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April, 2019; 222 (7)

INSIDE JEB

  • You have accessSubscription required
    Muscles brake and bend joints to shape wings
    Kathryn Knight
    Journal of Experimental Biology 2019 222: jeb204214 doi: 10.1242/jeb.204214 Published 9 April 2019
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    Pollen is essential for health of honey bee gut bugs
    Kathryn Knight
    Journal of Experimental Biology 2019 222: jeb202564 doi: 10.1242/jeb.202564 Published 5 April 2019
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    Mantis shrimp fine-tune ballistic blows
    Kathryn Knight
    Journal of Experimental Biology 2019 222: jeb203356 doi: 10.1242/jeb.203356 Published 4 April 2019
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    Mystery of how aquatic insects breathe in aquifers solved
    Kathryn Knight
    Journal of Experimental Biology 2019 222: jeb202531 doi: 10.1242/jeb.202531 Published 4 April 2019
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    Stubborn insects stick to regular walk when scaling slopes
    Kathryn Knight
    Journal of Experimental Biology 2019 222: jeb203323 doi: 10.1242/jeb.203323 Published 3 April 2019
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    Key hormones disappear early from egg
    Kathryn Knight
    Journal of Experimental Biology 2019 222: jeb203349 doi: 10.1242/jeb.203349 Published 3 April 2019

OUTSIDE JEB

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    Fish fitness is on the rocks
    Alex Evans
    Journal of Experimental Biology 2019 222: jeb192716 doi: 10.1242/jeb.192716 Published 1 April 2019
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    Small zooplankton rings the alarm for oxygen loss in big oceans
    Yangfan Zhang
    Journal of Experimental Biology 2019 222: jeb199141 doi: 10.1242/jeb.199141 Published 1 April 2019
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    Insects that stink and hatch in sync
    Ilan Ruhr
    Journal of Experimental Biology 2019 222: jeb192740 doi: 10.1242/jeb.192740 Published 1 April 2019
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    A spider's decision depends on its thirst
    Julia Nowack
    Journal of Experimental Biology 2019 222: jeb192724 doi: 10.1242/jeb.192724 Published 1 April 2019

COMMENTARY

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    Loss-of-function approaches in comparative physiology: is there a future for knockdown experiments in the era of genome editing?
    Alex M. Zimmer, Yihang K. Pan, Theanuga Chandrapalan, Raymond W. M. Kwong, Steve F. Perry
    Journal of Experimental Biology 2019 222: jeb175737 doi: 10.1242/jeb.175737 Published 4 April 2019

    Summary: We discuss the merits and pitfalls of current knockdown and knockout approaches and advocate for the continued use of knockdown experiments in order to maintain progress in physiological research.

SHORT COMMUNICATION

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    Does the left aorta provide proton-rich blood to the gut when crocodilians digest a meal?
    Justin L. Conner, Janna L. Crossley, Ruth Elsey, Derek Nelson, Tobias Wang, Dane A. Crossley
    Journal of Experimental Biology 2019 222: jeb201079 doi: 10.1242/jeb.201079 Published 1 April 2019

    Summary: Blood in the left aorta of American alligators does not contain elevated PCO2 levels during digestion.

RESEARCH ARTICLES

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    Natural polymorphism in protein kinase G modulates functional senescence in Drosophila melanogaster
    Stephanie P. Kelly, Ken Dawson-Scully
    Journal of Experimental Biology 2019 222: jeb199364 doi: 10.1242/jeb.199364 Published 9 April 2019

    Summary: PKG, encoded by the polymorphic foraging gene, confers hypoxia tolerance at the expense of lifespan and healthy aging, indicating a novel role for PKG in aging and senescence.

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    Variation in sexual brain size dimorphism over the breeding cycle in the three-spined stickleback
    Séverine D. Buechel, Kristina Noreikiene, Jacquelin DeFaveri, Elisavet Toli, Niclas Kolm, Juha Merilä
    Journal of Experimental Biology 2019 222: jeb194464 doi: 10.1242/jeb.194464 Published 9 April 2019

    Summary: Sex-specific changes in brain size over the breeding cycle in the three-spined stickleback may be the reason for varying estimates of sexual brain size dimorphism across studies of this species.

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    Increased apical sodium-dependent glucose transporter abundance in the ctenidium of the giant clam Tridacna squamosa upon illumination
    Christabel Y. L. Chan, Kum C. Hiong, Celine Y. L. Choo, Mel V. Boo, Wai P. Wong, Shit F. Chew, Yuen K. Ip
    Journal of Experimental Biology 2019 222: jeb195644 doi: 10.1242/jeb.195644 Published 9 April 2019

    Summary: The giant clam Tridacna squamosa expresses an apical sodium/glucose cotransporter 1 homolog in the ctenidium that could participate in light-enhanced glucose absorption.

