BROOK TROUT 



in the females, but it would have been undeveloped 

 ova, the same as he found in August, except that the 

 latter was further advanced. In this State brook trout 

 spawn in October, with some variation, depending upon 

 the water, for the colder the water the earlier they will 

 spawn. 



At the Adirondack hatching-station of this Commis- 

 sion, in Franklin County, they begin to spawn about 

 October 1st; at the Caledonia station, in Livingston 

 County, they begin to spawn about October 15th, and 

 eggs are taken as late as the following March, and 

 have been taken as late as April 19th ; at Cold Har- 

 bor station, on Long Island, they begin to spawn the 

 last of October, but the height of the season is from 

 November 10th to 30th, although a few fish come on 

 in December and as late as January. 



In running streams the temperature of the water 

 would follow closely the temperature of the air, and 

 the spawning would be early if the season were cold, 

 except in streams that were largely spring-fed, in which 

 case the temperature of the water would not fall so 

 rapidly and the spawning would be prolonged. 



Trout spawn when they are " yearlings," but a year- 

 ling is more than twelve months old. AH brook-trout 

 eggs are hatched in the spring, and the period of incu- 

 bation varies with the temperature of the water. The 

 eggs taken the first of October in Northern New York 

 may be 150 days hatching, while the eggs taken on 



Long Island the last of November will be only about 



152 



