Blue blood on ice: modulated blood oxygen transport facilitates cold compensation and eurythermy in an Antarctic octopod

  title={Blue blood on ice: modulated blood oxygen transport facilitates cold compensation and eurythermy in an Antarctic octopod},
  author={Michael Oellermann and Bernhard Lieb and Hans-O. P{\"o}rtner and Jayson M. Semmens and Felix Christopher Mark},
  journal={Frontiers in Zoology},
The Antarctic Ocean hosts a rich and diverse fauna despite inhospitable temperatures close to freezing, which require specialist adaptations to sustain animal activity and various underlying body functions. While oxygen transport has been suggested to be key in setting thermal tolerance in warmer climates, this constraint is relaxed in Antarctic fishes and crustaceans, due to high levels of dissolved oxygen. Less is known about how other Antarctic ectotherms cope with temperatures near zero… 

Structure-Function Relationships of Oxygen Transport Proteins in Marine Invertebrates Enduring Higher Temperatures and Deoxygenation

The distribution and multifunctional properties of oxygen transport proteins, notably hemocyanins, in the context of climate change, and the consequent physiological reprogramming of marine invertebrates are revisited.

Positive selection in octopus haemocyanin indicates functional links to temperature adaptation

This study has provided the first insight into molecular and structural mechanisms that have enabled octopods to sustain oxygen supply from polar to tropical conditions and implies modulation of oxygen binding via charge-charge interaction at the protein surface, which stabilize quaternary interactions among functional units to reduce detrimental effects of high pH on venous oxygen release.

Antarctic Marine Biodiversity: Adaptations, Environments and Responses to Change

  • L. Peck
  • Environmental Science, Biology
    Oceanography and Marine Biology
  • 2018
The current state of knowledge on the biodiversity of the Southern Ocean fauna and on the majority of known ecophysiological adaptations of coldblooded marine species to Antarctic conditions are described and the impacts these adaptations have on capacities to resist, or respond to change in the environment are evaluated.

RNA-sequencing Indicates High Hemocyanin Expression as a Key Strategy for Cold Adaptation in the Antarctic Amphipod Eusirus cf. giganteus Clade g3

The de novo transcriptome assembly and functional annotation of Eusirus cf.

Thermal sensitivity links to cellular cardiac decline in three spiny lobsters

Investigation of whole animal metabolism, cardiac performance and mitochondrial function in response to elevated temperatures for temperate, subtropical and tropical spiny lobster species concludes that acute temperature stress of spiny lobsters, irrespective of their climatic origin, is marked by declining cellular energetic function of the heart.

Life histories of Antarctic incirrate octopods (Cephalopoda: Octopoda)

The complex population structure (size, age and maturity range) of the specimens that were captured during a relatively short time, the number of beak increments quantified, and the preliminary validation observations indicate that Antarctic octopods do not deposit increments daily, and may have lifespans exceeding 3 years.

Acute-Stress Biomarkers in Three Octopodidae Species After Bottom Trawling

Three Octopodidae species from south-western waters of Europe have been evaluated for stress-related biomarkers resulting in differentiated mechanisms between species, which may pave the way to further study the physiology of stress in adult octopuses and develop new methodologies for their growth in aquaculture conditions.

The first global deep-sea stable isotope assessment reveals the unique trophic ecology of Vampire Squid Vampyroteuthis infernalis (Cephalopoda)

The results, presenting the first global comparison for a deep-sea invertebrate, demonstrate that V. infernalis has an ontogenetic decrease in δ15N and TL, coupled with niche broadening, which has enabled the success and abundance of this relict species inhabiting the largest ecological realm on the planet.

The Evolution of Hemocyanin Genes in Caenogastropoda: Gene Duplications and Intron Accumulation in Highly Diverse Gastropods

The results support the hypothesis that introns may contribute to adaptive radiation by offering new opportunities for genetic variability and regulation and suggest adaptation of hemocyanin genes may be one of several factors that contributed to the evolution of the large diversity of Apogastropoda.