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Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology

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https://www.readbyqxmd.com/read/29980840/the-role-of-spatial-texture-in-visual-control-of-bumblebee-learning-flights
#1
Nellie Linander, Marie Dacke, Emily Baird, Natalie Hempel de Ibarra
When leaving the nest for the first time, bees and wasps perform elaborate learning flights, during which the location of the nest is memorised. These flights are characterised by a succession of arcs or loops of increasing radius centred around the nest, with an incremental increase in ground speed, which requires precise control of the flight manoeuvres by the insect. Here, we investigated the role of optic flow cues in the control of learning flights by manipulating spatial texture in the ventral and panoramic visual field...
July 6, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29974192/lateral-undulation-of-the-flexible-spine-of-sprawling-posture-vertebrates
#2
REVIEW
Wei Wang, Aihong Ji, Poramate Manoonpong, Huan Shen, Jie Hu, Zhendong Dai, Zhiwei Yu
Sprawling posture vertebrates have a flexible spine that bends the trunk primarily in the horizontal plane during locomotion. By coordinating cyclical lateral trunk flexion and limb movements, these animals are very mobile and show extraordinary maneuverability. The dynamic and static stability displayed in complex and changing environments are highly correlated with such lateral bending patterns. The axial dynamics of their compliant body can also be critical for achieving energy-efficient locomotion at high velocities...
July 4, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29961122/olfactory-navigation-versus-olfactory-activation-a-controversy-revisited
#3
EDITORIAL
Charles Walcott, Wolfgang Wiltschko, Roswitha Wiltschko, Günther K H Zupanc
In the early 1970s, Floriano Papi and colleagues proposed the olfactory-navigation hypothesis, which explains the homing ability of pigeons by the existence of an odor-based map acquired through learning. This notion, although supported by some observations, has also generated considerable controversy since its inception. As an alternative, Paulo Jorge and colleagues formulated in 2009 the olfactory-activation hypothesis, which states that atmospheric odorants do not provide navigational information but, instead, activate a non-olfactory path integration system...
June 30, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29959501/the-peregrine-falcon-s-rapid-dive-on-the-adaptedness-of-the-arm-skeleton-and-shoulder-girdle
#4
Anke Schmitz, Nele Ondreka, Julia Poleschinski, Dominik Fischer, Helmut Schmitz, Adrian Klein, Horst Bleckmann, Christoph Bruecker
During a dive, peregrine falcons (Falco peregrinus) can reach a velocity of up to 320 km h- 1 . Our computational fluid dynamics simulations show that the forces that pull on the wings of a diving peregrine can reach up to three times the falcon's body mass at a stoop velocity of 80 m s- 1 (288 km h- 1 ). Since the bones of the wings and the shoulder girdle of a diving peregrine falcon experience large mechanical forces, we investigated these bones. For comparison, we also investigated the corresponding bones in European kestrels (Falco tinnunculus), sparrow hawks (Accipiter nisus) and pigeons (Columba livia domestica)...
June 29, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29926181/neural-basis-of-trigeminal-chemo-and-thermonociception-in-brown-treesnakes-boiga-irregularis-squamata-colubridae
#5
Bruce P Bryant, Fred Kraus
To elucidate the nociceptive system of the brown treesnake, Boiga irregularis, we exposed isolated brown treesnake trigeminal neurons to thermal and chemical stimulation. We measured responses as changes in intracellular calcium using ratiometric fluorescent calcium imaging. Responses to aversive thermal and chemical identified several classes of putative nociceptors. Compounds that were aversive excited many trigeminal neurons, putative chemonociceptors. Identification as nociceptors was further supported by lack of activation by compounds that were not aversive...
June 21, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29926180/temperature-modulates-photoperiodic-seasonal-responses-in-the-subtropical-tree-sparrow-passer-montanus
#6
Anand S Dixit, Iadalangki Bamon, Namram S Singh
We studied the effects of temperature on the photoperiodic regulation of seasonal reproduction and related events in the subtropical tree sparrow at Shillong, India. In the first experiment, one group of birds was maintained in an outdoor open aviary receiving natural photoperiod and temperature conditions, while the other group was exposed to natural photoperiod and constant temperature of 17 ± 2 °C in an outdoor closed aviary for 12 months. Although both sexes achieved peak gonadal growth at the same time (May) under the two conditions, gonadal regression and feathers molt were delayed under the temperature controlled condition...
June 20, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29948155/the-mechanical-leg-response-to-vibration-stimuli-in-cave-crickets-and-implications-for-vibrosensory-organ-functions
#7
Nataša Stritih Peljhan, Johannes Strauß
We investigate the influence of leg mechanics on the vibration input and function of vibrosensitive organs in the legs of the cave cricket Troglophilus neglectus, using laser Doppler vibrometry. By varying leg attachment, leg flexion, and body posture, we identify important influences on the amplitude and frequency parameters of transmitted vibrations. The legs respond best to relatively high-frequency vibration (200-2000 Hz), but in strong dependence on the leg position; the response peak shifts progressively over 500-1400 Hz towards higher frequencies following leg flexion...
