METHODS & TECHNIQUES
Summary: By keeping an animal on top of an obstacle-laden sphere, a ‘terrain treadmill’ enables high-resolution observation of locomotion through obstacles as large as animals over a long time and distance.
Respirometry protocols for avian thermoregulation at high air temperatures: stepped and steady-state profiles yield similar results
Summary: Patterns of thermoregulation at air temperatures approaching or exceeding body temperature in a passerine bird are similar when using a stepped series of progressively increasing air temperatures or continuous exposure for several hours to each air temperature setpoint.
Generating spatiotemporal patterns of linearly polarised light at high frame rates for insect vision research
Summary: Design of a versatile visual stimulation device for presenting moving patterns of polarised light, and demonstration of its use to characterise polarisation sensitivity in butterfly photoreceptors and blowfly motion-sensitive interneurons.
Summary: The bee parasite Nosema ceranae reduces olfactory learning in bumblebees. This sublethal effect can compromise colony foraging success and chemical communication between bees, ultimately leading to colony collapse.
Physiological responses and adjustments of corals to strong seasonal temperature variations (20–28°C)
Highlighted Article: Substantial reduction of metabolic functions rather than thermal compensation is the response of corals to strong seasonal temperature reductions.
The role of environmental calcium in the extreme acid tolerance of northern banjo frog (Limnodynastes terraereginae) larvae
Summary: Tolerance of naturally acidic, dilute and soft water by larvae of the frog Limnodynastes terraereginae involves adaptations to the branchial calcium transport pathway, which protect intercellular junctions against damage.
Obligatory homeothermy of mesic habitat-adapted African striped mice, Rhabdomys pumilio, is governed by seasonal basal metabolism and year-round ‘thermogenic readiness’ of brown adipose tissue
Highlighted Article: Unpredictable cold spells require African striped mice to maintain high heat production capacity throughout the year, achieved through nuanced trade-offs between organ size and metabolic activity.
A new theoretical performance landscape for suction feeding reveals adaptive kinematics in a natural population of reef damselfish
Highlighted Article: The in situ feeding performance of Chromis viridis indicates that the population resides close to a local performance peak.
Flying on empty: reduced mitochondrial function and flight capacity in food-deprived monarch butterflies
Summary: Low food availability, but not infection, negatively affects mitochondrial function and flight performance in monarch butterflies, with potential implications for migration, fitness and population dynamics.
The mechanical and morphological properties of systemic and pulmonary arteries differ in the Madagascar ground boa, a snake without ventricular pressure separation
Summary: Although pulmonary blood pressure and systemic blood pressure are the same in the Madagascar ground boa because of the lack of intraventricular pressure separation, aorta and pulmonary artery vessel walls have different morphologies.
Summary: Castes and subcastes of Camponotus fellah ants are clearly distinguished in form characteristics and body size. Despite these morphometric variations, all ants, including males, show the same general walking characteristics.
The trunk–tail junctional region in Ciona larvae autonomously expresses tail-beating bursts at ∼20 second intervals
Summary: Mid-piece fragments of tadpole larvae of the ascidian Ciona, lacking most of the anterior trunk and posterior tail, autonomously and periodically express tail-beating bursts.
Summary: The biosynthesis and emission of a key Drosophila pheromone are differentially affected by ageing, social context, and early exposure to this pheromone and to microbes.
Mild hypoxia exposure impacts peripheral serotonin uptake and degradation in Gulf toadfish (Opsanus beta)
Highlighted Article: During hypoxia, toadfish experience lower plasma serotonin concentrations and a corresponding increase in gill serotonin uptake and degradation, suggesting that the gill regulates circulating serotonin during hypoxia.