Results 71 to 80 of about 9,161 (202)

Effect of body size, temperature and starvation on oxygen consumption of antarctic krill Euphausia superba

Brazilian Journal of Oceanography, 1997
Routine oxygen consumption of krill was investigated as a general measure of its metabolism and assesses the effects of body size, temperature and starvation on the metabolism. No significant difference in whole animal consllmption was detected after 1,3,
Phan Van Ngan, Vicente Gomes, Paulo S. M. Carvalho, Maria José de A. C. R. Passos   +3 more
doaj   +1 more source

Seasonally migrating zooplankton strongly enhance Southern Ocean carbon sequestration

Limnology and Oceanography, Volume 70, Issue 8, Page 2208-2222, August 2025.
Abstract High‐latitude zooplankton can sequester millions of tons of carbon due to their seasonal migration from the surface ocean to depth, and their respiration and mortality during overwintering. This seasonal vertical migration pump (SVMP) efficiently removes carbon but not limiting nutrients such as iron from the surface layers.
Guang Yang, Angus Atkinson, Evgeny A. Pakhomov, Katrin Schmidt, Weilei Wang, Jennifer J. Freer, Geraint A. Tarling   +6 more
wiley   +1 more source

Research Bias in Long‐Term Monitoring of Antarctic Nearshore Marine and Terrestrial Biota

Global Change Biology, Volume 31, Issue 8, August 2025.
Antarctic wildlife is under pressure from environmental changes and human activity, but how well is Antarctica's coastal biota being monitored? While over half of the long‐term monitoring studies spanned more than 10 years and/or included environmental data, they were limited in number, mostly focused on penguins and marine mammals, were unevenly ...
Shae L. Jones, Diana H. King, Vonda J. Cummings, Sharon A. Robinson, Melinda J. Waterman   +4 more
wiley   +1 more source

Using Stable Isotopes to Assign Origin of White‐Chinned Petrels Killed by Longline Fisheries

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 35, Issue 7, July 2025.
ABSTRACT Incidental capture (bycatch) of seabirds in longline and trawl fisheries is one of the main threats to many albatrosses and large petrels. The White‐chinned Petrel (Procellaria aequinoctialis) has a circumpolar distribution and is the seabird species killed most frequently by fisheries in the Southern Ocean.
Viviane Barquete, Yves Cherel, Richard A. Phillips, David Thompson, B. Louise Chilvers, Ross M. Wanless, Peter G. Ryan   +6 more
wiley   +1 more source

Nota sobre o transporte de krill (euphausia superba Dana) vivo da antártica para o Brasil Note on the transportation of a live krill (Euphausia superba Dana) from Antartic to Brazil

Brazilian Journal of Oceanography, 1987
É apresentado nesta nota experimento sobre o transporte do krill vivo da Antartica para o Brasil, realizado durante a V Expedição Brasileira à Antártica, verão 1986-1987.
Van Ngan Phan, Maria José de Arruda Campos Rocha Passos, Vicente Gomes, Mario Katsuragawa, Hana Suzuki   +4 more
doaj   +1 more source

How Fragmented Is eDNA? A Case Study on Shark DNA in Tropical Reef Seawater

Environmental DNA, Volume 7, Issue 4, July–August 2025.
This study quantified mitochondrial eDNA fragment lengths in offshore tropical seawater using qPCR assays targeting amplicons from 119 to 15,727 bp in tiger shark (Galeocerdo cuvier). Copy numbers steeply declined with increasing fragment size, with successful amplification up to 1518 bp and a calculated mean undamaged fragment size of 256 bp.
Katrina M. West, Bruce Deagle
wiley   +1 more source

The Biogeochemistry of Natural Climate Solutions Based on Fish, Fisheries, and Marine Mammals: A Review of Current Evidence, Research Needs, and Critical Assessment of Readiness

Global Biogeochemical Cycles, Volume 39, Issue 7, July 2025.
Abstract Several initiatives to conserve, restore or better manage fisheries, fishes, whales, and other marine animals have been proposed as natural climate solutions to sequester carbon from the atmosphere or avoid new emissions. We reviewed the knowledge and uncertainties surrounding carbon fluxes and storage mediated by these organisms to evaluate ...
James R. Collins, Mattias R. Cape, Robert E. Boenish, Claudia R. Benitez‐Nelson, Scott C. Doney, Rod Fujita, Steven D. Gaines, Rebecca L. Gruby, Di Jin, Heather H. Kim, Kristin M. Kleisner, Gaël Mariani, Lisa A. Moore, Andrew J. Pershing, Douglas N. Rader, Joe Roman, Grace K. Saba, James N. Sanchirico, Steven Saul, Matthew S. Savoca, Alexander Waller   +20 more
wiley   +1 more source

The Antarctic krill Euphausia superba shows diurnal cycles of transcription under natural conditions. [PDF]

PLoS ONE, 2013
BACKGROUND: Polar environments are characterized by extreme seasonal changes in day length, light intensity and spectrum, the extent of sea ice during the winter, and food availability.
Cristiano De Pittà, Alberto Biscontin, Alessandro Albiero, Gabriele Sales, Caterina Millino, Gabriella M Mazzotta, Cristiano Bertolucci, Rodolfo Costa   +7 more
doaj   +1 more source

Temporary Absence of Warming in the Northern Weddell Sea Validates Expected Responses of Antarctic Seals to Sea Ice Change

Global Change Biology, Volume 31, Issue 6, June 2025.
We examine Antarctic seal responses to sea ice change using one of the longest population monitoring records of three seal species: Antarctic fur seal, Weddell seal, and southern elephant seal at Signy Island, in the South Orkney Island group. Across five decades from 1977 to 2024, all were significantly affected by temporary changes in their sea‐ice ...
M. J. Dunn, C. M. Waluda, S. Adlard, D. Fox, A. S. Lynnes, T. I. Morley, J. Forcada   +6 more
wiley   +1 more source

Resource potential and maturity estimates of Euphausia superba in East Antarctica

Frontiers in Marine Science
The East Antarctic krill fisheries are spread across two Divisions of the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), Division 58.4.1 between 80-150°E and Division 58.4.2 between 30-80°E.
Dale Maschette, Dale Maschette, Simon Wotherspoon, Hiroto Murase, Nat Kelly, Philippe Ziegler, Kerrie M. Swadling, Kerrie M. Swadling, So Kawaguchi, So Kawaguchi   +9 more
doaj   +1 more source