FORTY-FIRST BIENNIAL REPORT 



85 



greater amount of water was reliabilitated. The following waters were 

 treated : 



* One-fourth acre-foot when treated. 



Rock masonry barrier dams were constructed on the outlet streams 

 of Richardson and Miller Lakes, to prevent re-entrA- of rough fisli into 

 the lakes. 



FISH RESCUE 



The rescue of game fish from drying waters and their traiisffr to 

 safe waters is carried on each year throughout the State. In some art-ns 

 such work is needed only occasionally, as when a reservoir is drained for 

 repair or examination of the outlet structure at the dam. rnusual or 

 isolated cases of this sort are assigned to crews recruited from (mo «.f 

 the hatcheries, or are taken care of by state wardens or sportsmen in 

 cooperation with the Bureau of Fish Conservation. In other areas, how- 

 ever, large-scale fish rescue is required annually and forms a regular 

 part of the program of the Bureau. This is true in some of the stcelhond 

 and salmon waters, and here this work has been plaeod under the super- 

 vision of the biological staff. The fi.sh rescued are tabulated in Appen- 

 dix D. 



FISH INTRODUCTIONS 



If an existing fisherv is not producing results eominensurate with 

 expectations, there frequently arises a great hue and .ry for the intr..- 

 duction of some exotic species. Some sad experienees resulting from s.irh 

 introductions manv vears ago have taught us to exercise extreni.' <•»»<'."'" 

 in making anv new ones. It is therefore the poliey of the Bureau of F ish 

 Conservation to seek first other means of producing satisfaetory anj.'ling 

 and to introduce a new kind of fish into a body of water only if tlie taets 

 indicate that it wiU fill a previously unoccupied niche m th.- .M.onoraj 



