470 U.S. BUREAU OF FISHERIES 



In Michigan, the Charlevoix station had a successful season with 

 a very satisfactory quality of eggs yielding a high percentage of hatch 

 for the whitefish and lake trout. At Alpena, Mich., experiments with 

 the use of a charcoal device for the eradication of chlorine in the 

 water supply gave promise of overcoming a difficulty which has in the 

 past produced heavy losses at this point. Approximately 600,000 

 lake trout fingerlings were retained for rearing. On Lake Superior 

 the weather conditions were adverse to a successful collection of lake 

 trout eggs and the take was somewhat below normal. The handling 

 of 6,000,000 whitefish eggs was an improvement over the results for 

 this species in the last few years. The distribution of the fry in the 

 spring from the CharlevoLx station was rendered difficult on account 

 of early hatching before the fish could be transported by vessel. By 

 various expedients including the use of truck, etc., the fry were 

 returned to the spawning grounds in good condition. At Put-in Bay 

 the joint use of the Bureau's steamer Shearwater by the State of Ohio 

 and the Bureau's hatchery resulted in distinct economy. 



Marine stations.- — This group of 3 stations in New England propagate 

 4 species of strictly marine fish. Increase was registered in the output 

 of cod and winter flounder. At Gloucester poor market conditions 

 with no incentive for commercial operations reduced the catch of 

 poUock and consequent collection of eggs. This station handled 

 almost one billion cod eggs of which over 600,000,000 were planted after 

 fertilization upon the spawning grounds, the balance being incubated 

 in the hatchery. This is the main station at which haddock are 

 handled, and during a short season over 235,000,000 eggs were taken. 

 The propagation of flounders is concentrated at the other 2 stations 

 located at Boothbay Harbor, Mame, and Woods Hole, Mass. An 

 average or normal season prevailed at Boothbay Harbor, Mame, 

 although there was a slight improvement in the take of haddock eggs 

 all of which were planted directly on the spawning grounds because of 

 the fact that the water at the hatchery was too warm for their incu- 

 bation. An interesting feature is the fact that the collection of adult 

 flounders from which the eggs of this species are taken at th^s station, 

 was materially reduced by the disappearance of eel grass. This 

 epidemic which has aftected the growth along the entire Atlantic coast 

 caused the flat fish to move their spawning grounds and added to the 

 difiiculty of egg collections. 



At Woods Hole a new diesel-powered vessel has materially lowered 

 costs for the collection of brood cod. A smaller number of adult cod 

 was secured for eggs than in previous years but because of their 

 better condition the hatch of fish was very satisfactory. In addition 

 to the routine fish cultural work it was necessary to give considerable 

 attention to the maintenance and upkeep of the extensive plant at 

 Woods Hole since biological studies are also carried on during the 

 summer months. 



Anadromous species of Atlantic coast. — The commercial varieties 

 handled on the Atlantic coast aside from the marine fish are the shad, 

 yellow perch, white perch, glut herring, and Atlantic salmon. The 

 latter is handled only at the hatchery at East Orland, Maine, and its 

 substation. An exchange of eggs with the Canadian Government 

 provided the usual supply-of 1,000,000 eggs of this species. Part of 

 them were allotted to the State of Maine hatcheries for incubation 

 and distribution and the remaining share distributed as fingerlings in 



