Holosteans and Teleosts

Meek, J.; Nieuwenhuys, Rudolf

doi:10.1007/978-3-642-18262-4_15

Cited by 255 publications

(463 citation statements)

References 910 publications

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“…There is thus ample opportunity for the fry to learn the father's EOD waveform. Adult mormyrids, the brainiest among all fish (Meek & Nieuwenhuys, 1998), have proven excellent learners in many studies of this laboratory (Kramer, 2009).…”

Section: Discussionmentioning

confidence: 99%

Sexual selection by female choice prevents speciation reversal in a hybridizing trio of mormyrid fish in southern Africa: evidence from playback experiments of electric organ discharges

Schmid

Kramer

2014

Behav

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We studied the question of whether or not female choice among variant forms of species-specific male advertising signals, electric organ discharges (EODs), is a factor in preventing panmixy in a parapatric sibling complex of three species of mormyrid fish, inhabiting three parallel rivers in southern Africa. The three species' EODs are characteristically differentiated in waveform. The Upper Zambezi River is inhabited by Pollimyrus marianne Kramer, van der Bank, Flint, SauerGürth & Wink, 2003, the Okavango River by P. castelnaui (Boulenger, 1911), and the smaller Kwando River in their middle by P. cuandoensis Kramer, van der Bank & Wink, 2013, which is their hybrid species of unidirectional origin. P. castelnaui females (N = 4 out of 5) and P. marianne females (N = 5 of 5) responded stronger to playback of the EODs of male conspecifics compared to those of male P. cuandoensis. Pollimyrus castelnaui and P. marianne females neither preferred nor discriminated against the male EODs of each other's species, respectively (one exception). The single P. cuandoensis female available preferred a P. marianne male EOD over one of its own species, and was neutral in all other tests. This suggests that female resistance in the two main system species to P. cuandoensis male EODs is an evolved one, effectively limiting hybridization to the Kwando. The females of the two main system species, P. castelnaui and P. marianne, thus prevent panmixy in the Okavango and the Zambezi, respectively, thereby keeping up the threesibling species complex by discriminating female choice against P. cuandoensis males in the Okavango-Kwando-Zambezi system. Keywords

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Section: Discussionmentioning

confidence: 99%

Sexual selection by female choice prevents speciation reversal in a hybridizing trio of mormyrid fish in southern Africa: evidence from playback experiments of electric organ discharges

Schmid

Kramer

2014

Behav

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“…When the described procedure is complete, the brain should be completely free from the neurocranium. Meek & Nieuwenhuys (1998) and Striedter (2005), with a single modification: fish brains descriptions usually follow the posteroanterior direction (e.g., Meek & Nieuwenhuys, 1998), but herein we chose to follow Striedter (2005) in adopting the anteroposterior direction, the most commonly used for vertebrates as a whole (see Bauchot et al, 1989;Striedter, 2005;Eastman & Lannoo, 2007, 2008 for fishes; ten Donkelaar, 1998a for amphibians; ten Donkelaar, 1998b for reptiles and Walsh & Milner, 2011 for avians). For illustration and description purposes, the brains were divided into telencephalon, mesencephalon, diencephalon, rhombencephalon and medulla spinalis (Fig.…”

Section: Brain Dissection Protocolmentioning

confidence: 99%

“…1). The anatomical brain nomenclature follows Meek & Nieuwenhuys (1998) and Striedter (2005); bone nomenclature follows Weitzman (1962), with the modifications proposed by Castro & Vari (2004) and musculature terminology follows Datovo & Vari (2013;2014). (Figs.…”

Section: Brain Dissection Protocolmentioning

confidence: 99%

“…The cranial nerves are: rostrally, the nervus olfactorius (nI), ending in the bulbus olfactorius; the moderately thick nervus opticus (nII), ending in the eyeball; the nervus oculomotorius (nIII), arising from the base of the midbrain crista cerebellaris region; followed by the moderately thick nervus trochlearis (nIV) innervating the eye extrinsic muscle (Meek & Nieuwenhuys, 1998); and the posteriormost nervus trigeminus (nV), extremely slender, with ramifications not amenable to observation by us. Also in the midbrain section, arising laterally from the base of the rhombencephalon, are the anteriormost nervus fascialis (nVII), followed by the nervus octavus (nVIII), nervus linea lateralis anterior (nlla), nervus glossopharyngeus (nIX), nervus linea lateralis posterior (nllp), and the posteriormost nervus vagus (nX).…”

