ZOOLOGICAL SOCIETY BULLETIN 
133 
ROCK BASS AT THE AQUARIUM 
Photograph by Elwin R. Sanborn 
makes its nest in shallow water along shore, 
like basses and sunfishes generally. The fishes 
are sociable at this time and nests are often 
found in groups close together. C. H. T. 
RECENT ACTIVITIES OF THE WELL- 
BOAT SEAHORSE 
By C. M. Breder, Jr. 
HE first trip this year, was taken for the 
purpose of distribution, rather than for 
that of collection; that is the initial voyage 
was made to Palisades Interstate Park, with a 
cargo of fry and fingerlings to be planted in 
its waters. The shipment included over 3,000 
rainbow trout, 7,000 lake trout and 2,000 
chinook salmon. The first and second men¬ 
tioned species seem to have a fair chance of 
survival and it is to be hoped that they or their 
progeny will afford objectives for anglers in 
the futuie. The chinook salmon planting was, 
however, more in the nature of an experiment 
as these Pacific Coast fish are extremely diffi¬ 
cult to establish in eastern waters. This assort¬ 
ment of some 12,000 young fishes was carried 
on deck in tubs under experimental conditions. 
Instead of the usual method of aerating the 
water by means of a tin dipper, oxygen under 
pressure was supplied from such tanks as are 
used in connection with surgical work. A rubber 
hose connected these containers with liberators 
made of soft carbon tubes which were immersed 
in the tanks holding the fish. As this form of 
carbon is a porous substance these tubes allowed 
the compressed oxygen to escape only in very 
minute bubbles which, of course, made their 
solubility much greater owing to the large 
amount of surface they exposed to the water, 
in the aggregate. Patent rights are held on this 
device by the inventor who requested that we 
try his apparatus and so far as we could judge 
from this trial it was quite successful, the fish 
arriving in what appeared to be excellent con¬ 
dition although, naturally, it was impossible to 
study the behavior of the released fish to note 
if any after effect ensued. A control of 350 
chinook salmon was also carried in which the 
aeration was affected by the usual dipper method 
and as these fish likewise sustained no losses, 
no great advantage could be seen. However, a 
saving in labor and necessary attention was 
noteworthy. On the return trip there were 
brought back some indigenous fishes from the 
park under similar conditions with nearly the 
