Patterns and processes in amphibious fish: biomechanics and neural control of fish terrestrial locomotion
Summary: Amphibious fishes use a diversity of terrestrial locomotor modes dependent upon body shape, physical constraints and phylogeny.
Summary: Solving a mystery regarding loud displays of trainbearer hummingbirds: high-speed videos unveil that the wings, not the extremely elongated tails in males, are responsible for these sonations.
Summary: Lamprey have novel hyperpolarizing (OFF) retinal bipolar cells receiving purely rod input, unlike gnathostomes from fish to mammals. Retinal organization during evolution may have been more fluid than previously thought.
Long duration advertisement calls of nesting male plainfin midshipman fish are honest indicators of size and condition
Summary: The advertisement calls of nesting male plainfin midshipman fish contain information about size and condition of the calling male, which could potentially be used by females in mate choice decisions.
Network analysis reveals that acute stress exacerbates gene regulatory responses of the gill to seawater in Atlantic salmon
Summary: In juvenile Atlantic salmon, aquaculture-related handling and confinement stress increases investment in seawater-related gene expression as part of a compensatory response to impaired seawater tolerance.
Highlighted Article: Oil droplets are captured by filter feeders at low Reynolds number using thick boundary layers and at high Reynolds number via direct interception.
A mixture of innate cryoprotectants is key for freeze tolerance and cryopreservation of a drosophilid fly larva
Highlighted Article: Components of the natural cryoprotectant mixture of an extremely freeze-tolerant insect work in synergy and behave differently during organismal freezing and cryopreservation.
Summary: Walking blowflies apparently choose one of two objects to approach. In model simulations, a fixation scheme combined with random attention replicates this behavior without an explicit decision mechanism.
Summary: Although sexual dimorphism in morphology is common in nature, sex-specific multivariate relationships between morphology and performance in green anole lizards suggest distinct ecological demands in males and females.
Metabolomic and transcriptomic responses of ticks during recovery from cold shock reveal mechanisms of survival
Summary: Transcriptional and metabolomic data reveal mechanisms associated with enhanced cold hardiness in ticks exposed to rapid-cold hardening conditions.
Flexor digitorum brevis utilizes elastic strain energy to contribute to both work generation and energy absorption at the foot
Summary: Demonstration of an adaptive mechanism that enables the intrinsic foot muscles to make versatile contributions to whole-body accelerations and decelerations.
Summary: Analysis of feeding by anchored garden eels in a flume shows their unique strategies, modulating dependence on burrows and foraging movements, to enable effective feeding at a wide range of flow speeds.
Context-dependent relationships between swimming, terrestrial jumping and body composition in the amphibious fish Kryptolebias marmoratus
Summary: Comparison of aquatic and terrestrial athletic performance of an amphibious fish indicates no evidence of a trade-off in locomotor performance, perhaps because they are powered by different subsets of the axial musculature (red versus white).
Inactivity and the passive slowing effect of cold on resting metabolism as the primary drivers of energy savings in overwintering fishes
Editor's Choice: Overwintering behaviour among fishes ranges from dormant to lethargic to active. Energy savings come from activity reductions and passive slowing of metabolism by the cold, not from metabolic rate depression.
Summary: Harbour seals are vocal learners that can escape acoustic allometry despite complying with anatomical allometric constraints. Advanced neural control over their vocal organs may allow them to break acoustic allometry.
Glucose tolerance of iguanas is affected by high-sugar diets in the lab and supplemental feeding by ecotourists in the wild
Highlighted Article: Experimental sugar supplementation in the laboratory and tourist feeding in the wild alter glucose tolerance and metabolism in two species of iguanas.