Cover: A female grey-backed mining bee (Andrena vaga) visiting a willow catkin. This bee species is strictly oligolectic and collects pollen only from flowers of the genus Salix. Burger et al. (jeb242166) studied the host-finding behaviour of A. vaga and recorded physiological responses of the antennae and brain to host and non-host odours. Olfactory cues were the key attractants for A. vaga, and 4-oxoisophorone – a component of Salix scents – evoked strong responses in the antennal lobe glomeruli. A high sensitivity to floral scents enables the specialized bees to effectively find flowers. Photo credit: M. Kaminski.
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Is hypoxia vulnerability in fishes a by-product of maximum metabolic rate?
Summary: This Commentary provides evidence that oxygen supply capacity in some fishes is optimized for performance at low oxygen, and discusses the implications of this finding for calculations of metabolic index.
Too big to study? The biologging approach to understanding the behavioural energetics of ocean giants
Summary: Increasingly sophisticated animal-borne electronic tags provide a new way of studying the energetics of giant marine vertebrates, for which captive experiments are limited or impossible.
Generation of propulsive force via vertical undulations in snakes
Summary: Snakes are capable of generating propulsion via vertical undulations, which allows them to exploit their environment in 3D and allows more effective use of previously overlooked surfaces in cluttered habitats.
Methamphetamine pollution elicits addiction in wild fish
Highlighted Article: Methamphetamine pollution alters fish behavior and habitat preference in freshwater ecosystems.
Dental microwear texture gradients in guinea pigs reveal that material properties of the diet affect chewing behaviour
Summary: Guinea pigs fed plant versus pelleted diets show development of opposing wear gradients along the cheek teeth row; this has implications for diet reconstruction based on dental microwear analysis when only isolated teeth are available.
The energetic function of the human foot and its muscles during accelerations and decelerations
Summary: The foot and its small muscles make important contributions to ankle function and to full-body movements when landing and jumping.
Hemolymph supply to locomotor muscles of the ghost crab Ocypode quadrata
Summary: Capillary-like vessels are well developed to provide ghost crab skeletal muscles with hemolymph. Aerobic fibers maintain smaller diameters and receive greater hemolymph flow than glycolytic fibers used for locomotion.
Scaling of oscillatory kinematics and Froude efficiency in baleen whales
Summary: Tags attached to baleen whales demonstrate how thrust power output, drag coefficient and Froude efficiency scale with swimming speed and body length.
Body size affects immune cell proportions in birds and non-volant mammals, but not bats
Summary: Powered flight might constrain morphology such that certain immunological features are prioritized. Bats show largely similar cell proportions across body mass compared with strong allometric scaling relationships in birds and non-volant mammals.
Evidence for the use of a high-resolution magnetic map by a short-distance migrant, the Alpine newt (Ichthyosaura alpestris)
Summary: Newts derive geographic position over distances of 1–2 km using a twilight sampling strategy to obtain map information that may involve precise measurements of spatial variation in the geomagnetic field.
The role of ligand-gated chloride channels in behavioural alterations at elevated CO2 in a cephalopod
Summary: Ionotropic GABA receptors and other ligand-gated chloride channels may underlie the alterations of some conspecific-directed behaviours at elevated CO2 in a cephalopod.
Neural and behavioural responses of the pollen-specialist bee Andrena vaga to Salix odours
Summary: Pollen-specialist Andrena vaga bees are highly tuned to 4-oxoisophorone, a typical Salix odorant component, at a very low concentration.
Juvenile hormone affects age polyethism, ovarian status and cuticular hydrocarbon profile in workers of the wasp Polybia occidentalis
Summary: Juvenile hormone, a pleiotropic hormone, regulates three different aspects in the social context of Polybia occidentalis: ovarian activation, behavioral maturation and chemical communication.
Determinants of climbing energetic costs in humans
Highlighted Article: The energetic mass-specific cost of transport for vertical climbing in humans is negatively correlated with climbing velocity, independent of body mass, and similar to that of other primates.
