XXII REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



salmon and 8.9 per cent on the steelheads. The loss in the troughs 

 amounted to 9.1 per cent, 143,374 salmon being taken out at the expira- 

 tion of seven months. It is probable that the loss on the trough fish 

 during the three months that the others were in the ponds did not 

 exceed 3 i)er cent, but in point of growth the pond flsh were far supe- 

 rior, the pond salmon in the fall averaging 101.1 grains against a mean 

 of 45.8 for the trough fish. These figures were obtained by actually 

 weighing the fish. 



A summary of the result of rearing fry to the yearling stage from eggsi 

 collected in the fall of 1895 is presented below in tabular form : 



Atlantic salmon. — During the previous June 677 brood salmon were 

 collected and released in the iuclosure at 13ead Brook; and, with the 

 view of increasing this stock, a trap wns constructed early in August 

 near the Bangor Dam in order to stop any salmon that might ascend 

 the river to spawn in the fall. This dam, located below the natural 

 head of tide water, is subject to partial submergence during jieriods 

 of high water. It is also provided with a good fishway, but it forms a 

 serious obstacle, nevertheless, to the ascent of fish, and considerable 

 numbers were collected there during the season. They were especially 

 noticed under the wheelhouse of the waterworks at the west end of 

 the dam, where the trap was located. This trap was constructed of steel 

 and wood, as offering the least resistance to the constant heavy current, 

 being formed like a pound in an ordinary weir, with a V- shaped entrance 

 and a wing running obliquely out into the river. It was secured by 

 bolts and numerous guys in the ledge forming the bed of the river, and 

 was provided with halyards by which it could be drawn up for inspec- 

 tion or hauled down for work. The trap proved to be well adapted for 

 the purpose, as the salmon passed in readily and were removed without 

 difliculty or serious injury. The work of construction was quite ardu- 

 ous and consumed more time than was anticipated, as it was not ready 

 for operation until August 12, when the water temperature registered 

 790. It had also become very muddy from the operations of a contractor 

 who was putting in a cofferdam preliminary to some improvements to 

 the waterworks. Under these adverse circumstances very few salmon 

 were taken ; but the conditions improved later on, and 8 were secured 



