Part 21

It is not difficult to determine the reasons for the failure of the culture experiment at Essex. The areas upon which clams were planted were those which were at the time unproductive. The beds still containing clams--the "town flats"--were free to any native of Essex. The one thing which was absolutely necessary to the success of any planter was that the clams on his leased ground should not be disturbed by other diggers. This protection was apparently not given in any case by the town authorities, and, as no person lived within sight of the majority of the beds, it was quite impossible for any man to guard his property much of the time.

As to what followed it is not easy to obtain definite testimony from the clammers themselves. Other citizens of the town, however, and some few clammers, intimate that most of the men began to take clams from any property but their own, and that in this way the full result of no man's labor in planting was ever realized. Others who did not make clam digging a regular business, but only dug occasionally, are said to have had no respect for the rights of those who had leased property. It was said that at times when vessel builders and the shoe factory released employees, many of them, for lack of other occupation, turned their attention to clam digging, with the result that too many clams were at the time taken from the flats.

Another reason for the failure of the Essex experiment is that a number of short-sighted clammers began to fear, after the clams had been planted, that the production might suddenly become so great as to glut their market, and, as a consequence, force prices down. Some few individuals, inspired by this fear, are reported to have said and to have done everything in their power to prevent the success of the experiment. In all cases, it is said, the selectmen of the town, who issued the leases, refused their aid in the prosecution of trespassers.

In spite of the fact, which had been demonstrated in the experiment, that when properly planted the clams grew much more rapidly and became much larger than on the natural beds, no applications for a renewal of the leases were made when the first ones expired. No change in the condition at Essex may be hoped for until there is some evidence that a law protecting the planter will be strictly enforced. With proper protection, a great industry might, and probably would, be quickly established, not only in Essex, but in any region where clam flats are now unproductive because of excessive digging.

_Protection Necessary._--The same lack of protection which ruined the Essex clam experiments has been the cause of similar failures in other shore towns. As long as no protection is given, clam farming can never become possible, as the whole success of the enterprise depends wholly upon the planter's having complete control of his land. The present law gives absolutely no protection, as according to the old free beach law a person has a right to dig a mess of clams anywhere between the tide lines, no matter whether natural or planted. This practically discourages clam farming, however profitable, as no clammer is going to the labor and expense of planting clams, if the next person who comes along has a legal right to dig as many as he pleases. Until a law is passed which gives to the clam planter absolute protection from this sort of trespassing, and does away with the antiquated free fishing law, clam culture can never become a successful industry.

_Present Clam Culture._--In 1906 grants of barren flats were again issued for the purpose of clam culture in Essex, and this time the attempt seemed successful. Two things encouraged this: the excellent results of the experiments in Essex River by the Commission on Fisheries and Game, and the possible results indicated by the experiments of 1888. The only protection for these clam grants is by public sentiment, and the mutual agreement of all the clammers to respect the rights of the individual. So far there has been no trouble from trespassing and the lack of protection, which caused the failure of first attempts. It is hoped that these clam farms will become permanently successful, despite the lack of protection, as they will greatly increase the production of the Essex clam flats.

_Clam Farming and Agriculture._--The comparison between clam farming and agriculture is very close, and both possess many common features, though there are several points of difference. The clam obtains its sustenance entirely from the water, while agricultural products obtain their nourishment chiefly from the soil. The nitrogenous waste products of the land washed into the streams furnish the nourishment to the little marine plants (diatoms) on which the clams feed.

_Rate of Growth of the Clam._--The report of the Commission on Fisheries and Game for the year 1906 contains the following statements:--

_What is the natural growth of the clam per year?_

There is great diversity in the growth of the clam, owing to the location in respect to three essential conditions,--current, length of time submerged, and soil. The following figures give briefly the general trend of results from numerous experimental beds under great variety of conditions. For simplicity, a 1-inch clam is taken as the standard.

A 1-inch clam will grow in one year to a size between 2 and 3 inches. Under fairly favorable conditions, with a moderate current, a 1-inch clam will increase to 2½ inches, or a gain of 900 per cent, in volume. For every quart planted, the yield in one year will be 9 quarts. For beds without current, 1-inch clams average about 2 inches, or a gain of 500 per cent.; _i.e._, five quarts for every quart planted. Beds under exceptionally fine conditions have shown the amazing return of 15 quarts for every quart of 1-inch clams planted. Clams increased in these beds from 1 to 3 inches in length. Therefore, by planting clams 1 inch or over, under _favorable_ conditions a _marketable_ clam can be produced in _one year_.

