Mammals of Washington, Volume 2: University of Kansas Publications Museum of Natural HistoryDalquest, Walter Woelber
Science
Mammals of Washington, Volume 2: University of Kansas Publications Museum of Natural History
Dalquest, Walter Woelber
Mammals -- Washington (State)
Fish of many species were abundant in these waters. Salmon were often
seen leaping near the playing otters. Yet no scales or other remains of
fish were detected in the feces. Candlefish possess tiny scales that
could probably be seen by microscopic examination only. As for the
bird remains, the quantity of feathers consumed is notable. The otters
apparently do not pluck birds, as do minks. Indeed, of the material
eaten, the food value by volume seems extraordinarily low. A great
quantity must be eaten to nourish an animal as large and as active as
an otter. The number of fecal droppings seen each morning indicates
that this is the case.
[Illustration: FIG. 62. River otter (_Lutra canadensis pacifica_),
trapped in Columbia National Forest, Washington, February, 1937.
(Adolph Roth photo.)] seems extraordinarily low. A great quantity
must be eaten to nourish an animal as large and as active as an
otter. The number of fecal droppings seen each morning indicates
that this is the case.
The favored food of the otter in fresh water streams and lakes is the
crayfish. The greater part, perhaps 80 per cent, of otter feces seen in
the lowlands of western Washington, were composed of crayfish remains.
Some fish are also eaten and locally otters may do damage among the
steelhead trout. Even worse, from the fisherman's standpoint, they
frighten and scatter the schools of steelhead trout. Frogs are eaten, as
well as the thin-shelled mussels. The feathers of coots were twice seen
in otter feces near Cottage Lake, King County.
The fur of the otter is dense and beautiful but the skin is rather
heavy. Changes in styles cause great fluctuation in the value of the
otter's pelt.
[Illustration: FIG. 63. Distribution of the river otter in Washington.
Unshaded _Lutra canadensis pacifica_. Shaded _Lutra canadensis
vancouverensis_.]
=Lutra canadensis pacifica= Rhoads
_Lutra hudsonica pacifica_ Rhoads, Trans. Amer. Philos. Soc., n.
s., 19: 429, September, 1898.
_Lutra canadensis pacifica_ Allen, Bull. Amer. Mus. Nat. Hist.,
10: 460, November 10, 1898.
_Type._--Obtained at Lake Keechelus, Kittitas County, Washington
(altitude 3,000, rather than 8,000 feet as stated in original
citation); type in Academy of Natural Sciences of Philadelphia.
_Measurements._--An adult male from the Lower Calawah River, near
Forks, Clallam County, measured (skinned carcass): total length
1205; length of tail 490; weight (entire) 23 pounds. A male from
Puget Island, Wahkiakum County, measured (skinned carcass): total
length 1250; length of tail 490. A female from Satsop, Grays
Harbor County, measured (skinned carcass): total length 1205;
length of tail 440. A female from Calawah River near Forks,
Clallam County, measured: total length 1062; length of tail 430;
hind foot 120; ear 23; weight 14-3/4 pounds.
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