New England Salmon Hatcheries and Salmon Fisheries in the Late 19th Century — John Shaqi
New England Salmon Hatcheries and Salmon Fisheries in the Late 19th CenturyVarious
History
New England Salmon Hatcheries and Salmon Fisheries in the Late 19th Century
Various
Fish hatcheries -- New England; Fisheries -- New England; Salmon -- New England
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.
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account