Chapter II: Part 2

With the exception of the disasters enumerated above, there has been but one that I can recall, and that was caused by the bursting of our barriers at Dead Brook under the pressure of a flood.

BUCKSPORT, ME, April 7, 1884.

ARTICLE V

REPORT ON THE SCHOODIC SALMON WORK OF 1884-85

By Charles G. Atkins.

_Bulletin of the United States Fish Commission_, Vol. 5, Pages 324-325, 1885.

The measurement of the stock of Schoodic salmon eggs at Grand Lake Stream at time of packing and shipment, and the record of previous losses, enable me to complete the statistics, as follows:

Original number taken ...................................1,820,810 The total losses up to that time, including the unfertilized, which were removed before packing............254,410 Net stock of sound eggs..................................1,566,400 Reserved for Grand Lake....................................397,400 Available for shipment to subscribers ...................1,169,000

These were divided among the parties supplying the funds for the work in proportion to their contributions, as follows:

Allotted to the United States Commission...................608,000 Allotted to the Maine Commission...........................234,000 Allotted to the Massachusetts Commission...................187,000 Allotted to the New Hampshire Commission...................140,000

Total....................................................1,169,000

The share of the United States Commission was assigned and shipped, under orders, as follows:

A. W. Aldrich, commissioner, Anamosa, Iowa..................50,000 E. A. Brackett, commissioner, Winchester, Mass..............25,000 H. H. Buck, Orland, Me, to be hatched for Eagle Lake, Mount Desert....................................20,000 Paris, Mich., for Michigan commission.......................50,000 Madison, Wis., for Wisconsin commission.....................50,000 R. O. Sweeny, commissioner, Saint Paul, Minn ...............50,000 South Bend, Nebr., for Nebraska Commission..................20,000 E. B. Hodge, commissioner, Plymouth, N.H....................40,000 Cold Spring Harbor, N. Y., for New York Commission..........60,000 Plymouth, N. H., for Vermont Commission ....................25,000 Plymouth, N. H., for Lake Memphremagog .....................25,000 Central Station, Washington, D.C. ..........................10,000 R. E. Earll, World's Exposition, New Orleans ................5,000 G. W. Delawder, commissioner, Baltimore .....................5,000 Myron Battles, North Creek, N................................5,000 A. R. Fuller, Meacham Lake, N. .............................20,000

F. Mather for transmission to Europe as follows: For Herr von Behr, Germany..................................40,000 For Tay Fishery Board, Scotland.............................20,000 For National Fish Culture Association, England..............30,000

Total to Europe.............................................90,000

Enfield, Maine for Maine Commission.........................58,000

Total......................................................608,000

A few of the shipments have been heard from, and these all reached their destinations safely.

BUCKSPORT, ME. March 31, 1885

ARTICLE VI

METHODS EMPLOYED AT CRAIG BROOK STATION IN REARING YOUNG SALMONID FISHES

By Charles G. Atkins, Superintendent U. S. Fish Commission Station at Craig Brook, Maine.

_Bulletin of the United States Fish Commission_, Vol. 13, Pages 221-228, 1893.

The station of the U. S. Fish Commission at Craig Brook was founded in 1889, on the same site where, in 1871, the first attempt at the artificial spawning of salmon in the United States was made. This site had been selected by the commissioners of fisheries of the States of Maine, Massachusetts, and Connecticut for that experiment because of its proximity to the salmon fisheries of the Penobscot River and the facilities presented for the maturing of the spawn that might be obtained.

The collection of spawn has been carried on in the vicinity annually from 1871 to the present time, with the exception of the three years 1876,1877, and 1878, and since 1879 the development of the spawn has been conducted constantly at Craig Brook. No attempt was, however, made to rear the fry of any species until 1886. Two years later it was definitely determined to found a permanent station at Craig Brook, and in 1889 the purchase of the grounds was effected and permanent improvements begun.

The station is located in the town of Orland, Me., 7 miles east of Bucksport, a seaport on the Penobscot River. Its territory embraces a tract of land extending between Allamoosook Lake and Craig Pond and embracing within its limits the entire length of Craig Brook, which connects those two bodies of water. Its latitude is about 44 degrees 42' N. The mean annual temperature and precipitation are believed to approximate those of Orono, 25 miles distant, namely, 42.48° F. [5.8° C.] and 45.44 inches [116 cm.]. The range of air temperature observed at the station is from 18° F. below zero to 92.5°F. above [-27.7° C. to 33.6° C.]. Frosts not infrequently occur as late as the 1st of June and as early in autumn as the first week in September. The lakes in the vicinity are commonly covered with ice before the end of November, and they are not often released until near the end of April.