_What is the maximum production per square foot?_

The number of clams per square foot that can be raised to the best advantage depends upon the location of the flat in respect to natural conditions. Clams thickly planted (15 to 20 per square foot) in favorable locations may show a greater growth than when thinly planted (5 per square foot) in less favorable locations; therefore, no definite statement can be made which will apply in all cases. The only rule that can be given is that a flat with a current will produce a greater number of clams per square foot than one without a current. On good flats clams can be planted conveniently and economically from 10 to 15 per square foot, or even a larger number.

_What results can be obtained by planting on barren flats?_

There are two groups of flats which come under the term barren: (1) flats which once produced clams in great numbers, but now are practically barren, except for an occasional clam here and there; (2) flats which never have produced clams, and on which for physical reasons clams can never grow. The first group of flats is alone considered in this answer.

Experimental beds were planted on certain flats in the Essex River which come within the first group of barren flats. These once productive flats had been cleaned out in the past, and for some reason had not seeded naturally. Forty beds were laid out under all kinds of conditions, with the object of finding a way to make these once more productive. Results have been all that could be hoped for. Only 4 poor beds were found, out of the 40 laid out; 36 beds were in thriving condition. It should be noted that no attempt was made to choose the best places, but all conditions were tried. Over two-thirds of the clams were re-dug, the increase averaging, in terms of 1-inch clams, over 1,000 per cent., or 10 quarts for every quart planted the year before.

If many acres of Massachusetts flat, idle at present, are capable of such a yield, should such economic waste be allowed? Why should not the towns, by the expenditure of a little money, restock flats such as these for the benefit of their inhabitants? I do not say that all flats can be made productive in this way, as I know of many cases where the mere sowing of seed clams will not restock a flat; but I do say that Massachusetts possesses enough flats of the former nature, which should be made a profit to her clammers. Clam set occurs, as Mr. Stevenson shows in his report, in large quantities; the transportation of seed clams is easy; planting requires little labor, the practical way being to sow the clams, which burrow readily; while the yield in proportion to the labor is enormous.

_What sized clams are best for planting?_

The size best adapted must be determined for each flat. Shore flats with little current will allow the planting of any size, from ¼ inch up; flats with a swift current necessitate a larger clam (1 to 1½ inches), as the smaller will be washed out of its burrow; soft mud also demands a larger clam, as the smaller will be stifled by the oozy silt.

_What are the physical conditions that influence the growth of clams?_

There appear at least three essential conditions for rapid growth of clams: (1) a good current; (2) low and level flat; and (3) a tenacious soil, relatively free from decaying matter.

A low flat gives the clams longer feeding periods, as the water remains over them longer, therefore there is a greater growth. This has been experimentally shown by Dr. A. D. Mead.

According to Prof. J. L. Kellogg, clams cannot do well in a soil which contains much decaying organic matter, as the acids eat away the shells. Soils of this description also facilitate the spread of infection from one clam to another.

Current is the chief essential for successful clam culture. The term "current" does not imply a rapid flow of water, but rather a good circulation of water over the flat. In the Essex and Ipswich rivers the clam flats have a continuous current. On such flats the growth is more rapid than on flats which have no circulation of water, in addition to the mere rise and fall of the tide. The current performs the work of (1) keeping the flats clean and carrying away all contamination, but its most important work is as (2) _food carrier_.

_Value of a Clam Farm._--The value of an acre of clam flats, if properly cultivated, is about $450 per year for the average clam flat. Many of the more productive flats will yield a far greater amount, while others will not yield as much. It has been often erroneously stated that an acre of clam flats would produce $1,000 per year. This is a decided overestimation, as it would be hardly possible for the most productive flat to yield that amount. It is possible, however, for a good flat to yield about $750 per year, but this is only under the most favorable conditions. Such yields as these are large for the clammer, whose average yearly income is only $400 (a few of the more expert clammers make possibly $700 to $750), and a man possessing a clam farm of 1½ to 2 acres would make a good living.

