Issues
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Cover image
Cover Image
Cover: The intensity and spectrum of artificial light at night affect animal behavior by determining the degree to which animal visual and circadian systems are influenced. Longcore et al. (jeb247235) measured light at night in the Coachella Valley, CA, USA, with hemispherical imagery (pictured) to set realistic exposure levels for a laboratory study with house mice. They showed a synergistic effect of light intensity (as perceived by humans) and spectral composition, with a much lower suppression of nocturnal activity for lights with a lower correlated color temperature, suggesting an avenue to reduce the adverse effects of light pollution through adjusting the spectrum. Photo credit: Travis Longcore.
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INSIDE JEB
REVIEW
Ice in the intertidal: patterns and processes of freeze tolerance in intertidal invertebrates
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
State-dependent dynamics of cuttlefish mantle activity
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
Thermal performance curves for aerobic scope and specific dynamic action in a sexually dimorphic piscivore: implications for a warming climate
Summary: The cost of digesting and assimilating a meal is consistent across temperatures, ration sizes, body mass and sex in adult walleye.
Corticosterone and glucose are correlated and show similar response patterns to temperature and stress in a free-living bird
Summary: Experimental evidence shows that two stimuli triggering a metabolic (temperature decrease) or glucocorticoid (restraint) response caused comparable increases in plasma glucocorticoids and glucose.
Transgenesis enables mapping of segmental ganglia in the leech Helobdella austinensis
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.
Roles of collagen cross-links and osteon collagen/lamellar morphotypes in equine third metacarpals in tension and compression tests
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.
Ontogenetic variation in metabolic rate–temperature relationships during larval development
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.
Relative importance of intensity and spectrum of artificial light at night in disrupting behavior of a nocturnal rodent
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.
Warming, stochastic diel thermal fluctuations affect physiological performance and gill plasticity in an amphibious mangrove fish
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
CORRESPONDENCE
Announcing the 2024 JEB Outstanding Paper Prize shortlist and winner

Every year JEB celebrates early-career researchers through the Outstanding Paper Prize. We recognise the shortlisted ECRS that contributed to 11 remarkable studies published in 2024 and congratulate the winner, Elise Laetz, from University of Groningen. See how else JEB supports and promotes ECRs.
Inside the Intergovernmental Panel on Climate Change with Hans-Otto Pörtner

During the past two decades, Hans-Otto Pörtner has steered climate change policy as a co-Chair of IPCC Working Group II. He tells us about the experience in this Perspective.
Photosynthesis turns symbiotic sea anemone's tentacles toward sun

Snakelocks sea anemones point their tentacles, packed with symbiotic algae, toward the sun so their lodgers can photosynthesize, and now Vengamanaidu Modepalli & colleagues have discovered that photosynthesis by the algae guides their host's tentacles towards the sun.
History of our journals

As our publisher, The Company of Biologists, turns 100 years old, read about JEB’s history and explore the journey of each of our sister journals: Development, Journal of Cell Science, Disease Models & Mechanisms and Biology Open.