Issues

Summary: This Perspective addresses the unique challenges and disparities faced by comparative physiologists in the Global South and discusses collaborative efforts and solutions to promote a more equitable research landscape.

Summary: In vitro gastrointestinal research on fish requires better replication of in vivo conditions in terms of ammonia, HCO₃⁻ and ion concentrations, as well as pH, P_CO2, P_O2 and microbial community.

Summary: When determining fibre cross-sectional area of single skinned mammalian muscle fibres, it is preferable to assume that the cross-sectional shape is elliptical rather than circular.

Summary: Pulmonary surfactant from hibernating animals maintains the ability to reach low surface tensions during episodic breathing patterns and low temperatures. This activity is maintained within the hydrophobic component of surfactant.

Summary: Application of a ratiometric calcium-sensitive dye and confocal microscopy to analyse cytosolic calcium in coral cells.

Summary: Kinematics analysis of the center of mass trajectory and body orientation of flying snakes show quasi-steady theory is insufficient to explain forces acting on the body; instead, unsteady 3D effects are important for snake flight.

Summary: In a flight arena, Drosophila melanogaster tracks sun stimulus movement in the presence of UV and green wavelengths but lacks a time-compensated sun compass.

Summary: A comparison of the locomotor behaviors of three musteloid taxa reveals that arboreal gait characteristics in primates can occur independently in non-primate mammals, such as kinkajous and coatis.

Summary: Trunk flexion during bipedal walking causes specific adjustments in muscle activity related to mechanics; the relationship between posture and gait has implications for understanding motor control in gait disorders.

Summary: Accelerometery analysis of pied flycatcher flight behaviours suggests that males and females invest equally in parental care, but that this comes at a reduced cost to males because of their higher flight performance potential.

Highlighted Article: Fledgling and adult Cory's shearwaters prefer red light and darker surroundings, suggesting that short-range exposure to artificial light contributes to seabird disorientation and may exacerbate fallout events.

Summary: Drosophila tachykinins are diuretic hormones in the fly that regulate activity of the MTs and, consequently, contribute towards the maintenance of ionic and osmotic homeostasis.

Summary: Analysis of respiratory system mechanics in juvenile and adult terrestrial red-footed tortoise shows positional and ontogenetic effects on mechanical properties, shedding light on how life stage may influence respiratory function.

Highlighted Article: Odor sensitivity and odorant receptor expression increased in the olfactory epithelium of coho salmon after they were exposed to amino acid odorants during periods of imprinting.

Summary: Prey preferences by generalist predators can hinge on only one or two contact-protein cues, without the need for fluid-borne (air or water) compounds, low-molecular-weight substances, or mixture blends. Environmental setting is important in determining these chemical preferences.

Summary: The Burmese python exhibits significant increases in oxygen consumption during digestion, correlating with increases in heart rate and core body temperature.

Summary: Facing acute heating, the body mass scaling exponent of aerobic scope of rainbow trout deteriorated under normoxia but was reestablished under hyperoxia.

Editors' Choice: One species of live yeast in the gut will support normal-speed Drosophila larval development. The yeasts must be alive, suggesting that yeasts are not just food, but have a biological interaction with their host.