_Method of operating a Clam Farm: choosing the Ground._--In choosing a grant, the planter should have in mind three things: (1) the accessibility of the grant, for his own convenience, and nearness to the market, as much of the success of clam farming depends upon the expense of marketing the product, and the ease with which it can be disposed of; (2) the length of time allowed for labor by the exposure of the flat (flats vary greatly in the amount of time exposed each tide, the low flats being submerged nearly all the time, and the high flats having a much longer exposure),--a high flat possesses the advantage of allowing a longer working period for the clammer; (3) the natural facilities of the flat itself as regards the growth of clams. Moreover, the flat should be chosen in regard to (1) soil; (2) current; (3) tide. A good flat should have a soil which is tenacious and compact, affording at the same time easy digging. Probably the best soil is a mixture of fine sand and mud in a ratio of one-third mud to two-thirds sand, as this amount of mud gives the right degree of tenacity.

The growth of a clam depends upon the circulation of water over the flat, as the current carries the food, and, therefore, the more current the more food for the clams. Current also keeps the bed clean, and prevents contamination and disease from spreading among the clams. Then, again, the growth of a clam depends upon the amount of water over the bed; _i.e._, length of time covered. The clam can only feed when the tide is over the bed, and thus the feeding time is limited for the higher flats. While experiments have shown that clams grow faster when continually under water than when exposed part of the time, the question of tide is not so great a factor as that of current in regard to clam growth, and can be almost disregarded.

The best flat for clam planting is a _fairly high flat_ with a _good current_ over it, as it gives nearly as rapid growth and a much longer period to dig than a flat which is exposed only a short period. This flat must have the right kind of soil, which must not be shifting sand or too soft mud, but a compact, tenacious mixture.

_The Seed Clams._--Nature has provided the means of stocking these farms. The set of clams is usually restricted to certain localities, which, however, vary from time to time, and heavy sets are found in limited areas. These sets run as thick as 2,000 per square foot of surface, occasionally covering an area of 3 acres. From these natural set areas the natural clam flats are partially restocked by the washing out of the small clams. More often these whole sets are wasted, as the clams, instead of washing on the good flats, are carried to unproductive places and consequently perish. Thus there are areas of heavy set which are of no use to any one, as practically all the clams perish before they become adults. These areas of heavy set occur in nearly every harbor of the coast to a greater or less extent, and are available for nearly every town.

The problem now is to make use of these large sets, and not allow them to go to waste. It has been shown that these clams when transplanted will grow much faster, and will not perish; therefore, clam farming offers both the possibility of saving these natural sets and utilizing barren ground.

Methods of spat collecting have been constantly referred to in connection with clam farming, especially by the Rhode Island Fish Commission, and the impression has been given that clam farming can never become a success until some practical method of spat collecting has been found. With the soft clam there is no need of any method of spat collecting, as the natural set is more than sufficient for restocking the barren flats. All that is necessary is to utilize the enormous natural sets. If this is done, the barren flats of Massachusetts can be made productive.

The main difficulty is in devising some method of obtaining the small clams with sufficient rapidity. As the nature of the soil and the size of the clams vary, no one method can apply to every case, and it depends upon the ingenuity of the clammer. The methods used at present are: (1) digging with an ordinary clam hoe, which is slow work; (2) digging in shallow water, so that the clams may be washed out; (3) digging a series of trenches across the heavy set area, and scooping out the clams washed in these trenches; (4) carrying both sand and clams by the dory load; (5) by using a sieve, in the form of a cradle, which washes the clams out in the water. This last method is the most successful for small clams, and has been used by the commission in obtaining seed clams for their experimental beds. By using a cradle 3 by 2 feet, covered with sand wire netting, clams which ran 3,000 per quart, were obtained by 3 men at the rate of 2 bushels an hour,--an amount sufficient to plant from 1/25 to 1/10 of an acre.

Another problem of importance is the transportation of seed clams, as in many instances the clams will have to be carried some distance. The best method of shipping seed clams is to pack them dry in damp sea weed, putting them in small packages, so they will not be crushed by their own weight. The best though most expensive method is to pack the clams in crates, such as are used for strawberries. It has been found that clams kept in water are not in such good condition as those shipped dry, and it is of the utmost importance that the clams be in good condition when planted.

The length of time a clam will live out of its natural element depends upon the temperature; in cold weather it will keep for several days, and even weeks; while in warm weather the seed clam will be in poor condition after one day's exposure.

_Preparing the Grant._--Usually the ground needs no preparation, and the clams can be planted at once. It is a good plan to remove any mussels and any of the enemies of the clam from the grant.

_Planting the Clams._--The planting of the seed clams is perhaps the easiest work of the clam culturist, as it necessitates merely the sowing of the seed on the surface of the flat. The small clams when left this way burrow into the ground as soon as the water is over them, and require no planting on the part of the culturist.

