21 MAY, 2019 - M/V SO...FEA DECK LOG - RHODY WEEK-END VISITORS (Part One)
wild seafood populations, these three changes in ocean chemistry have a devastating impact on ocean
food fishes like Tuna, Salmon, Cod, and Herring, and the impacts can be fatal for the many shell-forming
invertebrate organisms, such as shrimp, crabs, corals that rely on dissolved minerals to build their shells
and exoskeletons of shell-forming planktonic organisms, including plants like coccolithophores and marine
snails called pteropods, which are an important food source for fish, especially tuna, salmon and whales.
another 3.0 billion people with “15 percent” of theirs). In 2018, the world’s fish farmers and fishing fleets
harvested 120 million tons of seafood, about five times the catch of 1960.
of the world’s population), eats 1/3rd (40 million tons) of the worlds seafood catch, Myanmar, Vietnam
and Japan combine to eat another 6 million tons.
U.S. consumption is now at around 7.0 kg per person, with beef, pork, chicken as basics, (1 Kg = 2.2 pounds)
acidic as they soak up ever-increasing amounts of carbon dioxide from the atmosphere and pollution,
driven by the tripling of the world’s population numbers (and the industries needed to support the
civilization), and mankind intentionally ignoring pollution.
the start of the Industrial Revolution was at around 270 parts per million (ppm) as compared to today's
410 ppm, this means that it’s dropped from 8.2 to 8.1 in just a hundred years.
journal Science, examined fish population data in 38 regions, studying 235 fish populations made
up of 124 species, which represented about a third of the total global fishing catch observations over
an 80-year period (1930 to 2010).
releasing around 1 million tons of air-borne carbon dioxide per hour into the Earth's atmosphere, about
25% of which reacts with seawater and is absorbed to form a weak carbonic acid (H2CO3) causing
the surface ocean pH to go lower by around 0.002 units every year.
from natural runoffs also raises the acid level, in addition to Co2.
86 degrees F, releasing compounds such as styrene trimer, a polystyrene by-product, and Bisphenol A,
a chemical used in hard plastics like reusable water bottles and as linings of aluminum cans,
Bisphenol A (BPA) has been shown to interfere with the reproductive systems of fish, sea life, shellfish,
and humans, while styrene monomer is a carcinogen. (remember we banned it in baby bottle
manufacture). crustaceans such as shrimp, lobsters, and crab have shells that are a composite of chitin,
proteins, and carbonate minerals that the acid weakens. (shellfish are important sources of seafood,
as about half the total income for marine fisheries in the US comes from mollusks and crustaceans).
Coming up in Part Two... How this ocean pollution all started . . . and, a partial fix not involving fossil fuels.....