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Dietary concerns Local communities are not the only ones eating fish, of course, or even most of it. Much of the world is increasingly getting its fish from enormous ships roaming the world’s oceans, harvesting as they go. Another paper in Science this week, which compares the fates of seabirds in the Northern and Southern hemispheres, suggests intensive commercial fishing may be making life on a warming planet much harder for birds. By analysing 122 datasets reporting the average number of fledglings emerging from the carefully monitored nests of 66 seabird species between 1966 and 2018, an international team of scientists discovered striking differences between the hemispheres. The average number of young per nest successfully raised by birds whose diets consist at least partly of fish decreased significantly more in the Northern Hemisphere, which may ultimately result in decreasing population numbers.

United statesMary donovanNancy knowltonNational museum of natural historyArizona state universityReef checkKahekili herbivore fisheries management areaNational museumNatural historyஒன்றுபட்டது மாநிலங்களில்மேரி டொநொவந்நான்சி நோல்டன்தேசிய அருங்காட்சியகம் ஆஃப் இயற்கை வரலாறுஅரிசோனா நிலை பல்கலைக்கழகம்ரீஃப் காசோலைதேசிய அருங்காட்சியகம்