Tales Of Fishes (1928) (18 page)

The swordfish comes into our waters in pursuit of its food. At least this is the most probable explanation of its movements, since the duties of reproduction appear to be performed elsewhere. Like the tuna, the bluefish, the bonito, and the squiteague, they pursue and prey upon the schools of menhaden and mackerel, which are so abundant in the summer months. "When you see swordfish, you may know that mackerel are about," said an old fisherman to me. "When you see the fin-back whale following food, there you may find swordfish," said another. The swordfish also feeds upon squid, which are at times abundant on our banks.

To what extent this fish is amenable to the influences of temperature is an unsolved problem. We are met at the outset by the fact that they are frequently taken on trawl lines which are set at the depth of one hundred fathoms or more, on the offshore banks. We know that the temperature of the water in these localities and at that depth is sure to be less than 40| Fahr. How is this fact to be reconciled with the known habits of the fish, that it prefers the warmest weather of summer and swims at the surface in water of temperature ranging from 55| to 70|, sinking when cool winds blow below? The case seemed clear enough until the inconvenient discovery was made that swordfish are taken on bottom trawl lines. In other respects their habits agree closely with those of the mackerel tribe, all the members of which seem sensitive to slight changes in temperature, and which, as a rule, prefer temperature in the neighborhood of 50| or more.

[Illustration: THROWING WHITE WATER LIKE THE EXPLOSION OF A TORPEDO]

The appearance of the fish at the surface depends largely upon the temperature. They are seen only upon quiet summer days, in the morning before ten or eleven o'clock, and in the afternoon about four o'clock.

Old fishermen say that they rise when the mackerel rise, and when the mackerel go down they go down also.

Regarding the winter abode of the swordfish, conjecture is useless. I have already discussed this question at length with reference to the menhaden and mackerel. With the swordfish the conditions are very different. The former are known to spawn in our waters, and the schools of young ones follow the old ones in toward the shores. The latter do not spawn in our waters. We cannot well believe that they hibernate, nor is the hypothesis of a sojourn in the middle strata of mid-ocean exactly tenable. Perhaps they migrate to some distant region, where they spawn.

But then the spawning-time of this species in the Mediterranean, as is related in a subsequent paragraph, appears to occur in the summer months, at the very time when the swordfish are most abundant in our own waters, apparently feeling no responsibility for the perpetuation of their species.

The swordfish, when swimming at the surface, usually allows its dorsal fin and the upper lobe of its caudal fin to be visible, projecting out of the water. It is this habit which enables the fisherman to detect the presence of the fish. It swims slowly along, and the fishing-schooner with a light breeze finds no difficulty in overtaking it. When excited its motions are very rapid and nervous. Swordfish are sometimes seen to leap entirely out of the water. Early writers attributed this habit to the tormenting presence of parasites, but this theory seems hardly necessary, knowing what we do of its violent exertions at other times.

The pointed head, the fins of the back and abdomen snugly fitting into grooves, the absence of ventrals, the long, lithe, muscular body, sloping slowly to the tail, fits it for the most rapid and forceful movement through the water. Prof. Richard Owen, testifying in an England court in regard to its power, said:

"It strikes with the accumulated force of fifteen double-handed hammers. Its velocity is equal to that of a swivel shot, and is as dangerous in its effect as a heavy artillery projectile."

Many very curious instances are on record of the encounter of this fish with other fishes, or of their attacks upon ships. What can be the inducement for it to attack objects so much larger than itself is hard to surmise. We are all familiar with the couplet from Oppian:

Nature her bounty to his mouth confined, Gave him a sword, but left unarmed his mind.

It surely seems as if temporary insanity sometimes takes possession of the fish. It is not strange that when harpooned it should retaliate by attacking its assailant. An old swordfisherman told Mr. Blackman that his vessel had been struck twenty times. There are, however, many instances of entirely unprovoked assaults on vessels at sea. Many of these are recounted in a later portion of this memoir. Their movements when feeding are discussed below as well as their alleged peculiarities of movement during breeding season.

