied survival rate, respiration, excretion rate, and heavy metal accumulation in each organ of adults and spats. The survival rate of spats and adults showed 27-60% and 63-83% respectively, higher survival rate in adults. In particular, 100% of copper panel led to lowest survival rate and there was no sharp distinction according to copper alloy composition. The respiration rate and excretion rate of ammonia nitrogen was 1.81 mg O2/g D.W./h and 0.43 mg NH4-N/g D.W./h respectively at 100% of copper panel. In other words, there was a high significant difference at the level, but no significant difference at other test levels (P < 0.05). The atomic ratio (0: N) hit the lowest at the 100% of copper panel showing 3.79 and no significant differences were seen among other test groups with 6.57- 7.18 of a very low range. This means that the species might have undergone nutritional stress. In case of copper accumulation, the 100% copper panel group showed the highest level in hepatopancreas and muscle showing 6.91 mg/kg and 1.60 mg/kg respectively but the rest of groups showed similar levels. Zinc accumulation raised at Cu-Zn alloy panel had high significance showing 18.50 mg/kg and 1.10 mg/kg in hepatopancreas and muscle respectively (P < 0.05). To sum up, a cage net made of 100% pure copper is expected to have a negative effect on abalone in light of survival rate, heavy metal accumulation, and atomic ratio (0: N). Moreover, given that the substratum used for the high adhesive species and nutritious stress that is represented through the atomic ratio need to be considered, the copper alloy net is thought not to be suitable for abalone aquaculture.
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