摘要
在单位水体中，鱼类个体数量增加对鱼体本身是一种胁迫，并引起机体产生一系列生理和行为的适应变化。作者根据有关资料，认为鱼类对胁迫的适应反应从神经内分泌活动变化开始，使血液中皮质醇浓度升高，加强了糖异生作用，显示出低血糖和抗病能力降低。高密度对鱼类行为的影响主要表现为相互间争斗行为频率下降。生理功能的调节需消耗大量能量，因而影响了鱼的生长。
In crease of fish numbers in a certain unit of water body is a kind of stress to the fish itself, which causes a series of physiological and behavioural reaction of the fish to adpapt to the change. Based on relevant data, the authors think that the reaction starts from nervous endocrine activity, which leads to the variations of blood components, showing the declining of diseaseresistance ability. Impact of high density on fish behaviour is shown by the decrease of fighting behariour oceurence among fish. Adjustment of physiological function needs to consume a great deal of energy, resulting in the inhibition of fish growth.
出处
《水产科技情报》
1998年第3期110-113,共4页
Fisheries Science & Technology Information
关键词
密度
胁迫
鱼类
环境适应
Density Stress Adaptation Fishes
