Patterns of Fluctuations in the Hydrological Conditions of the Antarctic and Their Effect on the Distribution of Antarctic Krill

1988 ◽  
pp. 209-213 ◽  
Author(s):  
V. V. Maslennikov ◽  
E. V. Solyankin
Keyword(s):  
Antarctic Krill ◽  
Hydrological Conditions ◽  
The Antarctic

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.

scholarly journals Estimation of the feeding record of pregnant Antarctic minke whales (Balaenoptera bonaerensis) using carbon and nitrogen stable isotope analysis of baleen plates

Polar Biology ◽  
2021 ◽  
Vol 44 (3) ◽  
pp. 621-629
Author(s):  
Mayuka Uchida ◽  
Ippei Suzuki ◽  
Keizo Ito ◽  
Mayumi Ishizuka ◽  
Yoshinori Ikenaka ◽  
...  
Keyword(s):  
Growth Rate ◽  
Stable Isotope ◽  
Antarctic Krill ◽  
Isotope Analysis ◽  
Stomach Contents ◽  
Annual Growth Rate ◽  
Pleuragramma Antarcticum ◽  
Minke Whales ◽  
Balaenoptera Bonaerensis ◽  
The Antarctic

AbstractAntarctic minke whales (Balaenoptera bonaerensis) are migratory capital breeders that experience intensive summer feeding on Antarctic krill (Euphausia superba) in the Southern Ocean and winter breeding at lower latitudes, but their prey outside of the Antarctic is unknown. Stable isotope analyses were conducted on δ13C and δ15N from the baleen plates of ten pregnant Antarctic minke whales to understand the growth rate of the baleen plate and their diet in lower latitudes. Two to three oscillations along the length of the edge of the baleen plate were observed in δ15N, and the annual growth rate was estimated to be 75.2 ± 20.4 mm, with a small amplitude (0.97 ± 0.21 ‰). Bayesian stable isotope mixing models were used to understand the dominant prey that contributed to the isotopic component of the baleen plate using Antarctic krill from the stomach contents and reported values of Antarctic coastal krill (Euphausia crystallorophias), Antarctic silver fish (Pleuragramma antarcticum), Australian krill spp., and Australian pelagic fish spp.. The models showed that the diet composition of the most recent three records from the base of the baleen plates (model 1) and the highest δ15N values in each baleen plate (model 2) were predominantly Antarctic krill, with a contribution rate of approximately 80%. The rates were approximately 10% for Antarctic coastal krill and less than 2.0% for the two Australian prey groups in both models. These results suggest that pregnant Antarctic minke whales did not feed on enough prey outside of the Antarctic to change the stable isotope values in their baleen plates.

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

scholarly journals Gone with the currents: lack of genetic differentiation at the circum-continental scale in the Antarctic krill Euphausia superba

BMC Genetics ◽  
2011 ◽  
Vol 12 (1) ◽  
pp. 32 ◽  
Author(s):  
Erica Bortolotto ◽  
Ann Bucklin ◽  
Massimo Mezzavilla ◽  
Lorenzo Zane ◽  
Tomaso Patarnello
Keyword(s):  
Genetic Differentiation ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Continental Scale ◽  
The Antarctic ◽  
Antarctic Krill Euphausia Superba

De novo sequencing of the Antarctic krill (Euphausia superba) transcriptome to identify functional genes and molecular markers

2018 ◽  
Vol 97 (4) ◽  
pp. 995-999
Author(s):  
Chunyan Ma ◽  
Hongyu Ma ◽  
Guodong Xu ◽  
Chunlei Feng ◽  
Lingbo Ma ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Antarctic Krill ◽  
De Novo ◽  
Euphausia Superba ◽  
De Novo Sequencing ◽  
Functional Genes ◽  
The Antarctic ◽  
Antarctic Krill Euphausia Superba
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