GUIDE TO TABLES 



A record of haul data for 1951 has already been presented in Special 

 Scientific Report: I^'ishei'ies No. 73 (May 1952). 



Table I. Standardized haul factors. The factors adjust each haul to 

 the comi)ara'ble standard of 10 cubic meters of water strained 

 per meter of depth fished (see text). 



Table II. Record of Pilchard Eggs, 1951. 



Kum ber of normal e ggs: Number of normally developing 

 pilchard, eggs. 



Total n umber of ea/^s : Includes all pilchard eggs taken 

 in a sample, whether normal or abnormal. Pilchard eggs were 

 classified as abnormal when the embryos were stunted and mis- 

 shapen in appearance. It is not known whether such abnor- 

 malities axe caused by a diseased condition of the eggs or 

 by mechanical injury during collection. 



The letters A through D are used to designate age cate- 

 gories of eggs: 



^: Eggs spawned within 24 hours of collection 

 B: Eggs spawned within 24.1 to 48 hours of collection 

 Cl Eggs spawned within 48.1 to 72 hours of collection 

 D: Eggs spawned within 72.1 to 96 hours of collection 

 Unci as si Unclassified eggs - deteriorating eggs that 

 could not be classified with certainty. 



Average n ' : Average numbei xif eggs spawned per day. 

 Because of incomplete age categories, resiilting from hauls 

 having been taken while spawning or hatching was actively 

 taking place, not all age categories were used in determining 

 n', but only those followed by an asterisk. 



Table III. Record of Pilchard Larvae, 1951. 



Midpoin t of size cla s ses: The larvae are grouped into 

 size classes which have the following midpoints and ranges: 



Midpoint Range Midpoint Range 



(in mm. ) (in m m.) (in mm. ) (in mm.^)^ 



3.25 2.26-4.25 12.75 12. 26-13. 25 



4.75 4.26-5.25 13.75 13.26-14.25 



5.75 5.26-6.25 14.75 14.26-15.25 



6.75 6.26-7.25 15.75 15.26-16.25 



7.75 7.26-8.25 17.25 16.26-18.25 



8.75 8.26-9.25 19.25 18.26-20.25 



9.75 9.26-10.25 21.25 20.26-22.25 



10.75 10.26-11.25 23.25 22.26~24.25 



11.75 11.26-12.25 



