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

Natural growth rates in Antarctic krill (Euphausia superba): I. Improving methodology and predicting intermolt period

2006 ◽  
Vol 51 (2) ◽  
pp. 959-972 ◽  
Author(s):  
Geraint A. Tarling ◽  
Rachael S. Shreeve ◽  
Andrew G. Hirst ◽  
Angus Atkinson ◽  
Dave W. Pond ◽  
...  
Keyword(s):  
Growth Rates ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Natural Growth ◽  
Intermolt Period ◽  
Antarctic Krill Euphausia Superba

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.

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