It is the universal testimony of our fishermen that two are never seen swimming close together. Captain Ashby says that they are always distant from each other at least thirty or forty feet.

The pugnacity of the swordfish has become a byword. Without any special effort on my part, numerous instances of their attacks upon vessels have in the last ten years found their way into the pigeonhole labeled "Swordfish."

|lian says (b. XXXII, c. 6) that the swordfish has a sharp-pointed snout with which it is able to pierce the sides of a ship and send it to the bottom, instances of which have been known near a place in Mauritania known as Cotte, not far from the river Sixus, on the African side of the Mediterranean. He describes the sword as like the beak of the ship known as the trireme, which was rowed with three banks of oars.

The London Daily News of December 11, 1868, contained the following paragraph, which emanated, I suspect, from the pen of Prof. R. A.

Proctor.

Last Wednesday the court of common pleas--rather a strange place, by the by, for inquiring into the natural history of fishes--was engaged for several hours in trying to determine under what circumstances a swordfish might be able to escape scot-free after thrusting his snout into the side of a ship. The gallant ship Dreadnought, thoroughly repaired and classed A1 at Lloyd's, had been insured for u3,000 against all risks of the sea. She sailed on March 10, 1864, from Columbo for London. Three days later the crew, while fishing, hooked a swordfish. Xiphias, however, broke the line, and a few moments after leaped half out of the water, with the object, it should seem, of taking a look at his persecutor, the Dreadnaught. Probably he satisfied himself that the enemy was some abnormally large cetacean, which it was his natural duty to attack forthwith. Be this as it may, the attack was made, and the next morning the captain was awakened with the unwelcome intelligence that the ship had sprung a leak. She was taken back to Columbo, and thence to Cochin, where she hove down. Near the keel was found a round hole, an inch in diameter, running completely through the copper sheathing and planking.

"When I reflect, my dear cousin," said she, "on the miserable death of Justine Moritz, I no longer see the world and its works as they before appeared to me. Before, I looked upon the accounts of vice and injustice that I read in books or heard from others as tales of ancient days or imaginary evils; at least they were remote and more familiar to reason than to the imagination; but now misery has come home, and men appear to me as monsters thirsting for each other's blood. Yet I am certainly unjust. Everybody believed that poor girl to be guilty; and if she could have committed the crime for which she suffered, assuredly she would have been the most depraved of human creatures. For the sake of a few jewels, to have murdered the son of her benefactor and friend, a child whom she had nursed from its birth, and appeared to love as if it had been her own! I could not consent to the death of any human being, but certainly I should have thought such a creature unfit to remain in the society of men. But she was innocent. I know, I feel she was innocent; you are of the same opinion, and that confirms me.

Alas! Victor, when falsehood can look so like the truth, who can assure themselves of certain happiness? I feel as if I were walking on the edge of a precipice, towards which thousands are crowding and endeavouring to plunge me into the abyss. William and Justine were assassinated, and the murderer escapes; he walks about the world free, and perhaps respected. But even if I were condemned to suffer on the scaffold for the same crimes, I would not change places with such a wretch."

[Illustration: A LONG, SLIM SAILFISH WIGGLING IN THE AIR]

[Illustration: FIGHTING A BROADBILL SWORDFISH]

The food of the swordfish is of a very mixed nature.

Doctor Fleming found the remains of sepias in its stomach, and also small fishes. Oppian stated that it eagerly devours the Hippuris (probably Coryphuna). A specimen taken off Saconnet July 22, 1875, had in its stomach the remains of small fish, perhaps Stromateus triacanthus, and jaws of a squid, perhaps Loligo pealin. Their food in the western Atlantic consists for the most part of the common schooling species of fishes. They feed on menhaden, mackerel, bonitoes, bluefish, and other species which swim in close schools. Their habits of feeding have often been described to me by old fishermen. They are said to rise beneath the school of small fish, striking to the right and left with their swords until they have killed a number, which they then proceed to devour. Menhaden have been seen floating at the surface which have been cut nearly in twain by a blow of a sword. Mr. John H. Thompson remarks that he has seen them apparently throw the fish in the air, catching them on the fall.

