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李春波, 黄晓荣, 冯广朋, 庄平, 耿智, 伍烨菱. 不同发育阶段中华绒螯蟹对底质的喜好性研究[J]. 水生生物学报, 2022, 46(6): 888-895. DOI: 10.7541/2022.2021.0293
引用本文: 李春波, 黄晓荣, 冯广朋, 庄平, 耿智, 伍烨菱. 不同发育阶段中华绒螯蟹对底质的喜好性研究[J]. 水生生物学报, 2022, 46(6): 888-895. DOI: 10.7541/2022.2021.0293
LI Chun-Bo, HUANG Xiao-Rong, FENG Guang-Peng, ZHUANG Ping, GENG Zhi, WU Ye-Ling. PREFERENCE FOR SUBSTRATE IN DIFFERENT DEVELOPMENTAL STAGES OF ERIOCHEIR SINENSIS[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(6): 888-895. DOI: 10.7541/2022.2021.0293
Citation: LI Chun-Bo, HUANG Xiao-Rong, FENG Guang-Peng, ZHUANG Ping, GENG Zhi, WU Ye-Ling. PREFERENCE FOR SUBSTRATE IN DIFFERENT DEVELOPMENTAL STAGES OF ERIOCHEIR SINENSIS[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(6): 888-895. DOI: 10.7541/2022.2021.0293

不同发育阶段中华绒螯蟹对底质的喜好性研究

PREFERENCE FOR SUBSTRATE IN DIFFERENT DEVELOPMENTAL STAGES OF ERIOCHEIR SINENSIS

  • 摘要: 为探究不同发育阶段中华绒螯蟹对底质类型的喜好性, 采用单因子实验方法, 研究不同发育阶段中华绒螯蟹个体和群体对泥、泥沙(泥﹕沙=1﹕1)、中沙(0.35—0.50 mm)和细沙(0.25—0.35 mm)等4种底质的喜好性。亲蟹个体出现在各底质上的时间百分比和群体出现在各底质上的数量百分比结果均表明亲蟹对泥底质的喜好性显著高于其他三种底质(P<0.05); 扣蟹个体和群体实验结果均表明扣蟹对泥和中沙底质的喜好性显著高于其他两种底质(P<0.05); 仔蟹群体实验结果表明仔蟹最喜好泥底质, 其次是泥沙, 两者显著多于中沙和细沙(P<0.05)。昼夜研究结果表明, 亲蟹个体和群体、扣蟹群体及仔蟹群体在白天和夜晚对底质的选择均具有显著性差异(P<0.05), 但扣蟹个体在夜晚对底质的选择无显著性差异(P>0.05)。对栖息方式的研究表明, 亲蟹无显著的埋栖行为, 扣蟹喜好埋栖在泥和中沙里面, 仔蟹喜好埋栖在泥里面, 其次是泥沙。研究揭示, 中华绒螯蟹对不同底质的喜好性具有显著差异, 且不同发育阶段中华绒螯蟹对底质的喜好及栖息方式也不尽相同, 为其生境修复和资源养护提供了参考。

     

    Abstract: In recent years, due to the construction of large-scale water conservancy projects, human overfishing, lake reclamation, and water pollution had a serious impact on the reproductive migration and habitat of the Chinese mitten crab at the Yangtze River estuary. As a component of the living environment of aquatic organisms, substrate is of great significance for finding habitats for aquatic organisms and protecting aquatic organism resources. In order to explore the preferences of Eriocheir sinensis at different developmental stages for the types of substrates, a single factor experiment method was used to study the effects of E. sinensis on mud, silt (mud: sand=1﹕1), medium sand (0.35—0.50 mm) and fine sand (0.25—0.35 mm) at different developmental stages. The results of the study on parent crabs showed that in individual experiment, the percentages of time that parent crab stayed on the mud, silt, medium sand and fine sand were (58.18±6.34)%, (15.95±5.23)%, (12.05±2.38)% and (13.81±2.14)%; in the group experiment, the percentages of parent crabs appearing on the mud, silt, medium sand and fine sand were (33.69±2.17)%, (23.83±1.21)%, (20.15±0.34)% and (22.33±3.23)%, the individual and group experiment results of parent crabs showed that the parent crab preference for mud substrate was significantly higher than the other three substrates, and the differences between them were significant (P<0.05). The results of the study on button sized crabs showed that in individual experiments, the percentages of time that button sized crabs stay on the mud, silt, medium sand and fine sand were (35.69±1.73)%, (18.08±3.25)%, (30.83±4.99)% and (15.40±1.91)%; in the group experiment, the percentages of times that crabs appeared on the mud, silt, medium sand and fine sand were (32.51±2.50)%, (19.80±3.84)%, (30.76±2.01)% and (16.93±0.95)%, the individual and group experiment results of the crabs showed that the button sized crabs have a preference for mud and medium sand substrate were significantly higher than the other two, and they were different from each other significant (P<0.05). The percentages of times that juvenile crabs appear on the mud, silt, medium sand and fine sand were (60.42±2.89)%, (22.50±2.32)%, (8.75±2.50)%, and (8.33±1.10)%. Juvenile crabs like mud substrate the most, followed by silt, the differences were significant (P<0.05). Studies on habitat methods showed that parent crabs have no obvious burial behavior, button sized crabs prefer to bury in mud and medium sand, while juvenile crabs prefer to bury in mud, followed by silt. E. sinensis have differences in the choice of substrate, and the requirements and habitat of E. sinensis at different developmental stages are also different. The results of this study provide a reference for habitat restoration and resource conservation of E. sinensis.

     

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