170 



FISHERY BULLETIN OF THE FISH AND "WILDLIFE SERVICE 



of the carbohydrate-poor, high-salinity waters of 

 the Gulf of Mexico into the carbohydrate-rich 

 and low-salinity waters of Santa Rosa Sound. 

 Whether this means that the correlation is due to 

 the falling off in the carbohydrate values in pro- 

 portion to the volume of gulf water intruding, or 

 reflects an inverse relation between carbohydrate 

 production and salinity in gulf waters, is not 



evident in these data. Lack of knowledge of the 

 origin of these carbohydrates precludes specula- 

 tion on the part that might be played by the 

 salinity tolerance of the organisms responsible for 

 their production. The association of carbohy- 

 drates with salinity illustrated could be the result 

 of both physical dilution and biological inter- 

 ference due to salinity changes. 



15 



r A 



10 



LU 



LU 



o. 



DAYLIGHT 



UNFILTERED 



-• — • , 



AERATED 



\ 



\non-aerated •" 



WITH AGITATION 



X. 



; 4 



.—-•-...--••*, 





•^ — 

 . - • — • 



o 



2 



I 



uj • 



h- 



Q 



> 



x A 

 O 4 



m 



< 



7 



6 



U B 



DAYLIGHT 



UNFILTERED 



SURFACE / 



BOTTOM 



WITHOUT AGITATION 



DAYLIGHT 



FILTERED 



, AERATED _ , 



' "non^a'erated * 



,-^r-»-«-eri. 



D 



DARK 



UNFILTERED , 

 — • • » •■«' 



■••«.. 



"«., 



••• « 



»- • 



.FILTERED 



•■• ,. # . 



I 



4 5 6 



AGE OF CULTURE- DAYS 



Figure 1. — Behavior of carbohydrates in standing sea water. A. — Exposed to daylight, unfiltered, with agitation. 

 B. — Exposed to daylight, unfiltered, without agitation. C. — Exposed to daylight, filtered, aerated and nonaerated. 

 D. — Kept in dark, filtered and unfiltered. 



