It must not be imagined that trawling has never been advocated (indeed, it has even been experimentally practised), for we have only to look through the various Fisheries Reports to find it repeatedly referred to; unfortunately, however, these appeals so far have been without any practical results. It will, therefore, be most instructive to refer briefly to the manner in which trawling and other modes of deep-sea fishing are carried out elsewhere; and more particularly to bring under notice the enormous fish yield effected by them. Trawling, or as it is more properly termed, beam-trawling, may be described as a method of deep-sea fishing, in which a large bag net is towed along the ground so as to scoop, as it were, the fish into its receptacle. There are at least several important stations in England for trawling; some in the English Channel; some on the west, and also on the Welsh coast; and others again (amongst which is Grimsby, the largest fishing port in the world) on the east coast on the North Sea. The trawling grounds of the latter are widely known, and comprise the famous Dogger Bank, which covers many hundreds of acres in area. In its neighbourhood, also, there are numerous grounds such as the Inner and Outer Well Banks, and there are others again nearer the English coast. In addition to these there is the Great Silver Pit, discovered in a severe winter in 1843; and it has been noticed that during the winter months the fish frequent the deeper water, because the temperature is more equable than in shallow places. The depth at which trawling is usually carried on varies from 20 to 30 fathoms; never under any circumstances reaching 50 fathoms—the depth of the Silver Pit being from 35 to 45 fathoms.
It was formerly urged against trawling that it was very destructive to the spawn, at that time supposed to be lying on the sea bottom. But the investigations of the late Professor Sars, for the Swedish Government, into the spawning habits of sea fish, have conclusively revealed the fact that the ova of fish float on the surface of the water during the whole period of their development. Not only have the floating ova of the cod and haddock been reared, but the common plaice, the representative of the flatfish family, including the brill, the sole, and the turbot, is also known to spawn near the surface. The eggs of the mackerel and the garfish have likewise been found floating, and successfully hatched. Now, no fish comes so close to the land as does the mackerel, yet it is certain that it never makes its way into the estuaries and inlets till after spawning is finished—for that it spawns in the open sea is almost without a doubt. These facts consequently do away altogether with the old statements concerning the destructive results of trawling.
The yield from the English trawleries alone is computed to be over 200,000 tons annually, and as the price for trawled fish at the Billingsgate market averages 12 pounds per ton, this represents about two and a half million pounds. And, in addition to these weighty figures, Professor Huxley's words deserve to be well remembered, for, says he, "Were trawl fishing stopped, it would no longer be a case of high prices, but that ninety-nine out of a hundred would hardly be able to afford any at all—herrings and a few other fish caught in the old way excepted." Indeed, it is chiefly by this method of beam trawling that London and the interior are supplied with brill, turbot, and soles; while by it thousands of tons of plaice, haddock, and other fish are brought within the reach even of the poorest.
DRIFT-NET AND OTHER DEEP-SEA FISHING.
Important though the beam-trawl may be, there is another mode of deep-sea fishing which deserves to be well known by us in Australia, and which undoubtedly must come into general use before we can make any pretensions with regard to our fisheries. I refer to that by means of drift-nets. As the trawl is absolutely necessary, on the one hand, for capturing fish which frequent the bottom, so, on the other, the drift-net is essential for those whose resort is the upper portion of the sea. It is by this method alone that fish like the herring, the mackerel, and the pilchard—which may be termed surface fish—are caught in great quantities for food supply.
Now, in Australia, we have vast shoals of migratory fish visiting the coast at different periods of the year. During the winter season enormous numbers of herrings come to these shores, and are permitted to depart without any effort being made to capture them. Attention has been repeatedly called to this strange neglect in our fisheries, for this herring is plentiful and is considered to surpass the famous Scottish herring itself in flavour. The mackerel, too, is to be met with annually, generally about midwinter, in immense shoals, passing near the coast upwards in a northerly direction. The sea mullet also makes its appearance towards the end of the summer months, usually from April to June, at the very time when it is in splendid condition and full of roe. It is always observed to be proceeding towards the north in successive shoals and in great numbers. Many consider its richness and delicacy of flavour to be unequalled. The driftnet system of fishing would be well adapted for it—if the meshes were larger than those for the herring—as when fully grown it is nearly two feet in length. And lastly, it will only be necessary to speak of the "maray," which is practically the English pilchard. As with the fish just mentioned, it is met with about midwinter, passing up north in countless numbers, sometimes covering miles of sea.
As the name implies, drift-nets are not worked from the shore, but they are "shot," as the saying is, in the open sea, and allowed to drift in whatever direction the tide may take them. Each drift-net will measure about 180 feet in length by about 30 feet in depth. They are secured to one another at the ends to form a long single line, perhaps two miles in length. By means of floats the nets hang perpendicularly in the water, thus forming a long wall against which the fish "strike," and get enmeshed by being caught in the gill opening. The nets are kept on the stretch by being "shot" in the face of the wind, and the vessel from which they are paid out, being to leeward of them, drifts more rapidly than they do, and consequently keeps them well extended.
My object, however, is not so much to enter into the details of these different methods of deep-sea fishing as to indicate their value and necessity, if we are to have any fisheries worth speaking of. I shall, therefore, do no more than briefly mention a few other modes of fish capture. Thus, at the mouth of the Thames, thousands of tons of sprats are caught every winter by means of the large bag net, known as the stow net. In shape it is like an enormous funnel, 30 feet high, 20 feet wide, and nearly 180 feet in length. By means of this contrivance the yield of sprats is so great that there is often some little difficulty in disposing of the catch. The renowned whitebait, too, which are believed to be young herrings, are caught by means of a similar, though much smaller, net.
Besides these and various other forms of net fishing, there are the methods in which the long line is employed. For the capture of the cod, both in Newfoundland and in the North Sea, what is called the bultow is used. This is a long line many hundreds of-feet in length, and at every twelfth foot shorter and smaller cords called "snoods" are fastened. These "snoods" are about 6 feet long, and have the hooks attached to their free ends. The bultow is "shot" across the tide to prevent entanglement of the hooks, and is laid in the afternoon. At daybreak, when the lines are hauled in, as many as 400 of the large cod sometimes result from the catch. There are various other appliances used for fish capture in different parts of the world, such as the purse-seine net, the trammel net, the otter-trawl net, &c.; and, as I have already pointed out, the most scathing satire on our fisheries is to find all these necessary means for catching fish regarded as curiosities. When they are no longer considered so, it will be a fortunate time for Australia.