Autor(es):
Diniz, Daniel Guerreiro ; Siqueira, Lucas Silva de ; Henriques, Ediely Pereira ; Pereira, Patrick Douglas Corr?a ; Diniz, Cristovam Guerreiro ; Abreu, Cintya Castro de ; Magalh?es, Nara Gyzely de Morais ; Soares, Gabrielly Lisboa da Silva ; Paix?o, Peterson Emmanuel Guimar?es ; Meneses, Juliana Oliveira ; Couto, M?rcia Val?ria Silva do ; Sousa, Natalino ; Cunha, Fernanda dos Santos ; Diniz, Cristovam Wanderley Pican?o ; Fujimoto, Rodrigo Yudi
Data: 2020
Origem: Oasisbr
Assunto(s): Peixes / anatomia & histologia; Enc?falo / anatomia & histologia; Plasticidade Neuronal; Tectum ?ptico; Fracionador ?ptico; Pterophyllum scalare; Estereologia Telenc?falo; Peixes / anatomia & histologia; Peixes / anatomia & histologia; Enc?falo / anatomia & histologia; Enc?falo / anatomia & histologia; Plasticidade Neuronal; Plasticidade Neuronal; Tectum ?ptico; Tectum ?ptico; Fracionador ?ptico; Fracionador ?ptico; Pterophyllum scalare; Pterophyllum scalare; Estereologia Telenc?falo; Estereologia Telenc?falo
Descrição
EMBRAPA (Aracaju-SE), National Council of Scientific and Technological Development (CNPq) for financial support to R.Y. Fujimoto (CNPq 304533/2019-0), and to UFPA/HUJBB, LNI (UFPA/Bel?m) and LBN (IFPA/Bragan?a).
Universidade Federal do Par?. Hospital Universit?rio Jo?o de Barros Barreto. Laborat?rio de Neurodegenera??o e Infec??o. Bel?m, PA, Brazil / Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Laborat?rio de Miscroscopia Eletr?nica. Ananindeua, PA, Brasil.
Instituto Federal de Educa??o Ci?ncia e Tecnologia do Par? - Campus Bragan?a. Laborat?rio de Biologia Molecular e Ambiental. Bragan?a, PA, Brazil.
Instituto Federal de Educa??o Ci?ncia e Tecnologia do Par? - Campus Bragan?a. Laborat?rio de Biologia Molecular e Ambiental. Bragan?a, PA, Brazil.
Instituto Federal de Educa??o Ci?ncia e Tecnologia do Par? - Campus Bragan?a. Laborat?rio de Biologia Molecular e Ambiental. Bragan?a, PA, Brazil.
Instituto Federal de Educa??o Ci?ncia e Tecnologia do Par? - Campus Bragan?a. Laborat?rio de Biologia Molecular e Ambiental. Bragan?a, PA, Brazil.
Instituto Federal de Educa??o Ci?ncia e Tecnologia do Par? - Campus Bragan?a. Laborat?rio de Biologia Molecular e Ambiental. Bragan?a, PA, Brazil.
Universidade Federal do Par?. Hospital Universit?rio Jo?o de Barros Barreto. Laborat?rio de Neurodegenera??o e Infec??o. Bel?m, PA, Brazil.
Universidade Federal do Par?. Hospital Universit?rio Jo?o de Barros Barreto. Laborat?rio de Neurodegenera??o e Infec??o. Bel?m, PA, Brazil.
Universidade Tiradentes. Aracaju, SE, Brazil.
Universidade Tiradentes. Aracaju, SE, Brazil.
Universidade Federal do Par?. Bel?m, PA, Brazil.
Universidade Federal do Par?. Bel?m, PA, Brazil.
Universidade Federal de Alagoas. Penedo, AL, Brazil.
Universidade Federal do Par?. Hospital Universit?rio Jo?o de Barros Barreto. Laborat?rio de Neurodegenera??o e Infec??o. Bel?m, PA, Brazil.
Embrapa Tabuleiros Costeiros. Aracaju, SE, Brazil.
Based on previous evidence that environmental enrichment is associated with telencephalic cellular proliferation and that stable visuotopic tectal circuits are essential for discrimination of placement and identity of stationary or moving objects in the visual field, differential plasticity is expected in these areas. Here we tested this hypothesis in the Angelfish (Pterophyllum scalare), a species of ornamental fish with great value in the aquarist trade. We hypothesized that total telencephalic cell number would increase under the influence of an enriched environment whereas the tectal cell number would not change. To test this hypothesis, 12 aquaria of 80 l each were used, with six fish in each. The aquaria had either an enriched environment (EE) including stones, plants, sand and the presence of another fish from the Loricariidae family for interspecific social interaction, or an impoverished environment (IE), in which stimuli were limited to intraspecific interactions in a barren aquarium. After 62 days, six fish from each treatment were euthanized, and their brains were fixed and sectioned for Nissl staining. Then, stereological estimates of the total number of cells were performed. The fish showed no differences in weight gain, feed conversion ratio, condition factor, specific growth rate or survival. Animals kept in the enriched environment had a higher number of total telencephalic cells than animals kept in the impoverished environment (1,038,555 ? 65,357 vs. 758,331 ? 51,587, bilateral t-test, p = 0.008), but a similar number of tectal optical cells (EE 424,097 ? 29,914 vs. IE 471,409 ? 50,850, bilateral t-test, p = 0.445752). We concluded that cell proliferation in response to stimulation by the enriched environment is differentially expressed in the telencephalon and tectal areas of Pterophyllum scalare.
