306 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1946: 
7-12 mm YOUNG 12-50 mm HERRING 50 7O0mm ADULT HERRING 
O-! menth Le a 1-6 months 6 = té months 200 mm. 8-9 inches 
H Be aaa i j 7 
' Asie pa ae a 
s ne =e i 
Picwrobraci i 
Mollusca | ‘ Barnacle |, ~ nee e Decapod } 
tecren Nauplii Larvae 
’ 
\ 
iN. 
Bchizopoda Amphipoda 
. 
x 
al N 
S 
Tintinnidae A ; Acartla ‘| Meiridta a Caianus 
Narpactids Neupli COPEPCDA ° 5 P| 
Rotifera teas Pseudocaianus ~ {Centropages acai ate Euchaeta [. 
. 
\ 
M 1 H 
Echinoderm | } Invertebrate ‘ 
Larvae Ova ui 
H 
H 
Dincfiag= 
allatcs Thallzseiosira Coscinodiscus Chaetcceros Skeietonema Nitzechla 
Speres DIATOMS Spores 
Thailassiothrix Melosira Ditylum Biddulphia Fihizoeolenta 
FicurE 1.—Food relations of the Pacific herring, Clupea pallasi. In this dia- 
gram the complex relations of the various marine animals and plants entering 
into the diet of herring are set forth. The arrows point to the food eaten, the 
solid lines indicating that consumed by herring, the dotted lines that consumed 
by other animals. It has not been possible to figure all the animals and plants 
mentioned in this diagram, but most of them will be mentioned, described, or 
figured in one or more of the works cited in the selected bibliography, page 310. 
(Courtesy of G. H. Wailes, from the Vancouver Museum Notes. ) 
FRESHWATER i-2 YEARS MARINE 2-5 YEARS 
INSECTS |} Fis” | | -REPTILES BIRDS INVERTEBRATES FISH 
Water-heatios | Riou Snakes Kingtishers Parasites Dogfish ae = 
weieh aa-Lions 
Dragon-fly larvae ane Turtles Herons Loon Cod et cetera 
SUCKERS Ducks Grebo Lampreys Blackfish 
Whiteiieh ! Grows 
Porpoises 
Liag ii 
H Parasites ’ 2 : Besar Raccoon . H 
+ 7°) Fung * + | Otter Marten ‘ 
' 
' 
oat Ml Bectaria ‘, Mink 
ENEMIES 
Fry Fingerlings 3 Yearlings z= 
0-3 months 3-6 months 6-12 months 
1-2 inches 2-4 Inchee 4-3 inches 
*. 4 ADULT SOCKEVE 
3-6 Years 
SOCKEYE 
Gnate ¥ Copspoda Small Fish Echinodermata Schizopoda 
Midges ; Coe! Amphipoda 
Nauplil 4 L Leeches oelenterates 
Cladocera t Roltera anita 
ee fa | E Ciliates Annelids 
Alga a 
cis 2 Dinofiagatlates || Dinoflagetlates 
Ficure 2.—Food relations and enemies of the sockeye salmon, Oncorhynchus 
nerka. In this diagram the complex relations of the marine animals and 
plants entering into the diet of the salmon, as well as the species of animals 
preying upon the salmon, are set forth. The arrows point to the food eaten, 
the solid lines indicating that consumed by salmon, the dotted lines that con- 
sumed by other animals. It has not been possible to figure all the animals and 
plants mentioned in this diagram, but most of them will be mentioned, de- 
scribed, or figured in one or more of the works cited in the selected bibliog- 
raphy, page 310. (Courtesy of G. H. Wailes, from the Vancouver Museum 
Notes.) 
