4;2
THE. —BÏÔEOGY ;OF FISHÈSJÏ
*
so pay,no
It is not
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terrain Whether thermales follow and attend on the females,
but-they pass over the same ground as theyShed the milt, and
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it appears that both ;sexesmay partake of the eggs around
them.—_ Freshwater shes like the Salmon and Trout go
through a similar- but more elaborate performance. The
choiceof ground is Very carefully made, the sand and grave]
hollowed out and the male .guards the bed from other.rnales
andintruders._ With=the deposition and fertilisation of the
.
__eggs,;
of the parents end.
But in some
theparents cover over the eggs With sand and
stones.
_
__
_
_
,
:
‘:‘_ Parental care
is most;eæzident among the sedentary
_shès—perhaps asthe
more sluggish meta—
bolism and
are shed in a crevice
of the rocks, under shellè or1nhollows made in the_ground,
and then the :male, seldomthefemale, broO-ds overthem and
guards them as Well as it canaga1nst enem1esThen some
bIllld neSts:o£_
tlië"ïàlea
.
,
In ane '."kind; gihè:
_is_—:eare£ully
together'îi by
'
kidneys, andthemale —;the‘n 1nv1tesor entices or—1f his
favourably received—drives a»female to
lay, her eggs Within. If she est:apeS throughthe other side,
as the-female Stickleback sometimes __;does,=
“pr—several more until.he hàs= obtamdhlsquota‘thenhe
*
Matmgofthesexesoccursmmanycasesandres‘ults -ifn'
,
_
-
'SÔiÏI€Èil}“iËhëiçéggË"èiùàfÿläîä;aftertheyhaVebeen ffer-tilised,
Î
thewhole
and eVeh_ larval
.
deve10pmentlspassedthroughmthmthefemale
fert1hsatmn13 the TUÏ€, With = OIY= Gneexception
0:
And
;
shes' jor. Teleosts have acquired the game
_.
habltaW€may
The probable
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.
.
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