文章摘要
罗晓霞,黄翔鹄,李长玲.不同浓度的牟氏角毛藻对双齿许水蚤生长、存活和生殖的影响[J].水产学报,2017,41(8):1276~1285
不同浓度的牟氏角毛藻对双齿许水蚤生长、存活和生殖的影响
Effects of food concentration on the development, survival, reproduction of calanoid copepod (Pseudodiaptomus dubia)
投稿时间:2016-01-24  修订日期:2016-12-15
DOI:10.11964/jfc.20160110260
中文关键词: 双齿许水蚤  食物浓度  生长率  存活  生殖  内禀增长率
英文关键词: Pseudodiaptomus dubia  food concentration  growth rate  survival  reproduction  intrinsic growth rate
基金项目:广东省海洋渔业科技与产业发展专项(A201508B08)
作者单位E-mail
罗晓霞 广东海洋大学水产学院, 广东 湛江 524088  
黄翔鹄 广东海洋大学水产学院, 广东 湛江 524088 xialemon@126.com 
李长玲 广东海洋大学水产学院, 广东 湛江 524088  
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中文摘要:
      为研究不同浓度的牟氏角毛藻对双齿许水蚤生长、存活和生殖的影响,并构建双齿许水蚤在不同食物浓度下的种群生命表。实验共设5个浓度组(0.5×105、3×105、6×105、12×105、17×105个/mL),结果显示,食物浓度对双齿许水蚤的幼体生长率、发育时间、存活率及孵化率有显著的影响。当食物浓度为3×105~6×105个/mL时,双齿许水蚤的发育速率、生长率及孵化率显著高于浓度最低组(0.5×105个/mL)和浓度最高组(17×105个/mL),其幼体的发育时间为174~192 h,生长率为0.6~0.64 μg C/d,孵化率为464.2~608.2个/雌。存活率则随着食物浓度的升高而降低,浓度较低的0.5×105、3×105、6×105个/mL组的存活率均达80%,显著高于12×105及17×105个/mL组。食物浓度越高,生命周期越短。当食物浓度为3×105及6×105个/mL时,桡足类的内禀增长率均达0.237/d,比最低浓度组(0.5×105个/mL)及最高浓度组(17×105个/mL)高出28%~32%。研究表明,食物浓度过高或过低均不利于双齿许水蚤的种群增长,其生长繁殖的最适食物浓度范围为3×105~6×105个/mL。
英文摘要:
      An experiment was carried out to evaluate effects of food concentration on the development, survival, reproduction of a calanoid copepod (Pseudodiaptomus dubia), in which the population life table was formed at different food concentration. The animals were fed with Chaetoceros muelleri as food designated with five food concentrations, 0.5×105, 3×105, 6×105, 12×105 and 17×105 cells/mL, respectively. The results showed that different concentrations of C. muelleri had significant effects on the development, survival and reproduction of P. dubia. When the food concentration was 3×105 – 6×105 cells/mL, the development time, growth rate and hatching rate of P. dubia was 174–192 h, 0.6–0.64 μg C/d, and 464.2–608.2 neonates per female, respectively, which were significantly higher than those of the lowest concentration (0.5×105 cells/mL) and the highest concentration (17×105 cells/mL). The survival and lifespan decreased with the increase of food concentration. The survival of P. dubia reached up to 80% when the food concentration ranged from 0.5×105 cells/mL to 6×105 cells/mL, which were significantly higher than that of the 12×105 and 17×105 cells/mL. When the food concentration was 3×105 – 6×105 cells/mL, the intrinsic growth rate of P. dubia was 0.237/d and 28%–32% higher than that of 0.5×105 and 17×105 cells/mL. Therefore, putting too much or too little food would be disadvantageous to the population growth of P. dubia. Therefore, the most favourable food concentration for P. dubia would range from 3×105 to 6×105 cells/mL.
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