| 1. | 3 . food , temperature and predation pressure directly act on the value of venturous revenue and are major environmental factors affecting dvm of the copepod
食物、温度和捕食压力直接影响风险收益值的大小，是影响桡足类垂直迁移的主要环境因子。 |
| 2. | 1 the leaching characteristics and vertical transport of 95zr in two representational soils ( panfan red soil and red - yellow earth ) in zhejiang province were studied with soil - pole simulation installation
1 、采用模拟土柱法研究了~ ( 95 ) zr在两种红壤(泮畈红壤和红黄壤)中的淋溶特性和垂直迁移。 |
| 3. | 2 the leaching and vertical transport of 95zr in three representational soils ( paddy soil , red - yellow earth and sea mud ) in zhejiang province and the influence of salinity on the activities of 5zr in sea mud were studied with soil - pole installation
2 、采用土柱法研究了~ ( 95 ) zr在浙江省有代表性的3种土壤(小粉土、红黄壤和海泥)中的淋溶和垂直迁移及盐度对其行为的影响。 |
| 4. | The dvm behavior of the copepod is controlled by multi - factors . the diversified migrating patterns show that copepod is the active decision - maker , which can achieve the optimal food intake during its avoiding predation by performing the normal dvm ; 2
足类的昼夜垂直迁移行为是由多因子控制的，其迁移模式的多样性表明，桡足类是主动的决策者，通过识别环境因子的变化，桡足类借助于常规的昼夜垂直迁移在逃避捕食压力的同时能够实现最优的食物摄取量； 2 |
| 5. | A model is developed to analyze the tradeoff between benefits and costs involved in the strategies for the normal dvm of copepod . the venturous revenue is used as the criterion for this optimal tradeoff . it is a function of the environmental factors and the age of copepod
本文提出一个桡足类常规的昼夜垂直迁移模型，以分析桡足类在垂直迁移的决策过程中对利益和风险的权衡机制，风险收益被用来作为这种权衡机制的优化目标，它是环境因子和桡足类年龄的函数。 |
| 6. | In the summer stratified water column , the deeper the maximum depth of food distribution is , the stronger the dvm is performed ; the increase of the gradient of temperature in the thermocline layer can decrease the magnitude of the dvm and form the thermal barricade to the copepod ; the effects of the predation pressure on dvm is complex . on the one hand , the variations in the distribution depth of the predation pressure vs . the thermocline layer or the depth of the maximum food can modify the dvm patterns of the copepod . on the other hand , different predation pressure induces different dvm patterns
在夏季分层水体中，食物的最大分布深度越大，动物向下迁移的幅度也越大；温跃层的温度梯度增大可以减小动物迁移的幅度，成为桡足类垂直迁移的温度屏障；捕食压力对垂直迁移的影响较复杂，一方面，捕食压力的分布深度与温跃层或食物峰值的相对位置的变化能够改变桡足类垂直迁移的模式，另一方面，捕食压力强度不同，桡足类垂直迁移的幅度也不同，捕食压力越大，迁移的幅度越大，当捕食压力增加到一定程度，桡足类停止向上的迁移，大部分时间呆在水体深层，可能进入捕食压力引起的“滞育”状态。 |
| 7. | During vertical migration , the copepod is assumed to instantaneously check the variations of the environmental parameters and can thereby make the optimal behavioral strategy to maximize the value of venturous revenue , i . e . , taking up as much food as possible at as less cost of mortality as possible
在垂直迁移的过程中，我们假设桡足类个体能够即时识别环境参数的变化从而采取最优的行为策略以获取风险收益的最大值，即以尽可能小的死亡代价获取尽可能多的食物。 |
| 8. | Age as one of the internal factors can affect the value of venturous revenue through acting on the checking results of the external factors ( e . g . , predation pressure ) , and thereby affect the optimal migrating strategies . therefore , the patterns for dvm vary with the change of the animal ' s age
作为内部状态因子的年龄，因对外部因子(如捕食压力)识别结果的影响而对风险收益值有较大的影响，从而影响桡足类垂直迁移的最佳策略，导致其迁移的形式随年龄的变化而变化，一般来说，年龄越大的动物垂直迁移的时间越早、幅度越大； 3 |
