Results 111 to 120 of about 540 (163)

Iron metabolism genes in Antarctic notothenioids: A review

Marine Genomics, 2008
Iron is an essential element for metabolic processes intrinsic to life, but the properties that make iron a necessity also make it potentially deleterious. To avoid harm, iron homeostasis is achieved through iron transport, storage and regulatory proteins. The functions of some of these molecules are well described, for example transferrin and ferritin,
SCUDIERO, ROSARIA, Trinchella F., Parisi E.   +2 more
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Buoyancy of sub-Antarctic notothenioids including the sister lineage of all other notothenioids (Bovichtidae)

Polar Biology, 2011
The radiation of notothenioid fishes (Perciformes) in Antarctic waters was likely the result of an absence of competition in the isolated Antarctic waters and key traits such as the production of antifreeze glycoprotein and buoyancy modifications. Although notothenioids lack a swim bladder, the buoyancy of Antarctic species, ranging from neutrally ...
Fernandez, Daniel Alfredo, Ceballos, Santiago Guillermo, Malanga, Gabriela Fabiana, Boy, Claudia Clementina, Vanella, Fabián Alberto   +4 more
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In search of notothenioid (Teleostei) relatives

Antarctic Science, 2004
Ninety-five percent of the fish species known from the Antarctic continental shelf and upper slope are acanthomorphs, i.e. spiny teleosteans. Notothenioids (suborder Notothenioidei) are acanthomorphs and so is their sister group. Unfortunately, until recently acanthomorph intra-relationships were so poorly known that it was necessary to sample all of ...
AGNÈS DETTAÏ, GUILLAUME LECOINTRE
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The Sensory Biology of Notothenioid Fish

1991
The antarctic marine environment is notable not only for its low temperature, but also for the light levels which occur under areas of ice cover, and during the polar winter. Within the confines of this environment has evolved a unique assemblage of fish.
J. A. Macdonald, J. C. Montgomery
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Periventricular morphology in the diencephalon of antarctic notothenioid teleosts

Journal of Comparative Neurology, 1995
AbstractWe have examined the subependymal region of the diencephalic third ventricle in notothenioid perciforms and report a pattern of neuropil expansions that appears to be phyletically derived for notothenioids and their outgroups but that is otherwise unique among vertebrates.
M J, Lannoo, J T, Eastman
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Total Mercury in Six Antarctic Notothenioid Fishes

Bulletin of Environmental Contamination and Toxicology, 2015
We analyzed white muscle samples from six species of Antarctic fish (suborder Notothenioidei) collected in 2011 from McMurdo Sound, Ross Sea, Antarctica, to assess levels of total mercury (THg). Gymnodraco acuticeps and Trematomus bernacchii exhibited the highest concentrations of THg followed by Trematomus pennellii, Trematomus nicolai, Trematomus ...
Nathan J P, Wintle, Isaac M, Sleadd, Deke T, Gundersen, Kristina, Kohl, Bradley A, Buckley   +4 more
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Recent origin of sub-Antarctic notothenioids

Polar Biology, 2002
Comparison of partial mitochondrial 12S and 16S rDNA sequences from non-Antarctic notothenioid fishes – an icefish Champsocephalus esox and two members of the genus Patagonotothen – and their sister species from the Southern Ocean suggests that their divergence took place 1.7 and 6.6–7 million years ago, respectively, i.e. much later than the formation
A. Stankovic, K. Spalik, E. Kamler, P. Borsuk, P. Weglenski   +4 more
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Reproduction in Antarctic notothenioid fish

Antarctic Science, 1991
Gonad maturation in Antarctic notothenioid fish is a biennial process although spawning is likely to take place annually. However, part of the populations of Champsocephalus gunnari in the Atlantic Ocean sector do not spawn each year. Gonadosomatic index (GSI) of females is 15–40% at spawning. Apart from a few nototheniid species of the GSI of males is
Karl-Hermann Kock, Adolf Kellermann
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Molecular phylogenetics and the evolution of Antarctic notothenioid fishes

Comparative Biochemistry and Physiology Part A: Physiology, 1997
The monophyly of the antarctic fish suborder Notothenioidei and the monophyly of its earliest family the Bovichtidae have been investigated with 12S and 16S mitochondrial DNA sequences. New data from Cottoperca, Pseudaphritis, Harpagifer and several outgroups, in addition to available sequences, show that the bovichtids are paraphyletic.
P A, Ritchie, S, Lavoué, G, Lecointre
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Notothenioid fishes (Notothenioidei)

2009
Abstract Notothenioids represent an adaptive radiation of teleost Ashes in the frigid waters of the Southern Ocean surrounding Antarctica (1). Of the 129 recognized species, 101 are found in marine costal habitats of Antarctica (Fig. 1), and the remaining species are distributed along costal areas of southern South America, the Falkland ...
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