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生态学杂志 ›› 2023, Vol. 42 ›› Issue (3): 694-701.doi: 10.13292/j.1000-4890.202303.018

• 研究报告 • 上一篇    下一篇

珠江口康氏侧带小公鱼鱼卵的空间分布特征

田丰歌,何薇,黄彬彬,娄全胜,胡慧娜,邓伟*   

  1. (国家海洋局南海环境监测中心, 海南南沙珊瑚礁生态系统国家野外科学观测研究站, 广州 510300)
  • 出版日期:2023-03-10 发布日期:2023-03-10

Spatial distribution of eggs of Stolephorus commersonnii in the Pearl River Estuary.

TIAN Fengge, HE Wei, HUANG Binbin, LOU Quansheng, HU Huina, DENG Wei*   

  1. (South China Sea Environmental Monitoring Center, State Oceanic Administration, Nansha Islands Coral Reef Ecosystem National Observation and Research Station, Guangzhou 510300, China).

  • Online:2023-03-10 Published:2023-03-10

摘要: 根据2013年8月、2017年8月、2019年8月、2020年8月在珠江口海域的生态调查数据,分析了珠江口康氏侧带小公鱼(Stolephorus commersonnii)鱼卵的空间分布特征及其与水团的关系,并利用高斯模型研究了鱼卵分布对盐度的适应性。结果表明:根据对温、盐度数据的K-means聚类分析,将调查海域分为径流水、咸淡混合水和南海高盐水3种水团;康氏侧带小公鱼鱼卵在咸淡混合水和南海高盐水区域均有一定数量分布,而在径流水中基本无分布;曲线拟合结果显示,2020年8月调查的鱼卵丰度和海水表层盐度(sea surface salinity,SSS)的关系符合高斯模型,康氏侧带小公鱼鱼卵分布的SSS最适值为16.28,最适范围为11.76~20.80,耐受范围为7.24~25.32;康氏侧带小公鱼鱼卵主要分布在珠江口中部的内伶仃岛以南,青洲、桂山岛周边,以及大屿山岛附近水域;在珠江口北部,其分布范围随着径流水势力的消长而发生变化;在东南部30 m以深的陆架区,基本无康氏侧带小公鱼鱼卵分布。


关键词: K-means聚类, 水团, 盐度, 高斯分布

Abstract: The spatial distribution of eggs of Stolephorus commersonnii and its relationship with water mass were studied based on ecological survey data of four cruises in the Pearl River Estuary in August of 2013, 2017, 2019, and 2020. The adaptability of the S. commersonnii eggs to salinity was analyzed using Gaussian model. According to K-means cluster analysis of water temperature and salinity, the survey region could be divided into three water masses: runoff water, brackish mixed water, and high-salinity water. The eggs of S. commersonnii were distributed in the regions of brackish mixed water and high-salinity water, but almost not in runoff water. The relationship between egg abundance and sea surface salinity (SSS) was consistent with the Gaussian model in August 2020. The optimal SSS was 16.28, ranging from 11.76 to 20.80, while the tolerance range was from 7.24 to 25.32. The eggs of S. commersonnii were mainly distributed in the middle of the Pearl River Estuary, including south of Neilingding Island, waters around Qingzhou, Guishan and Lantau islands. In the northern part of the Pearl River Estuary, the distribution of S. commersonnii eggs varied with the fluctuation of runoff input. There were almost no eggs in 30 m deep shelf area towards southeast.


Key words: K-means cluster, water mass, salinity, Gaussian model.