Right-to-left shunt has modest effects on CO2 delivery to the gut during digestion, but compromises oxygen delivery
Summary: Shunting in reptiles is ineffective for regulating gastric CO2 supply but effectively reduces blood O2 levels.
Longitudinal and transversal displacements between triceps surae muscles during locomotion of the rat
Summary: Differences in anatomy, morphology and neural drive between rat ankle plantar-flexors cause substantial intermuscular displacement during locomotion, which may affect mechanical interactions between muscle bellies and tendons.
Can multi-generational exposure to ocean warming and acidification lead to the adaptation of life history and physiology in a marine metazoan?
Summary: The multi-generational acclimation capacity of a species to ocean warming and acidification is determined by the flexibility of its mitochondrial electron transport system.
Calorespirometry reveals that goldfish prioritize aerobic metabolism over metabolic rate depression in all but near-anoxic environments
Summary: Although the goldfish's anoxia tolerance results from conserved energy via metabolic depression, its hypoxia tolerance results from exceptional O2 extraction abilities capable of supporting routine metabolic rate even in severe hypoxia.
Summary: Food quality during development had long-lasting effects on memory in pigeons, with a moderate nutritional deficit improving spatial memory performance in a foraging context.
Highlighted Article: Increased physical activity increases antioxidant defence mechanisms and thereby reduces oxidative stress and increases resilience to the negative effects of UV-B radiation, so that locomotor performance can be maintained in environments exposed to solar radiation.
Summary: Rh proteins are expressed in anal papillae of larval Aedes aegypti, where they partake in ammonia excretion. Results suggest that AeRh50-1 may transport CO2.
Physostomous channel catfish, Ictalurus punctatus, modify swimming mode and buoyancy based on flow conditions
Summary: Channel catfish adopted negative buoyancy in lentic environments, but maintained buoyancy closer to neutral in lotic environments to optimise their locomotion.
Dietary fat alters the response of hypothalamic neuropeptide Y to subsequent energy intake in broiler chickens
Summary: Hypothalamus-based self-adjustment in response to dietary fat can vary among lean and fat individuals, and depends upon whole-body energy reserves and feeding experience.
Antioxidants and embryo phenotype: is there experimental evidence for strong integration of the antioxidant system?
Summary: Weak relationships exist between several yolk antioxidants, oxidative status markers in the yolk, liver and brain, and embryo morphology in the yellow-legged gull.
Contrasting effects of increased yolk testosterone content on development and oxidative status in gull embryos
Summary: Increased yolk testosterone concentration in yellow-legged gulls promotes body mass growth of embryos but reduces brain size. Moreover, sex differences in brain size exist among control embryos.
Naturalistic path integration of Cataglyphis desert ants on an air-cushioned lightweight spherical treadmill
Highlighted Article: Cataglyphis ants are shown to exhibit naturalistic navigation and typical homing behaviour, with a straight approach phase and looping search phase, on newly designed, fast-responding, lightweight, air-cushioned treadmill.
The evolution of jaw protrusion mechanics is tightly coupled to bentho-pelagic divergence in damselfishes (Pomacentridae)
Summary: Evolutionary analyses of both form and function in damselfishes demonstrate tight linkage between jaw protrusion ability and the repeated convergence on predominantly benthic or predominantly pelagic feeding niches.
Effects of elevated carbon dioxide and temperature on locomotion and the repeatability of lateralization in a keystone marine mollusc
Highlighted Article: Elevated levels of CO2 affect route finding, locomotion and repeatability of lateralization of a keystone marine mollusc in a T-maze.
Orally administered fatty acids enhance anorectic potential but do not activate central fatty acid sensing in Senegalese sole post-larvae
Summary: Different fatty acids induced changes in the expression of neuropeptides implicated in the control of food intake through a mechanism not involving central fatty acid-sensing systems.
Stellate and pyramidal neurons in goldfish telencephalon respond differently to anoxia and GABA receptor inhibition
Summary: In the anoxia-tolerant goldfish brain, pyramidal and stellate neurons depolarize close to the GABA-A receptor reversal potential during anoxia, which makes pyramidal neurons less and stellate neurons more active.
Batoid locomotion: effects of speed on pectoral fin deformation in the little skate, Leucoraja erinacea
Summary: Three-dimensional analysis of pectoral fin movement in the little skate during swimming reveals substantial changes in shape as speed increases.
Enhanced fertility and chill tolerance after cold-induced reproductive arrest in females of temperate species of the Drosophila buzzatii complex
Summary: Temperate but not tropical females of the Drosophila buzzatii complex under reproductive arrest improve fitness after cold acclimation. Such cold adaptation could contribute to spread temperate species into cooler environments.
Photoperiod but not food restriction modulates innate immunity in an opportunistic breeder, Loxia curvirostra
Summary: Long day lengths and induced sickness, but not food restriction, increase multiple measures of innate immunity in the red crossbill, an opportunistically breeding bird.