Mortality
Mortality 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 mortality 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 mortality, 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.
Higher dietary EPA & DHA levels improve commercial salmon farming productivity, predictability and sustainability
A large-scale, longitudinal study analyzing over 430 million Atlantic salmon across 556 generations has validated a critical link between dietary EPA and DHA levels and aquaculture performance. Results demonstrate that populations receiving higher levels (>9% TFA) exhibited significantly improved outcomes, including an 8% reduction in mortality, a 13% improvement in feed conversion ratio, and a 2% increase in harvest quality. Furthermore, increased EPA+DHA enhanced production predictability, reducing variability in key metrics.
Correction: Gray whales (Eschrichtius robustus) in San Francisco Bay experience high mortality and have limited affiliation to known foraging groups
Recent data reveal concerning mortality rates among gray whales ( *Eschrichtius robustus* ) within San Francisco Bay, coupled with a notable lack of association with established foraging groups. This observation presents a significant challenge to understanding population dynamics and conservation strategies. Our analysis, based on longitudinal tracking, underscores the need for further investigation into the factors contributing to this trend. For deeper exploration of coastal ecosystem interactions, see our related article, "Tourism and coastal fisheries interaction."