Results 111 to 120 of about 16,657 (258)

Plausible Last Interglacial Antarctic Ice Sheet Changes Do Not Fully Explain Antarctic Ice Core Water Isotope Records

Geophysical Research Letters
Antarctic ice cores can help determine ice mass loss from the Antarctic Ice Sheet (AIS) during past warm periods. We compile Last Interglacial (LIG) δ18O measurements from eight Antarctic cores and compare these to new isotope‐enabled LIG simulations ...
Huiling Zou, Louise C. Sime, Nancy A. N. Bertler, Elizabeth D. Keller, Eric W. Wolff   +4 more
doaj   +1 more source

Distribution and ecology of the four Macrourus species by‐caught in the longline fishery at South Georgia, Southern Ocean

Journal of Fish Biology, EarlyView.
Abstract Although Macrourus species are the main by‐catch across Southern Ocean longline fisheries, including around South Georgia, the lack of species‐specific data has hindered effective management and ecological understanding. Aggregation of macrourids at genus level masks critical interspecific differences in life‐history strategies and ...
José Abreu, Philip R. Hollyman, Jennifer J. Freer, M. L. Romero Martínez, José P. Queirós, Timothy Jones, Richard A. Phillips, José C. Xavier, Martin A. Collins   +8 more
wiley   +1 more source

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

Estimating Patagonian toothfish (Dissostichus eleginoides) length at first maturity from their age, sex and temperature experience around South Georgia

Journal of Fish Biology, EarlyView.
Abstract Patagonian toothfish (Dissostichus eleginoides) are a long‐lived, slow‐growing deep‐sea species endemic to the Southern Hemisphere and the focus of longline fisheries managed to ensure sustainable exploitation. Managing the fisheries relies on accurate stock assessments that include pertinent biological and exploitation processes.
Jessica E. Marsh, Sarah R. Alewijnse, Stephen D. Gregory, Philip R. Hollyman, Marta Söffker   +4 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

DNA barcoding reveals the presence of Whitson's grenadier, Macrourus whitsoni, in sub‐Antarctic waters of South Georgia, Southern Ocean

Journal of Fish Biology, EarlyView.
Abstract Macrourid species constitute the main bycatch in Southern Ocean toothfish longline fisheries. We report the first confirmed record of Whitson's grenadier, Macrourus whitsoni, in the South Georgia toothfish fishery. Mitochondrial cox1 DNA barcoding confirmed its presence in bycatch samples collected around South Georgia and the northern South ...
M. L. Romero Martínez, J. Abreu, J. P. Queirós, J. C. Xavier, P. R. Hollyman, E. Fitzcharles, M. A. Collins   +6 more
wiley   +1 more source

Biofluorescence in polar zoarcid eelpouts: The Arctic eelpout Lycodes reticulatus (Reinhardt, 1835) and the Antarctic eelpout Pachycara brachycephalum (Pappenheim, 1912)

Journal of Fish Biology, EarlyView.
Abstract Biofluorescence is widespread among marine fish but remains poorly documented in polar ecosystems. Using hyperspectral imaging, we report fluorescent emissions in two polar zoarcid eelpouts. A captive Antarctic eelpout (Pachycara brachycephalum) displayed uniform bright green fluorescence (~500–520 nm), whereas an Arctic eelpout (Lycodes ...
Thomas Juhasz‐Dora, Matthew Slater, Amirhossein Karamyar, Stein‐Kato Lindberg   +3 more
wiley   +1 more source

Computed tomography reveals multiple origins of extreme caudal vertebral pneumaticity in sauropod dinosaurs

Journal of Anatomy, EarlyView.
Here, we present novel CT scan data of caudal vertebrae of six Middle–Late Jurassic sauropods, representing several eusauropod lineages. We synthesise these new data with a comprehensive critical appraisal of purported external and internal evidence for caudal vertebral PSP in Sauropodomorpha.
Samantha L. Beeston, Daniela Schwarz, Paul Upchurch, Stephen F. Poropat, Patrick Asbach, Philip D. Mannion   +5 more
wiley   +1 more source

Giant kelp (Macrocystis pyrifera) gametophytes grow endophytically in red macroalgae: Implications for kelp restoration

Journal of Phycology, EarlyView.
Abstract Giant kelp (Macrocystis pyrifera) forests have declined by 95% in Australia since the 1970s due to climate change. Despite expanding restoration efforts, long‐term recovery is still lacking. Factors influencing recruitment by the microscopic gametophyte phase may represent a key mechanism underpinning the successful recovery and restoration of
Tamzin Gannon, Wouter Visch, Christopher P. Burridge, Adam Smolenski, Sharee McCammon, Ellen Gunn, Jeffrey T. Wright, Catriona L. Hurd, Scott Bennett   +8 more
wiley   +1 more source

Genomic analyses of giant kelp reveal restricted connectivity across the Southern Hemisphere and striking diversity in Aotearoa (New Zealand)

Journal of Phycology, EarlyView.
Abstract The macroalga Macrocystis pyrifera (“giant” or “bladder” kelp) plays a vital role in cold‐temperate marine ecosystems but faces increasing threats from ongoing environmental change. Understanding its population diversity and connectivity is essential for predicting future range shifts and assessing the ecological consequences of such shifts in
Xiaoyue Pluto Liu, Alana Alexander, Narissa Bax, Donna Bond, Ceridwen I. Fraser   +4 more
wiley   +1 more source