Respiratory Responses of the Blue Crab Callinectes sapidus to Long-Term Hypoxia

The Biological Bulletin
P L DeFurJ E Reese

Abstract

Blue crabs (Callinectes sapidus) were held in hypoxic (50-55 mm Hg) water for 7-25 days. Postbranchial blood PO2 fell by about 80% within 24 h and then remained unchanged. Postbranchial blood total CO2 increased within 24 h and remained elevated for the duration of the experiment. There was no change in postbranchial blood pH, osmolality, or Cl. Lactate, urate, and Ca+2 all raise the O2 affinity of blue crab hemocyanin; by 25 days, blood lactate and urate had risen slightly, but Ca+2 had increased dramatically. Hemocyanin concentration had also increased by 25 days. At both 7 and 25 days there was an intrinsic increase in hemocyanin-O2 affinity and a change in subunit composition. The highly adaptive homotropic change is believed to be due to an attendant shift in the proportions of two of the three variable monomeric hemocyanin subunits. Thus, both heterotropic and homotropic adaptations enhance blood oxygenation at the gill during long-term hypoxia.

Citations

Feb 18, 2018·Scientific Reports·Manuela TruebanoJohn I Spicer
Dec 15, 1992·The Journal of Experimental Zoology·M Regnault
Jun 1, 2011·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Rolando J QuesadaDarryl J Heard
Jul 15, 2016·Integrative and Comparative Biology·Jillian G JohnsonKaren G Burnett
Dec 3, 2016·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Mark P Lehtonen, Louis E Burnett
May 11, 2013·Integrative and Comparative Biology·P CalosiJ I Spicer
Aug 1, 2015·Integrative and Comparative Biology·Karen G Burnett, Louis E Burnett
Jan 5, 2021·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Tábata Martins de LimaCharles D Derby
Nov 15, 2020·The Science of the Total Environment·Daria BedulinaStefan Kalkhof
Nov 24, 2001·Respiration Physiology·B R McMahon
Nov 7, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·H Decker, R Föll
Mar 24, 2004·Micron : the International Research and Review Journal for Microscopy·Fabienne ChaussonFranck Zal
Mar 24, 2004·Micron : the International Research and Review Journal for Microscopy·Fabienne ChaussonFranck Zal
Mar 5, 2014·Chemical Reviews·Edward I SolomonLi Tian
Jul 19, 2008·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Hong-yu LiuDe-bin Zheng
Oct 28, 2008·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Meiling HongNa Yu

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.