Results 41 to 50 of about 540 (163)

Divergent exploratory‐avoidant behavioural strategies may drive niche differentiation in juvenile Antarctic fishes

Journal of Fish Biology, EarlyView.
Abstract We used an ecological niche theory framework integrating physiological and behavioural ecology to understand interspecific differentiation of juveniles of four Antarctic fishes: Trematomus bernacchii, Trematomus pennellii, Trematomus nicolai and Pagothenia borchgrevinki.
Amanda J. Frazier, Andrew W. Naslund, Milica Mandic, Kenneth W. Zillig, Bryant C. Siu, Anne E. Todgham   +5 more
wiley   +1 more source

Modified fin morphology in mackerel icefish (Champsocephalus gunnari) may indicate nesting behaviour

Journal of Fish Biology, EarlyView.
Abstract Monitoring reproductive traits in Southern Ocean species is challenging. Males in some channichthyids thicken the epithelium along their anal fins to aid nest construction. This study presents initial evidence that the only commercially harvested channichthyid, mackerel icefish (Champsocephalus gunnari), exhibits modifications to their anal ...
Huw W. James, Fabrice Stephenson, Martin A. Collins, Simeon L. Hill, William D. K. Reid   +4 more
wiley   +1 more source

Organelle genome evolution in the early‐diverging brown algal lineage, Ishigeales

Journal of Phycology, Volume 62, Issue 3, Page 1090-1107, June 2026.
Abstract The order Ishigeales is an early‐diverging lineage of brown algae that exhibits remarkable morphological diversity ranging from simple filamentous forms to robust terete and foliose thalli, which may reflect complex evolutionary histories in their organelle genomes.
Hayeon Hwang, Hocheol Kim, Seok‐Wan Choi, Hiroshi Kawai, Hwan Su Yoon   +4 more
wiley   +1 more source

Marine trophic architecture and hidden ecological connections in the Strait of Magellan: keystone species and ecosystem resilience

Oikos, Volume 2026, Issue 4, April 2026.
Understanding the ecological implications of species coexistence is central to biodiversity studies and to identify environmental and anthropogenic drivers of ecosystem dynamics, where ecological network analysis offers valuable insights. This study examines the complexity, structure, and potential responses to disturbances of the Strait of Magellan's ...
Claudia D. Andrade, Taryn Sepúlveda, Cristóbal Rivera, Cristian Aldea, Tomás I. Marina   +4 more
wiley   +1 more source

Projected Warming of the Southern Ocean Disrupts Embryonic Development and Hatch Timing in Antarctic Fish

Global Change Biology Communications, Volume 1, Issue 1, March 2026.
Embryos are particularly sensitive to thermal challenge. Antarctic fish embryos raised at projected Southern Ocean temperatures hatch during the winter, have a high incidence of morphological abnormalities, have shorter body lengths, and express genes indicative of cellular stress.
Margaret Streeter, Nathalie R. Le François, Thomas Desvignes, Jacob Grondin, John H. Postlethwait, H. William Detrich III, Jacob M. Daane   +6 more
wiley   +1 more source

Phylogenomics of an extra-Antarctic notothenioid radiation reveals a previously unrecognized lineage and diffuse species boundaries

BMC Evolutionary Biology, 2019
Background The impressive adaptive radiation of notothenioid fishes in Antarctic waters is generally thought to have been facilitated by an evolutionary key innovation, antifreeze glycoproteins, permitting the rapid evolution of more than 120 species ...
Santiago G. Ceballos, Marius Roesti, Michael Matschiner, Daniel A. Fernández, Malte Damerau, Reinhold Hanel, Walter Salzburger   +6 more
doaj   +1 more source

Warm Edge Kelp Populations Show Elevated Volatility to Marine Heatwaves

Ecology Letters, Volume 29, Issue 1, January 2026.
Limited data on how heat stress affects species across their distribution restricts prediction accuracy. Our long‐term reef observational data supports a hybrid thermal performance model, whereby thermal limits differ between populations, but performance volatility increases toward species' warm‐edge, heightening vulnerability of warm‐edge populations.
Jiaxin Shi, Scott Bennett, Jules B. Kajtar, Thomas Wernberg, Neville S. Barrett, Graham J. Edgar, Neil J. Holbrook   +6 more
wiley   +1 more source

Cold Fusion: Massive Karyotype Evolution in the Antarctic Bullhead Notothen Notothenia coriiceps

G3: Genes, Genomes, Genetics, 2017
Half of all vertebrate species share a series of chromosome fusions that preceded the teleost genome duplication (TGD), but we do not understand the causative evolutionary mechanisms.
Angel Amores, Catherine A. Wilson, Corey A. H. Allard, H. William Detrich, III, John H. Postlethwait   +4 more
doaj   +1 more source

Are Sponges Good Natural Sentinels for Monitoring Fish Diversity in Antarctic Coastal Waters?

Ecology and Evolution, Volume 15, Issue 12, December 2025.
This study demonstrates that eDNA metabarcoding using both water and sponge samples is an effective tool for monitoring fish biodiversity along the Western Antarctic Peninsula. The results revealed 14 endemic Antarctic fish species and one marine mammal, with water samples often offering a more comprehensive view than sponges.
Carlos Angulo‐Preckler, Marta Turon, Oriol Sacristan‐Soriano, Kim Præbel, Conxita Avila, Owen Simon Wangensteen   +5 more
wiley   +1 more source

Lifestyle and Ice: The Relationship between Ecological Specialization and Response to Pleistocene Climate Change. [PDF]

PLoS ONE, 2015
Major climatic changes in the Pleistocene had significant effects on marine organisms and the environments in which they lived. The presence of divergent patterns of demographic history even among phylogenetically closely-related species sharing climatic
Eva Kašparová, Anton P Van de Putte, Craig Marshall, Karel Janko   +3 more
doaj   +1 more source