论文部分内容阅读
在自然环境的季节循环中,鱼类生长的季节周期性是阐明鱼类生物学特性变化的主要指标之一。大黄鱼 Pseudosciaena crocea(Rich.)是我国沿岸海区的主要捕捞对象;捕捞具有明显的季节性。因此,进行大黄鱼季节生长的研究,不仅可为合理利用资源、提高种群生产力等问题提供必要的生物学依据,而且对进一步探讨生长过程的规律,也具有重要意义。本文对浙江近海大黄鱼(春季生殖鱼群)的季节生长作一比较详细的分析;同时对季节生长的特点及其与耳石生长的关系进行了初步讨论。其次,对调整大黄鱼捕捞时期问题也提出了初步意见。
Seasonal seasons of fish growth are one of the main indicators to elucidate the biological changes of fish in the seasonal cycle of natural environment. Large yellow croaker Pseudosciaena crocea (Rich.) Is a major fishing destination in China’s coastal areas; fishing has obvious seasonal. Therefore, the research on the seasonal growth of big yellow croaker not only provides the necessary biological basis for the rational utilization of resources and the improvement of population productivity, but also has important significance for further studying the law of growth process. In this paper, the seasonal growth of large yellow croaker (spring reproductive fish) on the coast of Zhejiang Province is analyzed in detail. The characteristics of seasonal growth and its relationship with the growth of otolith are also discussed. Second, preliminary opinions on the timing of adjusting the fishing of large yellow croakers were also put forward.