在保护生物学中，鱼类的不同生活史阶段对鱼类种群的增长率贡献率是存在差异的，弹性分析量化不同生命率（生长、存活、繁殖力）对种群增长率的贡献率，从而要重点保护和管理贡献率大的生活史阶段。北部湾鱼类目前衰退十分严重，如何恢复和保护北部湾鱼类显得尤为重要。本项目拟以北部湾主要鱼类为研究对象，综合运用种群动力学模型生命表和弹性分析等研究方法和技术手段，揭示北部湾鱼类的存活类型、生活史类型、种群动态及影响北部湾鱼类种群增长的关键生活史阶段，从而为北部湾鱼类的保护和管理提供科学合理的依据。

In conservation biology, the contribution rate of different life stages to the annual population multiplication rate of fish is different. Elasticity analysis quantifies the contribution rate of different vital rates (growth, survival and fecundity) to annual population multiplication rate, and it is generally accepted that the protection and management efforts should focus on the life stages with great contribution rate to the population. The Beibu Gulf fish is currently very serious recession, how to restore and protect the Beibu Gulf fish is particularly important. By using the population dynamics model, life tables and elasticity analysis, the present study will originally indicate the survival type, life history patterns, population dynamics, and the key life stages influence on the annual population multiplication rate of main fish in Beibu Gulf, so as to provide scientific and reasonable basis for the protection and management of Beibu Gulf fish.