微藻饵料添加光合细菌对安氏伪镖水蚤发育和繁殖的影响

Effects of adding photosynthetic bacteria to microalgae diets on the development and reproduction of Pseudodiaptomus annandalei

为探究光合细菌对桡足类生长和生殖的影响,研究不同微藻饵料对安氏伪镖水蚤(Pseudodiaptomus annandalei)发育和繁殖的影响,结果显示,不同种类的饵料微藻对安氏伪镖水蚤的发育和繁殖影响效果显著(P<0.05),投喂湛江等鞭金藻(Isochrysis zhanjiangensis)时,水蚤的发育最快,存活率最高,总产幼体数最高。在湛江等鞭金藻饵料中添加不同浓度光合细菌,结果显示,在投喂等量微藻的条件下,当添加的光合细菌浓度达到1 mgC/L时,其无节幼体和桡足幼体的发育时间分别缩短20%和14.5%,个体存活率提高21.7%,总产幼体提高20.4%。而当添加菌浓度为2 mgC/L时会显著抑制其发育和繁殖。结果表明,在微藻饵料中添加适量光合细菌有利于安氏伪镖水蚤的发育和繁殖。

In order to explore the effects of photosynthetic bacteria on the growth and reproduction of copepods,this paper studied the effects of different microalgae diets on the development and reproduction of Pseudodiaptomus annandalei.The results showed that different types of bait microalgae had significant effects on the development and reproduction of Pseudodiaptomus annandalei(P<0.05).When fed with Isochrysis zhanjiangensis,Pseudodiaptomus annandalei developed fast with the highest survival rate and the highest total number of larvae.Subsequently,different concentrations of photosynthetic bacteria were added to the Isochrysis zhanjiangensis.The results showed that when the concentration of photosynthetic bacteria reached 1 mgC/L with the same amount of microalgae,the development time of nauplii and copepods of Pseudodiaptomus annandalei was shortened by 20%and 14.5%,respectively,the survival rate of individuals was increased by 21.7%and the total number of larvae increased by 20.4%.However,when the concentration of added bacteria was 2 mgC/L,the growth and the reproduction of Pseudodiaptomus annandalei were significantly inhibited.The results showed that adding an appropriate amount of photosynthetic bacteria to the microalgae feed was beneficial to the development and reproduction of Pseudodiaptomus annandalei.