Revista de Investigación y Desarrollo Pesquero 2016 Nro 29

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Browsing Revista de Investigación y Desarrollo Pesquero 2016 Nro 29 by Subject "cerebro"

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    Morfometría y topología del cerebro del pez tetra cola roja, Aphyocharax anisitsi (Characiformes: Characidae)
    (Instituto Nacional de Investigación y Desarrollo Pesquero, 2016) Rincón, Laura; Cavallino, Luciano; Alonso, Felipe; Lo Nostro, Fabiana; Pandolfi, Matías
    In this work a histological description of the neuronal nuclei present in the different regions of bloodfin tetra fish Aphyocharax anisitsi brain is presented. In addition, its external morphology studied quantifying the length and area of the main lobes (olfactory bulbs, telencephalic hemisphere, optic lobes and cerebellum) is shown. An ANOVA was performed to determine any possible significant differences among said structures. Ten individuals were fixed in Bouin’s solution and brains dissected to describe the external anatomy and digital image capture. In order to study the internal topology brains were processed for a paraffin histological protocol with microtome sections and Nisslstain. Results indicated the presence of the typical lobes described for other teleost species. The morphometrical analysis showed the optic lobes of the largest area and length and the olfactory bulbs of the smallest size. Said results suggest a predominance of the visual system. The cerebellum presented a larger total length than the telencephalic hemispheres with no differences as regards the area. Concerning the internal topology, it was observed that nuclei were associated to the anterior, medium and posterior brain. The nuclei found in the different regions did not show differences with regard to those described for other members of the Ostariophysi Superorder such as the zebra fish (Danio rerio) or the cardinal tetra (Paracheirodon axelrodi).