The Natural Oyster Beds
While there has been much discussion whether oysters were ever native in Massachusetts Bay, or merely the result of southern “plants,” the consensus of opinion is that there were natural oyster beds in existence when the first settlers came to this coast. Not only do historical records show this, but the remains of the natural beds at the present time indicate that oysters have existed for centuries. Thus there seems to be no reasonable doubt that the northern coast of Massachusetts, as well as the southern, once possessed extensive natural oyster beds.
I. Location of the Natural Oyster Beds.—(1) Parker River.—A natural bed of oysters once existed in the Parker River at Newbury, and even fifty years ago it is said that oysters could still be obtained from this natural bed. About 1882 the experiment of fattening oysters for market was made, and many bushels were bedded on the flats during the summer by an oyster firm at Newbury. These oysters not only grew well, but threw considerable spawn, furnishing a good set in the river. Oyster raising was then tried, but the result was a failure, as the oysters which were planted in too shallow water were killed during the winter.
(2) Mystic and Charles Rivers.—Mr. Ernest Ingersoll states that: “In 1634 William Wood, in his ‘New England’s Prospect,’ speaks of ‘a great oyster bank’ in Charles River, and another in the ‘Mysticke,’ each of which obstructed the navigation of its river.” He locates the Charles River beds as either off Cambridgeport or near the site of the Boston Museum of Natural History.
Dr. G. W. Field, chairman of this department, in his report in 1902 as biologist to the Charles River Dam Commission, makes the following statement about the Charles River oyster:—
The oyster (Ostrea), formerly abundant, is no longer living, and, from what indications I have been able to gather, probably became extinct within twenty-five years. Their dead shells are brought up by dredging operations. Their peculiar elongated shape is the result of growth being concentrated at the upper end, as a result of their closely crowded position in the bed, or of an attempt to keep the opening above the accumulating mud, and thus avoid being smothered. The fact that there are few signs of small “seed oysters” tends to prove that the bottom was so muddy that they found few places to “set.” From the elongated shape of the shells may be inferred that the amount of sedimentation going on in that particular region was rapid during the life of the group of oysters whose shells are to be found in quantities in the material dredged between Harvard and Brookline bridges. This sediment need not necessarily have been sand or clay, or any material which is persistent, but it might have been flocculent organic débris, which remained but a short time and left little or no evidence, beyond its effect upon the shape of the oyster shells.
In the above account Dr. Field not only locates the original oyster beds of Charles River, but also furnishes evidence which indicates the cause of their extinction, i.e., the débris and sewage, or waste poisonous, polluting materials, of a large city emptying into the river. This is not only true of the Charles, but also of the Mystic and Taunton river beds, which have been destroyed in like manner.
(3) Mr. Ernest Ingersoll, in his report on the “Oyster Industry of the United States,” in 1880 mentions that natural oyster beds were once at Weymouth, Ipswich, Barnstable and Rowley. Nothing further can be learned concerning these places.
(4) Wellfleet.—An extensive oyster bed was found at Wellfleet Bay, which not only furnished a sufficient supply for the first settlers, but enabled the inhabitants of Wellfleet to carry on a considerable trade by shipping them to Boston and other ports, until it was finally destroyed in 1775. Its destruction was due to overfishing and the utilization of the shells for lime, which soon destroyed the natural bar.
(5) Chatham.—A natural oyster bed once existed in the Oyster Pond, but no trace of it now remains.
(6) Harwich.—Herring River in the town of Harwich still possesses the remnants of a natural oyster bed, as occasionally a few oysters can be gathered along its banks. This bed once comprised a stretch of three-quarters of a mile along the river.
(7) Yarmouth.—The town of Yarmouth once possessed a natural oyster bed in Mill Creek, but this was fished out by 1895 and then granted for oyster culture.
(8) Barnstable.—There is a natural oyster bed at Centerville.
(9) Martha’s Vineyard.—Native oysters are said to have existed in the brackish ponds on the south side of the island; a few are found there at the present time.
(10) Falmouth.—A few native oysters are to be found in the salt ponds on the south coast of the town. In Squeteague Pond and Wild Harbor oysters were once native.
Buzzards Bay comprises the best natural oyster territory in the State. At the present time the natural oyster industry has been supplanted by oyster culture, which gradually took the place of the declining natural oyster fishery. While natural beds still exist to some extent, they are, to all practical purposes, extinct. Where once there were extensive areas, now there are only scattering oysters. In many cases the beds have been so completely destroyed that the ground has been granted for oyster culture. That Buzzards Bay is a “natural set area” can be readily seen by the amount of “seed oysters” that are caught by the oystermen who plant shells for the purpose.
(11) Bourne.—(a) Red Brook Harbor.—In 1879 Ernest Ingersoll says:—
On the southern shore of this harbor, about a mile from its head, exists a living bed of natural oysters some 7 acres in extent, under the protection of the town for public benefit. The oysters growing on it are reported to be large, but not of extraordinary size, scalloped and roundish, differing in no respect from aged oysters grown after transplanting to another part of the bay.
