Summary
Fourteen species of the genus Euchaeta (Copepoda: Calanoida) were encountered during two cruises undertaken around South Georgia during November–December 1981 (Summer) and July–August 1983 (Winter). All 14 species were present in summer but only nine in winter. The distribution of the majority of species centered on the mesopelagic (500–1000 m) and bathypelagic (1000–2000 m) depth horizons. During both cruises, four species, Euchaeta Antarctica, E. biloba, E. rasa and E. farrani were numerically dominant. Although all four species had a wide depth distribution, E. Antarctica and E. biloba had distributions centered around the 250–500 m (epi-mesopelagic) and mesopelagic depth horizons. E. rasa was most abundant in the mesopelagic whereas E. farrani, the largest species encountered, was centered on the mesopelagic and bathypelagic depth horizons. Two species, E. Antarctica and E. biloba commonly occurred in the surface 250 m, the former being far more abundant especially over the shelf and shelf break areas, with a high abundance of copepodite stages IV and V being present in summer and adults in winter.
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References
Alvey NG and 17 others (1983) The Genstat Manual. Rothamsted Experimental Station, Harpenden, Herts
Atkinson A, Peck J (1988) A summer-winter comparison of zooplankton in the oceanic area around South Georgia. Polar Biol 8:463–473
Bradford JM, Haakonssen L, Jillet JB (1983) The marine fauna of New Zealand: pelagic Calanoid Copepods: families Euchaetidae, Phaennidae, Scolecithricidae, Diaixidae and Tharybidae. NZ Oceanogr Inst Mem 90:1–150
Fontaine M (1967) Two new species of Euchaeta (Copepoda, Calanoida). Crustaceana 12:193–213
Fontaine M (in press) The taxonomy and distribution of the Antarctica species group of the genus Euchaeta (Copepoda: Calanoida). Biol Antarct Seas
Foxton P (1956) The standing crop of zooplankton in the Southern Ocean. Discovery Rep 28:193–235
Hardy AC, Gunther ER (1935) The plankton of the South Georgia whaling grounds and adjacent waters 1926–1927. Discovery Rep 11:1–456
Heywood RB, Everson I, Priddle J (1985) The absence of krill from the South Georgia zone, winter 1983. Deep-Sea Res 32:369–378
Park T (1978) Calanoid Copepods belonging to the families Aetideidae and Euchaetidae from Antarctic und Subantarctic waters. In: Pawson DL (ed) Biol Antarct Seas 7, Antarct Res Ser 27:91–290
Pommeranz T, Herrmann C, Kuhn C (1983) Mouth angles of the Rectangular Midwater Trawl (RMT1+8) during paying out and hauling. Meersforschung 29:267–274
Priddle J, Heywood RB, Theriot E (1986) Some Environmental Factors influencing phytoplankton in the Southern Ocean around South Georgia. Polar Biol 5:65–79
Priddle J, Croxall JP, Everson I, Heywood RB, Murphy EJ, Prince PA, Sear CB (in press) Large scale fluctuations in distribution and abundance of krill — a discussion of possible causes. In: Sahrhage D (ed) Antarctic ocean and resources variability
Roe HSJ, Baker A de C, Carson RM, Wild R, Shale DM (1980) Behaviour of the Institute of Oceanographic Sciences rectangular midwater trawls: theoretical aspects and experimental observations. Mar Biol 56:247–259
Sampson RJ (1978) Surface II graphics system number one series on spatial analysis. Kansas Geological Survey Campus West, Lawrence Kansas
Vervoort W (1957) Copepods from Antarctic and sub-Antarctic plankton samples. Rep BANZ Antarct Res Exp Ser B 3:1–160
Vinogradov ME, Tseitlin VB (1983) Deep-sea pelagic domain (aspects of bioenergetics). In: Rowe GT (ed) Deep-sea biology. Wiley, New York Chichester, pp 123–165
Ward P, Robins DB (1987) The reproductive biology of Euchaeta Antarctica Giesbrecht (Copepoda: Calanoida) at South Georgia. J Exp Mar Biol Ecol 108:127–145
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Ward, P., Wood, A.G. The distribution of the Euchaetidae (Copepoda: Calanoida) around South Georgia. Polar Biol 9, 45–52 (1988). https://doi.org/10.1007/BF00441763
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DOI: https://doi.org/10.1007/BF00441763