The water supply is derived from Craig Brook and from three large and several lesser springs. The source of the brook is Craig Pond, which affords a constant supply of exceedingly transparent water, warm in summer and cold in winter, moderated, however; in both extremes by the water from the springs, which mingles with the brook in its lower course, forming about a third of its volume. It is this mixed water which is mainly used in the rearing of fish. Its temperature ranges from 34° F. [1.1° C.] to 70°F. [21.1°C.]. The lowest monthly mean in 1893 was 35.8° F. [2.1° C.] in February. The highest was 64.6°F. [18.1°C.] in August. The total volume is variable, ranging from 875 to 3,000 gallons and averaging about 1,200 gallons per minute.

The difference of level between the source and mouth of the brook is about 190 feet. The sharpest descent is just above the hatchery and rearing troughs, which therefore receive well-aerated water. The conformation of the ground offers good facilities for the distribution and utilization of the water.

The leading motive in the foundation of this station was the desire to apply to the Atlantic salmon the system of rearing fish to the age of at least several months before liberating them. This motive has determined not only the principal subjects of the work, but also to a considerable extent the fixtures and methods. The scheme of work was determined in outline several years before the acquisition of full title to the premises, and, circumstances rendering it desirable to enter at once on its development, it became necessary to have recourse to movable apparatus, pending authority for permanent improvements.

Hence the erection of a series of small troughs in the open air, which gave such excellent satisfaction that enlargement took the same direction; and it has thus come about that the rearing operations of the station down to the present time have been almost exclusively conducted in open-air troughs. A series of ponds has been constructed, but with the exception of a few small ones none of them have been as yet brought into use.

The troughs are for the most part such as are used in the hatchery for the maturing of spawn, and their form and size have been adapted to the hatching apparatus which has been in use at the Maine station for many years. The eggs are developed on wire-cloth trays measuring 12 and one half inches in width and length, and the troughs are therefore 12 and three quarter inches wide. Their depth is 9 inches and their length is 10 feet 6 inches. Such short troughs were adopted for two reasons:

(1) It was thought that a greater length might involve the exposure of the eggs near the lower end to the danger of a partial exhaustion of the air from the water by the eggs above them;

(2) these short troughs are very convenient to cleanse and to move about for repairs or other purposes. They are made of pine boards seven-eighths inch thick. On the inside they are planed and varnished with asphaltum. When used for rearing fish each trough is fitted with a pair of thin wooden covers reaching its entire length hinged to the sides and meeting each other, when closed, at a right angle, forming; as it were, a roof over the trough. When closed they protect from predatory birds and other vermin; when open they are fixed in an upright position, in effect adding to the height of the sides and preventing the fish jumping out. The time spent in opening and closing the troughs is by this arrangement reduced to a minimum.

Water is fed through wooden tubes, and the volume admitted is regulated by slides The exit of the water is through another tube or hollow plug standing upright near the lower end of the trough, and by its height governing the depth of the water. The outlet tube is movable and is taken out in cleaning. A wire-cloth screen just above the outlet tube prevents the fish escaping.

In a trough of standard size 2,000 fry are generally placed, and to accommodate the large numbers of fish reared we bring into use sometimes nearly 200 troughs which are of necessity placed in the open air. They are arranged in pairs with their heads against the feed troughs, supported by wooden horses at a convenient height from the ground. They are given an inclination of about 2 inches to facilitate cleaning.

The volume of water fed to each trough has varied from time to time, but is ordinarily about 5 gallons per minute, which renews the water every four minutes. The ordinary arrangement is to use the water but once in the troughs, letting it waste into some small ponds in which yearling and older fish are kept; but there is one system of 52 troughs arranged in four series, which use in succession the same water. From these we have learned that young salmon thrive quite as well in the fourth series as in the first. Indeed, by an actual test, with fish of like origin and character in each series, the fish reared in the fourth series were found to grow faster, to an important degree, than those in the first. This phenomenon probably resulted from a somewhat higher temperature which the water acquired in passing through the several series. A like observation has been made on a few salmon maintained for a few weeks, in the warmer water of a neighboring brook.

As already stated, the activity of the station has been mainly occupied with Atlantic salmon, but there have been reared each year a few landlocked salmon and brook trout, and occasional lots of other salmonoids, such as Loch Leven, Von Behr, Swiss-lake, rainbow, and Scotch sea trout. All these have received the same treatment. With the exception of the rainbow trout, they are all autumn-spawning fishes, and their eggs hatch early in the spring.

