INSIDE JEB
OUTSIDE JEB
REVIEW
- Pain in aquatic animals
Summary: This review discusses how aquatic animals may differ in their neurobiological and behavioural responses to injurious stimuli compared with terrestrial animals, which has interesting implications for the evolution of pain.
RESEARCH ARTICLES
- Effect of temperature on leg kinematics in sprinting tarantulas (Aphonopelma hentzi): high speed may limit hydraulic joint actuation
Highlighted Article: Tarantulas extend their leg joints hydraulically. The coupling between in-series, hydraulically actuated joints was lowest at the highest temperature when the animals ran the fastest with the highest stride frequencies. The coordination of multiple, in-series hydraulically actuated joints may be limited by operating speed.
- Identification and characterization of the NMDA receptor and its role in regulating reproduction in the cockroach Diploptera punctata
Summary: The NMDA receptor in cockroaches does not appear to be involved in the regulation of JH biosynthesis and has no effect on female reproduction.
- Functional morphology of the Alligator mississippiensis larynx with implications for vocal production
Summary: Morphology and laryngeal biomechanics are used to model the boundaries of the alligator's available acoustic space.
- Conditioned frequency-dependent hearing sensitivity reduction in the bottlenose dolphin (Tursiops truncatus)
Summary: Conditioned dolphin hearing dampening, caused by pairing warning and loud sounds, was found to differ with frequency of the warning stimulus, suggesting that the hearing dampening was not due to a simple stapedial reflex.
- Effects of signal features and background noise on distance cue discrimination by a songbird
Summary: Experiments with trained animals help understanding of how song birds perceive signals in their natural environment. We tested how background noise affects the perception of acoustic cues that aid assessing the distance of a sound source.
- Cheating on the mutualistic contract: nutritional gain through seed predation in the frugivorous bat Chiroderma villosum (Phyllostomidae)
Highlighted Article: The frugivorous bat Chiroderma villosum obtains extra protein and fat by not only eating fruit pulp but also chewing seeds instead of dispersing them.
- The role of the cerebral ganglia in the venom-induced behavioral manipulation of cockroaches stung by the parasitoid jewel wasp
Summary: We show that venom injection by the jewel wasp to either the subesophageal ganglion or the central complex in the brain is, by itself, sufficient to induce a long-term hypokinetic state in its cockroach prey.
- Intraspecific scaling of the minimum metabolic cost of transport in leghorn chickens (Gallus gallus domesticus): links with limb kinematics, morphometrics and posture
Summary: Chickens with differing body size and posture but similar skeletal shape show no difference in the cost of transport.
- Divergent physiological responses in laboratory rats and mice raised at high altitude
Summary: Rats and mice that have been raised for a similar period of time under conditions of chronic hypoxia at high altitude display divergent physiological responses.
- Magnetic navigation behavior and the oceanic ecology of young loggerhead sea turtles
Highlighted Article: Lab-based experiments and simulations of observed behavior in an ocean circulation model give new insight into how magnetic navigation shapes the ecology of small sea turtles.
- Bumblebees measure optic flow for position and speed control flexibly within the frontal visual field
Summary: Bumblebees control their flight using motion cues generated by the nearest obstacles in the frontal visual field, a strategy that enables them to fly safely in cluttered environments.
- Transcriptional responses to fluctuating thermal regimes underpinning differences in survival in the solitary bee Megachile rotundata
Summary: Transcripts associated with chill injury, neurological development and longevity are up-regulated in bees exposed to fluctuating temperatures during post-diapause quiescence.
- Octopus arm movements under constrained conditions: adaptation, modification and plasticity of motor primitives
Summary: The ability of the motor system to adapt and modify motor primitives is shown by introducing a physical constraint to the octopus arm.
- Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar)
Summary: In Atlantic salmon, time of emergence from the nest is a trait linked to boldness, brain gene expression and monoaminergic function. This suggests divergent stress coping strategies of early and late emerging fish.
- Ocean acidification impacts on sperm mitochondrial membrane potential bring sperm swimming behaviour near its tipping point
Highlighted Article: Sea urchin sperm motility under acidified conditions is shown to be related to reduced mitochondrial potential. Future forecasts of ocean acidification could place sea urchin sperm at their tolerance threshold.
- Social dominance and reproductive differentiation mediated by dopaminergic signaling in a queenless ant
Summary: Dominant Diacamma ants have higher brain dopamine levels than subordinates and the fat body is the potential target of dopamine that mediates reproduction.
- Mechanical challenges to freshwater residency in sharks and rays
Summary: The high negative buoyancy of elasmobranchs increases the cost of locomotion and may be responsible for the scarcity of sharks in fresh water.
This issue
Other journals from The Company of Biologists
Editorial – The changing of the guard
In his Editorial, Hans Hoppeler announces that he will be stepping down as Editor-in-Chief of JEB in July 2020. He reflects on the history of JEB, why he has enjoyed his tenure as JEB’s Editor-in-Chief and the recent developments in the publishing world.
Big Biology podcast
JEB is partnering with the Big Biology podcast and in this sponsored episode, JEB Editor Michael Dickinson talks to the Big Biology team about the aerodynamic mechanisms of insect flight, how insects control flight with their tiny 100k neuron brain and his recent JEB paper showing how fruit flies navigate using the sun and polarized light as a compass.
Editors’ choice – An appetite for invasion: digestive physiology, thermal performance and food intake in lionfish (Pterois spp.)
Invasive lionfish are a colossal problem in the Mediterranean Sea and western Atlantic Ocean. Now it turns out that they are successful invaders because they invest more energy in digestion than moving about.
Travelling Fellowship – Anti-ageing in the Greenland Shark
Find out how Pierre Delaroche’s Travelling Fellowship grant from the Journal of Experimental Biology took him to Greenland, where he gathered data to further understand the ageing process in the longest-living vertebrate known to science. Don’t miss the next application deadline for 2020 travel, coming up on 29 November. Where will your research take you?
Commentary – Yank: the time derivative of force is an important biomechanical variable in sensorimotor systems
The derivative of force with respect to time does not have a standard term in physics. In their new Commentary, David C. Lin and his colleagues propose that the term ‘yank’ should be used to denote the time derivative of force.
Runners waste energy every time their legs stop swinging, but now a team of scientists from the US and Canada have shown that a springy ankle tether can reduce runners’ energy costs by 6.4%, which is nearly the entire cost of swinging the limbs. Read the full research article here.
Journal of Experimental Biology is pleased to announce a new partnership with Publons! This allows reviewers to easily track and verify every review by choosing to add the review to their Publons profile when completing the review submission form. Publons also makes it simple for reviewers to showcase their peer review contributions in a format that can be included in job and funding applications (without breaking reviewer anonymity). Read the official announcement here!
preLights – Oxygenation properties of hemoglobin and the evolutionary origins of isoform multiplicity in an amphibious air-breathing fish, the blue-spotted mudskipper (Boleophthalmus pectinirostris)
Charlotte Nelson highlights work in mudskippers suggesting that a diversity in expressed hemoglobin isoforms is not required for the switch between aquatic and aerial respiration.