"One day, when the sun shone on the red leaves that strewed the ground and diffused cheerfulness, although it denied warmth, Safie, Agatha, and Felix departed on a long country walk, and the old man, at his own desire, was left alone in the cottage. When his children had departed, he took up his guitar and played several mournful but sweet airs, more sweet and mournful than I had ever heard him play before. At first his countenance was illuminated with pleasure, but as he continued, thoughtfulness and sadness succeeded; at length, laying aside the instrument, he sat absorbed in reflection.

But little is known regarding their time and place of breeding. They are said to deposit their eggs in large quantities on the coasts of Sicily, and European writers give their spawning-time occurring the latter part of spring and the beginning of summer. In the Mediterranean they occur of all sizes from four hundred pounds down, and the young are so plentiful as to become a common article of food.

M. Raymond, who brought to Cuvier a specimen of aistiophorn four inches long, taken in January, 1829, in the Atlantic, between the Cape of Good Hope and France, reported that there were good numbers of young sailfish in the place where this was taken.

Meunier, quoting Spollongain, states that the swordfish does not approach the coast of Sicily except in the season of reproduction; the males are then seen pursuing the females. It is a good time to capture them, for when the female has been taken the male lingers near and is easily approached. The fish are abundant in the Straits of Messina from the middle of April to the middle of September; early in the season they hug the Calabrian shore, approaching from the north; after the end of June they are most abundant on the Sicilian shore, approaching from the south.

From other circumstances, it seems certain that there are spawning-grounds in the seas near Sicily and Genoa, for from November to the 1st of March young ones are taken in the Straits of Messina, ranging in weight from half a pound to twelve pounds.

In the Mediterranean, as has been already stated, the young fish are found from November to March, and here from July to the middle of September the male fish are seen pursuing the female over the shoals, and at this time the males are easily taken. Old swordfish fishermen, Captain Ashby and Captain Kirby, assure me that on our coast, out of thousands of specimens they have taken, they have never seen one containing eggs. I have myself dissected several males, none of which were near breeding-time. In the European waters they are said often to be seen swimming in pairs, male and female. Many sentimental stories were current, especially among the old writers, concerning the conjugal affection and unselfish devotion of the swordfish, but they seem to have originated in the imaginative brain of the naturalist rather than in his perceptive faculties. It is said that when the female fish is taken the male seems devoid of fear, approaches the boat, and allows himself easily to be taken, but if this be true, it appears to be the case only in the height of the breeding season, and is easily understood. I cannot learn that two swordfish have ever been seen associated together in our waters, though I have made frequent and diligent inquiry.

There is no inherent improbability, however, in this story regarding the swordfish in Europe, for the same thing is stated by Professor Poey as the result upon the habits of Tetrapturus.

The only individual of which we have the exact measurements was taken off Saconnet, Rhode Island, July 23, 1874. This was seven feet seven inches long, weighing one hundred and thirteen pounds. Another, taken off No Man's Land, July 20, 1875, and cast in plaster for the collection of the National Museum, weighed one hundred and twenty pounds and measured about seven feet. Another, taken off Portland, August 15, 1878, was 3,999 millimeters long and weighed about six hundred pounds. Many of these fish doubtless attain the weight of four and five hundred pounds, and some perhaps grow to six hundred; but after this limit is reached, I am inclined to believe larger fish are exceptional. Newspapers are fond of recording the occurrence of giant fish, weighing one thousand pounds and upward, and old sailors will in good faith describe the enormous fish which they saw at sea, but could not capture; but one well-authenticated instance of accurate weighing is much more valuable.