微电流对大鹏湾造礁石珊瑚种苗存活率及生长状况的影响

Effects of Micro-current on the Survival Rate and Growth Status of Coral Reef-building Coral Seedlings in Dapeng Bay

关键词:  微电流  造礁石珊瑚种苗  存活  生长

Key words:  micro-current  reef-building corals seedlings  survive  growth

摘要:

为研究造礁石珊瑚种苗在微电流作用下的存活和生长状况，以深圳市大鹏半岛大鹏湾霜鹿角珊瑚(Acropora pruinosa)、澄黄滨珊瑚(Porites lutea)、盾形陀螺珊瑚(Turbinaria peltata)、十字牡丹珊瑚(Pavona decussata)、膨胀蔷薇珊瑚(Montipora turgescens)为研究对象，在300 d的实验周期内，将电压为6、12、18 V的微电流分别作用于造礁石珊瑚种苗，分析比较不同电压微电流作用下各种造礁石珊瑚种苗的存活率及生长情况。在实验期间海水中pH值、溶解氧和营养盐的变化范围不大，微电流作用后，珊瑚脱落率由3.33%-6.67%降低到0.00%-5.00%，其中澄黄滨珊瑚6、12 V电压实验组的珊瑚脱落率降至0；珊瑚种苗存活率由91.67%-93.33%提升到93.33%-98.33%。不同种类的造礁石珊瑚生长率和生长速度受微电流促进效果不同，霜鹿角珊瑚的生长率最高，十字牡丹珊瑚的生长率最低；当电压为12 V时，微电流对霜鹿角珊瑚、十字牡丹珊瑚、澄黄滨珊瑚、膨胀蔷薇珊瑚、盾形陀螺珊瑚的存活状况和生长速度影响效果最佳。微电流通过促进造礁石珊瑚组织的延伸，降低了造礁石珊瑚种苗培育过程中的脱落率，并提高了造礁石珊瑚种苗的存活率和生长速度。

Abstract:

In order to study the survival and growth of reef-building coral seedlings under the action of micro-current,Acropora pruinosa,Porites lutea,Turbinaria peltata,Pavona decussata and Montipora turgescens in Dapeng Bay of Dapeng Peninsula of Shenzhen City were taken as the research objects.The micro-currents with voltages of 6,12 and 18 V were applied to the reef-building coral seedlings respectively,and the survival rate and growth of various reef-building coral seedlings under different voltage micro-currents were analyzed and compared.During the experiment,the pH value,dissolved oxygen and nutrients in seawater did not change much.After the action of micro-current,the coral shedding rate decreased from 3.33%-6.67% to 0.00%-5.00%.Among them,the coral shedding rate of the 6 and 12 V voltage experimental groups of Porites lutea decreased to 0.The survival rate of coral seedlings increased from 91.67%-93.33% to 93.33%-98.33%.The growth rate and growth rate of different types of reef-building corals were different in the promotion of micro-current.The growth rate of A.pruinosa was the highest,and the growth rate of P.decussata was the lowest.When the voltage was 12 V,the micro-current had the best effect on the survival status and growth rate of A.pruinosa,P.lutea,T.peltata,P.decussata and M.turgescens.Micro-current reduces the shedding rate during the cultivation of reef-building coral seedlings by promoting the extension of reef-building coral tissues,and improves the survival rate and growth rate of reef-building coral seedlings.