Proleg retractor muscles in Manduca sexta larvae are segmentally different, suggesting anteroposterior specialization
Summary: The Manduca sexta principal planta retractor muscle is a more complex structure than previously thought, consisting of multiple fibers originating at several sites and showing segmental differences, suggesting anterior–posterior specialization.
Cubam receptor-mediated endocytosis in hindgut-derived pseudoplacenta of a viviparous teleost (Xenotoca eiseni)
Summary: An endocytic pathway is a candidate for nutrient absorption in pseudoplacenta of a viviparous teleost. The trait may have developed from a common intestinal mechanism among vertebrates.
Role of the G protein-coupled receptors GPR84 and GPR119 in the central regulation of food intake in rainbow trout
Summary: The G protein-coupled receptors GPR84 and GPR119 are involved in food intake regulation in fish through their capacity to sense medium-chain fatty acid (GPR84) or N-acylethanolamides/triglyceride-derived molecules (GPR119).
Limited heat tolerance in a cold-adapted seabird: implications of a warming Arctic
Summary: Thick-billed murres have limited heat tolerance, displaying low evaporative cooling efficiencies and increases in physiological traits associated with heat stress at low air temperatures relative to desert birds.
Elevated cortisol lowers thermal tolerance but results in limited cardiac remodelling in rainbow trout (Oncorhynchus mykiss) experiencing chronic social stress
Summary: Chronic social stress lowers thermal tolerance (measured as CTmax) in rainbow trout. Manipulated cortisol levels show that chronic elevation of cortisol is the cause of lowered CTmax.
Repeat exposure to hypercapnic seawater modifies growth and oxidative status in a tolerant burrowing clam
Summary: Hypercapnic conditions during postlarval development improve physiological performance and oxidative status in Panopea generosa.
Long-term memory of configural learning is enhanced via CREB upregulation by the flavonoid quercetin in Lymnaea stagnalis
Summary: Intermediate-term memory for configural learning is converted to long-term memory following CREB upregulation by quercetin in Lymnaea stagnalis.
Meet the JEB Editors @ SEB 2023
Come and meet the JEB team at the Society for Experimental Biology centenary conference from 4-7 July in Edinburgh, UK. Visit exhibition stand 13/15 to pick up JEB centenary goodies, including our new ‘100 years of discovery’ T shirt, and join our Meet the JEB Editors event on Thursday 6 July at 12.30 at Platform 5 to find out more about the journal and chat to Editors including EiC Craig Franklin, Monitoring Editors Sanjay Sane, Trish Schulte and John Terblanche and the in-house News and Reviews team.
New funding schemes for junior faculty staff
In celebration of our 100th anniversary, JEB has launched two new grants to support junior faculty staff working in animal comparative physiology and biomechanics who are within five years of setting up their first lab/research group. Check out our ECR Visiting Fellowships and Research Partnership Kickstart Travel Grants. First deadline for applications is 15 July 2023.
JEB@100: an interview with Monitoring Editor Katie Gilmour
Katie Gilmour tells us how she first encountered the JEB Editorial team as a graduate student at the University of Cambridge, UK, and how she would like to have a Star Trek tricorder to monitor fish non-invasively in the field.
The Forest of Biologists
The Forest of Biologists is a biodiversity initiative created by The Company of Biologists, with support from the Woodland Trust. For every Research and Review article published in Journal of Experimental Biology a native tree is planted in a UK forest. In addition to this we are protecting and restoring ancient woodland and are dedicating these trees to our peer reviewers. Visit our virtual forest to learn more.
Centenary Review - Adaptive echolocation behavior
Cynthia F. Moss and colleagues Review the behaviours used by echolocating mammals to track and intercept moving prey, interrogate dynamic sonar scenes, and exploit visual and passive acoustic stimuli.
Crucial DNA at crux of insect wing size evolution
Keity Farfán-Pira and colleagues have revealed that a tiny region of regulatory DNA in the vestigial gene governs whether insect wings are large or small and has played a key role in the evolution of insect wing size.