Write a newsletter about the danger danger faced by the fishes in our river or seas
Answers
Answer:
Sardines were once extraordinarily abundant in the south-west of England, leading one 19th-century guidebook to say: “Pursued by predaceous hordes of dogfish, hake and cod, and greedy flocks of seabirds, they advance towards the land in such amazing numbers as actually to impede the passage of vessels and to discolour the sea as far as the eye can reach … Of a sudden they will vanish from view and then again approach the coast in such compact order and overwhelming force that numbers will be pushed ashore by the moving hosts in the rear. In 1836 a shoal extended in a compact body from Fowey to the Land’s End, a distance of at least 100 miles if we take into consideration the windings of the shore.” (Handbook for Travellers in Devon and Cornwall, John Murray and Thomas Clifton Paris, 1851).
Today people travel thousands of miles to dive and film such scenes, not realising they were once commonplace on our own coasts. Last week the World Wide Fund for Nature and the Zoological Society of London issued their most comprehensive look at the state of life in the sea. The report makes uncomfortable reading. Taking in more than 1,000 species worldwide and 5,000 populations of fish, turtles, marine mammals and a host of others, it draws the bleak conclusion that there is only half the amount of wildlife in the sea today as in 1970.
Although 1970 is their baseline year and seems long ago, life in the sea has been in decline for much longer. In short, that means the picture is worse than the report suggests. And the waters around Britain demonstrate the same patterns that are slashing fish stocks around the world.
The first well-documented herring fishery collapse around the UK was off East Anglia in the mid-1950s, followed by that in Scotland’s Firth of Clyde in the 1960s. An abundance of small fish attracted the attention of larger creatures, as the above passage shows. Fishermen found the great herring shoals by following the “signs” of those better able to search for them: seabirds raining attacks from the sky, blowing whales, leaping dolphins, the thrashing of thresher shark tails; there was always a frenzy somewhere along the coast. The seas of the early 19th century and before had an exuberance of life it is hard for us to comprehend today, so long has it been since anybody saw it.
Explanation:
hi mate,
according to news the National Academy of Sciences estimated that ocean-based sources, such as cargo ships and cruise liners had dumped 14 billion pounds of garbage into the ocean. Over 1 million seabirds and 100,000 sea mammals are killed by pollution every year.
Water pollution harms fish populations in various ways. ... Algal blooms can be harmful to fish as they feed upon algae, toxins accumulate within the fish, and when a predator fish consumes that fish, they too are consuming higher toxin levels. Pesticides and heavy metals that enter waterways can also harm or kill fish.
I hope it helps you.