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INSIDE JEB

REVIEW

Summary: We review our current understanding of intertidal invertebrate freeze tolerance, highlighting knowledge gaps, proposed physiological mechanisms behind this trait and potential future directions of study.

METHODS & TECHNIQUES

Summary: Novel tools for analyzing skin pattern dynamics can be applied in the detection of changes in cuttlefish mantle activity that depend on feeding state, and not on sensory stimulation.

RESEARCH ARTICLES

Summary: The cost of digesting and assimilating a meal is consistent across temperatures, ration sizes, body mass and sex in adult walleye.

Summary: Experimental evidence shows that two stimuli triggering a metabolic (temperature decrease) or glucocorticoid (restraint) response caused comparable increases in plasma glucocorticoids and glucose.

Summary: High-resolution mapping of a transgenic pan-neuronal reporter reveals unexpected variability in the number and anatomical organization of ganglionic neurons in seemingly stereotypical leech segmental ganglia.

Summary: Collagen intermolecular cross-links adapt regions in equine third metacarpals for differences in load histories from natural bending. These cross-links help enhance bone toughness, which helps resist fracture.

Highlighted Article: Spongy moth larvae show significant variation in metabolic rate–temperature relationships during the larval stage, demonstrating that insect thermal physiology does not remain static during larval ontogeny.

Editors' choice: Light intensity and spectrum interact to determine influence on locomotor activity of a nocturnal rodent, with amber light having half the effect of full-spectrum light at 50 lx.

Highlighted Article: Amphibious fish acclimated to irregular, stochastic daily temperature fluctuations cease reproduction, grow more slowly and decrease gill surface area compared with fish acclimated to regular thermal cycles.

ECR SPOTLIGHTS

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