Fish biomass
Fish biomass on World Data Ocean: a running collection of 2 stories we have gathered and hand-picked because they are worth your time. Every post here touches on fish biomass in some way — the news, the analysis, the deep dives, and the occasional surprise find. A Global Hub for Ocean Intelligence 4 World Data Ocean is a centralized digital platform where researchers, scientists, and ocean enthusiasts converge to explore, analyze, and… New stories are added to this page as we find them, so check back if you want to keep up with what is happening around fish biomass, or subscribe to the RSS feed to get them as soon as they are published. Browse the collection below, or head back to the homepage to see everything World Data Ocean is covering right now.
Protection and pitfall: barrier nets reorganize fish communities in an ex situ reserve and compromise Yangtze finless porpoise prey after the fishing ban
The 2020 Yangtze River fishing ban, a significant conservation effort, presents complex, nuanced outcomes within ex situ reserves. Recent longitudinal surveys of He-wang-miao Oxbow, a critical habitat for the endangered Yangtze finless porpoise, reveal a reorganized fish community, including a dramatic decline in prey biomass despite overall increases in species diversity and stability. Barrier nets appear to be a key driver of this trophic shift, intensifying predation and resource competition.
Indices of reduced fish biomass, changes in fish biodiversity and seafloor macrolitter – implications for fisheries management in Sri Lanka
A longitudinal study utilizing fisheries acoustics and bottom trawl surveys from 1978-2018 reveals significant shifts in Sri Lankan waters. Data collected by the “Dr. Fridtjof Nansen” vessel indicate a drastic reduction in total fish biomass, declining from approximately 280,000-395,000 tons to 173,000 tons over four decades. Concurrent changes in fish biodiversity, including reduced average lengths for commercially important species, alongside increased macro-litter accumulation, underscore the urgent need for validated fisheries management plans and environmental action.