The embryos of salmon begin to burst the shell in the month of March, and the 1st of April may be stated as the mean date of hatching. If the open-air troughs are in order--and we aim to have them so--the eggs are counted out into lots of 2,000 or 4,000 each and placed before hatching in their summer quarters. The water is at that time very cold, the development of the alevins is slow, and it is not until the latter part of May that the yolk sack is fully absorbed. June 1 is, therefore, the date when feeding is ordinarily begun. The growth of the fish is at first slow, the water being still cool, but is accelerated as the summer passes away. In October and November, beginning commonly about the middle of October, most of the fish are counted out and liberated, but a small number, rarely more than 15,000, being carried through the winter at the station. The reserved fish are sometimes left until midwinter in their summer quarters, and with a careful covering of the conduits and banking of the troughs themselves each with coarse hay and evergreen boughs it is possible to keep them there the year round; but for ordinary winter storage there is provided a system of sunken tanks covered by a rough shed with a constant water supply. These tanks are molasses hogsheads, securely hooped with iron, sunk nearly their entire depth into the ground, each with an independent water supply and waste, the perforation for the latter being near the surface. They have a capacity of from 100 gallons of water upward, and will carry safely each 500 to 700 fish in their first winter, that is, just approaching the age of one year.

This arrangement has answered its purpose fairly well, and in a very rigorous climate or where the water is very cold it is to be recommended; but since its construction it has been discovered that at Craig Brook it is not at all difficult to protect the ordinary troughs in such a way as to insure their safety from freezing, and their attendance through the winter is less troublesome than that of the sunken tanks.

A list of the articles employed for food at the station since its foundation, if designed to include those used on an experimental as well as a practical scale, would be a long one, and I will content myself with naming the following: On a practical scale we have used butcher's offal, flesh of horses and other domestic animals by the carcass, fresh fish, maggots; and on an experimental scale, pickled fish, fresh-water mussels, mosquito larvae, miscellaneous aquatic animals of minute size.

In the production of maggots we have also made use of large quantities of stale meat from the markets and some barrels of fish pomace, in addition to the articles mentioned above.

The butcher's offal comprises the livers, hearts and lights of such animals as are slaughtered in Orland and Bucksport--mainly lambs and veals. These are collected from the slaughter-houses twice or thrice weekly, and preserved in refrigerators until used. The quantity of such material to be had in the vicinity has been inadequate to our needs and we have been compelled to look in other directions for food.

The flesh of horses has been used only during the season of 1893. Old and worn out horses and those hopelessly crippled or dying suddenly have been bought when offered, and used in the same way as the butcher's offal; the parts that could be chopped readily have been fed direct to the fish so far as needed; and other parts have been used in the rearing of maggots. The season's experience has been so satisfactory that greater use will be made of horse flesh hereafter.

Next to the chopped meat, maggots have constituted the most important article of food, and their systematic production has received much attention. A rough wooden building has been erected for the accommodation of this branch of the work and one man is constantly employed about it during the summer and early autumn months. The maggots thus far employed are exclusively flesh-eaters, mainly those of two undetermined species of flies--the first and most important being a small smooth, shining green or bluish-green fly occurring at the beginning of summer and remaining in somewhat diminished numbers until October, and the other a large rough, steel-blue fly that makes its appearance later and in autumn becomes the predominating species, having such hardiness as to continue the reproduction of its kind long after the occurrence of frosts sufficiently severe to freeze the ground.

In outline the procedure is to expose the flesh of animals in a sheltered location during the day, and when well stocked with the spawn of the flies to place it in boxes which are set away in the "fly house" to develop; when fully grown the maggots are taken out and fed at once to the fish. The materials used for the enticing of the flies and the nourishment of the maggots have been various. Stale meat from the markets has been perhaps the leading article, but we have also used such parts of the butcher's offal and of the horse carcasses as were not well adapted to chopping; fish, fresh dried or pickled; fish pomace from herring-oil works, and any animal refuse that came to hand.

Fresh or slightly tainted meat has been used to greater extent than any other material, and has proved itself equally good with any. Fresh fish is very attractive to the flies, and when in just the proper condition may be equally good with fresh meat, but some kinds of fish are too oily, for instance, alewives and herring, and all sorts thus far tried are apt to be too watery.

A very limited trial of fish dried without salt or smoke indicates that it is, when free from oil, a very superior article; it has, of course, to be moistened before using. Its preparation presents some difficulties, but in winter it is easily effected by impaling the whole fish on sticks and hanging them up, (after the manner of alewives or herring in a smokehouse) under a roof where they will be protected from rain without hindering the circulation of air; in this way we have dried many flounders and other refuse fish from the smelt fisheries, which are conducted with bag nets in the vicinity of Bucksport.

Doubtless a centrifugal drying machine might be successfully used for this purpose in summer. Pickled alewives, freshened out in water, have been found to answer fairly well, when other materials are lacking, at least to give growth to maggots otherwise started. Fish pomace has not thus far given satisfaction, but seems worthy of further trial.

It is commonly necessary to expose meat but a single day to obtain sufficient fly spawn; the larvae are hatched and active the next day, except in cool weather, and they attain their full growth in two or three days. To separate them from the remnants of food and other debris was at first a troublesome task. It is now effected as follows: the meat bearing the fly spawn is placed on a layer of loose hay or straw in a box which has a wire-cloth bottom, and which stands inside a slightly larger box with a tight wooden bottom. When full grown the maggots work their way down through the hay into the lower box, where they are found nearly free from dirt.