June 14, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29876656/amplitude-and-duration-sensitivity-of-single-on-and-double-on-neurons-to-cf-fm-stimuli-in-inferior-colliculus-of-pratt-s-roundleaf-bat-hipposideros-pratti
#8
Ming-Jian Yang, Kang Peng, Jing Wang, Jia Tang, Zi-Ying Fu, Xin Wang, Qi-Cai Chen
During hunting, the duration and amplitude of bat's echolocation sounds co-vary. Our previous studies showed the inferior collicular neurons of constant frequency-frequency modulation (CF-FM) bat discharged as single-on (SO) or double-on (DO) responders when stimulated with behavior related CF-FM sounds. However, how the co-varied sound duration and amplitude modulate the response properties of SO and DO neurons were understudied. Therefore, we investigated amplitude- and duration-sensitivity in 121 neurons isolated in the inferior colliculus of CF-FM bat, Pratt's roundleaf bat (Hipposideros pratti)...
June 6, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29777384/contribution-of-different-tarsal-attachment-devices-to-the-overall-attachment-ability-of-the-stink-bug-nezara-viridula
#9
Gianandrea Salerno, Manuela Rebora, Alexander Kovalev, Elena Gorb, Stanislav Gorb
The tarsal attachment devices of the southern green stink bug Nezara viridula, a cosmopolitan pest of different crops, encompass a pair of claws, distal pretarsal smooth pulvilli, and a proximal hairy pad on the ventral basitarsus. To evaluate the role of these attachment devices in generating attachment, behavioural experiments testing locomotion of insects with ablated pulvilli, shaved hairs and cut-off claws were performed. Using traction force experiments, insect attachment performance was evaluated on artificial substrates characterised by different roughness and on two substrates with different surface energies in the air and under water...
May 17, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29752490/motor-innervation-pattern-of-labral-muscles-of-locusta-migratoria
#10
Abid Mahmood Alvi, Peter Bräunig
The current study investigates the motor innervation pattern of labral muscles in the adult locust and tries to interpret the results in the light of the hypothesis that the labrum phylogenetically developed by the fusion of paired appendages associated with the intercalary segment. Using Neurobiotin™ as a retrograde neuronal tracer, specific motor nerves or individual labral muscles were stained. Results show that the labral muscles receive innervation from tritocerebrum and suboesophageal ganglion. The axons of many motor neurons use three different pathways to cross the midline in the periphery to innervate ipsi- and contralateral muscles...
May 12, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29721708/electromagnetic-field-exposure-50-hz-impairs-response-to-noxious-heat-in-american-cockroach
#11
Justyna Maliszewska, Patrycja Marciniak, Hanna Kletkiewicz, Joanna Wyszkowska, Anna Nowakowska, Justyna Rogalska
Exposure to electromagnetic field (EMF) induces physiological changes in organism that are observed at different levels-from biochemical processes to behavior. In this study, we evaluated the effect of EMF exposure (50 Hz, 7 mT) on cockroach's response to noxious heat, measured as the latency to escape from high ambient temperature. We also measured the levels of lipid peroxidation and glutathione content as markers of oxidative balance in cockroaches exposed to EMF. Our results showed that exposure to EMF for 24, 72 h and 7 days significantly increases the latency to escape from noxious heat...
May 2, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29869687/understanding-innate-preferences-of-wild-bee-species-responses-to-wavelength-dependent-selective-excitation-of-blue-and-green-photoreceptor-types
#12
Oksana Ostroverkhova, Gracie Galindo, Claire Lande, Julie Kirby, Melissa Scherr, George Hoffman, Sujaya Rao
Bees have a trichromatic vision with ultraviolet, blue, and green photoreceptors in their compound eyes. While the three photoreceptor types comprise the 'color space' at the perceptual level, preferential excitation of one or two of the photoreceptor types has been shown to play an important role in innate color preferences of bumble bees. Bees have been shown to exhibit strong attraction to fluorescence emission exclusively in the blue spectral region. It is not known if emission exclusively in the green spectral region produces similar attraction...
July 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29869100/the-giant-butterfly-moth-paysandisia-archon-has-spectrally-rich-apposition-eyes-with-unique-light-dependent-photoreceptor-dynamics
#13
Primož Pirih, Marko Ilić, Jerneja Rudolf, Kentaro Arikawa, Doekele G Stavenga, Gregor Belušič
The palm borer moth Paysandisia archon (Burmeister, 1880) (fam. Castniidae) is a large, diurnally active palm pest. Its compound eyes consist of ~ 20,000 ommatidia and have apposition optics with interommatidial angles below 1°. The ommatidia contain nine photoreceptor cells and appear structurally similar to those in nymphalid butterflies. Two morphological ommatidial types were identified. Using the butterfly numbering scheme, in type I ommatidia, the distal rhabdom consists exclusively of the rhabdomeres of photoreceptors R1-2; the medial rhabdom has contributions from R1-8...
