Preliminary Study on the Adaptability and Feeding Rate of Anodonta woodiana in Low Salinity Environment
- 1 January 2020
- journal article
- Published by Hans Publishers in Open Journal of Fisheries Research
- Vol. 07 (02), 93-99
- https://doi.org/10.12677/ojfr.2020.72013
Abstract
为探索背角无齿蚌(Anodonta woodiana)在不同环境条件下生理响应,对背角无齿蚌在不同温度(25℃、30℃)、盐度条件(0、2.5、5、10)下的生理活动和摄食率进行了观察与比较。实验结果发现,在25℃条件下,盐度为0、2.5、5时,背角无齿蚌成贝存活率为100%;盐度10时,24 h存活率77%,48 h存活率62%;在30℃条件下,盐度0时,24h存活率为42%,盐度2.5时,24 h存活率为29%,盐度5时,24 h存活率为0,盐度10时,24 h存活率为0,各试验盐度下48 h存活率为0。实验结果表明,在25℃条件下,各盐度组的个体存活率都显著高于30℃实验组(P In order to explore the physiological response of Anodonta woodiana under different environmental conditions, the physiological activities and ingestion rates of Anodonta woodiana under 2 tempera-ture levels (25˚C, 30˚C) and 4 salinity grids(0, 2, 2.5, 5,10) were observed and compared. The results showed that the survival rate of Anodonta woodiana was 100% at 25˚C in the salinity of 0 and 2.5 and 5; when the salinity is 10, the 24 h survival rate was 77% and the 48 h survival rate was 62%. When the temperature was set at 30˚C, the survival rate was 42%(in fresh water), 29%(salinity of 2.5) and 0(salinity of 5 and 10) respectively after 24 h, and the survival rate was all 0 after 48 h at 4 levels of salinity. Under each test salinity, the survival rate of individuals in the 25˚C experimental group was significantly higher than that in the 30˚C experimental group (P < 0.05). At 25˚C and 30˚C, ingestion rates increased with increasing salinity, reaching peak levels when the salinity increased to a certain point, then dropped following increasing salinity. At a salinity of 2.5, the ingestion rates reached its peak. And at the same salinity, the ingestion rates were higher at 25˚C than at 30˚C. Therefore, the salinity range of Anodonta woodiana is 0~5. The physiological state of Anodonta woodiana at 25˚C, including ingestion, is better than that at 30˚C, and the maximum ingestion rates occur at a salinity of 2.5.This publication has 12 references indexed in Scilit:
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