SEA-FISHERIES LABORATORY. 



251 



The Copepoda have two maxima in the year, the first 

 in April and the second in September and October. The 

 records start in January with about 2,000 per haul and 

 keep below that level throughout February and most of 

 March. During April they rapidly mount up with a 

 series of successively higher records, with falls between, 

 such as April 2nd 4,500, April 13th 10,775, April 16th 

 11,600, till the climax is reached on April 27th with 

 29,825. During May the numbers are low, 1,045 to 

 6,505, in June they rise somewhat, 13,610 on the 11th 

 and 15,450 on the 27th, falling again in July to numbers 

 between 2,895 and 7,930. August shows a series of rises 

 with falls between, the tops being 18,200 on the 10th, 

 19,400 on the 14th, 14,700 on the 15th, 16,915 on the 

 24th, and 10,970 on the 29th. September begins at a low 

 level, reaches 11,942 on the 4th, and, with falls between, 

 27,177 on the 12th, 13,440 on the 20th and 27,31'2 on the 

 20th, followed by 10,582 on 21st, 18,450 on 23rd, 11,850 

 on 24th, and 12,110 on 30th. October is also high, with 

 16,973 on the 9th, 27,790 on 14th, and 24,480 on 24th. 

 Xovember shows one high figure, 10,937 on the 8th ; while 

 December ranges from 1,724 to 2,755, the year's record 

 ending very much at the same level at which it commenced 

 in January. 



The range in number of the Copepoda per net, 30 to 

 29,800, is considerable compared with that of some other 

 groups. 



The monthly averages of the Copepoda per net during 

 this vear are as follows : — 



Jan. 



.. 1,816 



July ... 



... 5,462 



Feb. ... 



793 



Aug. ... 



... 5,496 



Mar. ... 



.. 1,379 



Sep. 



... 6,514 



Apr. 



.. 5,858 



Oct. ... 



... 17,572 



May ... 



.. 3,415 



Nov. 



..." 6,923 



June 



.. 12,138 



Dec. 



... 2,289 



