Weekly national intelligencer. [volume] (Washington [D.C.]) 1841-1869, 1852-10-02

10,
in fact have been satisfactorily solved and now in
order to render the country important services they only
want the funds necessary TO enable them extend their
operations have come to this conclusion not only from
view Of the results already obtained by NM Gehn and
Remy but also of the facts similar in kind which have
collected in England, where analogous attempts upon
large scale are being made Of late years excite much
interest
In fact, M Boecius civil engineer at Hammersmith
has resorted TO the process of artificial formulation for
restocking several rivers Of Great Britain and he appears
to have succeeded perfectly In l84l he operated upon
the watercourses the property Of Mr. Druinmond
uxb1dge and he estimates at 40 600 the number Of
routs which he has reared there In subsequent years
ne practsed similar operations the magnificent estate
Duke of Chatsworth and ut
Carsalton for Mr. Quincy and after wards Mt Chaor for
Mr. Hbberts Finally, the Anglers Club at Great Answell
In the county Of HEREFORD employed Mr. Boccus to pre-
pare for them important fishery and that gentleman
me that he has already there the
least calculation, two millions of small trouts He has
published book upon this method of propagatng fish
1t seems that society is about being formed under the
patronage of Mr. Labouchere for the purpose stocking
the Thames with salmon by this system
The employed by NM Gehin and Reny is Of very
simple and easy execution 1t hardly differs at all from
that adopted by Mr. Boccius and is almost exactly that
described by jacob nearly century ago.
1t is in November the beginning of December that the
reproduction OF trouts takes place To obtain the eggs
intended for artificial formulation, it suices to press
shghty from the front towards the rear when the
ment for spawning has arrived the abdomen Of the female
Of water and upon them should be poured the mlt or
soft roe obtained in exactly similar manner by press
ing it from the abdomen of the male fish into another
sci OF water these products have not arrived at
urty when this operation attempted they will not ow
out except under the application of strong pressure In
cases the fish should be kept days longer be-
fore operating this sort of forced accouchem for ne
Their the eggs the sperm be probably used in
state of mmaturty and the lives Of the parent fishes
would be endangered by any violent procedures. Imme
datey upon contact with the water into which the sperm
has been eected the change color Prior ecunda
ton they are transparent and of yell0wsh color As
soon they formulated they become whitish or r
ther opane trout of the age of two years only and
weighing about l25 grammes, 40 avoirdupois
mny furnish say 600 eggs; trout of three years from
100 to 500 eggs 1t is to be remarked that the m Of
male suhces to fecundate the eggs supplied by half
dozen, or even greater number of females.
NM Gehin and Remy place the eggs thus formulated
bed OF gravel in tin boxes pierced with holes These
six inches broad and three inches Deep and
can contain about thousand eggs each. They are
placed in some little whose waters are quick and
clear but not deep They partially inferred in the
bed OF the stream and arranged that the current will
be perpeuay renewing the which battles the eggs
for the agitation of the is necessary only
sure the respiration of the embryos but also prevent
the formation OF the byssus hair-weed, (eonrges
which would rapidly appear and determine the death of
the il the water allowed become stagnant
The development of these embryos lasts about four months
and it is generally about the end Of March or April
that the exclusion or Matching takes place During the
SIX hrst weeks the young routs bear under the belly the
umblical vtelne yesice which contains the remains
of the nutrve substance analogous the yok of the
eggs of BIRDS and is at first by the consumption of this
substance that the fry is nourshed But when the alb
sopon of this is completed the little fish requires other
ailments and he must then be made quit the box which
has served his cradle and allowed swim about freely
in the stream pond which it is intended stock. FL
naly, in order to supply these little animals with
abundant ament suited to their wants. it suices al
low to remain TO introduce into the stream pond
where the fish are placed number Of frogs The spawn
of these batrachans is food which the fish seek with
ayidlty and the tadpoles constitute also excellent ali
ment for the trouts of advanced age When the
small tous which have been bred in this way destined
to be used for stocking river they should be placed in
the brooks or small streams tributary to the river and
those streams should be selected in preference which flow
rapidly and noisily pebbly rocky bed In pro-
PORTION the fish grow they descend spontaneously to
deeper waters, but do reach them till they su-
cienty active to escape by fight from the enemies they
meet there. We're they placed Immediately in the midst
of other yoracious fish very few would escape destruction
When ii is in ponds nurseries that It's proposed
the fish, must be taken separate totally the pro-
ducts of each year, for the big trouts deyour the little
and prevent this it is necessary keep together
in the same enclosure all that of the age To
get up therefore, in regular style enterprise Of this
sort should have least three ponds from which the
fish should be gathered alternately three years
lively after each has been stocked and generations
placed in the pond just vacated. Unfortunately, NM
Genin and Kenny have not the TO carry upon
this sufficient scale the execution Of their They
have leased small pond which they use in this way
and have purchased another for 800 f S150 j but
their pecuniary resources exhausted and if
der your benevolent protection NJ. lie Minstre they do
not obtain some assistance from Government fear that
1t will be impossible for them complete experiments of
which the commencement is Of the most satisfactory
character
The efforts of NM Gehin and Remy appear to me
the more worthy of encouragement from the considera-
ton that will bring little or pecuniary profit
to these sefsacrifcing and enterprising men, yet win
augment the alimenary resources Of the population
the rivers Ii only by considering those operations for
stocking rivers with fish in the light Of works OF public
utility, and by executing them at the public expense
that we may hope to give real Importance our river
fisheries But we appropriate to this object even very
small sums, may obtain have doubt whatever re-
suits Of Importance to the country
| Ii the processes employed by NM. Gehin and Remy
were applicable only to trouts and other species
yielding but small product, should not attach to the
subject the lively interest do But il may be employed
for the breeding Of salmon And am convinced that by
these means il would be easy to our streams Of
Brittany the chthyologic wealth which is gradually fail
ing in them; and to acclmatize the salmon in rivers
which hitherto have been little at all frequented by
this fish, Nothing Is easier than the transportation of
eggs newly fecundaed Of the live salmon whose abdo
men Is charged with the eggs with the milt And
even the parent fish should die upon the road the fe
cundaton and the development of their eggs could still
be effected On placing the eggs thus artfcialy fecun
dated in brooks judciousy chosen, the young salmon
would grow just as in the places which the parent fish
would have selected for spawning they would emigrate
as usual toward the sea, and after grown to maturity in
the depths Of the ocean they would experience the
Of spawning In their turn, and would not fail TO return in
great numbers to the river from which they issued They
would ascend the stream, and seek there suitable place
from the former experiments Of Deslandes in Brittany
and from observations Of the nature repeated In
own day in Scotland by the Duke Of Athol Sir w
Jardine, Mr.. Bagrie, Mr. Haysham, and Mr. Young