Krill ( Euphausia superba ) density, proportional and absolute recruitment and biomass in the Elephant Island region (Antarctic Peninsula) during the period 1977 to 1997

Polar Biology ◽  
1998 ◽  
Vol 19 (6) ◽  
pp. 393-398 ◽  
Author(s):  
V. Siegel ◽  
V. Loeb ◽  
J. Gröger
Keyword(s):  
Antarctic Peninsula ◽  
Euphausia Superba ◽  
Island Region ◽  
Elephant Island

scholarly journals The marine epilithic diatom Melosira brandinii sp. nov. (Bacillariophyta) from Elephant Island, Antarctic Peninsula, with comments on some related species

2001 ◽  
Vol 49 (1-2) ◽  
pp. 01-12
Author(s):  
Luciano F. Fernandes ◽  
Roseli M. de Souza-Mosimann
Keyword(s):  
New Species ◽  
Antarctic Peninsula ◽  
Related Species ◽  
Barents Sea ◽  
External Surface ◽  
Southern Brazil ◽  
Mantle Edge ◽  
Epilithic Diatom ◽  
A New Species ◽  
Elephant Island

A new species of epilithic diatom is described from samples collected near Elephant Island, Antarctic Peninsula. The cells of Melosira brandinii sp. nov. are joined in filamentous chains and attached by means of long mucilaginous stalks. The valves are circular with the valvar surface composed of irregularly arranged pentagonal Ioculi. Each loculus bears 6-12 pores on the external surface, opening to the innerside through rotae. The corona is only composed of coarse granules. A mantle is well developed, presenting rimoportulae and bearing coarse granules, which are more concentrated at the mantle edge. Comparisons with the related species Melosira arctica, M. moniliformis and M. nummuloides are made. Additionally, photomicrographs of M. arctica from the type material and Barents Sea, and of M. moniliformis from estuaries of Southern Brazil are included.

Phytoplankton distributions in the Shackleton Fracture Zone/Elephant Island region of the Drake Passage in February–March 2004

2013 ◽  
Vol 90 ◽  
pp. 55-67 ◽  
Author(s):  
Karen E. Selph ◽  
Amy Apprill ◽  
Christopher I. Measures ◽  
Mariko Hatta ◽  
William T. Hiscock ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Drake Passage ◽  
Island Region ◽  
Shackleton Fracture Zone ◽  
Elephant Island

Length and age at maturity of Antarctic krill

1994 ◽  
Vol 6 (4) ◽  
pp. 479-482 ◽  
Author(s):  
V. Siegel ◽  
V. Loeb
Keyword(s):  
Antarctic Peninsula ◽  
Sexual Maturity ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Knife Edge ◽  
Age At Maturity ◽  
Growth Season ◽  
The Third ◽  
Age Class ◽  
The Antarctic

Data from several summer research cruises in the Antarctic Peninsula region were analysed to calculate length (L50) and age at maturity for the Antarctic krill, Euphausia superba. Length at maturity L50 is defined as the length at which 50% of the krill stock attains sexual maturity. L50 values of 34.65–35.91 mm for female krill are the best estimates for the peak spawning season. Males attain sexual maturity later at L50 values of 43.35–43.71 mm. Length at maturity and length at first spawning are identical for krill. Comparisons with mean length-at-age data show that females mature in the third growth season (age class 2+), while males reach maturity in the fourth year (age class 3+). Both sexes show ‘knife-edge maturity’.

Sign in / Sign up

Export Citation Format

Share Document