When young salmon or trout first begin to feed they are quite unable to swallow full-grown maggots. Small ones are obtained for them by putting a large quantity of fly spawn with a small quantity of meat, the result being that the maggots soon begin to crowd each other and the surplus is worked off into the lower box before attaining great size. No attempt is, however, made to induce the young fish to swallow even the smallest maggots until they have been fed a while an chopped liver.

In the above methods maggots are produced and used in considerable numbers, sometimes as many as a bushel in a day. Through September, 1893, although the weather and some other circumstances were not very favorable, the average daily production was a little over half a bushel.

They are eagerly eaten by the fish, which appear to thrive on them better than on dead meat. Having great tenacity of life, if not snapped up immediately by the fish they remain alive for a day or two, and, as they wriggle about on the bottom, are almost certain to be finally eaten; whereas the particles of dead flesh that fall to the bottom are largely neglected by the fish and begin to putrefy in a few hours. In the fish troughs there are, therefore, certain gains in both cleanliness and economy from the use of maggots which may be set down as compensating the waste and filthiness of the fly-house.

As the growth of maggots can be controlled by regulation of the temperature, it is possible to keep them all winter in a pit or cellar, and advantage is taken of this to use them during winter as food for fish confined in deep tanks not easily cleaned.

The offensive odors of decaying flesh may be largely overcome by covering it, on putting it away in the boxes, after the visits of the flies, with pulverized earth, and it is not improbable that by this or some other method the business may be made almost wholly inoffensive, but in its present stage of development it is too malodorous to admit of practice in any place where there are human habitations or resorts within half a mile of the spot where the maggots are grown.

As remarked above, only flesh-eating maggots have yet been tried. It would be well worth while to experiment with the larvae of other species, such as the house fly, the stable fly, etc. There is also a white maggot known to grow in heaps of seaweed. Should the rate of growth of either of these species be found to be satisfactory they might be substituted for the flesh maggots with advantage.

Occasional use has been made of fresh fish for direct feeding. When thrown into the water after chopping it breaks up into fibers to such an extent that it is not very satisfactory, and I do not suppose we shall use it in the future, unless in a coarsely chopped form for the food of large fish. A few barrels of salted alewives have been used, and if well soaked out and chopped they are readily eaten by the larger fish and can be fed to fry, but are less satisfactory with the latter, and like fresh fish they break up to such an extent that they are only to be regarded as one of the last resorts.

Fresh-water mussels have been occasionally gathered in the lake close to the station when there has been a scarcity of food. Those employed belong almost wholly to a species of Unio which abounds over a considerable area of soft bottom, under a depth of 2 to 10 feet of water. Many were taken with a boat dredge; more were scooped up with long-handled dip nets of special construction. Finally a wide, flat dredge was made, to be drawn by a windlass on the shore and manipulated by means of poles from a large boat.

When needed for food the mussels were opened with knives--a great task--and chopped. The meat is readily eaten by all fishes, and appears to form an excellent diet. Being more buoyant than any other article tried, it sinks slower in the water and gives the fish more time to seize it before it reaches the bottom, a consideration of considerable practical importance. The labor involved in dredging and shelling is a serious drawback, but were the colonies of unios sufficiently extensive or their reproduction rapid enough to warrant expenditure of time in experimentation; improved methods might be devised, which would put this food-source on a practicable basis.

During the seasons of 1886 and 1888 some use was made of mosquito larvae. Near the station is an extensive swamp where these insects breed in great numbers. From the pools of water the larvae were daily collected by means of a set of strainers specially devised for this use. Barrels filled with water were also disposed in convenient places near the rearing troughs, and were soon swarming with larvae from the eggs deposited by the mosquitoes on the surface of the water. When near the completion of their growth, which was only some ten days after the deposit of the eggs, the larvae (or pupae) were strained out and fed to the fish. No kind of food has been used this station that has been more eagerly devoured, and so far as our observation has gone no other food has contributed more to the growth of the fish; indeed, I am inclined to put them at the head in both respects. It was found, however, that the time expended in collecting them was out of all proportion to the quantity of food secured, and pending opportunity for further experiment their use was discontinued.

I think it quite possible that an arrangement might be devised whereby the greater part of the labor might be saved. Perhaps a series of breeding tanks arranged in proximity to the fish troughs, into which the water containing the larvae might be drawn when desirable by the simple opening of faucet, would solve the problem.

Various methods of serving the food have been tried, but at present everything is given with a spoon. The attendant carries the food with the left hand--in a 2-quart dipper if chopped meat, in a larger vessel if maggots--and, dipping it out with a large spoon, strews it the whole length of the trough, being careful to put the greater portion at the head, where the fish nearly always congregate. Finely chopped food, for very young fish, is slightly thinned with water before feeding. At one time the finest food was fed through perforations in the bottom of a tin dish; the food was placed in the dish, which was dipped into the water a little and shaken till enough of the food had dropped out of the perforations; this practice was laid aside because it was thought that the food was too much diluted.

