THE ARTIFICIAL PROPAGATION OF MARINE FISH
21
through metamorphosis in a glass carboy holding 46 1. sea water,
during the 1896 8ea8on at Dunbar. He introduced about 1200 newlyhatched fry and fed them on plankton collected by tow-net from the
harbour, Dannevig's amount contains no reference to final numbers
of young plaice or percentage survival. He attached much importance
to the observation that convection currents, caused by differences in
waterlair temperature, kept the early larvae in gentle motion.
Garstang (1900) described experiments at Plymouth, in which
Bknnius oce~!hris L. was reared from eggs found attached to old
Bwinum shells dredged from moderately deep offshore water. He
concluded that mechanical agitation w m necessary to wtivate Blenniua
FIG. 3. "he Fabre-Dornergue marine fieh-rearing apparatus. (After Fabre-Domergue
end BiBtrix, 1905.)
larvae and to stimulate feeding, also a liberal supply of pure sea water
and suitable food offered each day in frequent small doees. An empirical
stress on the desirability of water agitation often appears in the old
literature, although its importance in rearing work has never been
proved conclusively.
At Concctmeau, Fabre-Domergue and Bietrix (1902, 1906) modified
the " plunger-jar " principle of Browne (1898), in their successful
attempt to rear Solea solea (L.) from sea-spawned eggs, through and
beyond metamorphosis. The French naturalists used a helical die0
gently rotated on & vertical axis to agitate occa8ion&lly-renewed 8e8
water in a 60-1. barrel-shaped glass container (Fig. 3). They fed the
newlyhatched larvw of the sole on a flagellate culture, and, at a later
Stage of development, on plankton collectd from neighbouring rock
pools.
Anthony (1910), at St. Vaast-la-Hougue, worked on turbot
21
through metamorphosis in a glass carboy holding 46 1. sea water,
during the 1896 8ea8on at Dunbar. He introduced about 1200 newlyhatched fry and fed them on plankton collected by tow-net from the
harbour, Dannevig's amount contains no reference to final numbers
of young plaice or percentage survival. He attached much importance
to the observation that convection currents, caused by differences in
waterlair temperature, kept the early larvae in gentle motion.
Garstang (1900) described experiments at Plymouth, in which
Bknnius oce~!hris L. was reared from eggs found attached to old
Bwinum shells dredged from moderately deep offshore water. He
concluded that mechanical agitation w m necessary to wtivate Blenniua
FIG. 3. "he Fabre-Dornergue marine fieh-rearing apparatus. (After Fabre-Domergue
end BiBtrix, 1905.)
larvae and to stimulate feeding, also a liberal supply of pure sea water
and suitable food offered each day in frequent small doees. An empirical
stress on the desirability of water agitation often appears in the old
literature, although its importance in rearing work has never been
proved conclusively.
At Concctmeau, Fabre-Domergue and Bietrix (1902, 1906) modified
the " plunger-jar " principle of Browne (1898), in their successful
attempt to rear Solea solea (L.) from sea-spawned eggs, through and
beyond metamorphosis. The French naturalists used a helical die0
gently rotated on & vertical axis to agitate occa8ion&lly-renewed 8e8
water in a 60-1. barrel-shaped glass container (Fig. 3). They fed the
newlyhatched larvw of the sole on a flagellate culture, and, at a later
Stage of development, on plankton collectd from neighbouring rock
pools.
Anthony (1910), at St. Vaast-la-Hougue, worked on turbot