[13] PLAN OF INQUIRY FOR FISHERY CENSUS. 15 
Sardine or Pilchard (Pomolobus ceruleus). 
Herring (Clupea mirabilis). 
Sturgeon (Acipenser acutirostris, &c.). 
Columbia River Sturgeon (Acipenser transmontanus). 
II.—FISHING GROUNDS. 
MANNER OF DISCUSSION IN REPORT. 
Ona general map should be indicated the geographical distribution 
of all animals, &c., which are sought by fishermen; also the location of 
the principal fishing grounds. On charts of minor scale should be indi- 
cated in detail the location of all 
Off-shore fishing banks and shoals. 
In-shore fishing grounds and ledges. 
Seining flats and reaches. 
Stations for gill and fixed nets. 
Locations of weirs, traps, and pounds. 
Seal rookeries. 
Lobster crawls. 
Oyster and clam beds. 
Sponge reefs. 
Moss ledges (for “ Irish moss ”), 
Each important fishing ground should be described with reference to 
its topography and climate, location, area, depth of water, character of 
bottom, temperature of water, currents, character of invertebrate 
life, ete. 
METHOD OF INVESTIGATION. 
As has already been stated, maps of the coast will be supplied, drawn 
on a scale sufficiently large to admit of marking in the various kinds of 
fishing grounds mentioned above. 
Each fishing station should be carefully designated on the map, with 
its local name, notes on depth of water, and on the kind of fish and in- 
vertebrates commonly to be found there. The names of those species 
best taken there should be underscored. 
Temperature observations are daily being taken at about thirty sta- 
tions on the ae principally light-ships and signal-service stations. 
Where convenient it will be well to take surface and bottom tempera- 
tures on any good fishing grounds, the date, time of day, state of the 
clouds and tide being carefully noted. For this purpose a thermometer 
will be furnished. 
When a person engaged in taking observations on temperature is 
encountered he should be encouraged and his attention called to the 
importance of keeping the records of the movements of fishes in the last 
column of the blank (No. 35) furnished them. 