In feeding maggots it was, at first, the practice to place them on small "feeding boards" of special construction suspended over the water in the troughs and let them crawl off into the water; but whatever advantage this method may have had in furnishing the meal to the fish slowly was more than counterbalanced by the extra labor of caring for the boards and by the offensive odor, and it was abandoned. For use in feeding fish in a pond a box containing a series of shelves, down which the maggots slowly crawl, was found sufficiently useful to be retained.

It is the common practice to feed all meat raw except the lights, which chop better if boiled first, except also occasional lots of meat that are on the point of becoming tainted and are boiled to save them. All meats fed direct to the fish are first passed through a chopping machine. The machine known as the "Enterprise" is the one now in use. It forces the meat through perforated steel plates. The plate used for the smaller fish has perforations 2 inch in diameter, and for coarser work there are two plates 3/16th inch and 3/8th inch, respectively. It is operated by a crank turned by hand.

Food is given to those fish just beginning to eat four times a day (in some cases even six times). As the season progresses the number of rations is gradually reduced to two daily. In winter such fish as are carried through are fed but once a day. The cleaning of the troughs has been a troublesome matter, and the subject of much study and experiment, but nothing more satisfactory has been found than the following practice: The troughs are all to be cleaned daily--not all at one time, but as time is found for it in the intervals of other work. To facilitate cleaning, the troughs are inclined about 2 inches. The outlet is commanded, as already explained, by a hollow plug.

When this is drawn the water rushes out rapidly and carries most of the debris against the screen. The fishes are excited, and, scurrying about, they loosen nearly all dirt from the bottom; what will not otherwise yield must be started with a brush, but after the first few weeks the brush has rarely to be used except to rub the debris through the outlet screen. Owing to the inclination of the trough the water recedes from the upper end until the fishes lying there are almost wholly out of water, but, although they are left in that position sometimes for 10 or 15 minutes, no harm has ever been known to result.

It has been the common rule at the station to count all the embryos devoted to the process of rearing, either before or after hatching; to keep an accurate record of losses during the season, and to check the record by a recount in the fall. When eggs are counted they are lifted in a teaspoon.

The counting of small fish is effected in this way: The fish are first gathered in a fine, soft bag-net, commonly one made of cheese-cloth, and from this, hanging meanwhile in the water, yet so that the fish cannot escape, they are dipped out a few at a time, in a small dipper or cup, counted, and placed in a pail of water or some other receptacle.

This counting is generally preliminary to weighing, and in this case the fish, after counting, are placed in another bag-net, in which they are lowered, several hundred at a time, into a pail of water which has been previously weighed, and the increase noted. With care to avoid transferring to the weighing pail any surplus water, this is a correct method and very easy and safe for the fish.

In conclusion, I submit some estimates of cost. In September, 1893, we fed fry that were estimated at the close of the month to number 238,300. There were also a few hundred larger fish.

From the known total outlay for food, attendance, and superintendence a suitable allowance is made for the maintenance of the older fish, and the balance is charged to the fry. By this method we arrive at the following results:

Cost...................Total........Per fish. Food $155.00 $0.00065 Attendance 99.79 .00042 Superintendence 205.96 .00086 Total 460.75 0.00193

Applied to the rearing operations of 1891, a similar calculation gives us this result: The fry that were carried through the season from June to October, inclusive, cost, for food, attendance, and superintendence, $0.0081 each; that is, about four-fifths of a cent each for the term of five months.

ARTICLE VII

NOTES ON THE CAPTURE OF ATLANTIC SALMON AT SEA AND IN THE COAST WATERS OF THE EASTERN STATES

By Hugh M. Smith, M. D., Assistant in charge of Division of Statistics and Methods of the Fisheries.

_Bulletin of the United States Fish Commission_, Vol. 14, Page 95, 1894.

In carrying out its most important function--the maintenance and increase of the supply of food fishes--the U.S. Commission of Fish and Fisheries, in addition to direct efforts to increase the abundance of fishes naturally inhabiting our various rivers, lakes, and coast waters, has given considerable attention to the experimental introduction of fishes into regions or streams to which they were not native.

The wonderful success which has followed the planting of shad and striped bass fry in the waters of the Pacific coast is well known. The results attending the recent attempts of the Commission to establish a run of salmon (_Salmo salar_) in some of the large rivers of the Atlantic coast have been so noteworthy in the case of the Hudson as to afford reasonable ground for expecting the early inauguration of a regular fishery, should the present rate of increase in the abundance of the fish be maintained. Similar striking results may also be anticipated in all the more northern streams of the east coast, including the Housatonic, Connecticut, and Merrimac, in which salmon were at one time found in abundance and are now taken in small numbers, if the ascent of the adult fish to the headwaters for the purpose of spawning is permitted and if sufficiently extensive fish-cultural operations are continued.

