Declining fish stocks might give “crucial consequences for our species”
The world’s fish stocks are decreasing. It is estimateds that 90 % of all big fish are already gone. Dr. Michael Crawford, of Imperial College London, sys that “without plentiful DHA, we face a future of increased mental illness and intellectual deterioration. We need to face up to that urgently”. Docosahexaenoic acid (DHA) is an omega-3 fatty acid found in seafood. You can find the article in Mail Online here: Early human ancestors were ‘aquatic apes’: Living in water helped us evolve big brains and walk upright, scientists say.
Michael Crawford – one of the speakers at the Human Evolution onference in London 8-10th of May – states that Docosahexaenoic acid have been crucial for the development of our brains (as well as for other mammals making a living from the sea). According to Crawford we should eat 40 gram fish per day, 200 days a year.
However, by improving our mental health we will also completely undermine the marine stocks – and what will happen when we are another two billion people on the earth? Add overfishing to pollution, climate change and habitat destruction, and a picture of a system in crisis emerges.
Erik, thanks a lot, but this is not exactly what I said.
Humans didn’t descend from “aquatic apes”, of course, although our Pleistocene ancestors were too slow & heavy for regular running over open plains as some anthropologists still believe.
Instead, Homo populations during the Ice Ages (with sea-levels often 100 m lower than today) simply followed the coasts & rivers in Africa & Eurasia, eg, 800,000 years ago, they even reached Flores more than 18 km overseas.
– google “econiche Homo”
– eBook “Was Man more aquatic in the past?” introd.Phillip Tobias http://www.benthamscience.com/ebooks/9781608052448/index.htm
– guest post at Greg Laden’s blog http://scienceblogs.com/gregladen/2013/01/30/common-misconceptions-and-unproven-assumptions-about-the-aquatic-ape-theory
– http://greencomet.org/2013/05/26/aquatic-ape-the-theory-evolves/
– Human Evolution confer.London 8–10.5.13 with David Attenborough, Don Johanson etc. http://www.royalmarsden.nhs.uk/education/education-conference-centre/study-days-conferences/pages/2013-evolution.aspx
June 12, 2013 at 1:41 am