1169) 
Industrial pollution is often more damaging to the sensitive mollusc than 
human waste pollution. Copper and other high molecular weight metals are par- 
ticularly poisonous to them in exceedingly slight concentration. It is not at all 
certain that the waves of epidemic diseases that have affected broad areas of 
molluse producing areas are not induced by the weakened condition of the 
animals deriving from pollutants in undetectable amounts. 
Silting and the destruction of shell beds have destroyed the possibility of 
molluse culture in broad coastal areas by eliminating clean cultch for the 
embryo’s to set on (oysters) or smothering them before they can grow. 
Farming is not practiced where the farmer does not have control over and 
ownership of the product and land. Tideland tenure laws do not permit this in 
many states with excellent aquaculture possibilities. 
The Federal Fishery Function should work toward eliminating these and 
other barriers to the farming of oysters, clams and mussels. 
(b) Salmon and Trout.—Salmon and sea-run trout form particularly fine sub- 
jects for aquaculture and this is held back almost entirely by institutional 
barriers. 
The Federal Fishery Function should be given authority and funds to experi- 
ment with the aquaculture production of salmon and sea-run trout on a com- 
mercial basis involving private control of a whole river system, full authority to 
harvest the result by any method (including lease of sport fishing rights), and 
encouragement to selectively breed efficient stocks. 
This could readily be initiated and explored with light social interaction on 
small coastal streams, especially in Alaska but also in the other west coast states, 
and particularly on streams all, or mostly, included within federally owned lands. 
TABLE |.—CATCH OF FISH AND SHELLFISH, 1926-67 
Average price per pound 
Catch for 
Catch for industrial Million 
Year human food ! products 1 2 Total 1 dollars Cents 
SHOTS 9 Ce ae a 2, 198 673 2,871 @) (3) 
TAPE ch IIR A id at Ae ee 2,172 634 2, 806 @y (3) 
FIG PAS 2D CET a ee a 2, 370 691 3, 061 @) Q) 
192.9 RE Neate! POS eS oe 2,601 890 3, 491 (3) (8) 
193 OMI BURSON DEAE Mee oi 2,478 746 3, 224 109 3.39 
193 RAE Pant aG SN 2,129 501 2, 630 77 2.94 
LOS ORES NOE EIS NE Me en Ma 1, 864 748 2, 612 56 2.13 
OSB ea ae Sey Bg 2, 086 911 2,997 (@) @) 
OS ARS fee area CUE Ve Pe 2,434 1,670 4,104 (8) () 
OSS Woe Swe ae aE 2, 583 1, 552 4,135 (3) (8) 
LO 3G Remar POT STN Se eT es 2, 854 1,972 4, 826 @) (8) 
193 Be EN ee ee ee ee 2,703 1, 650 4, 353 101 2.32 
IOS REMaE pe aL iE Bink ANS a 2,639 1,615 4,254 94 2. 20 
TCC AS) ae ae se OE ca ee 2,713 17382 4,445 97 2117) 
GAD MRE te oaths i tem ee 2,675 1, 385 4, 060 99 2. 44 
TST ga a gt 2 ae eet 3, 062 1, 838 4,900 129 2.63 
DOA DB pes mnie SA ola 2, 683 1, 192 3, 875 170 4. 40 
TIES cos BAN a RR 9 CN Rie Sa 2,737 1, 425 4, 162 204 4,90 
9 AAT EMER e ii oe UT 2, 865 1, 668 4,533 213 4.79 
TIGA Boe Sell A Se a 3, 167 1, 431 4,598 270 5. 87 
TIRE a I Le 3, 049 1, 418 4, 467 313 7.01 
TG YEET Ps SiR 3 2 a ie ye 3, 020 1, 329 4, 349 312 7.16 
GA Mee nema b hae Soy oe elt 3, 146 1, 367 4,513 371 8. 22 
NYAS OES ESI as 10 ee ree ee 3, 305 1, 499 4, 804 343 TNS 
195 Oe AR a 2 43, 307 1,594 4,901 347 7. 09 
WCHL: joes Eee ey I eS Sipe ee 3, 048 1, 385 4, 433 365 8. 23 
ICIS 22 Se a a eee aes 2,778 1,654 4, 432 364 8.20 
1953 ewe Se ee Sie he a 2,519 1, 968 4, 487 356 8.94 
GAMER Db eri Se a Ne 2,705 2, 057 4,762 359 7.55 
1S Ga) SS Sa | Lal eo 2,579 2, 230 4, 809 339 7. 05 
NG bGwaemlin eins or Pe 2, 690 2,578 5, 268 372 7. 06 
O57 Raia es 2, 475 2,314 4,789 354 7.39 
TERR oe Sa I Te pe age ea eee 2,651 2, 096 4,747 373 7.86 
1959 Beis ne 5) 2 A ee 2, 369 2,753 5, 122 346 6.76 
196 ()MRIEMER RRR rr Sa hal 2, 498 2,444 4,942 354 7.15 
TIGL aE Pos 2 ele BS Tanda ee 2, 490 2, 697 5, 187 362 7.98 
NOG 2 Mra OS ce lh oe 2, 540 42,814 45,354 396 7. 40 
LOGGER ERE Dyin Tee oa all 2, 556 2,921 4, 847 377 7.78 
SSG Aa RUE Ge ee haa i 2,497 2, 044 4,541 389 8.57 
TS RR ae ratty NC Ss 2 LN at 2, 587 2,190 4,777 44 9. 33 
SG Gt ee eS CE i) A Ae 2,572 1,792 4, 364 4472 410.82 
BS Gea eee IS Py Pay NE 2, 385 1,677 4, 062 438 10.79 
1!n million pounds. : ‘ P 
2 Processed into meal, oil fish solubles, homogenized condensed fish, shell products, and used as bait and animal food. 
3 Not available. 
4 Record. 
Note: Does not include data on the Hawaiian catch prior to 1946. 