In 1907 this natural bed had been reduced to 3 acres, and the unproductive part granted.
(b) Barlow River.—In 1873 an act was passed to protect the oyster fishery in Barlow River, by ordering a closed season of one and one-half years. The passage of this act shows that a natural bed of importance existed in this river, and that even in 1873 the effects of overfishing were apparent. At the present time there are but few native oysters in Barlow River, or, as it is sometimes called, Pocasset River.
(c) Monument River.—A natural bed also existed in Monument River, which became so depleted that about 1875 the river was surveyed and divided into small grants.
(12) Wareham.—(a) Wareham River.—Natural oysters are found in the Wareham or Agawam River, which has been one of the most productive natural beds in the State, and still furnishes a scant living for two or three men. In view of the overfishing, it is surprising that any of the natural oysters have survived, except on reserved areas of the town, which are opened every three or seven years for the capture of “seed.”
(b) Weweantit River.—The Weweantit River, which lies between the towns of Wareham and Marion, has a larger and better natural oyster bed than the Wareham River, but this has also been depleted by overfishing, except on the reserved areas of the town of Wareham.
(13) Dartmouth.—A few oysters are found in Slocum’s River.
(14) Westport.—Westport River has also a few oysters.
(15) Taunton River, Coles River and Lee’s River.—These rivers once had extensive beds of natural oysters, but now are wholly devoted to growing oysters. Old records and laws show how important these natural beds were, and also furnish an excellent illustration of the effects of overfishing combined with water pollution from manufacturing sources.
II. Decline of the Natural Oyster Beds.—The above-mentioned examples furnish abundant proof that the natural oyster beds of the State, which once were sufficient to supply the wants of our forefathers, have declined to such an extent that at the present time but few natural oysters are tonged for the market. Where there were formerly many acres of excellent native oysters, to-day there is scarcely an acre that can be called good oyster fishing, except in a few cases where the towns maintain a nearly perpetual closed season. No proof of the decline is necessary; it is an established fact.
There have been two principal causes which have ruined the natural oyster beds; besides these two,—(1) water pollution and (2) overfishing,—certain geographical changes have doubtless occurred, which have accelerated the decline.
(1) Water Pollution.—The effect of water pollution through the sediment deposited by sewage and manufacturing waste on the natural oyster beds is well illustrated by the destruction of the Charles River beds. This is also shown in a less degree in the Taunton River.
(2) Overfishing.—The primary cause of the decline of the natural oyster beds was overfishing. This is particularly true of the beds south of Cape Cod and in Buzzards Bay, which were of large extent, and unpolluted by manufacturing wastes or sewage. This overfishing has not been the result of the last few years, since records show that as early as 1824 Harwich passed an act to preserve the oyster fishery of the town; and that Sandwich, in the part which is now the town of Bourne, in 1832 passed regulations protecting the natural oyster fishery in Monument River; while at Wellfleet the natural oyster bed was completely exterminated by the year 1775. Overfishing has affected the natural beds in several ways, all of which have worked toward the general decline of the native oyster.
(a) The first settlers took the large oysters from the natural beds, which under normal conditions had all they could do to keep up the supply. In this way the beds were deprived of the spawning oysters, with the result that in spite of the closed seasons, which gave little if any benefit, a gradual decline set in.
(b) At the same time that the oysters were being taken from the beds, the early oystermen through ignorance were making an economic blunder by not returning the shells to the waters. The oyster shells furnish naturally the best surfaces for the collection of “seed,” as spat will set only on clean surfaces. By taking the large oysters and with them the shells and other débris from the bed, the natural oyster bars were destroyed and less space given for the spat to catch. So both the taking of the large oysters in excessive amounts and the destruction of the natural spat collectors, either for lime, as was done at Wellfleet, or for other purposes, were sufficient in the early days to cause the decline of the natural oyster beds.
(c) In more recent times the destruction of the natural beds has been hastened by the taking of the small oysters. This practice was due to two reasons: (1) the supply of large oysters was exhausted; (2) oyster culture became important, and the natural beds were raked clean for “seed” which the oystermen obtained for planting on their grants. Thus the oyster grant system has been the chief cause of the destruction of the natural beds in the last forty years. It was only when the natural beds failed that grants were given, and so oyster culture cannot be considered the primary cause of the destruction of the natural beds, but only a later agency in their total extermination. The natural beds in Buzzards Bay all bear testimony to these three means of overfishing, and in recent years particularly to the last.
It has been a most fortunate thing for Massachusetts that the oyster grant system was inaugurated as soon as the decline of the natural fishery became manifest, else at the present time there would be no oysters in the State, for it is recognized that the present natural beds are perpetuated by the spawn which comes from the various oyster grants. Foresight has indeed provided an excellent oyster industry, which is rapidly improving. It is only necessary to apply similar methods of culture to the other shellfish industries of the State to insure their future also; otherwise the decline, which is following the same steps as the destruction of the natural oyster beds, will lead to the commercial extinction of these valuable fisheries.