582 U. S. BUREAU OF FISHERIES 
132,219,000 fry, 3,684,000 eyed eggs, and 2,923,000 green eggs were 
planted. As the planting of flounder fry in Long Island Sound and 
Narragansett Bay has produced good results, a portion of the produc- 
tion was liberated in those waters. Most of the remainder was 
planted in the coastal waters of Massachusetts, and a limited number 
were assigned to the Rhode Island Fish and Game Commission. 
From commercial fishermen 9,102,000 mackerel eggs were obtained 
which produced 8,277,000 fry for liberation in Vineyard Sound and 
Buzzards Bay. 
GREAT LAKES SPECIES 
The role of hatcheries in maintaining the supply of commercial 
species in the Great Lakes is a highly debatable issue. Commercial 
fishermen generally advocate more hatchery activities, although their 
cooperation in supplying eggs is not fully satisfactory. It is pointed 
out, in opposition, that the decline in abundance of whitefish, lake 
trout, and lake herring continued during the years when hatchery 
activities were at their peak. There has been no clear determination 
of the relative efficiency of natural versus artificial reproduction in 
this field. It is clear, however, that the salvaging of mature eggs 
from fish caught during the open fishing season is a contribution to the 
industry, and the hatcheries operate on this basis. Also, there is 
evidence that the rearing of lake trout to fingerling size before planting, 
as . done at the Charlevoix (Mich.) station, will give more positive 
results. 
Due to the fact that waters in which the Duluth (Minn.) station 
collects lake-trout and whitefish eggs were closed to fishing during the 
spawning season of both species, the take of these eggs was light. 
About 801,200 green lake-trout eggs were collected, 7,404,800 eyed 
eges were received from the Michigan Department of Conservation, 
and 400,000 eyed eggs were obtained by transfer. The whitefish eggs 
taken were of poor quality and the hatch was only about 50 percent 
of normal. An effort was made to persuade the herring fishermen to 
take eggs from their catches, but little cooperation was secured. 
Pikeperch eggs were collected in cooperation with the Forest Service, 
and although the take was normal the quality of the eggs was slightly 
lower than for previous years. The majority of the fry were dis- 
tributed in the waters of Superior National Forest. During these 
operations 230,000 northern-pickerel eggs were taken for experimental 
incubation and approximately 87 percent hatched, which demonstrates 
that this species can be successfully propagated artificially. Brook-, 
brown-, and rainbow-trout eggs were received by transfer and hatched 
for general distribution and for stocking the Cascade rearing ponds in 
Superior National Forest. 
The Cape Vincent (N. Y.) station, due to a lack of funds and, poor 
fishing weather during the height of the spawning season for lake 
trout, was able to secure only 278,000 eggs. When eyed, 234,500 of 
these eggs were shipped to Peru for the stocking of Lake Titicaca. 
A shipment of 300,000 lake-trout eggs was received by transfer from 
Duluth, Minn., to replace those sent to Peru. A total of 6,335,000 
whitefish eggs were received from local fishermen, and the resultant 
fry were planted in Lake Ontario. The lake-herring eggs secured 
from commercial fishermen were few and of poor quality, but such 
fry as were obtained were released in Lake Ontario. The station’s 
