scholarly journals Ecosystem services of the Southern Ocean: trade-offs in decision-making

2013 ◽  
Vol 25 (5) ◽  
pp. 603-617 ◽  
Author(s):  
Susie M. Grant ◽  
Simeon L. Hill ◽  
Philip N. Trathan ◽  
Eugene J. Murphy
Keyword(s):  
Decision Making ◽  
Ecosystem Services ◽  
Southern Ocean ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Natural Ecosystems ◽  
Lack Of Information ◽  
Trade Offs ◽  
The Status ◽  
The Antarctic

AbstractEcosystem services are the benefits that mankind obtains from natural ecosystems. Here we identify the key services provided by the Southern Ocean. These include provisioning of fishery products, nutrient cycling, climate regulation and the maintenance of biodiversity, with associated cultural and aesthetic benefits. Potential catch limits for Antarctic krill (Euphausia superba Dana) alone are equivalent to 11% of current global marine fisheries landings. We also examine the extent to which decision-making within the Antarctic Treaty System (ATS) considers trade-offs between ecosystem services, using the management of the Antarctic krill fishery as a case study. Management of this fishery considers a three-way trade-off between fisheries performance, the status of the krill stock and that of predator populations. However, there is a paucity of information on how well these components represent other ecosystem services that might be degraded as a result of fishing. There is also a lack of information on how beneficiaries value these ecosystem services. A formal ecosystem assessment would help to address these knowledge gaps. It could also help to harmonize decision-making across the ATS and promote global recognition of Southern Ocean ecosystem services by providing a standard inventory of the relevant ecosystem services and their value to beneficiaries.

Circumpolar occurrence of eugregarinid protozoanCephaloidophora pacificaassociated with Antarctic krill,Euphausia superba

2008 ◽  
Vol 20 (5) ◽  
pp. 437-440 ◽  
Author(s):  
Kunio T. Takahashi ◽  
Masaki Kobayashi ◽  
So Kawaguchi ◽  
Junko Saigusa ◽  
Atsushi Tanimura ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Antarctic Krill ◽  
Geographical Location ◽  
Protozoan Parasite ◽  
Euphausia Superba ◽  
Maturity Stage ◽  
Syowa Station ◽  
Frequency Distributions ◽  
The Mean ◽  
The Antarctic

AbstractThe geographical distribution of protozoan parasiteCephaloidophora pacificaAvdeev (Order Eugregarininda) associated with Antarctic krill,Euphausia superba, was examined in samples collected from the vicinity of the Antarctic Peninsula, near Syowa Station, and Pacific and Indian sectors of the Southern Ocean.Cephaloidophora pacificawas found at all stations around the Antarctic, with 96.4% of the euphausiids infected (n = 195). The numbers ofC. pacificaper krill ranged from 0 to 8089 krill-1, and the average was 350.0 ± 787.8 (mean ± SD). The frequency distributions ofC. pacificashowed an overdispersed parasite population (i.e. the variance was greater than the mean) at all locations. Statistical analysis showed that whilst the geographical location did not have a significant effect on intensity ofC. pacificathe maturity stage of krill did, with an increasing intensity of infection as krill matures. The infestation ofE. superbaby eugregarinid protozoan is considered to be a circum-Antarctic phenomenon, and it occurs equally throughout the Southern Ocean.

Antarctic Krill: a reappraisal of its distribution

Polar Record ◽  
1976 ◽  
Vol 18 (112) ◽  
pp. 15-23 ◽  
Author(s):  
Inigo Everson
Keyword(s):  
Southern Ocean ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Careful Consideration ◽  
International Agreement ◽  
The Past ◽  
The Antarctic ◽  
Potential Exploitation

The past ten years have seen a greatly increased interest in the Antarctic krill Euphausia superba Dana (Fig 1). In particular there have been several Russian expeditions whose main aim has been the evaluation of krill as an exploitable resource (Burukovskiy and Yaragov, 1965) and, more recently, Japanese expeditions have ventured into the Southern Ocean with similaraims (Nemoto and Nasu, 1975). It is obviously vital that international agreement should be reached soon to control this potential exploitation of Southern Ocean fisheries. The problem is at present receiving careful consideration by the SCAR Group of Specialists on Living Resources ofthe Southern Ocean.

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.

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

CCAMLR and its approaches to management of the krill fishery

Polar Record ◽  
1991 ◽  
Vol 27 (162) ◽  
pp. 229-236 ◽  
Author(s):  
Stephen Nicol
Keyword(s):  
Southern Ocean ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Management Plan ◽  
Conservation Measures ◽  
Antarctic Marine ◽  
Central Resource

AbstractThe Commission for the Conservation of Antarctic MarineLiving Resources has met annually since 1982, with the task of implementing the Convention on the Conservation of Antarctic Marine Living Resources; the treaty which was designed to manage rationally the exploitation of resources in the Southern Ocean. The central resource of the region is Antarctic krill (Euphausia superba Dana) and despite nine years of meetings the Commission has yet to adopt any conservation measures to protect krill. This article examines the published work of the Commission, seeking to determine how the Commission has dealt with the krill fishery and why it has not yet developed a krill management plan.

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