SEA-FISHERIES LABORATORY. 



375 



chief planktonic groups, per haul of the standard net for 

 the twelve months : — 



Double Average Diatoms. Dinoflag- Copepocla. 



1912. hauls. catch. ellates. 



January 8 2-7 48,409 4,697 6,227 



February ... 8 2-8 60,409 1,611 3,346 



March 8 15-4 4,099,737 19,235 2,801 



April 9 25-5 21,267,907 2,233 3,213 



May 9 36-3 27,891,917 1,299,576 53,742 



June 7 37-5 46,824,314 24,014 74,129 



July 9 13-6 40,966 2,684 32,620 



August 9 13-1 683,874 306 31,996 



September ... 9 23-4 8,172,122 2,681 46,207 



October 7 9-6 242,486 679 75,577 



November ... 8 3-2 41,642 5,409 14,078 



December ... 7 6-4 11,659 1,423 6,044 



Copepod Copepod 

 nauplii. 

 4,605 

 5,940 

 23,967 

 13,204 

 191,089 

 122,643 

 39,789 

 32,196 

 27,904 

 35,463 

 6,470 

 1,803 



juv. 











400 







4,456 







389 



271 



















This table may be compared with the similar ones in 

 the last three Reports (Part III, p. 212, Part IV, p. 199 

 and Part V, p. 130). Compared with that for 1911, it 

 shows a lower actual maximum in total catch (37'5 c.c. 

 in June, 1912, as against 46 c.c. in May, 1911), but the 

 general level of the catches from March to June is higher 



Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dee 

 Fig. 1. — Total Plankton Curves (horizontal and vertical nets) in the Bay. 



