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Atlantic cod habitat includes both sides of the north Atlantic Ocean and beyond. (Image: NOAA)
Overfishing likely did not cause the Atlantic cod, an iconic species, to evolve genetically and mature earlier, according to a study led by Rutgers University and the University of Oslo – the first of its kind – with major implications for ocean conservation. Evolution has been used in part as an excuse for why cod and other species have not recovered from overfishing, said first author Malin L. Pinsky, an associate professor in the Department of Ecology, Evolution, and Natural Resources in the School of Environmental and Biological Sciences at Rutgers University–New Brunswick. Our findings suggest instead that more attention to reducing fishing and addressing other environmental changes, including climate change, will be important for allowing recovery. We can t use evolution as a scapegoat for avoiding the hard work that would allow cod to recover.
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According to scientists, fishes are the dominant vertebrates in the ocean and they contribute roughly 16% of the sinking carbon in feces and other matter, scientists have little knowledge of the role fishes play in the global carbon cycle associated with climate change.
A study led by Rutgers found out that carbon in feces, respirations, and other excretions from fishes make up about 16% of the total carbon, which is roughly 1.6 billion tons that sink below the ocean s water upper layers annually.
(Photo : Pixabay)
Earth s Biological Pump
According to study, more data on this important part of the Earth s biological pump will assist researchers to understand the impact of climate change and harvesting of seafood on the role of fishes in carbon flux. In the journal Oceanography and Limnology, which recently came into existence, carbon flux is the amount of carbon exchanged in the ocean, containing from the surface to the deep sea, which is the focus of this study.