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DIRECT OBSERVATIONS OF THE BEHAVIOR OF EUPHAUSIA SUPERBA AND EUPHAUSIA CRYSTALLOROPHIAS (CRUSTACEA: EUPHAUSIACEA) UNDER PACK ICE DURING THE ANTARCTIC SPRING OF 1985

DIRECT OBSERVATIONS OF THE BEHAVIOR OF EUPHAUSIA SUPERBA AND EUPHAUSIA CRYSTALLOROPHIAS... Documented evidence of in situ observations (using SCUBA) of Euphausia superba is scarce, with most references applying to studies of the large swarms that occur during the Antarctic summer (Pavlov, 1969; Ragulin, 1969; Hamner, 1982; Hamner et al., 1983). Only Spiridonov et al. (1985) report observations of Antarctic krill under the ice. Furthermore, underwater observations of the Eu- phausiidae as a whole extend only to studies of "seasonal" large surface swarms of coastal species such as Euphausia pacifica, Nyctiphanes australis, and Nycti- phanes capensis (Fenwick, 1978; Hanamura et al., 1984; O'Brien et al., 1986). Ragulin (1969) and Antezana and Ray (1983) also report SCUBA observations of Euphausia vallentini south of the Falkland Islands and in Chilean fjords, re- spectively. This study is the first to present underwater observations of Euphausia crystallorophias. Recent results from the use of remote underwater camera systems (e.g., Kils, 1979; Guzman and Marin, 1982) have given some indication of the general swimming pattern, the form of the avoidance response, and the extent of polar- ization within swarms. However, there is evidence of active avoidance of these camera systems by the krill (I. Everson, personal communication). Acoustic and trawl sampling methods are unsuitable for use http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Crustacean Biology Brill

DIRECT OBSERVATIONS OF THE BEHAVIOR OF EUPHAUSIA SUPERBA AND EUPHAUSIA CRYSTALLOROPHIAS (CRUSTACEA: EUPHAUSIACEA) UNDER PACK ICE DURING THE ANTARCTIC SPRING OF 1985

O’Brien, D. P.
Journal of Crustacean Biology , Volume 7 (3): 437 – Jan 1, 1987
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Publisher
Brill
Copyright
Copyright 1987 by Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0278-0372
eISSN
1937-240X
DOI
10.1163/193724087X00045
Publisher site
See Article on Publisher Site

Abstract

Documented evidence of in situ observations (using SCUBA) of Euphausia superba is scarce, with most references applying to studies of the large swarms that occur during the Antarctic summer (Pavlov, 1969; Ragulin, 1969; Hamner, 1982; Hamner et al., 1983). Only Spiridonov et al. (1985) report observations of Antarctic krill under the ice. Furthermore, underwater observations of the Eu- phausiidae as a whole extend only to studies of "seasonal" large surface swarms of coastal species such as Euphausia pacifica, Nyctiphanes australis, and Nycti- phanes capensis (Fenwick, 1978; Hanamura et al., 1984; O'Brien et al., 1986). Ragulin (1969) and Antezana and Ray (1983) also report SCUBA observations of Euphausia vallentini south of the Falkland Islands and in Chilean fjords, re- spectively. This study is the first to present underwater observations of Euphausia crystallorophias. Recent results from the use of remote underwater camera systems (e.g., Kils, 1979; Guzman and Marin, 1982) have given some indication of the general swimming pattern, the form of the avoidance response, and the extent of polar- ization within swarms. However, there is evidence of active avoidance of these camera systems by the krill (I. Everson, personal communication). Acoustic and trawl sampling methods are unsuitable for use

Journal

Journal of Crustacean Biology – Brill

Published: Jan 1, 1987

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