_Working the Farm._--This style of farming requires no cultivation for the growth of the clams. Once planted, the farmer has no further work until the time when he is ready to dig them. The clams grow better when undisturbed than when the soil is upturned by frequent digging. Protection from man and the natural enemies of the clam demand the attention of the owner at all times.

_Harvesting the Clams._--The time of digging will vary as to the size of clam desired and the rate of growth on the grant. The clam farmer can cater to a particular trade by regulating the size of the clams marketed. He may find it more profitable to market a small clam after a short period of growth, or _vice versa_, on the same principle that a farmer raises hogs for the market.

North of Boston, in localities favorable for fast growth, such as the Essex and Ipswich rivers, by planting large seed of at least l½ inches in the spring, marketable clams of 2½ to 3 inches can be obtained in the fall after six months' growth. Here the clams grow only during the summer months, and nothing would be gained by leaving them over winter. In this way a crop each year can be raised on these farms. In other localities of slower growth it will take from eighteen to twenty-four months to raise a crop. The clam farmer will have to regulate the size of the seed and length of growth to best suit the needs of his farm.

_Advantages of Clam Farming._--Clam culture possesses several advantages over the old free-for-all digging: (1) steadier returns; (2) easier work; (3) better pay; (4) more clams per man. If the clammers of the Commonwealth only realized these facts they would make a united effort toward clam culture.

_History._

I. _Early History._--The history of the Massachusetts clam industry began in obscurity. Even before the time of the earliest settlers the native Indians depended largely upon this abundant mollusk for their food supply, as is clearly indicated by the scattered shell heaps which mark their ancient camp fires. Upon the arrival of the Pilgrims, clam digging was incorporated among the most time-honored industries of the Commonwealth, and in times of want the early colonists depended largely upon this natural food supply. With the arrival of the colonists really began the first epoch of the clam fishery as an economic factor in this Commonwealth, a period which lasted nearly two hundred years. This period marked the exploitation of clam grounds merely for home consumption. Money was scarce, inland markets were practically unknown, and the importance of this shellfish was confined merely to local quarters.

II. _Rise of the Bait Industry._--Early in the last century a growing demand for clams as bait for the sea fisheries became apparent. Clams had always been utilized for this purpose more or less, but an increased demand called for the development of an important industry in this line. Various centers of activity were established, particularly at Newburyport, Essex, Ipswich, Boston harbor and Chatham. The clams were mainly shucked, that is, removed from the shell, and shipped either fresh or salted in barrels to the fishermen at Gloucester, Boston and Provincetown. This industry opened up new fields of employment for many men and boys, and brought considerable ready money into various coast communities.

III. _The Development of Inland Markets._--The consumption of clams for food in the coast towns continued throughout the rise and gradual decline of the bait industry, but the creation of inland markets did not begin to be an important factor until 1875. It was about this time that the clam came to be generally looked upon throughout the State as an article of food, and consequently an important industry was gradually evolved to meet this growing demand. This step marked the beginning of the extensive fishery of the present day.

The mistaken policy of the average shellfish community, which regarded clam grounds as natural gardens of inexhaustible fertility, still persisted even after the fallacy of this policy had long proved apparent through the depletion of extensive tracts. The same ill-advised methods were pursued to the ultimate ruination of much valuable territory. All wise regard for the future was overshadowed by the immediate needs of the present; local legislation fostered the evil; State legislation was conspicuous by its absence; and, left to the mercy of unsystematic overdigging, these natural resources rapidly wasted away.

The disastrous tendencies which have lurked in the ruling policy of the clam fishery have been shown in the rise and fall of the industry in certain localities. Forty years ago Duxbury and Plymouth ranked as the greatest clam towns of the coast. Their supply has long since become insignificant. Newburyport and Ipswich have become the chief producers of the State clam harvest; but Essex and Gloucester, in the same fertile regions, have greatly declined, and the industry at Rowley has become nearly extinct. In the Fall River district the digging of small seed clams for food has brought the fishery to the verge of ruin. The few resources of Buzzards Bay have become nearly exhausted, while on Cape Cod the industry has shown here and there a temporary increase, overshadowed by a far more extensive decline, such as at Chatham. Furthermore, the sewage contamination of coast waters in the harbors of Boston and several other large cities have closed extensive regions for the production of food.