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Table 3 Average and maximum value (in parenthesis) of biomass for both copepod size fractions and their relative contribution to total biomass during summer in Subantarctic (Subant.), Antarctic (Antar.) waters and Polar Front

From: Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer

  Summer 2000 Summer 2001 Summer 2003
Subant. waters Antar. waters Subant. waters Polar Front Antar. waters Subant. waters Antar. waters
Biomass (μg C m−3)
 <300-μm fraction 87 (227) 0.2 (0.5) 1,098 (4,659) 464 (758) 79 (291) 222 (438) 1.7 (16)
 >300-μm fraction 1,179 (5,242) 2 (9.8) 8,778 (20,244) 8,068 (27,542) 2.2 (8.5) 618 (3,293) 10 (82)
 All 1,151 (5,291) 1.5 (10) 9,877 (24,903) 8,531(28,300) 81 (291) 840 (3,409) 12 (82)
Relative contribution
 <300-μm fraction 30% 61% 18% 53% 96% 67% 50%
 >300-μm fraction 70% 39% 82% 47% 4% 33% 50%
Biomass (μg C m−3)
 Nauplii 9 (90) 0.01 (0.06) 77 (937) 76 (488) 9 (123) 137 (344) 1.5 (15)
 Oithona similis 42 (127) 0.08 (0.49) 787 (3,545) 150 (322) 40 (136) 81 (196) 0.2 (1.7)
 Microsetella norvegica 4 (15) 0.12 (1) 2.2 (12) 9 (24) 4 (12)
 Oncaea curvata 1 (4) 1 (10)
 Rhincalanus gigas 2 (16)
 Calanus simillimus 1,042 (5,041) 1,372 (7,847) 810 (2131) 34 (204)
 Calanoides acutus 41 (154) 1.2 (9.7) 7,276 (14,550) 6,600 (23,855) 0.9 (8) 549 (3,294)
 Ctenocalanus citer 0.4 (2) 4 (27)
 Metridia gerlachei 51 (234) 124 (415) 134 (508) 30 (182)
 Clausocalanus laticeps 4 (37)
 Sapphirina 4 (27)  
 Paraeuchaeta antartica 517 (2,068)
 Subeucalanus longiceps 1 (11)
  1. All the species recorded are shown