The primary purpose of this paper is to record some of the apparent results of salmon propagation in our rivers as shown by the occurrence of the fish at points on the coast or at sea more or less remote from the places where fry have been deposited.

While an interesting and instructive compilation might be made of the instances of the capture of salmon in the Hudson, Delaware, Susquehanna, Potomac, and other rivers in which the fish has been acclimated, such a work is not necessary in view of the notice which has already been accorded the matter in the public press and in the reports of several of the State fish commissions, notably the New York commission.

So much yet remains to be learned regarding the lines of migration of the salmon to and from the rivers, its winter habitat, the existence of an "instinct of nativity" which is supposed to impel the return of the fish to the place where hatched, the extent of the coastwise distribution of salmon originally belonging in a given river, and numerous other practical and scientific questions, that the presentation of any data bearing on the occurrence of the fish outside of the rivers may be regarded as acceptable and timely.

In an interesting article on "Salmon at Sea," communicated to the issue of _Forest and Stream_ for February 18, 1892, Mr. A. N. Cheney, the well-known angling expert and writer on fish-cultural matters, discusses the question of the whereabouts of salmon after they leave the rivers, and quotes the following from a previous contribution by himself on the subject:

"There is a certain mystery about the habits and movements of the sea salmon, after it has left the fresh-water rivers in which it spawns and gone down to the sea, that never has been satisfactorily explained. One theory is that all the salmon of the rivers along a coast may journey down to the sea, and then move ultimately in one great body southward along the coast until they find water of suitable temperature, with an abundance of food, in which to spend their time in growing fat until the spawning instinct warns them to return, when they proceed northward, each river school entering its own particular river as the main school arrives opposite the river month.

"Another theory is that the salmon of each river, as they arrive at its mouth after descending from its headwaters, go out to sea sufficiently far to find the conditions of temperature and food which suit them, and there they remain, separate from the salmon of other rivers, until it is time for them to return to fresh water. Considering the certainty with which the salmon of any particular river return again to the stream of their birth, the latter theory seems the more tenable of the two."

Another object of this paper is to solicit correspondence from fishermen, especially those engaged in the coast and offshore fisheries, concerning the circumstances of the capture of salmon in their nets, and to bring to their attention the opportunity they will thus have of increasing the knowledge of the movements of the salmon, of aiding in the determination of the results of fishcultural operations, and of ultimately if not immediately benefiting themselves by supplying information that will conduce to the most effective application of artificial methods.

To this end it is the intention to send the paper to fishermen engaged in the mackerel, menhaden, and other sea fisheries, and to operators of pound nets, traps, and other shore appliances, with the hope that instances of the capture of salmon may be communicated to this Commission and notes on the size, condition, movements, etc., of the fish be furnished.

To aid in the identification of the salmon when caught by fishermen who have not previously met with the fish, a figure is presented.

In this connection mention may be made of the chinook or quinnat salmon of the Pacific coast (_Oncorhynchus chouicha_), fry of which have been extensively planted in eastern waters by the U. S. Commission of Fish and Fisheries. Up to and including the year 1880, about 12,000,000 fry were deposited in rivers and other waters tributary to the Atlantic. While a few relatively large examples have been taken, this office has no information to show that the attempts to acclimate this species on the Atlantic coast have as yet been successful. In 1891 a few thousand yearling salmon were placed in New York waters tributary to the sea. The possibility of the survival and growth of some of these and of the large early colonies prompts this reference to the matter and suggests the publication of the accompanying figure of the species, to afford a basis for distinguishing the two kinds of salmon, which closely resemble each other. To further aid in the identification of the two species the following key has been prepared:

Rays in anal fin, 9; scales between gill opening and base of tail, 120; branchiostegals (false gill openings), 11 ..........ATLANTIC SALMON.

Rays in anal fin, 16; scales between gill opening and base of tail, 150; branchiostegals, (false gill openings) 15 to 19..........PACIFIC SALMON.

Numerous instances might be cited of the taking of salmon in the waters of the Atlantic coast in recent years. Their occurrence in the traps and pound nets is in fact so common that it would hardly be entitled to notice at this time were it not for the circumstance that in regions in which salmon were already known there has been a decided increase in the number observed outside the rivers, and that the fish is now being taken in localities in which it was not previously found.

