Thermal and saline tolerance of Antarctic krill Euphausia superba under controlled in-situ aquarium conditions

2019 ◽  
Vol 37 (3) ◽  
pp. 1080-1089 ◽  
Author(s):  
Guoping Zhu ◽  
Zijun Liu ◽  
Yang Yang ◽  
Zhen Wang ◽  
Wenjie Yang ◽  
...  
Keyword(s):  
Antarctic Krill ◽  
Euphausia Superba ◽  
Saline Tolerance ◽  
Antarctic Krill Euphausia Superba

Observation on behaviours of Antarctic krill (Euphausia superba) in lighting condition

2012 ◽  
Vol 36 (2) ◽  
pp. 300
Author(s):  
Peng-xiang XU ◽  
Ying-chun LI ◽  
Guo-ping ZHU ◽  
Hui XIA ◽  
Liu-xiong XU
Keyword(s):  
Antarctic Krill ◽  
Euphausia Superba ◽  
Lighting Condition ◽  
Antarctic Krill Euphausia Superba

scholarly journals Experimental determination of reflectance spectra of Antarctic krill (Euphausia superba) in the Scotia Sea

2021 ◽  
pp. 1-13
Author(s):  
Anna Belcher ◽  
Sophie Fielding ◽  
Andrew Gray ◽  
Lauren Biermann ◽  
Gabriele Stowasser ◽  
...  
Keyword(s):  
Antarctic Krill ◽  
Euphausia Superba ◽  
Reflectance Spectra ◽  
Spectral Signature ◽  
Absorption Feature ◽  
Scotia Sea ◽  
Surface Ocean ◽  
Measuring Surface ◽  
Ground Truthing

Abstract Antarctic krill are the dominant metazoan in the Southern Ocean in terms of biomass; however, their wide and patchy distribution means that estimates of their biomass are still uncertain. Most currently employed methods do not sample the upper surface layers, yet historical records indicate that large surface swarms can change the water colour. Ocean colour satellites are able to measure the surface ocean synoptically and should theoretically provide a means for detecting and measuring surface krill swarms. Before we can assess the feasibility of remote detection, more must be known about the reflectance spectra of krill. Here, we measure the reflectance spectral signature of Antarctic krill collected in situ from the Scotia Sea and compare it to that of in situ water. Using a spectroradiometer, we measure a strong absorption feature between 500 and 550 nm, which corresponds to the pigment astaxanthin, and high reflectance in the 600–700 nm range due to the krill's red colouration. We find that the spectra of seawater containing krill is significantly different from seawater only. We conclude that it is tractable to detect high-density swarms of krill remotely using platforms such as optical satellites and unmanned aerial vehicles, and further steps to carry out ground-truthing campaigns are now warranted.

Observations on moulting in Antarctic Krill (Euphausia superba Dana)

1982 ◽  
Vol 33 (1) ◽  
pp. 71 ◽  
Author(s):  
T Ikeda ◽  
P Dixon
Keyword(s):  
Phaeodactylum Tricornutum ◽  
Antarctic Krill ◽  
Dry Weight ◽  
Euphausia Superba ◽  
Dunaliella Tertiolecta ◽  
Antarctic Ocean ◽  
Fish Food ◽  
Antarctic Waters ◽  
The Antarctic ◽  
Antarctic Krill Euphausia Superba

Live E. superba were transported from Antarctic waters to a tropical laboratory where observations at the temperature of -0.5�C (0 to - 1.0�C), were made of intermoult period of specimens fed a mixture of microalgae (Dunaliella tertiolecta and Phaeodactylum tricornutum) or artificial pet fish food or starved. Mean intermoult period was 26.4-27.1 days for fed specimens and 29.6 days for starved specimens, with no relation to the size of specimens. The moult accounted for a loss of 2.63-4.35% of animal dry weight, which is equivalent to 1.1-1.8% of animal nitrogen or 1.4-2.3% of animal carbon. The contribution of moults to detritus in the Antarctic Ocean was estimated as 0.11 g C m-2 per year.

Altered developmental timing in early life stages of Antarctic krill (Euphausia superba) exposed to p,p′-DDE

2011 ◽  
Vol 409 (24) ◽  
pp. 5268-5276 ◽  
Author(s):  
Anita H. Poulsen ◽  
So Kawaguchi ◽  
Matti T. Leppänen ◽  
Jussi V.K. Kukkonen ◽  
Susan M. Bengtson Nash
Keyword(s):  
Early Life ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Developmental Timing ◽  
Life Stages ◽  
Early Life Stages ◽  
Antarctic Krill Euphausia Superba

Ultrastructure of the Fertilized Egg of the Antarctic Krill Euphausia Superba

1985 ◽  
Vol 5 (3) ◽  
pp. 430-438 ◽  
Author(s):  
R. M. Dillaman ◽  
R. Y. George ◽  
J.-O. Strömberg
Keyword(s):  
Antarctic Krill ◽  
Euphausia Superba ◽  
The Antarctic ◽  
Fertilized Egg ◽  
Antarctic Krill Euphausia Superba
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