July 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29687162/early-milestones-in-the-understanding-of-echolocation-in-bats
#14
REVIEW
Alan D Grinnell
Almost 80 years ago, Griffin and Galambos discovered the phenomenon of echolocation in bats. Since then, the field has grown exponentially as new generations of investigators have joined the chase and technological advances have revolutionized working with ultrasound in the laboratory and in the field. Today our understanding of the diversity of behavioral and neural adaptations for echolocation constitutes one of the paramount triumphs of neuroethology. At the invitation of the editor in chief, I here review some of the important milestones in the discovery and early understanding of echolocation in bats through about the mid-1980s...
June 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29679143/early-foraging-life-spatial-and-temporal-aspects-of-landmark-learning-in-the-ant-cataglyphis-noda
#15
Pauline Nikola Fleischmann, Wolfgang Rössler, Rüdiger Wehner
Within the powerful navigational toolkit implemented in desert ants, path integration and landmark guidance are the key routines. Here, we use cue-conflict experiments to investigate the interplay between these two routines in ants, Cataglyphis noda, which start their foraging careers (novices) with learning walks and are then tested at different stages of experience. During their learning walks, the novices take nest-centered views from various directions around the nest. In the present experiments, these learning walks are spatially restricted by arranging differently sized water moats around the nest entrance and thus, limiting the space available around the nest and the nest-feeder route...
June 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29671049/parent-offspring-cohabitation-after-weaning-inhibits-partner-preference-and-alters-central-oxytocin-and-dopamine-systems-in-adult-mandarin-vole
#16
Ruiyong Wu, Zhenzhen Song, Fadao Tai
In some mammals, offspring may live with their parents for a very long time after weaning, but little is known about the effect of post-weaning parent-offspring cohabitation on the behavioral and neurobiological development of offspring. Here, we explored the effect of this experience on partner preference in adult mandarin vole (Microtus mandarinus). Levels of central oxytocin (OT), tyrosine hydroxylase (TH), as well as OT receptor (OTR), dopamine D1-type and D2-type receptors (D1R and D2R) mRNA expression in the nucleus accumbens (NAcc) and medial amygdala (MeA) were also measured...
June 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29666930/role-of-side-slip-flight-in-target-pursuit-blue-tailed-damselflies-ischnura-elegans-avoid-body-rotation-while-approaching-a-moving-perch
#17
Ziv Kassner, Gal Ribak
Visually guided flight control requires processing changes in the visual panorama (optic-flow) resulting from self-movement relative to stationary objects, as well as from moving objects passing through the field of view. We studied the ability of the blue-tailed damselfly, Ischnura elegans, to successfully land on a perch moving unpredictably. We tracked the insects landing on a vertical pole moved linearly 6 cm back and forth with sinusoidal changes in velocity. When the moving perch changed direction at frequencies higher than 1 Hz, the damselflies engaged in manoeuvres that typically involved sideways flight, with minimal changes in body orientation relative to the stationary environment...
June 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29610933/treadmill-locomotion-of-the-mouse-lemur-microcebus-murinus-kinematic-parameters-during-symmetrical-and-asymmetrical-gaits
#18
Marc Herbin, Eva Hommet, Vicky Hanotin-Dossot, Martine Perret, Rémi Hackert
The gaits of the adult grey mouse lemur Microcebus murinus were studied during treadmill locomotion over a large range of velocities. The locomotion sequences were analysed to determine the gait and the various spatiotemporal gait parameters of the limbs. We found that velocity adjustments are accounted for differently by stride frequency and stride length depending on whether the animal showed a symmetrical or an asymmetrical gait. When using symmetrical gaits the increase in velocity is associated with a constant contribution of the stride length and stride frequency; the increase of the stride frequency being always lower...
June 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29589113/corticosterone-level-and-central-dopaminergic-activity-involved-in-agile-and-exploratory-behaviours-in-formosan-wood-mice-apodemus-semotus
#19
Kun-Ruey Shieh, Shu-Chuan Yang
The native Formosan wood mouse (Apodemus semotus) is the dominant rodent in Taiwan. In their natural environment, Formosan wood mice exhibit high locomotor activity, including searching and exploratory behaviours, which is observed similarly in the laboratory environment. How the behavioural responses of Formosan wood mice exhibit in elevated plus maze and marble burying tests remains unclear. How corticosterone levels and central dopaminergic activities are related to the behaviours in these tests is also unclear...
June 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29582137/diversity-and-common-themes-in-the-organization-of-ocelli-in-hymenoptera-odonata-and-diptera
#20
Willi Ribi, Jochen Zeil
We show in a comparative analysis that distinct retinal specializations in insect ocelli are much more common than previously realized and that the rhabdom organization of ocellar photoreceptors is extremely diverse. Hymenoptera, Odonata and Diptera show prominent equatorial fovea-like indentations of the ocellar retinae, where distal receptor endings are furthest removed from the lens surface and receptor densities are highest. In contrast, rhabdomere arrangements are very diverse across insect groups: in Hymenoptera, with some exceptions, pairs of ocellar retinular cells form sheet-like rhabdoms that form elongated rectangular shapes in cross-section, with highly aligned microvilli directions perpendicular to the long axis of cross-sections...
May 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
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