Instances of the capture of salmon in the coast waters of Maine are naturally numerous, and without significance so far as the purposes of the present paper are concerned. The existence of two important salmon rivers, the Kennebec and the Penobscot, affords an easy explanation of the presence of salmon on the shores of either side of the mouths of those streams. In the report of the U. S. Commission of Fish and Fisheries for 1873-73 Mr. Charles G. Atkins, now superintendent of the salmon-rearing establishment at East Orland, Me., and an authoritative writer on the Atlantic salmon, contributes some notes on its occurrence in the sea adjacent to Penobscot Bay and at Richmond Island, near Portland. These cases, however, have little bearing on the subject in hand, as Mr. Atkins suggests in a recent letter.

A special inquiry, personally conducted on Matinicus, Monhegan, and other islands lying far off the Maine coast, and special researches there made with appropriate apparatus, would doubtless disclose many interesting facts regarding the salmon of a practical and scientific nature. A few apparently unrecorded notes concerning the fish among islands off the island of Mount Desert may be given, which are probably indicative of what may be expected in other sections.

Mr. W. I. Mayo, who has fished herring brush-weirs at the Cranberry Isles for many years, and is a life-long fisherman in that section, communicates the intelligence that salmon were first observed about those islands in 1888. On June 17 a salmon, weighing 20 pounds, was taken in a herring weir, and on June 19 another, weighing 19 pounds, was caught. On July 14 of the same year 6 salmon, weighing 4 to 6 pounds apiece, were secured, but were liberated on account of their size. During the four years intervening between 1888 and 1893 none was taken around these islands, but in June of the latter year they reappeared. On June 11 a salmon weighing 15 pounds was taken in a weir, and on various occasions during that month a number weighing 12 to 15 pounds each were caught by boat fishermen on trawl lines fished for cod.

The trawls were baited with herring and set on the bottom in rather deep water. Mr. Mayo states that these were the first salmon ever taken on trawl lines in that region. The Cranberry Isles lie off the southeastern part of Mount Desert Island, and are about 25 miles east from Penobscot Bay and about 35 miles in a straight line from the mouth of the Penobscot River.

On the Massachusetts coast salmon are now regularly taken each year at most of the important pound-net and trap fisheries. The largest numbers are caught in Cape Cod Bay. A State law prohibits the taking of salmon in nets and requires the return to the water alive of all fish so caught. This makes the fishermen diffident about giving information and renders difficult the determination of the abundance of the fish. On June 6, 1879 the _Cape Ann Advertiser_, of Gloucester, contained the following note:

"A 10-pound salmon was taken from a weir off Magnolia Thursday night. This is the first salmon caught off Cape Ann for over thirty years. On Saturday morning three more large salmon were taken. The fishermen are highly elated at the prospect of salmon-catching."

During the past five or six years a few salmon have been taken almost every season in the vicinity of Gloucester, the average annual catch being 4 to 6 fish. In 1888 the State fish commissioners reported the capture of 18 salmon in traps at Manchester and Gloucester. In 1893, 13 traps in the neighborhood of Gloucester took 5 salmon.

In December, 1891, a salmon weighing 28 pounds was caught on a cod trawl line set near Halfway Rock, off Salem Harbor, Mass.; Mr. William Dennett, of Gloucester, who secured the fish, reports that he sold it for $46. Mr. Samuel Wiley, of Gloucester, in September 1893, caught a salmon at sea off Gloucester on a trawl line fished for hake. These are the only instances that have been reported of the capture of salmon on a hook in the vicinity of Gloucester. As the trawl lines in question were set on the bottom at a depth of 20 or 25 fathoms, the fact that these two fish at least were swimming on the bottom may be considered established.

Relatively large numbers of salmon have recently been taken in the pound nets of Cape Cod Bay. Capt. Atkins Hughes, of North Truro, one of the best-informed and most reliable fishermen in the region, informs us that at North Truro, the principal pound-net center in the bay, about 70 large salmon have been annually caught for two or three years. The fish are taken throughout the entire pound-net season, but are most common in the early part of the fishing year (May and June). Some fish weighing 25 to 28 pounds have recently been caught. For two or three years he has noticed in the pound nets in October large numbers of young salmon, about 6 inches long; each net probably takes one or two barrels of these annually; he had never observed these small fish before in his long fishing career in that region. In 1893, however, rather less than the usual number of large salmon were observed, and very few of the small fish mentioned were taken.

Mr. Vinal N. Edwards, of the Fish Commission station at Woods Holl, Mass., states that in September, 1892, when he visited the Cape Cod region, a great many salmon were being taken in the pound nets. They weighed 4 or 5 pounds apiece. At one pound-net fishery in Provincetown he saw enough salmon to fill two sugar barrels.

Concerning the occurrence of salmon in the Cape Cod region, Mr. Cheney, in the article previously mentioned, quotes Hon. Eugene G. Blackford, of New York, as follows:

"We get every winter a few fish from the Atlantic coast that are evidently part of the schools of fish that run up into the Kennebec, Penobscot, and other eastern rivers. During November and December we had about 15 to 20 fish, weighing from 12 to 24 pounds each, that were caught in the mackerel nets in the vicinity of Provincetown and North Truro, Mass. These nets are set out from the Cape in very deep water.

