66 



DISCOVERY REPORTS 



Table i. Relative abundance of E, superba at the ice-edge and in the open sea based on average catch- 

 figures, data for the East Wind-Weddell surface stream in roman type, West Wind data in italics. 

 Numbers of net hauls upon which annual averages are based are shown in parentheses {For corrections, 

 see pp. 282-3) 



Month 



Sept. 



Oct. 



Nov. 



Seasonal average 



Dec. 

 Jan. 

 Feb. 

 Seasonal average 



March 

 April-May 

 Seasonal average 



June 



July 



Aug. 



Seasonal average 



Under 16 mm. 



, ' > 



Ice-edge Open sea 



16-20 mm. 



Over 20 mm. 



Number of net 

 hauls 



4041 

 24 



1204 

 6 



1451 

 4 



2018 

 8 



158 

 6 



42 



1 



432 



178 



6343 



3301 



8923 



6217 

 47 



411 



29 



1213 



3 



662 



9 



780 

 12 



10 

 5 

 6 



4 



1 



4130 

 30 



1883 

 10 



3319 

 23 



8313 

 6829 



4714 

 4 



5903 



1 



Under 16 mm. 



3HS 

 18 



(41) 

 {38) 



2749 

 15 



(638) 

 {313) 



Ice-edge Open sea 

 Spring 

 484 



^9 



1612 



2 



1139 

 23 



1201 

 21 



Summer 

 288 



31 



1 



22 



93 

 2 



Autumn 



125 



12 



32 



2 



665 



6 



1472 



37 



967 



25 



22 



45 

 2 



36 



7 



79 



Winter 



Annual averages 

 16-20 mm. 



Ice-edge Open sea Ice-edge 



1 201 

 21 



'28) 



Open sea 



967 

 25 



(239) 

 {156) 



Ice-edge Open sea Ice-edge Open sea 



31 



1 



598 

 2 



160 

 ^7 



344 

 13 



SI 

 12 



1 162 

 26 



710 



761 

 22 



1 147 

 611 

 927 



18 



10 



654 



1 



217 



569 

 33 



480 

 22 



727 

 9 



1826 

 j5 



1791 

 44 



1566 

 22 



1607 

 3 



87 

 2 



1058 

 3 



329 



92 



20 



152 

 6 



Over 20 mm. 



Ice-edge Open sea 



655 "74 



17 17 



(91) (1058) 



[57) (450) 



8 

 6 



IS 

 2 



7 

 20 



30 

 28 



II 



7 



21 

 21 



12 



44 



25 



ID 



1 



17 



2 



5 

 9 



3 



1 



II 

 io 



44 

 32 



71 

 20 



124 



239 



156 



"5 



-^7 



186 



87 



213 



SH 

 i77 



19s 

 76 



no 

 41 



305 

 117 



14 



24 



29 

 3 



51 

 13 



94 



40 



