FISHERY INDUSTRIES OF THE UNITED STATES, 1929 1063 



Common and scientific names of the commercial fishery products caught in the 

 United States and Alaska — Continued 



Common name as shown 

 in bureau reports 



Other common names 



Scientific names 



Squid 



Turtles: 



Green 



Loggerhead . 



Uawlcsbill.. 



Snapping... 



Terrapin 



Frogs 



Irish moss 



Kelp 



Sponges: 

 Glove. 



Mud turtle, mossback.. 

 Diamond-back terrapin. 



Grass 



Sheepswool 



Yellow ' 



Tiepang I Sea cucumber. 



(Loligo opalescens (Pacific coast). 

 \Loligo pealei (Atlantic coast). 



Chelonia mydas. 

 Thalassochelys caretta. 

 Chelonia inbricala. 

 Chelydra serpentina. 

 Alalacoclemmys palustris. 

 Ranasp. 



Chondrus crispus. 



Macrocystis sp ; Nereocystis sp.; 

 Pelagophycus sp.; Alaria sp. 



Spongia graminea (Hyatt) Euspongia 



officinalis (L.). 

 Htppospongia equina cerebriformis. 

 Hippospongia canaliculata gossypina. 

 Hippospomia equina elastica. 

 Cucumaris frondosa; Thyone briareus. 



METHODS USED IN COLLECTING STATISTICS 



In order that persons using the statistics in this report may judge 

 as to their completeness and authenticity, there follows an outline 

 of the methods employed by the bureau in collecting fishery statistics. 

 It will be noted that several methods are used. Each, in so far as 

 possible, is the most efficient that can be developed to accomplish 

 the desired result with the available personnel. 



General fishery statistics. — The purpose of collecting general fishery 

 statistics is to obtain statistics on the catch of fishery products and 

 its value as landed by the fishermen, the quantity or number of each 

 kind of gear used, the number of fishing boats, the number and net 

 tonnage of fishing and transporting vessels, the number of wholesale 

 ■establishments, the amount of wages and salaries paid in these estab- 

 lishments, the quantity and value of products prepared, and the 

 number of persons engaged in each phase of the industry. 



The scope of the coastal surveys includes the commercial fisheries 

 of the oceans, bays, and coastal rivers as far inland as commercial 

 fishing is important. This usually coincides with the range of com- 

 mercial fishing for anadromous species. Statistics of the fisheries of 

 the Mississippi River include the fisheries of the Mississippi River 

 proper, as well as all tributaries wherein commercial fishing for either 

 fish, crustaceans, or mollusks is prosecuted. Statistics of the lake 

 fisheries include those prosecuted in the Great Lakes, adjacent bays, 

 and the international lakes of northern Minnesota, as well as certain 

 rivers having outlets into these waters. 



General statistics of the fisheries of the United States are not 

 collected each year, but each year statistics are collected for several 

 geogi'aphical sections. The aggregate of these statistics for the vari- 

 ous years is taken to represent an average je&r. 



In conducting these surveys it is the custom of the bureau to dis- 

 patch agents to the districts to be surveyed early in the calendar 

 year. They obtain statistics on operations during the previous cal- 



