Finding the right thermal limit: a framework to reconcile ecological, physiological and methodological aspects of CTmax in ectotherms
Summary: Presentation of a framework to reconcile methodological measurements and mechanisms related to the physiology of heat stress tolerance limits, thermal injury and repair in ectotherms.
Mouthpart adaptations of antlion larvae facilitate prey handling and fluid feeding in sandy habitats
Highlighted Article: Feeding experiments with larvae of the antlion Myrmeleon crudelis combined with studies of mechanical properties and wettability reveal that antlions have mouthparts with a structural organization and wetting dichotomy that simultaneously support fluid-feeding and self-cleaning abilities.
A magnetic pulse does not affect free-flight navigation behaviour of a medium-distance songbird migrant in spring
Summary: Magnetic pulse pre-treatment disturbed geomagnetic navigation in caged birds. However, our free-flying songbirds show no effect, questioning the effect of the pulse on or usage of geomagnetic maps.
METHODS & TECHNIQUES
HeartCV: a tool for transferrable, automated measurement of heart rate and heart rate variability in transparent animals
Summary: HeartCV is an open-source Python package that can automatically measure cardiac rhythm traits in a wide range of species, life history stages and experimental designs.
The effects of physical and temporal certainty on human locomotion with discrete underfoot perturbations
Highlighted Article: Temporal certainty of upcoming underfoot perturbations shows little influence on anticipatory or reactive locomotor behavior. Physical certainty allows individuals to respond to perturbations more effectively than when perturbations are uncertain.
Highlighted Article: When an amphibious fish leaves the water, it becomes more difficult for it to return owing to plastic changes in physiology.
Temperature independence of haemoglobin–oxygen affinity in smalleye Pacific opah (Lampris incognitus) and swordfish (Xiphias gladius)
Highlighted Article: Smalleye Pacific opah haemoglobin–O2 affinity is temperature independent, while the temperature dependence of swordfish haemoglobin–O2 affinity is pH dependent and becomes temperature independent at low pH.
Summary: The volatilome of Aiptasia shows that symbiosis affects the diversity of biogenic volatile organic compounds (BVOCs) produced in this model system.
Unruly octopuses are the rule: Octopus vulgaris use multiple and individually variable strategies in an episodic-like memory task
Summary: When trained in an episodic-like memory task, common octopuses favour individual foraging strategies rather than keeping track of time to solve the task as cuttlefish do.
Fast-growing growth hormone transgenic coho salmon (Oncorhynchus kisutch) show a lower incidence of vaterite deposition and malformations in sagittal otoliths
Summary: Coho salmon transgenic for growth hormone have lower laterite incidence and malformations.
Summary: The developmental time series of rice coral, Montipora capitata, under ocean acidification shows that while embryos are robust to low pH, the energetic cost may have negative carryover effects on swimming larvae.
Summary: Evidence that a desert pollinator, Centris caesalpiniae, regulates body temperature with an abdominal convector while flying.
Muscle preactivation and the limits of muscle power output during jumping in the Cuban tree frog Osteopilus septentrionalis
Summary: The duration of muscle activation in Cuban tree frogs reveals the limits of muscle power output during jumping.
The effects of training, acute exercise and dietary fatty acid composition on muscle lipid oxidative capacity in European starlings
Summary: Starlings increase fatty acid transporters in their flight muscles in response to acute exercise but not after long-term training, whereas citrate synthase increased with acute exercise only.
The influence of substrate size upon pulling and gripping forces in parrots (Psittaciformes: Agapornis roseicollis)
Summary: Parrots are capable of powerful grasps across a range of substrate sizes, but their strongest grips occur at diameters that align with free-ranging perch size preferences.