Results 41 to 50 of about 9,575 (206)

Genetic differentiation in the Antarctic coastal krill Euphausia crystallorophias [PDF]

Heredity, 2002
The population genetics of the Antarctic neritic krill species Euphausia crystallorophias was examined by nucleotide sequence variation in its mitochondrial DNA. A 616 base pair region of the cytochrome c oxidase subunit I (COI) gene was screened for mutations by single-strand conformational polymorphism (SSCP) combined with restriction digestion.
Simon N, Jarman, N G, Elliott, S, Nicol, A, McMinn   +3 more
openaire   +2 more sources

Phytogenic food of Euphausia superba Dana caught in the southern Drake Passage and the Bransfield Strait, February—March 1981 (BIOMASS-FIBEX) [PDF]

, 1982
These studies were carried out on board of the r/v "Profesor Siedlecki" within the Programme MR-I-29A of the Polish Academy of Sciences, during the Antarctic Expedition headed by Dr. S. Rakusa-Suszczewski.
Ligowski, Ryszard
core  

Semi‐automated seal detection on the Western Antarctic Peninsula: an unsupervised machine learning approach for detecting ice seals in aerial survey data

Remote Sensing in Ecology and Conservation, EarlyView.
This study presents a semi‐automated, rule‐based image analysis pipeline to detect ice seals in aerial surveys of the Western Antarctic Peninsula during an unusually low sea ice year. By using simple hierarchical clustering instead of deep learning, the method substantially reduced human annotation effort while achieving 82% recall, identifying 758 ...
Claire McGinnity, Connor C.G. Bamford, Nathan Fenney, Andrew Fleming, Jaume Forcada, Michael S. Tift, Luis A. Hückstädt, Daniel P. Costa, Peter T. Fretwell   +8 more
wiley   +1 more source

A study on the multi-frequency acoustic target strength of krill using a stochastic distorted-wave born approximation (SDWBA) model

Fisheries and Aquatic Sciences
We examined the dB difference in target strength at multiple frequencies (ΔTS) for the identification of Antarctic krill (Euphausia superba) and ice krill (Euphausia crystallorophias) using a stochastic distorted-wave Born approximation model.
Wuju Son, Wooseok Oh, Hyoung Sul La, Kyounghoon Lee   +3 more
doaj   +1 more source

Zooplankton biomass in the ice-covered Weddell Sea, Antarctica [PDF]

, 1991
Zooplankton was sampled by a Rectangular Midwater Trawl (RMT 1 + 8) in Weddell Sea surface waters (0 to 300 m) between 66 and 78°S during austral summer (February – March 1983). Sixty-nine taxa including different developmental stages were considered and
Boysen-Ennen, E., Hagen, W., Hubold, G., Piatkowski, Uwe   +3 more
core   +1 more source

Rhyming in the cold: first evidence of soniferous fishes in the Southern Ocean

Remote Sensing in Ecology and Conservation, EarlyView.
The acoustic ecology of Southern Ocean fishes remains unknown due to a lack of dedicated acoustic research on the fishes of this ocean. Passive acoustic monitoring data were collected at the South African sub‐Antarctic Prince Edward Islands using an underwater acoustic recorder, and towed underwater Ski‐Monkey cameras were deployed to identify fish ...
Fannie W. Shabangu, Grant van der Heever, Charles von der Meden, Hannah Truter, Stephen J. Lamberth, Ofer Gon   +5 more
wiley   +1 more source

Feeding Ecology of Three Euphausiid Species in the North Pacific Ocean Inferred From 18S V9 Metabarcoding and Stable Isotope Analysis

Frontiers in Marine Science, 2021
Euphausiids are abundant micronekton and important links between higher and lower trophic levels in marine ecosystems; however, their detailed diets cannot be fully understood by conventional microscopy, especially in subtropical areas.
Fanyu Zhou, Junya Hirai, Koji Hamasaki, Sachiko Horii, Atsushi Tsuda   +4 more
doaj   +1 more source

Life in a warm deep sea: routine activity and burst swimming performance of the shrimp Acanthephyra eximia in the abyssal Mediterranean [PDF]

, 2005
Measurements of routine swimming speed, "tail-flip'' escape responses, and oxygen consumptions were made of the deep-sea shrimp Acanthephyra eximia using autonomous landers in the Rhodos Basin at depths of up to 4,400 m and temperatures of 13 - 14.5 ...
Angilletta, Arnott, Bailey, Bailey, Britton, Carrass, Carrass, Cartes, Childress, Christiansen, Collins, Company, Cowles, Desbruy, Fraser, Galil, God, Goldspink, Guderley, Heilmayer, Hs, James, Johnson, Johnston, Johnston, Johnston, Jones, Kaartvedt, Kils, Laver, Lindstr, Morton, Nauen, O, P, Peck, Polunin, Priede, Priede, Psarra, Ravaux, Rome, Shillito, Smith, Smith, Somero, Temple, Torres, Van, Wakeling, Webb   +50 more
core   +1 more source

Nanomaterials' Multigenerational Effects by Single and Joint Exposure in Non‐mammalian Models

Environmental Toxicology, EarlyView.
ABSTRACT Nanotoxicology has mainly focused on single‐generation studies, leaving multigenerational toxicity underexplored. Having animal welfare recently gained importance, we aimed to provide the state‐of‐the‐art of knowledge about multigenerational effects in non‐mammalian models in the case of nanomaterials (NM) single and joint exposure to other ...
Andy Joel Taipe Huisa, Analía Ale, Azael Francisco Silva Neto, Lorena De Mendonça Lucena, Marcelo Estrella Josende, Milena Ferreira de Lima, Rhayanny Kethylly Pereira Santos, Martín Federico Desimone, Priscila Gubert, José María Monserrat   +9 more
wiley   +1 more source

Amphipod crustaceans in the diet of pygoscelid penguins of the King George Island, South Shetland Islands, Antarctica [PDF]

, 1981
Paper received 10 December 1980.Information is presented concerning amphipod crustaceans eaten by three penguin species breeding on King George Island: Pygoscelis adeliae, P. antarctica and P. papua.
Jażdżewski, Krzysztof
core