scholarly journals Using the relationship between eye diameter and body length to detect the effects of long-term starvation on Antarctic krill Euphausia superba

2002 ◽  
Vol 239 ◽  
pp. 157-167 ◽  
Author(s):  
HC Shin ◽  
S Nicol
Keyword(s):  
Body Length ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Eye Diameter ◽  
The Relationship ◽  
Antarctic Krill Euphausia Superba

Demography and life cycle of Antarctic krill, Euphausia superba, in the Indian sector of the Southern Ocean: long-term comparison between coastal and open-ocean regions

2000 ◽  
Vol 57 (S3) ◽  
pp. 68-90 ◽  
Author(s):  
E A Pakhomov
Keyword(s):  
Southern Ocean ◽  
Life Span ◽  
Antarctic Krill ◽  
Age Groups ◽  
Substantial Reduction ◽  
Euphausia Superba ◽  
Age Composition ◽  
Indian Sector ◽  
Antarctic Krill Euphausia Superba

Size/age composition and reproductive status of Antarctic krill, Euphausia superba, in the central part of the Indian sector of the Southern Ocean, e.g., the Cooperation Sea (Prydz Bay region) and the Cosmonaut Sea, during austral summers 1977-1990 were summarized to estimate growth rates, longevity, reproduction, recruitment, life span, and mortality rates. The life span of Antarctic krill exceeds 5 years in both the Cosmonaut and Cooperation seas. The age composition of the southern and northern groupings differs markedly, with substantial reduction in numbers of early age groups in the northern grouping. Long-term observations of spawning success, recruitment, and age composition suggest that a self-sustained grouping of krill persists in the Cooperation Sea south of the Antarctic Divergence. However, periodic gene flow via recruits from surrounding regions most probably accounts for the lack of spatial genetic differences between the Cooperation Sea and adjacent areas, thus preventing the establishment of an isolated subpopulation in the region investigated. The major factor responsible for the substantial interannual variability in krill dynamics appears to be macroscale oceanographic and atmospheric circulations, which determine a level of environmental isolation of the Cooperation Sea from adjacent waters.

Fecundity and ovarian cycles of the Antarctic krill Euphausia superba (Crustacea, Euphausiacea)

1982 ◽  
Vol 60 (10) ◽  
pp. 2414-2423 ◽  
Author(s):  
C. J. Denys ◽  
M. A. McWhinnie
Keyword(s):  
Body Length ◽  
Brood Size ◽  
Antarctic Krill ◽  
Sequential Sampling ◽  
Euphausia Superba ◽  
Time Sequence ◽  
Reproductive Diapause ◽  
The Antarctic ◽  
Antarctic Krill Euphausia Superba ◽  
Ovarian Cycles

The fecundity and ovarian cycles of Euphausia superba were studied using three approaches: (i) counting ovarian eggs at several stages of maturity; (ii) counting eggs spawned by individual animals in the laboratory; and (iii) observing the time sequence of ovarian changes by sequential sampling of a laboratory-maintained population. Ovarian egg counts show that the number of eggs per female is directly proportional to body length and inversely proportional to the stage of maturity. Observations of laboratory-maintained animals indicate that spawning is biphasic, occurring in two closely spaced bursts. Maximum total yearly brood size for females 30–50 mm in length is estimated to be approximately 2200–8800 eggs and is directly proportional to body length. After spawning is complete, the ovary reorganizes and reverts to a juvenile appearance within 6 weeks. Reorganization is followed by a prolonged reproductive diapause.

scholarly journals Physiological response of adult Antarctic krill, Euphausia superba, to long-term starvation

Polar Biology ◽  
2015 ◽  
Vol 38 (6) ◽  
pp. 763-780 ◽  
Author(s):  
Lutz Auerswald ◽  
Bettina Meyer ◽  
Mathias Teschke ◽  
Wilhelm Hagen ◽  
So Kawaguchi
Keyword(s):  
Physiological Response ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Antarctic Krill Euphausia Superba

Food-grade emulsions stabilized by marine Antarctic krill (Euphausia superba) proteins with long-term physico-chemical stability

LWT ◽  
2020 ◽  
Vol 128 ◽  
pp. 109492 ◽  
Author(s):  
Yufeng Li ◽  
Qiao-Hui Zeng ◽  
Guang Liu ◽  
Xiaowei Chen ◽  
Yongheng Zhu ◽  
...  
Keyword(s):  
Chemical Stability ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Food Grade ◽  
Physico Chemical ◽  
Antarctic Krill Euphausia Superba

Natural growth rates in Antarctic krill (Euphausia superba): II. Predictive models based on food, temperature, body length, sex, and maturity stage

2006 ◽  
Vol 51 (2) ◽  
pp. 973-987 ◽  
Author(s):  
Angus Atkinson ◽  
Rachael S. Shreeve ◽  
Andrew G. Hirst ◽  
Peter Rothery ◽  
Geraint A. Tarling ◽  
...  
Keyword(s):  
Body Length ◽  
Growth Rates ◽  
Predictive Models ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Maturity Stage ◽  
Natural Growth ◽  
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

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.

Sign in / Sign up

Export Citation Format

Share Document