Issues
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Cover image
Cover Image
Cover: A southern elephant seal (Mirounga leonina) buoyed up from resting on Bird Island, South Atlantic, before embarking on his long postbreeding migration. Seasonal on-land fasting and at-sea foraging cycles lead to remarkable fluctuations in the body composition of this species. Changes in body composition are reflected by changes in buoyancy, and in this issue Gordine et al. (pp. 3816-3824) present a new method for detecting such buoyancy changes. Their method identifies dive phases during which seals drift for extended periods and measures changes in the rate at which an individual either sinks or rises whilst drifting.
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RESEARCH ARTICLES
Aestivation induces changes in transcription and translation of coagulation factor II and fibrinogen gamma chain in the liver of the African lungfish Protopterus annectens
Summary: Changes occur in the transcription and translation of two pro-coagulant genes, coagulation factor II and fibrinogen gamma chain, in the liver of the African lungfish Protopterus annectens during three phases of aestivation.
Allometry in Physarum plasmodium during free locomotion: size versus shape, speed and rhythm
Summary: Allometric studies of Physarum polycepharum reveal the existence of not only scaling law in locomotion speed, cell shape and intrinsic rhythm but also non-scalable rhythm components related to formation of the entire cell shape.
Paradoxical anaerobism in desert pupfish
Highlighted Article: Pupfish acclimated to warm but ecologically relevant temperatures experience extended periods of anaerobism despite the availability of ambient oxygen.
A role for nitric oxide in the control of breathing in zebrafish (Danio rerio)
Summary: Nitric oxide, a gaseous neurotransmitter, plays a modulatory role in controlling breathing in zebrafish during acute changes in environmental oxygen levels, and its role changes throughout development.
Characterizing the metabolic capacity of the anoxic hagfish heart
Summary: Anoxia exposure of the excised Pacific hagfish heart causes an immediate decrease in metabolic activity but this fully recovers during the subsequent 6 h of anoxia.
To boldly gulp: standard metabolic rate and boldness have context-dependent influences on risk-taking to breathe air in a catfish
Highlighted Article: Air is much richer in oxygen than water, but surfacing to gulp air can require boldness in the air-breathing catfish.
Eye and head movements shape gaze shifts in Indian peafowl
Summary: Indian peafowl use eye and head movements to shift their gaze but, unlike mammals, they do not rely on the vestibulo-ocular reflex to stabilize their gaze.
Behavioural evidence for a visual and proprioceptive control of head roll in hoverflies (Episyrphus balteatus)
Summary: Tethered flying hoverflies shed new light on a proprioception role to stabilize the body roll.
CaMKII knockdown affects both early and late phases of olfactory long-term memory in the honeybee
Summary: CaMKII inhibition and knockdown disrupts both early and late phases of olfactory long-term memory in the honeybee but leaves acquisition and MTM intact.
Stable isotope studies reveal pathways for the incorporation of non-essential amino acids in Acyrthosiphon pisum (pea aphids)
Highlighted Article: Dietary aspartic acid, asparagine, glutamic acid and glutamine are catabolized and re-synthesized in metabolic pathways for the synthesis of other amino acids in the aphid-Buchnera system.
Discontinuous gas-exchange cycle characteristics are differentially affected by hydration state and energy metabolism in gregarious and solitary desert locusts
Summary: This study shows that haemolymph loss and energy metabolism combine to affect the ability of insects to maintain discontinuous gas exchange cycles under stressful conditions.
Fishing for drifts: detecting buoyancy changes of a top marine predator using a step-wise filtering method
Summary: A step-wise filtering method to detect buoyancy changes in drift diving pinnipeds.
Observations on the spawning behavior, egg masses and paralarval development of the ommastrephid squid Todarodes pacificus in a laboratory mesocosm
Highlighted Article: Mesocosm observations on the reproduction of the squid Todarodes pacificus reveal the animal's spawning behavior, egg mass properties and paralarval development in a simulated natural environment.
Guineafowl with a twist: asymmetric limb control in steady bipedal locomotion
Summary: Guineafowl running on treadmills and trackways often yaw from their direction of travel; this deviation is reflected by the limb kinematics, wherein femora synchronously rotate about their long axes to skew limbs mediolaterally through the stride cycle.
A simple behaviour provides accuracy and flexibility in odour plume tracking – the robotic control of sensory-motor coupling in silkmoths
Summary: The odour plume-tracking ability of silkmoths is enhanced by visually guided osmotropotaxis combined with pre-programmed behaviour.
The sexually dimorphic behaviour of adult Drosophila suzukii: elevated female locomotor activity and loss of siesta is a post-mating response
Summary: Elevated daylight activity of female Drosophila suzukii (spotted-wing Drosophila) is a post-mating response.
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.
