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<p>The present study examined the abundance of jellyfish along the Ratnagiri, west coast&#xa0;of India, throughout the post-monsoon and pre-monsoon season, as well as their correlation with environmental parameters. A total of five cnidarian species were recorded: four from the genus <i>Chrysaora</i> and one from the genus <i>Aequorea</i>. The dominant species were C<i>hrysaora quinquecirrha</i> (&gt; 150 ind/100 m<sup>2</sup>) and <i>C. chinensis</i> (&gt; 130 ind/100 m<sup>2</sup>), followed by <i>C. caliparea</i> (&gt; 120 ind/100 m<sup>2</sup>), <i>C. hysoscella</i> (&gt; 100 ind/100 m<sup>2</sup>), and the hydrozoan <i>Aequorea pensilis</i> (&gt; 130 ind/100 m<sup>2</sup>). The abundance of <i>Chrysaora</i> spp. was seasonal, peaking in March and declining in the late post-monsoon period. Principal Component Analysis (PCA) and Spearman correlation were performed to correlate cnidarian abundance and environmental parameters. <i>Chrysaora</i> spp. showed a significant positive correlation with key environmental parameters, such as water temperature, phosphate, silicate and Chl-a, while showing a strong negative correlation with dissolved oxygen, salinity and a number of diatom species (<i>Pleurosigma</i> sp., <i>Asterionella japonica</i>, <i>Nitzschia</i> sp.). This study provides vital baseline data for India's west coast, significantly improving understanding of how coastal ecosystems respond to the combined pressures of nutrient pollution and climate change.</p>

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Cnidarians Abundance and their Relationship with Environmental Parameters along Ratnagiri, West Coast of India

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Prathamesh J. Ade,
  • Aniruddha D. Adsul,
  • Anil S. Pawase,
  • Milind S. Sawant,
  • Ravindra A. Pawar,
  • Pratiksha V. Nimbarte

摘要

The present study examined the abundance of jellyfish along the Ratnagiri, west coast of India, throughout the post-monsoon and pre-monsoon season, as well as their correlation with environmental parameters. A total of five cnidarian species were recorded: four from the genus Chrysaora and one from the genus Aequorea. The dominant species were Chrysaora quinquecirrha (> 150 ind/100 m2) and C. chinensis (> 130 ind/100 m2), followed by C. caliparea (> 120 ind/100 m2), C. hysoscella (> 100 ind/100 m2), and the hydrozoan Aequorea pensilis (> 130 ind/100 m2). The abundance of Chrysaora spp. was seasonal, peaking in March and declining in the late post-monsoon period. Principal Component Analysis (PCA) and Spearman correlation were performed to correlate cnidarian abundance and environmental parameters. Chrysaora spp. showed a significant positive correlation with key environmental parameters, such as water temperature, phosphate, silicate and Chl-a, while showing a strong negative correlation with dissolved oxygen, salinity and a number of diatom species (Pleurosigma sp., Asterionella japonica, Nitzschia sp.). This study provides vital baseline data for India's west coast, significantly improving understanding of how coastal ecosystems respond to the combined pressures of nutrient pollution and climate change.