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    Sensory feedback independent pre-song vocalizations correlate with time to song initiation
    Divya Rao, Satoshi Kojima, Raghav Rajan
    Journal of Experimental Biology 2019 222: jeb199042 doi: 10.1242/jeb.199042 Published 9 April 2019

    Summary: The number and progression of introductory notes to song in the zebra finch are not affected by removal of sensory feedback.

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    Work loop dynamics of the pigeon (Columba livia) humerotriceps demonstrate potentially diverse roles for active wing morphing
    Jolan S. Theriault, Joseph W. Bahlman, Robert E. Shadwick, Douglas L. Altshuler
    Journal of Experimental Biology 2019 222: jeb195578 doi: 10.1242/jeb.195578 Published 5 April 2019

    Highlighted Article: In pigeons, natural variation in wingbeat frequency, and humerotriceps activation phase and duration, indicate functional plasticity that can effectively power different flight behaviors.

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    Pollen reverses decreased lifespan, altered nutritional metabolism and suppressed immunity in honey bees (Apis mellifera) treated with antibiotics
    Jianghong Li, Matthew C. Heerman, Jay D. Evans, Robyn Rose, Wenfeng Li, Cristina Rodríguez-García, Gloria DeGrandi-Hoffman, Yazhou Zhao, Shaokang Huang, Zhiguo Li, Michele Hamilton, Yanping Chen
    Journal of Experimental Biology 2019 222: jeb202077 doi: 10.1242/jeb.202077 Published 5 April 2019

    Highlighted Article: Bacteria in pollen confer the ability to inhibit virus replication, extend lifespan and improve overall health in honey bees treated with antibiotics.

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    Context-dependent scaling of kinematics and energetics during contests and feeding in mantis shrimp
    P. A. Green, M. J. McHenry, S. N. Patek
    Journal of Experimental Biology 2019 222: jeb198085 doi: 10.1242/jeb.198085 Published 4 April 2019

    Editors' Choice: Behavioral context alters kinematic and energetic scaling in animals with spring-powered movements. Variable spring compression likely underlies these context-specific changes, which have implications for theories of contest and feeding behavior.

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    Cutaneous respiration by diving beetles from underground aquifers of Western Australia (Coleoptera: Dytiscidae)
    Karl K. Jones, Steven J. B. Cooper, Roger S. Seymour
    Journal of Experimental Biology 2019 222: jeb196659 doi: 10.1242/jeb.196659 Published 4 April 2019

    Highlighted Article: Subterranean diving beetles survive permanently under water using cutaneous respiration, making them independent of visits to the surface to collect air, but restricting them to a small size.

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    Interspecific scaling of blood flow rates and arterial sizes in mammals
    Roger S. Seymour, Qiaohui Hu, Edward P. Snelling, Craig R. White
    Journal of Experimental Biology 2019 222: jeb199554 doi: 10.1242/jeb.199554 Published 3 April 2019

    Summary: Blood flow rates determine artery sizes in mammals, independent of body mass.

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    Motor control of an insect leg during level and incline walking
    Chris J. Dallmann, Volker Dürr, Josef Schmitz
    Journal of Experimental Biology 2019 222: jeb188748 doi: 10.1242/jeb.188748 Published 3 April 2019

    Highlighted Article: In stick insect hindlegs, muscle activity is adjusted to different mechanical demands during walking, primarily early in stance. Adjustments strongly affect forces/torques but not kinematics and suggest step-by-step control.

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    Avian yolk androgens are metabolized rather than taken up by the embryo during the first days of incubation
    Neeraj Kumar, Annie van Dam, Hjalmar Permentier, Martijn van Faassen, Ido Kema, Manfred Gahr, Ton G. G. Groothuis
    Journal of Experimental Biology 2019 222: jeb193961 doi: 10.1242/jeb.193961 Published 3 April 2019

    Highlighted Article: Mass spectrometric analysis using stable isotope labelled androgens shows that maternal androgens in bird egg yolk are not taken up by the embryo during early incubation but rather are metabolized.

