Distribution characteristics and seasonal seawater changes of fish eggs and larvae in the northern South China Sea.

The quality of the marine environment is increasingly affected by human activities, especially the ecological environment of nearshore waters is deteriorating year by year, and the production of fishery resources is constantly decreasing. As a result, fish eggs and larvae have gradually been highly valued in recent years. Through cross-sectional investigation and research on the spring and autumn seasons in the northern waters of the South China Sea, this paper preliminarily explores the distribution characteristics and seasonal changes of fish eggs and larvae in the northern South China Sea. As clearly revealed by the survey and research results, the species and resource density of fish eggs and larvae in spring are higher than those in autumn. Moreover, the high-density areas of fish eggs and larvae are predominantly concentrated in the nearshore waters, with a comparatively small number in the nearshore areas. In spring, there are principally open-sea species, while in autumn, there are nearshore species. After October in the northern part of the South China Sea, the water temperature began to decrease, and fish entered a low peak period of spawning. This study has reference value for the sustainable development of fisheries in the sea area as well as the protection and rational utilization of marine living resources. [ABSTRACT FROM AUTHOR]