Section: Brain Gross Morphology Of Brycon Orbignyanusmentioning

confidence: 99%

“…Also in the midbrain section, arising laterally from the base of the rhombencephalon, are the anteriormost nervus fascialis (nVII), followed by the nervus octavus (nVIII), nervus linea lateralis anterior (nlla), nervus glossopharyngeus (nIX), nervus linea lateralis posterior (nllp), and the posteriormost nervus vagus (nX). Also arising from the rhombencephalon, although from its ventral surface, is the nervus abducens (nVI) (Meek & Nieuwenhuys, 1998). The posteriormost nerve is the nervus spino-occipitalis, arising from the medullary base, wide at its origin and progressively narrow distally.…”

Section: Brain Gross Morphology Of Brycon Orbignyanusmentioning

confidence: 99%

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The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

Pereira

Castro

2016

Neotrop. ichthyol.

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The brain of Brycon orbignyanus is described as a model for future studies of the gross morphology of the central nervous system in Characiformes. The study of brain gross morphology of 48 distinct taxa of Characiformes, one of Cypriniformes, two of Siluriformes and two of Gymnotiformes, allowed us to propose, for the first time, six putative brain synapomorphies for the Characiformes and also two possibly unique gross brain morphology characters for the Siluriformes. A detailed protocol for the extraction of the brain in Characiformes is also provided.O encéfalo de Brycon orbignyanus é descrito como um modelo para futuros estudos da anatomia externa do Sistema Nervoso Central de Characiformes. O estudo da morfologia externa de 48 táxons distintos de Characiformes, um de Cypriniformes, dois de Siluriformes e dois de Gymnotiformes, permitiu-nos propor, pela primeira vez, seis prováveis sinapomorfias encefálicas e também duas possíveis características encefálicas para Siluriformes. Um protocolo detalhado para a dissecção e extração do encéfalo de Characiformes é também apresentado.

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Central melatonin receptors in the rainbow trout: Comparative distribution of ligand binding and gene expression

Mazurais

Brierley²,

Anglade

et al. 1999

J. Comp. Neurol.

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To better define the role of melatonin in fish, we have compared in detail the distribution of 2‐[125I]iodomelatonin binding sites with gene expression for melatonin receptor subtypes in a widely studied seasonal species, the rainbow trout. Three distinct partial sequences of the melatonin receptor gene were cloned from trout genomic DNA. Two of the sequences corresponded to the Mel1a receptor subtype, and one corresponded to the Mel1b receptor subtype. Analysis of numerous clones failed to find a sequence equivalent to the Mel1c receptor subtype. Comparison of receptor gene expression with 2‐[125I]iodomelatonin binding distribution indicated dendritic transport of the receptor. Melatonin receptors were associated predominantly with visually related areas of the trout brain, such as the thalamic region, the pretectal area, and the optic tectum. The pituitary was devoid of 2‐[125I]iodomelatonin binding, and melatonin receptor gene expression was not detectable. It would appear from the results of the present study that melatonin in this species is involved primarily in the processing of visual signals. How melatonin interacts with circannual rhythms of growth and reproduction is unclear, although a direct interaction between melatonin and the hypothalamopituitary axis is not clearly indicated. J. Comp. Neurol. 409:313–324, 1999. © 1999 Wiley‐Liss, Inc.

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Holosteans and Teleosts

Cited by 255 publications

References 910 publications

Sexual selection by female choice prevents speciation reversal in a hybridizing trio of mormyrid fish in southern Africa: evidence from playback experiments of electric organ discharges

Sexual selection by female choice prevents speciation reversal in a hybridizing trio of mormyrid fish in southern Africa: evidence from playback experiments of electric organ discharges

The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

Central melatonin receptors in the rainbow trout: Comparative distribution of ligand binding and gene expression

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