FISHERY BULLETIN: VOL. 78, NO. 2 



Nosema anomala, which invade the intestinal 

 wall of the young of the threespine stickleback, 

 Gasterosteus aculeatus , and generate hyper- 

 trophied cells filled with its vegetative and repro- 

 ductive stages (Lorn 1970). Certain viral diseases 

 produce degenerative changes that include necro- 



sis and sloughing of intestinal epithelium 

 ( Yasutake 1975). On the other hand, starvation of 

 immature salmon cause, among other things, 

 marked atrophy of the stomach with degeneration 

 of the epithelium, which ". . . could presumably be 

 used for nourishment" (Love 1974). Starvation of 



Table l. — Numbers of northern anchovy larvae and other data by net tow for March 1977, off southern California. Number 

 emaciated and standard length pertain only to sectioned larvae. See Figures 13 and 14 for tow locations. 



Tow 



Date 



Hour 



Temperature 

 (°C) 



Plankton 

 volume (ml) 



Number of Larvae 



In tow 



Sectioned 



Mean standard 

 length 



Number emaciated 

 Severe Moderate Incipient 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



M3 

 14 

 15 

 16 

 17 



M8 

 19 

 20 

 21 

 22 

 23 

 24 



'25 

 26 

 27 

 28 

 29 



'30 

 31 

 32 

 33 

 34 



'35 

 36 

 37 

 38 

 39 

 40 



'41 

 42 

 43 



'44 

 45 



'46 

 47 

 48 

 49 

 50 

 51 

 52 

 53 

 54 

 55 

 56 

 57 



'58 

 59 

 60 

 61 

 62 

 63 

 64 



1 



5 



4 



2 



2 



3 



3 



2 



3 



4 



3 



1 



8 



11 



4 



4 



10 



3 



7 



4 



21 



7 



32 



6 



10 



3 



12 



7 



14 



8 



7 



11 



35 



14 



5 



6 



38 



10 



33 



17 



29 



106 



4 



21 



1 



12 



7 



13 

 21 

 15 

 19 

 29 

 42 

 7 



10 



20 



7 



30 



27 



17 



12 



15 



5 



2 







9 



33 



9 



9 



14 



68 



47 



54 



7 



2 



32 



2200 



43 



24 



59 



20 



15 



70 



65 



2400 



16 



2350 



40 



54 



5 



180 



56 



62 



67 



8 



2200 



2300 



97 



22 



122 



2250 



19 



4 











1 



1 



1 







1 







2 



2 



3 



2 



16 



35 























5 



3 



1 



11 



42 



22 



6 



7 

 5 

 5 

 6 

 6 

 6 

 6 

 7 

 2 

 6 

 6 

 6 

 10 

 6 

 7 

 6 

 6 

 7 

 6 

 6 

 7 

 6 

 6 

 5 

 6 

 5 

 6 

 7 

 6 

 6 

 6 

 7 

 6 

 7 

 6 

 6 

 4 



2 

 2 



3 



2 



16 



15 



4 

 3 



1 



7 

 14 

 15 



4.6 

 4.0 

 5.0 

 4.9 

 6.4 

 5.4 

 4.7 

 4.5 

 4.9 

 39 

 5.1 

 5.2 

 4.7 

 6.7 

 4.7 

 5.5 

 4.2 

 5.5 

 6.5 

 5.0 

 5.7 

 6.0 

 4.2 

 4.4 

 44 

 4.9 

 5.4 

 5.3 

 5.3 

 5.4 

 4.7 

 4.9 

 4.8 

 5.7 

 6.9 

 7.1 

 6.6 

 12.5 



8.0 



5.9 



12.2 



8.5 



10.6 



9.3 



7.2 



8.2 



12.3 



11.0 



9.8 

 12.8 

 11.7 

 9.4 

 7.1 

 6.9 



'Taken at same location as precedi 

 ^Number estimated from count of a 



ng tow at almost twice the depth, 

 substantial fraction. 



480 