"During the past two or three weeks we have received several specimens of very handsome salmon from Maine, where they have been caught by the smelt fishermen in their nets when they have been fishing for smelt. I think these catches of salmon go very far to prove that the schools of fish are not very far off from our shores during the time that they are not found in the rivers, and that both shad and salmon, when they leave our rivers, do not go either east or south, but are within 100 miles or so of the rivers where they were spawned. The fish are remarkable in being in splendid condition and perfect in form and appearance."

Mr. Cheney thinks the salmon taken off Cape Cod belong in either the Merrimac River or the Penobscot River; and, as in the year in question fish were being caught at the mouth of the Penobscot at the same time they were being taken at Cape Cod, he thinks it probable that the fish in the latter region were from the Merrimac.

In the pound-net fishery of the northern coast of New Jersey the recent capture of salmon has been a subject of much interest to the local fishermen and of considerable importance to fish-culturists and naturalists.

For a number of years a few salmon have, from time to time, been taken in Sandy Hook Bay, but within the past two or three years there has been an increase in the number caught. At Belford, the principal fishing center in the bay, Mr. M. C. Lohsen states that some have been taken weighing from 12 to 40 pounds, and that in the spring of 1893 more than the usual number were caught in the pound nets. Mr. Harry White, of the same place, never took salmon in pound nets prior to 1891; he secured 1 that year and 2 in 1892, but failed to get any in 1893. Other fishermen, however, obtained one or two fish. The average weight of the salmon taken here is 12 to 15 pounds; the largest caught by Mr. White weighed 17 and one half pounds. Small ones, weighing half a pound each, are sometimes observed. It is only during the month of May that salmon are noticed on this shore. One weighing 16 pounds, taken in a pound net at this place in 1891, sold for $11; the following year two, with a combined weight of 23 pounds, sold for $15.95.

In the vicinity of Long Branch, we are informed of the recent capture of a number of salmon in the pound nets set directly in the ocean. Mr. Ed. Hennessey, of North Long Branch, reports that in 1892 two salmon and in 1893 one salmon were taken in his pound; they weighed from 10 to 15 pounds each. In April, 1891, Messrs. Gaskins and Hennessey, of the same place, secured a salmon in their pound; this was the only one they ever took. Messrs. W. T. Van Dyke & Co., pound-net fishermen of Long Branch, communicate the following instances of the taking of salmon by them in 1893: May 10, 1 salmon weighing 9 1/2 pounds; May 11, 1 salmon weighing 13 1/2 pounds; May 17, 1 salmon, and May 18, 1 salmon, weight not given. Messrs. West and Jeffrey, pound-net fishermen at Long Branch, report that in 1892 they caught 2 small salmon.

In 1893, 3 fish were taken, as follows: May 10, a salmon weighing 19 pounds; May 18, 1 weighing 12 pounds; May 20, 1 weighing 10 pounds. Mr. Henry F. Harvey, who fishes a pound net at Mantoloking, N. J., about 35 miles south of Sandy Hook, communicates the information that in May, 1893, 2 salmon weighing 10 or 12 pounds each were taken at that place. None had ever before been caught there.

One of the most interesting facts at hand concerning the oceanic occurrence of the salmon has been noted in a previous paper in this Bulletin, (*) but may be again referred to in order to make the present article more complete. Instances of the capture or observation of salmon far out at sea or even at relatively short distances from land are very rare and are entitled to publication whenever noted.

About April 10, 1893 the mackerel schooner _Ethel B. Jacobs_, of Gloucester, Mass., was cruising for mackerel off the coast of Delaware. When in latitude 38 degrees, at a point about 50 miles ESE. of Fenwick Island light-ship, the vessel fell in at night with a large body of mackerel, and the seine was thrown round a part of the school. Among the mackerel taken was an Atlantic salmon weighing 16 pounds, which Capt. Solomon Jacobs, who was in command of the schooner, sent home to Gloucester. Capt. Jacobs informs us that the fish was fat and in fine condition. Some of the crew told the captain that there was another salmon in the seine, but it escaped over the cork line as the seine was being "dried in." The light-ship mentioned is about 10 miles off the coast, so the place where these salmon were taken was about 60 miles from the nearest land.

The foregoing is the only instance known to this Commission of the capture of salmon so far at sea on the coast of the United States or of the taking of salmon in a purse seine with mackerel under any circumstances. Capt. S. J. Martin, the veteran fisherman of Gloucester, Mass., has never known of another such occurrence, and a special inquiry conducted by him among the mackerel fishermen of that port failed to disclose the knowledge among them of a similar case.

Footnote: * Extension of the Recorded Range of Certain Marine and Freshwater Fishes of the Atlantic Coast of the United States.