%0 Journal Article
%T The Effects of Alexandrium tamarense on Survival,Growth and Reproduction of Neomysis awatschensis<br>塔玛亚历山大藻对黑褐新糠虾存活、生长以及种群繁殖的影响
%A TAN Zhi-Jun
%A <br>谭志军
%J 生态学报
%D 2002
%I 
%X The effects of dinoflagellate Alexandrium tamarense on Mysid Neomysis awatschensis were studied using acute and chronic tests. The results showed that A. tamarense could affect the survival, growth and reproduction of N. awatschensis, and the effects increased with the algal concentration. In acute experiment, the mortality rate in 9 000cells/ml A. tamarense was 55%, over 10% shrimps died in 900cells/ml A. tamarense, and 96hLC50 of N. awatschensis was 7 000cells/ml. There were 25% N. awatschensis which died in the cell-free filtrate after 96 hour exposure. The acute results also showed that the cell-free filtrate of A. tamarense could effect survival rate of N. awatschensis significantly in a short time. Chronic experiment (62days) showed that A. tamarense could affect the total juvenile population of N. awatschensis. The total numbers of juveniles produced were only 106, 32 and 27 in algal concentrations of 90, 450, 900 cells/ml, respectively, while 164 juveniles were released in the control group during the period. The first releasing time, total releasing days, reproductive of break the parent mysids and the highest number of juveniles per day were also influenced significantly by this toxic dinoflagellate. In concentration of 900 cells/ml, the first releasing day was prolonged for 3 days compared with the control; the total releasing days was 9, while it was 28 in control; the adult shrimps had 3 reproductive breaks during the reproduction period. The highest number of juveniles produced per day was 7 at this concentration, while it was 17 in control. It was also found that A. tamarense can affect the survival and growth of the adult mysid: in 900cells/ml A. tamarense, the mortality rate of N. awatschensis was 37%. The length and weight of adult shrimps were 95.6% and 81.9% respectively of those of the control, but the difference was not significant (P>0.05). The harming mechanism of A. tamarense to N. awatschensis needs further exploring.
%K A
%K tamarense
%K N
%K awatschensis
%K survival
%K growth
%K reproduction<br>塔玛亚历山大藻
%K 黑褐新糠虾
%K 存活
%K 生长
%K 赤潮甲藻
%K 毒性
%K 危害
%K 种群繁殖
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=B28A0083A3478086&yid=C3ACC247184A22C1&vid=BC12EA701C895178&iid=F3090AE9B60B7ED1&sid=D9BD5E184C6E559D&eid=71706E59E547123D&journal_id=1000-0933&journal_name=生态学报&referenced_num=13&reference_num=11