BIOLOGY OF THE ATLANTIC MACKEREL 219 



Table 18. — Record of oblique hauls made with a 2-meter net during cruises VIII and IX, 1932 



Note:— The above table does not include hauls falling to take mackerel larvae. For a list of these see foot of table 19 and table 20. 

 RECORDS OF TOW NETTING AND CATCHES OF 1932 



Since the methods of reducing catches of eggs and larvae to the standard basis 

 on which the conclusions of this paper rest, are, to a considerable extent, novel, and 

 therefore have not stood the test of usage, and since techniques may be altered in the 

 future in such a way as to require recalculation of present results to provide material 

 for comparison, there are given in tables 17 to 20, inclusive, the more pertinent of the 

 records of the cruises of 1932. 



Tables 17 and 18 give the conditions under which the hauls were made, and the 

 relation of the data to each other may be understood by consulting table 15. Similarly, 

 tables 19 and 20, giving the counts of examined portions of catches and the standard- 

 ized total catches, were based on computations illustrated by table 14. 



Since the data on hydrographic conditions have already been published (Bigelow, 

 1933, pp. 124-128 and 131-133) they are omitted from this paper. 



