Summary: Rapid cold hardening allows ectotherms to quickly enhance their cold tolerance. Here, we review the ecological relevance, underlying mechanisms and future research directions for this important process.
Dust and grit matter: abrasives of different size lead to opposing dental microwear textures in experimentally fed sheep (Ovis aries)
Summary: Dental microwear texture analysis shows the size of abrasives in the herbivore diet has a greater influence on dental microwear than their concentration, with different sizes creating opposing effects in terms of surface roughness.
Specialization for rapid excitation in fast squid tentacle muscle involves action potentials absent in slow arm muscle
Summary: Cross-striated muscle fibers of squid tentacles generate explosive elongation for prey capture through excitation by sodium-based action potentials; the slower obliquely striated arm muscle fibers do not produce action potentials or elongation.
Tracking activity patterns of a multispecies community of gymnotiform weakly electric fish in their neotropical habitat without tagging
Highlighted Article: Detailed movement patterns and complex electrosensory scenes of three species of weakly electric fish were tracked without tagging using a submerged electrode array in a small neotropical stream.
Summary: Aerodynamic lift from gliding hawk and owl tails, revealed by tracking helium bubbles, is inconsistent with passive stability or minimizing induced drag, but indicates a role in reducing viscous drag.
A small family business: synergistic and additive effects of the queen and the brood on worker reproduction in a primitively eusocial bee
Summary: Queen and brood exert additive and synergistic effects on worker reproduction, behavior and gene expression in bumble bees.
Summary: Exogenous manipulation of the dopaminergic system to test for effects on personality traits in the common waxbill (Estrilda astrild) reveals behavioural differences, some of which are context specific.
Musculoskeletal mass and shape are correlated with competitive ability in male house mice (Mus musculus)
Summary: Male house mice demonstrating high competitive ability possess several musculoskeletal traits hypothesized to improve fighting performance in male–male contests.
Summary: Food quality has a time-dependent impact on the offspring of male seahorses, revealing new insights into male pregnancy and its potential adaptive importance for syngnathid offspring.
Summary: Toads, unlike mammals, prioritize non-visual information to coordinate landing preparation.
Induction of vitellogenesis, methyl farnesoate synthesis and ecdysteroidogenesis in two edible crabs by arachidonic acid and prostaglandins
Summary: Induction of vitellogenesis in two edible crabs by administration of arachidonic acid and prostaglandins provides useful information on fecundity for the aquaculture of these species.
Consequences of HSF knockdown on gene expression during the heat shock response in Tigriopus californicus
Summary: In an investigation of its role in the heat shock response of an intertidal copepod, HSF-1 affected a complex gene suite both in response to and independent of heat stress.
Summary: Selective labelling of the cockroach's antennal lobe output neurons shows that odour responses are stimulus specific and concentration dependent, and preserve information on the spatial structure of the stimulus.
Short-term dehydration influences baseline but not stress-induced corticosterone levels in the house sparrow (Passer domesticus)
Summary: Elevated baseline corticosterone levels induced by water restriction may have critical consequences on several major life-history traits such as energy budget, mobility and potential responses to predators.
Dynamic biosonar adjustment strategies in deep-diving Risso's dolphins driven partly by prey evasion
Summary: Deep-diving Risso's dolphins use multiple biosonar adjustment strategies to balance inspection of complex multi-target environments with more gradual adjustment necessary to capture evasive prey.
Editors' Choice: Outdoor experiments with ants on a trackball and agent-based modelling suggest that navigating ants might continuously integrate attractive and repellent visual memories.
Walking kinematics in the polymorphic seed harvester ant Messor barbarus: influence of body size and load carriage
Summary: Scale effect rather than morphological differences explain the variability in load-carrying performance in different-sized individuals in the polymorphic ant species Messor barbarus.
Spectral organization of the compound eye of a migrating nymphalid, the chestnut tiger butterfly Parantica sita
Summary: Eyes of chestnut tiger butterflies have UV-, blue- and green-sensitive cells and they are also polarization sensitive, which may be useful for visual orientation during migration.
Summary: Noxious thermal and mechanical stimuli evoke strike behavior in Manduca sexta and both stimuli activate individual nociceptive sensory neurons in the body wall.
Changes in the expression of genes involved in DNA methylation and histone modification in response to daily food availability times in zebra finches: epigenetic implications
Summary: An enforced daily feeding schedule in the long term could serve as a conditioning environment that shapes overall hypothalamic regulation, liver and gonadal functions in diurnal vertebrates at the genetic levels.
Summary: Sex-specific changes in the gut microbiome are associated with aggression during the non-breeding season in Siberian hamsters, suggesting a potential role for the microbiome in regulating seasonal aggression.