COVID-19 lockdown improved the health of coastal environment and enhanced the population of reef-fish.

Mar Pollut Bull · 2021 · PMC7862902 · PMID 33652256

Europe PMC DOI

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a positive trendno p-value reported

Underwater visual census carried out in this study in the coral reef areas before and after the lockdown clearly showed a positive trend in terms of fish diversity and density post lockdown.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.