| 椭圆萝卜螺对3种沉水植物的牧食特性 |
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| 引用本文： | 卓帅,何文辉,彭自然,周丽丽,周灵,陆天熠,刘玉超.椭圆萝卜螺对3种沉水植物的牧食特性[J].上海海洋大学学报,2020,29(3):339-345. |
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| 作者姓名： | 卓帅 何文辉 彭自然 周丽丽 周灵 陆天熠 刘玉超 |
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| 作者单位： | 上海海洋大学 海洋生态与环境学院,上海 201306;上海太和水环境科技发展有限公司,上海 200433 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 研究椭圆萝卜螺(Radix swinhoei)对不同沉水植物的牧食特性。通过大(0.78 g/个)、中(0.28 g/个)、小(0.06 g/个)等3种规格及低(40个/L)、中(80个/L)、高(120个/L)等3个密度的椭圆萝卜螺牧食实验,研究其对伊乐藻(Elodea nuttallii)、水盾草(Cabomba caroliniana)、苦草(Vallisneria natans)等3种沉水植物的牧食率和牧食选择性。研究结果表明:椭圆萝卜螺的总牧食率与螺规格成反比,小规格的螺对沉水植物的总牧食率最高,达(219.66±47.17) mg/(g·d),中规格的螺其次,为(47.53±9.08)mg/(g·d),大规格的螺牧食率最低,仅为(20.37±14.60)mg/(g·d);低、中、高密度的椭圆萝卜螺对3种沉水植物的总牧食率无显著差异。就牧食选择性而言,椭圆萝卜螺对3种沉水植物的喜好不随螺规格的变化而变化,不同规格的椭圆萝卜螺都会优先牧食伊乐藻和苦草,不喜好水盾草;同等规格不同密度的椭圆萝卜螺均会优先牧食苦草。研究结果对生态修复工程中合理配置水生动物,完善水生态系统及提高生态系统的稳定性具有重要意义。
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| 关 键 词： | 椭圆萝卜螺 沉水植物 牧食率 牧食选择 合理配置 |
| 收稿时间： | 2019/1/3 0:00:00 |
| 修稿时间： | 2019/6/15 0:00:00 |
Grazing characteristics of three kinds of submerged plants for Radix swinhoei |
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| ZHUO Shuai,HE Wenhui,PENG Ziran,ZHOU Lili,ZHOU Ling,LU Tianyi,LIU Yuchao.Grazing characteristics of three kinds of submerged plants for Radix swinhoei[J].Journal of Shanghai Ocean University,2020,29(3):339-345. |
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| Authors: | ZHUO Shuai HE Wenhui PENG Ziran ZHOU Lili ZHOU Ling LU Tianyi LIU Yuchao |
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| Institution: | Shanghai Ocean University,Shanghai Ocean University,Shanghai Ocean University,Shanghai Ocean University,Shanghai Ocean University,Shanghai Ocean University,Shanghai Ocean University |
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| Abstract: | The grazing characteristics of Radix swinhoei on different kinds of submerged plants were studied. According to the grazing experiments of three sizes of large (0. 78 g/ind), medium (0. 28 g/ind), small (0. 06 g/ind) and different densities of low(40 ind/L), medium(80 ind/L), high(120 ind/L) of Radix swinhoei, grazing rate and selectivity of three submerged plants of Elodea nuttallii, Cabomba caroliniana, and Vallisneria natans by R. swinhoei were studied. The results showed that:The total grazing rate of R. swinhoei was inversely proportional to the snail size; The small-sized snail has the highest total grazing rate for submersed plants, reaching (219.66±47.17) mg/(g·d), and the medium-sized snail is (47.53±9.08) mg/(g·d); The grazing rate of large size is the lowest with only (20. 37±14. 60) mg/(g·d). Different densities had no significant difference for the whole grazing rate on submerged plants. The preference of R. swinhoei for the three submerged plants does not change with the size. R. swinhoei with different sizes will preferentially graze E. nuttallii and V. natans, and do not like C. caroliniana. R. swinhoei with the same size and different density will preferentially graze V. natans. The research results are of great significance for rational allocation of aquatic animals, improvement of aquatic ecosystems and enhancement of ecosystem stability in restoration projects. |
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| Keywords: | Radix swinhoei(H Adam) submerged plant grazing rate grazing option rational allocation |
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