tes several opinions
expressed before the Select Committee, one of which is, that
Salmon enter and leave rivers for other purposes than those
connected with spawning (see the evidence of Messrs. Little,
Halliday, and Johnstone).

First, "That they enter rivers to rid themselves of sea lice
(_Monoculus piscinus_);" secondly, "That they forsake rivers to
save themselves from being exhausted by residence in fresh water,
and from having their gills devoured by a maggot (_Lernaea
salmonea_)." The whole history of the Salmon contradicts this
hypothesis. Another of these errors is, that it is asserted (Rep.,
1824, p. 145), "That Salmon always return to the same river;" this
is not probable, when we consider the circumstances in which they
are placed during their residence in the sea. On the first of
these opinions, I am not a competent judge; but I think that the
fact that Salmon enter rivers nine or ten months before they are
ready to spawn, is of itself sufficient to show that there are
other reasons for their entering rivers than those connected with
propagation. With respect to the second, I believe that after
Salmon have once entered rivers, at least when they have ascended
into the upper parts of them, they never offer to descend again
until they have spawned. On the third opinion I would remark, that
although I do not think that Salmon always come to the same river
in which they were bred, yet I think they will do so if they can;
and I think that the fact which I have mentioned of the Hodder, a
smaller and a tributary stream to the Ribble, containing many more
Salmon, as well as more Morts and Sprods, countenances this
supposition, for why should the larger number of fish ascend the
smaller river except for such a reason?

I am of opinion that Salmon do not grow so fast in the sea as is
generally supposed. It is here generally believed that the Smolts,
which go down in the spring, come up again in the August or
September following, five or six pounds in weight; and George
Little, Esq., in his evidence states that as his opinion, but he
does not give any other reason for it than this: "That the Grilse
that ascend the river in June weigh one and a half or two pounds,
and that those which come in September weigh five or six pounds,"
--but opposed to this supposition is the evidence of Mr. Mackenzie,
before referred to (second Parl. Report, p. 21), who states that
he caught in March a Grilse Kelt which weighed three and