Oxygen consumption rate and Na+/K+-ATPase activity in early developmental stages of the sea urchin Paracentrotus lividus Lam.

Abstract

Changes in oxygen consumption rate and Na ? / K ? -ATPase activity during early development were studied in the sea urchin Paracentrotus lividus Lam. The oxygen consumption rate increased from 0.12 lmol O 2 mg protein -1 h -1 in unfertilized eggs to 0.38 lmol O 2 mg protein -1 h -1 25 min after fertilization. Specific activity of the Na ? /K ? -ATPase was significantly stimulated after fertilization, ranging up to 1.07 lmol P i h -1 mg protein -1 in the late blastula stage and slightly lower values in the early and late pluteus stages.

Toxicity of Tire Particle Leachates on Early Life Stages of Keystone Sea Urchin Species

“…No significant effect of the leachate was found. Values were in accordance with those reported by Tomšić et al (2011) in early stages of P. lividus. The absence of a response in this parameter could indicate that the respiration rate remained constant while maintenance costs might have increased due to detoxification processes (e.g., GST induction).…”

Sea Urchins in Acute High Temperature and Low Oxygen Environments: The Regulatory Role of microRNAs in Response to Environmental Stress

“…Very high summer temperatures and depleting aquaculture resources lead to hypoxic conditions that can be fatal or sublethal for sea urchins and can cause mass mortality (Riedel et al, 2014). Under hypoxic stress, significant changes in the oxygen consumption rate (Tomi et al, 2011) and the expression of immune and metabolic-related genes were found to occur in sea urchins (Suh et al, 2014;Hao et al, 2022). Therefore, hypoxia is another important factor that limits the survival and growth of sea urchins.…”