The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1890-12-08

To XIII the Parasites tho Psiicans must
Be Differentiated.

10 hfil the Parasites tho fobe"
Be Differentiated.
From Secretary Mobiles Report.
As-s wal known. acme Of the trout In the
Yellowstone Park are fnfesfed with worms.
very suggestive letter to the superintendent,
Captain Boutelie, u. g. A., has BEEN written on
the subject by Prof Edwin Linton, WAC visited
thees " tiers in connection with Psoi. ?. a
Forbes during the psst summer. Professor LIN.
ton makes the suggestion, 20 which, however,
he ooes not commit himself entirely. but the
secretary begs leave 10 present il ~ very IN
teresting subject OF investigation and specuia-
ton. II 10 that the Iarya infesting the lake
trout f. non-sexual, and corresponds 70 the
parasitical a. imai in the common pork tape
worm, aud - tie sexualiy mature animals OF
the same genus ~ the larvs found In the nost
in,est also che rroHteating pelican which re-
quens the AXE, the animai would die IN the
nsh II it wers not allowed TO mature in the bird
In the language of the professor, this iarva
corresponds to-
the 'meas.es' of pork in the life Of the COM
mon pork tape-worp, which reaches us aaait
condition Ia man Tae parsite OF trout -
longs to the order OF worms that needs TWO ait
feient animals In which 70 complete the cycle
OF life Ny search, after making some furtner
examination OF the trout themselves, WAS
the efore, for some animal that eats the trout
uncooksd, and In which could find worm IN
the intestine. sexusLy mature. when would
correspond with the immature form IN tne
trout. have examined some OF the hsh-eafing
bi Dis that occur on Yellowstone lake, ana nnd
good evidence that the pelican 10 the ma nost
Of tn. parasite which infests the trout. Snail
need 10 maze . more careful examination OF the
material have coll.ctsd than is possible Win
my present appliances, before can puDlisn IL
- Certain that this the true state OF the case
Il may say. however. that / have found an
intestinal parasite, sexuaily mature, with eggs.
In the pelican, which belongs 70 the same gc-u
AZ the immature form occurring In the trout
Furthermore. cola ersl evidence alone makes
out very strong case against that bird found
that the stom achs OF the tour pelicans exam
lined contained partly digested remains OF hsh,
evidently average-kized trout from the lake.
The peLcans were shot on Molly island, In the
soathw west finger Of the lake, where they have
breeding place and resort in large numbers
Tho pelican Ia the only hsn-esting bird have
seen In any numbers on the lake. am in-
formed that IL eats 6sh that nave been left on
the shores Of the lake. The parasites occur in
the same fish often OF very different sizes. from
. small cyst no larger than q smail-sizsd shot,
70 lsrva in the muscular tissue . foot n
length"
Ger ainly very strong established scientific
data viii have 10 be found before the bird Is de-
stroyed to save the fish, and, after all, IL may be
a. difficult mater to exterminste the pelican.
with his wide range of breeding county out
side the lake, ~ IL would be 70 annihilste the
fish, II IL understood the worm la iest<d front
10 confined to . very limited and well-defned
region of the wa'esa