The Dace (Leuciscus leuciscus) is a fresh water fish of the carp family (Cyprinidae). They are found in fast-flowing streams and lakes, often forming shoals. The dace resembles the roach but is longer and thinner. It is a gregarious fish inhabiting chiefly deep clear streams with a gentle current. It seldom exceeds a pound in weight. Research Dace
The Dolphin (formerly also known as a sea-goose) is a genus of cetaceans. The flesh is coarse, rank, and disagreeable, but is used by the Laplanders as food. Dolphins live on fish, mollusca, etc, and often may be seen in numbers round shoals of herring. The animal has to come to the surface at short intervals to breathe. The blow-hole is of a semilunar form, with a kind of valvular apparatus, and opens on the vertex, nearly over the eyes. The structure of the ear renders the sense of hearing very acute, and the animal is observed to be attracted by regular or harmonious sounds. One or two young are produced by the female, who suckles and watches them with great care and anxiety, long after they have acquired considerable size. Compactness and strength are the characteristics of the genus. Dolphins are renowned for being highly intelligent and friendly towards swimmers and ships. Research Dolphin
Herring is the general name of fishes of the genus Clupea, the most important of which is the Clupea harengus, or common herring. It is of wide distribution in the
North Atlantic, 45 degrees North latitude being about the southern limit. It measures from 10 to 12 inches in length, with blue-green back and brilliant silvery white under parts. It has small teeth in both jaws, and is of an elegant shape, the body being much compressed.
It was once supposed that the herrings migrated in two great shoals every summer from the Polar Seas to the coasts of Britain and France, returning in the winter, but the migration is probably only from a deeper part of the ocean to a shallower. The feeding ground of the herring is probably the mud deposits found in the deeper parts of the sea, and it seems to be a fact that during their visits to the shallower waters of the coast for the purpose of spawning they do not feed, or feed very little.
In summer the herring leaves the deep water where it has passed the winter and spring months, and seeks the coast where it may deposit its ova, and where they may be exposed to the influences of oxygen, heat, and sun-light, which are essential to their development. They are generally followed by multitudes of hakes, dog-fishes, etc, and gulls and other sea-birds hover over the shoals. They swim near the surface, and are therefore easily taken by net.
It was erroneously thought in the 19th and early 20th centuries that so great is the herring's fecundity that enormous number could be taken without reducing their abundance, as many as 68,000 eggs having been counted in the roe of one female. As a result, massive drift nets were used to fish millions of Herring from the sea. However, in the mid-20th century over fishing had almost wiped out the Herring and a suspension of fishing for them was put in place until their numbers returned.
Herrings are traditionally taken throughout the year, but in the greatest quantities in summer. In Scotland the herring fishery was long one of the most important industries. Research Herring
Hainan is an island in the south China sea, forming an automonous region of China. Hainan is between the China Sea and the Gulf of Tonquin, and separated from the mainland by a channel of 15 miles, encumbered with shoals and coral reefs. It is almost oval in shape, and has an area of over 16,000 square miles. Research Hainan
The Hooghley or Hugli is the most westerly of the rivers of the Gangesdelta, in West Bengal. It is one of the Ganges mouths, is about 200 miles long and is formed by the Bhagirathi and the Jalangi, about 50 miles above Calcutta. It is 15 miles wide at its mouth, but much encumbered by shoals. At Calcutta it is about a mile wide, and has rapid and violent tides. The south-west monsoons produce a 'bore' in the Hooghley, that is, a tidal wave which rushes up the river at the rate of 15 or 20 miles an hour. Research Hooghley
Abbreviations
Research Dace
