J. C. McNamara

Differential effects of cobalt ions in vitro on gill (Na+, K+)-ATPase kinetics in the blue crab Callinectes danae (Decapoda, Brachyura)

This study investigates how cobalt ions affect the K+-phosphatase activity of a blue crab gill (Na+, K+)-ATPase, showing stimulatory and inhibitory effects depending on the presence of Mg2+.

Can hyper/hypo-osmoregulating fiddler crabs from the Atlantic coast of South America mobilize intracellular free amino acids as osmotic effectors during salinity challenge?

This study examines whether fiddler crabs can mobilize intracellular free amino acids during salinity challenges, finding asymmetrical FAA responses to hyper- and hypo-osmotic stress.

Evolutionary trade-offs in osmotic and ionic regulation and the expression of gill ion transporter genes in high latitude, Neotropical cold clime crabs from the 'end of the world'

This study compares osmoregulatory strategies and gill ion transporter gene expression in two Sub-Antarctic crabs, revealing interspecific differences in salinity tolerance and gene regulation.

Strategies of invertebrate osmoregulation: an evolutionary blueprint for transmuting into fresh water from the sea

The paper examines osmoregulatory adaptations in freshwater invertebrates, showing a logarithmic decrease in hemolymph osmolality with increasing surface-to-volume ratios and a cut-off at ~200 mOsmoles/kg H2O.

Survival on a semi-arid island: submersion and desiccation tolerances of fiddler crabs from the Galapagos Archipelago

This study compares submersion and desiccation tolerances between two Galapagos fiddler crab species, revealing differences in physiological adaptations and oxidative stress responses.

Salt transport by the gill Na+-K+-2Cl- symporter in palaemonid shrimps: exploring physiological, molecular and evolutionary landscapes

This study examines salt transport mechanisms in palaemonid shrimps across different salinity niches, finding that gill NKCC expression correlates with osmoregulatory capabilities and suggests a role in salt uptake.

Effect of salinity on modulation by ATP, protein kinases and FXYD2 peptide of gill (Na+, K+)-ATPase activity in the swamp ghost crab Ucides cordatus (Brachyura, Ocypodidae)

This study examines how salinity affects (Na+, K+)-ATPase activity in Ucides cordatus crabs, showing activity peaks at isosmotic conditions and modulation by FXYD2 peptide and protein kinases.

Tissue accumulation and the effects of long-term dietary copper contamination on osmoregulation in the mudflat fiddler crab Minuca rapax (Crustacea, Ocypodidae)

This study examines the effects of long-term dietary copper contamination on osmoregulation in the mudflat fiddler crab Minuca rapax, showing changes in copper accumulation and ion regulation.

Osmotic and ionic regulation by hololimnetic freshwater crustaceans: a molecular role for gill ion transporters

This study compares osmoregulatory strategies in two freshwater crustaceans, showing divergent gene expression responses to osmotic stress.