Some aspects of the small scale distribution of Euphausia crystallorophias

Everson, Inigo. 1987 Some aspects of the small scale distribution of Euphausia crystallorophias. Polar Biology, 8 (1). 9-15. 10.1007/BF00297158

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Official URL: http://dx.doi.org/10.1007/BF00297158

Abstract/Summary

Diurnal variations in the vertical distribution and swarming behaviour of Euphausia crystallorophias at Deception Island (61 degrees South, 66 degrees West) are described. Swarms were present at all times of the day and night. By day swarms were compact and deep, they were dispersed and neared to the surface by night. Significant net avoidance was noted by day. A twenty-fold discrepancy was found between abundance estimated from net hauls and acoustics. This difference is almost certainly because currently used Target Strength (TS) to size relationships overestimate TS and consequently undersetimate euphausiid biomass.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1007/BF00297158
ISSN:	0722-4060
Additional Keywords:	biomass, vertical distribution, diurnal variation, acoustics
Date made live:	28 Mar 2019 11:35 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/522713

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1007/BF00297158

ISSN:

0722-4060

Additional Keywords:

biomass, vertical distribution, diurnal variation, acoustics

Date made live:

28 Mar 2019 11:35 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/522713