Cornell-led research in the Amazon reveals smaller fish species are more nutritious, lower in mercury, and less prone to overfishing than larger species. This study underscores their role in conserving biodiversity and promoting public health worldwide, as larger fish populations decline.
Analyzing 59 fish species, researchers found smaller, more abundant fish are less contaminated by mercury due to shorter lifespans and reproductive cycles. These cycles also enhance their nutritional value. Larger species, like tuna and salmon, have higher mercury levels and face greater environmental pressures, such as disrupted migratory routes caused by dams.
The findings highlight the need for public health strategies that prioritize sustainable, nutrient-rich food systems to protect ecosystems and address global food security.
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