TILSETH and ELLERTSEN: FOOD ORGANISMS OF LARVAL COD 



A Myrland 26 Apr. 81 



2126 



Q. 

 41 



° 10 



20 



30- 



40- 1 



2 n. miles 



17 14 H 



Myrland 26 Apr. 81 



FIGURE 14.— Particle (A) and nauplii (B) distributions (per liter) in the upper 40 m on the 



Myrland section, 25 April 1981. 



2215 



Fuglehuk 26 -27 Apr.81 



2 n. miles 



0239h 



E 



e 

 Q 



20 



30- 



40-I 



FIGURE 15.— The particle distribution (per liter) in the upper 40 m on the Fuglehuk section 



26-27 April 1981. 



ing the observation period (Fig. 10). This indicates 

 that wind forces have caused increased water tur- 

 bulence, and that these forces have exceeded the 

 naupliar swimming rate. Mixing of surface layers and 

 reduction in particle concentration occurred a few 

 hours before midnight 13-14 May, and the water 



column became completely mixed down to a depth of 

 16 m (see Figure 10). Cod larvae were sampled both 

 before and after this condition occurred (see Figure 

 11). Larval gut content analysis from these samples 

 showed a reduction both in feeding incidence and 

 feeding ratio in samples taken the first few hours 



153 



