Insect lifestyle and evolution of brain morphology

Bouchebti, Sofia; Arganda, Sara

doi:10.1016/j.cois.2020.09.012

Cited by 13 publications

(6 citation statements)

References 63 publications

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“…Even though the biological function of repeats has not been well studied in shrimp, they are associated with important functions in insects such as adaptations (Christmas et al, 2019;Gilbert et al, 2020), sex chromosome differentiation (Rosolen et al, 2018) and morphology (Bouchebti & Arganda, 2020). In crustaceans, the proliferation of repeat elements has been reported to cause the expansion in genome sizes (Alfsnes et al, 2017).…”

Section: Identification Of Growth-associated Genesmentioning

confidence: 99%

A chromosome‐level assembly of the black tiger shrimp (Penaeus monodon) genome facilitates the identification of growth‐associated genes

Uengwetwanit

Pootakham

Nookaew

et al. 2021

Molecular Ecology Resources

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Section: Identification Of Growth-associated Genesmentioning

confidence: 99%

A chromosome‐level assembly of the black tiger shrimp (Penaeus monodon) genome facilitates the identification of growth‐associated genes

Uengwetwanit

Pootakham

Nookaew

et al. 2021

Molecular Ecology Resources

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“…Thus, in adult and nymphal dragonflies, the same brain regions seem to be able to process highly diverging information provided through different sensory structures, in air and water, respectively. We might here be confronted with central nervous structures that adapt through minimal tuning to new requirements [ 64 ].…”

Section: Discussionmentioning

confidence: 99%

The Antennal Pathway of Dragonfly Nymphs, from Sensilla to the Brain

Piersanti

Rebora

Salerno

et al. 2020

Insects

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Dragonflies are hemimetabolous insects, switching from an aquatic life style as nymphs to aerial life as adults, confronted to different environmental cues. How sensory structures on the antennae and the brain regions processing the incoming information are adapted to the reception of fundamentally different sensory cues has not been investigated in hemimetabolous insects. Here we describe the antennal sensilla, the general brain structure, and the antennal sensory pathways in the last six nymphal instars of Libellula depressa, in comparison with earlier published data from adults, using scanning electron microscopy, and antennal receptor neuron and antennal lobe output neuron mass-tracing with tetramethylrhodamin. Brain structure was visualized with an anti-synapsin antibody. Differently from adults, the nymphal antennal flagellum harbors many mechanoreceptive sensilla, one olfactory, and two thermo-hygroreceptive sensilla at all investigated instars. The nymphal brain is very similar to the adult brain throughout development, despite the considerable differences in antennal sensilla and habitat. Like in adults, nymphal brains contain mushroom bodies lacking calyces and small aglomerular antennal lobes. Antennal fibers innervate the antennal lobe similar to adult brains and the gnathal ganglion more prominently than in adults. Similar brain structures are thus used in L. depressa nymphs and adults to process diverging sensory information.

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“…Variation in diet, social organization, and behavioral polyphenisms in insects may be underpinned by neuroanatomical differentiation. Brain size in insects correlates with life history and diet (Farris and Roberts, 2005;Farris, 2008;Bouchebti and Arganda, 2020) and an increase in MB size, potentially supporting enhanced foraging-related navigation and memory (Sayol et al, 2020). At a cellular scale, the density of MB synaptic complexes (microglomeruli, MG) correlates with age, subcaste, task specialization or increase in behavioral repertoire (Groh and Rössler, 2011;Groh et al, 2014;Kamhi et al, 2017;, or requirements for higher-order processing involved in learning and memory (Li et al, 2017).…”

Section: Diet Sociality and Brain Evolutionmentioning

confidence: 99%

Socioecology and Evolutionary Neurobiology of Predatory Ants

2022

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Diet and social complexity are hypothesized to drive the evolution of the neuroarchitecture of the brain, but the relative impacts of foraging ecology and social organization have not been fully disentangled. Predatory ant species encompass generalists as well as specialists on remarkably narrow ranges of arthropod prey, and vary in strategy from solitary hunting to group raiding. Dietary differences and variation in individual or group predation appear to be correlated with the use of vision for navigation by solitary huntresses, the predominance of chemical signaling to organize group predation, and the structure, biomechanics, and sensorimotor control of the mandibles, and likely gustatory sensilla. Predatory ants provide the opportunity to separate the relative roles of diet and colony size and brain structure, and offer diverse novel systems to understand adaptive brain mosaicism and the neuronal regulation of predatory behavior. Here we discuss the socioecology of predatory ants and its influence on neuroanatomy. THE NEUROBIOLOGY OF PREDATIONNeuroethological and molecular studies of visual, olfactory, auditory, pheromonal, electrical, and mechanoreceptive sensory systems have identified circuitry underpinning predatory behavior in diverse animal clades (Sillar et al., 2016). Star-nosed moles (Catania, 2011), electric fishes (Sukhum et al., 2018), and bats (Genzel et al., 2018 are renowned models. Predator sensory systems generally reflect foraging ecology. Many predatory insects, for example, have large eyes to detect and pursue moving prey through interceptive or ambush hunting strategies. Optic lobe neurons tuned to the motion of small moving objects regulate predatory behavior (

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Insect lifestyle and evolution of brain morphology

Cited by 13 publications

References 63 publications

A chromosome‐level assembly of the black tiger shrimp (Penaeus monodon) genome facilitates the identification of growth‐associated genes

A chromosome‐level assembly of the black tiger shrimp (Penaeus monodon) genome facilitates the identification of growth‐associated genes

The Antennal Pathway of Dragonfly Nymphs, from Sensilla to the Brain

Socioecology and Evolutionary Neurobiology of Predatory Ants

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