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    Elevated oxidative stress in pied flycatcher nestlings of eumelanic foster fathers under low rearing temperatures
    P. E. Teerikorpi, J. Stauffer, P. Ilmonen, S. Calhim, W. Schuett, T. Laaksonen
    Journal of Experimental Biology 2019 222: jeb195909 doi: 10.1242/jeb.195909 Published 3 April 2019

    Summary: The pied flycatcher demonstrates a temperature-dependent association between oxidative stress of offspring and variation in the melanin coloration of their foster father.

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    The quantity–quality trade-off: differential effects of daily food availability times on reproductive performance and offspring quality in diurnal zebra finches
    Ila Mishra, Vinod Kumar
    Journal of Experimental Biology 2019 222: jeb196667 doi: 10.1242/jeb.196667 Published 3 April 2019

    Summary: Absence of food in the morning compromises reproductive fecundity but not quality of offspring, whereas food absence in the evening compromises quality (skeletal growth and overall size) of offspring but not reproductive fecundity in continuously breeding diurnal zebra finches.

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    3D ultrastructural organisation of calcium release units in the avian sarcoplasmic reticulum
    Thomas M. D. Sheard, Sanjay R. Kharche, Christian Pinali, Holly A. Shiels
    Journal of Experimental Biology 2019 222: jeb197640 doi: 10.1242/jeb.197640 Published 1 April 2019

    Summary: 3D reconstructions of calcium release units in the avian heart combined with computer modelling reveal that close clustering of cSR along the Z-line is vital for rapid propagation of the Ca2+ signal, enabling strong, fast contractions of the avian heart.

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    Genetic and environmental effects on the scaling of metabolic rate with body size
    Erlend I. F. Fossen, Christophe Pélabon, Sigurd Einum
    Journal of Experimental Biology 2019 222: jeb193243 doi: 10.1242/jeb.193243 Published 1 April 2019

    Summary: Daphnia magna shows a genotype-by-temperature interaction in the allometric intercept of metabolic rate, but no genetic effects on the allometric slope.

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    Morph- and sex-specific effects of challenging conditions on maintenance parameters in the Gouldian finch
    Rita Fragueira, Simon Verhulst, Michaël Beaulieu
    Journal of Experimental Biology 2019 222: jeb196030 doi: 10.1242/jeb.196030 Published 1 April 2019

    Highlighted Article: Gouldian finches exhibit physiological divergence between individuals of different morphs and between reproductive partners under energetically demanding conditions (heatwave, moult or reproduction).

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    Zonation of Ca2+ transport and enzyme activity in the caeca of rainbow trout – a simple structure with complex functions
    Melanie Williams, Domenico Barranca, Carol Bucking
    Journal of Experimental Biology 2019 222: jeb187484 doi: 10.1242/jeb.187484 Published 1 April 2019

    Summary: A novel technique revealed region-specific ion transport properties within the caeca of rainbow trout. Feeding and environmental manipulation altered ion transport characteristics, which changes in enzyme activity supported.

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    Softness sensing and learning in Drosophila larvae
    Nana Kudow, Azusa Kamikouchi, Teiichi Tanimura
    Journal of Experimental Biology 2019 222: jeb196329 doi: 10.1242/jeb.196329 Published 1 April 2019

    Summary: Drosophila melanogaster larvae prefer a soft food substrate. They can learn the softness of agarose gel and evaluate foods by balancing softness and sweetness. Genetic background affects the larval preference for softness.

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    Control of breathing and respiratory gas exchange in high-altitude ducks native to the Andes
    Catherine M. Ivy, Sabine L. Lague, Julia M. York, Beverly A. Chua, Luis Alza, Rebecca Cheek, Neal J. Dawson, Peter B. Frappell, Kevin G. McCracken, William K. Milsom, Graham R. Scott
    Journal of Experimental Biology 2019 222: jeb198622 doi: 10.1242/jeb.198622 Published 1 April 2019

    Summary: Distinct physiological strategies for coping with hypoxia exist across different high-altitude lineages of ducks.

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    Early developmental stages of native populations of Ciona intestinalis under increased temperature are affected by local habitat history

    E. A. Clutton, G. Alurralde, T. Repolho
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    Omega-3 fatty acids accelerate fledging in an avian marine predator: a potential role of cognition

    Jessika Lamarre, Sukhinder Kaur Cheema, Gregory J. Robertson, David R. Wilson
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    Efficient high-voltage protection in the electric catfish

    Georg Welzel, Stefan Schuster
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    The Murphy number: how pitch moment of inertia dictates quadrupedal walking and running energetics

    Delyle T. Polet
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    Tactile active sensing in an insect plant pollinator

    T. Deora, M. A. Ahmed, T. L. Daniel, B. W. Brunton
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