Behavioural effects of juvenile hormone and their influence on division of labour in leaf-cutting ant societies
Highlighted Article: Juvenile hormone is a key endocrine mediator of division of labour in leaf-cutting ant societies, causing behavioural transitions that mimic those seen in ants as they make the age-related switch from within-nest work to external work.
Summary: Stimulation by reward-associated odorants learned during conditioning of the proboscis extension response induces a characteristic walking pattern in honeybees, which changes during and after the odor stimulus.
Cold-hardening during long-term acclimation in a freeze-tolerant woolly bear caterpillar, Pyrrharctia isabella
Summary: After an extended period of cold acclimation, woolly bear caterpillars survived freezing at −20°C. Cold-hardening markedly increased hemolymph osmolality, as well as hemolymph levels of free proline, total amino acids and proteins.
Summary: Single silk-related behaviours induce lifetime trade-offs and affect performance in two species of spider.
Differences in electrosensory anatomy and social behavior in an area of sympatry between two species of mormyrid electric fishes
Summary: Differences in the sensory system that mediates electric communication correlate with differences in social behavior between two sympatric species of African mormyrid fishes.
Spatial release from masking in insects: contribution of peripheral directionality and central inhibition
Summary: Spatial separation between a signal and a masking noise can contribute up to 20 dB to signal detection, as studied in two species of acoustic insects.
Highlighted Article: The mechanics of below-branch quadrupedal locomotion in primates is not simply a mirror of above-branch quadrupedal locomotion, but instead shows kinetic similarities that may be related to arm swinging.
Dietary phosphate affects food selection, post-ingestive phosphorus fate, and performance of a polyphagous herbivore
Summary: Phosphorus limitation may be common for terrestrial herbivores; in response, grasshoppers can modulate P assimilation over a moderate range but extreme and/or long-term consumption of low-P or indeed even high-P food decreases growth and survival.
Sex- and melanism-specific variations in the oxidative status of adult tawny owls in response to manipulated reproductive effort
Summary: Effects of manipulated reproductive effort on oxidative status differ between sexes and colour morphs in a melanin-based polymorphic raptor species with a strong division of labour between the sexes.
Osmoregulation and salinity-induced oxidative stress: is oxidative adaptation determined by gill function?
Summary: Gill tissues with different functions (respiratory/osmoregulatory) differentially produce reactive oxygen species and are differently adapted to deal with oxidative stress.
UV-B exposure reduces locomotor performance by impairing muscle function but not mitochondrial ATP production
Summary: UV-B-induced reactive oxygen species reduce locomotor performance of mosquitofish without affecting mitochondrial metabolism and ATP production.
Juvenile hormone downregulates vitellogenin production in Ectatomma tuberculatum (Hymenoptera: Formicidae) sterile workers
Summary: Juvenile hormone downregulates vitellogenin synthesis in worker ants producing trophic eggs.
Ambient CO2, fish behaviour and altered GABAergic neurotransmission: exploring the mechanism of CO2-altered behaviour by taking a hypercapnia dweller down to low CO2 levels
Highlighted Article: Although high levels of CO2 have repeatedly been linked to behavioural disturbance in marine fish, reducing CO2 concentration alters behaviour in a hypercapnia-dwelling fish, suggesting that neural ion balance is fine-tuned to prevailing CO2 conditions.
Summary: Acanthomorph fishes exhibit a large diversity of suction-feeding behaviors, which is driven by variation in the contribution of body ram. Suction distances are constrained even at broad evolutionary scales.