Avaliação comportamental da ingestão hídrica e mecanismos neuroendócrinos envolvidos no controle do balanço hidroeletrolítico em codornas japonesas (Coturnix coturnix japonica)

Silveira, Mayra Dias

Please use this identifier to cite or link to this item: https://rima.ufrrj.br/jspui/handle/20.500.14407/11398

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DC Field	Value	Language
dc.contributor.author	Silveira, Mayra Dias
dc.date.accessioned	2023-12-22T01:52:17Z	-
dc.date.available	2023-12-22T01:52:17Z	-
dc.date.issued	2019-08-30
dc.identifier.citation	SILVEIRA, Mayra Dias. Avaliação comportamental da Ingestão hídrica e mecanismos neuroendócrinos envolvidos no controle do balanço hidroeletrolítico em codornas japonesas (Coturnix coturnix japonica). 2019. 41 f. Dissertação (Mestrado em Ciências Fisiológicas) - Instituto de Ciências Biológicas e da Saúde, Departamento de Ciências Fisiológicas, Universidade Federal Rural do Rio de Janeiro, Seropédica, 2019.	por
dc.identifier.uri	https://rima.ufrrj.br/jspui/handle/20.500.14407/11398	-
dc.description.abstract	A diminuição dos fluidos corporais pode ser ocasionada pela privação hídrica e com isso, mecanismos de controle e regulação são ativados de forma a garantir a manutenção do equilíbrio hidroeletrolítico, dentre eles a secreção de hormônios neurohipofisários. A privação hídrica em aves é um importante estímulo estressor que provoca uma ampliação da atividade dos neurônios dos NPV e NSO, denominados magnocelulares, e consequentemente um aumento no comportamento da ingestão de água em aves. Com isso, a privação hídrica se torna um modelo experimental conveniente para os estudos da atividade vasotocinérgica e mesotocinérgica, assim como estudos da interação desses peptídeos com seus respectivos receptores e sua ação central e sistêmica. Desta forma, o presente estudo investigou as possíveis correlações entre a atividade vasotocinérgica e mesotocinérgica em aves com as alterações comportamentais entre o mecanismo de sede e da ingestão de água, através de modelo experimental desenvolvido com codornas japonesas (Coturnix coturnix japonica), submetendo os grupos experimentais à privação hídrica. Foram utilizados codornas machos de aproximadamente 50 dias, mantidos sob temperatura controlada de 26±2ºC, ciclo claro-escuro de 12/12 horas, subdivididas em três grupos distintos (n=6): i.Grupo Controle (CTRL), ii.Grupo Privado Hidricamente por 36 horas (PvH) e iii.Grupo Privado Hidricamente por 36 horas com Reapresentação de água durante duas horas (IH-2h). Verificamos que a privação hídrica foi capaz de aumentar a ingestão hídrica do grupo IH-2h, para todos os intervalos de tempo observados, quando comparado ao grupo CTRL e ao grupo IH-2 antes da privação (IH-2h após privação vs CTRL, p < 0,0001; IH-2h após privação vs IH-2h antes da privação, p < 0,0001). O grupo PvH demonstrou diferença estatisticamente significativa quando comparado ao grupo CTRL na ingestão basal de água no tempo de 120 minutos (PvH 3,56±1,36 vs CTRL 0,79±0,29; p = 0,002). Houve redução do peso corporal de maneira significativa dos grupos PvH e IH-2h, quando considerada a variação de ganho de peso antes e após privação (PvH após privação vs CTRL, p < 0,0001 e IH-2h após privação vs CTRL, p<0,0001). Deste modo, o presente estudo foi capaz de demonstrar resultados positivos com relação ao comportamento ingestivo de água e suas possíveis influências no ganho de peso corporal da espécie após privação hídrica. Embora os resultados dos parâmetros plasmáticos avaliados neste estudo não permitam afirmar que mecanismos de controle neuroendócrino vasotocinérgico e mesotocinérgico estejam envolvidos na privação hídrica, sugerimos que a ação dos hormônios AVT e MT tem importância impar no controle de líquidos corporais. Estudos posteriores são necessários, para que se possa elucidar o papel desses e outros hormônios envolvidos da osmorregulação de codornas japonesas.	por
dc.description.sponsorship	CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior	por
dc.format	application/pdf	*
dc.language	por	por
dc.publisher	Universidade Federal Rural do Rio de Janeiro	por
dc.rights	Acesso Aberto	por
dc.subject	Comportamento Ingestivo	por
dc.subject	Osmorregulação	por
dc.subject	Controle Neuroendócrino	por
dc.subject	Ingestive Behavior	eng
dc.subject	Osmoregulation	eng
dc.subject	Neuroendocrine Control	eng
dc.title	Avaliação comportamental da ingestão hídrica e mecanismos neuroendócrinos envolvidos no controle do balanço hidroeletrolítico em codornas japonesas (Coturnix coturnix japonica)	por
dc.title.alternative	Behavioral evaluation of water intake and neuroendocrine mechanisms involved in hydroelectrolytic balance control in japanese quails (Coturnix coturnix japonica)	eng
dc.type	Dissertação	por
dc.description.abstractOther	The decrease of the body fluids can be caused by water deprivation and, therefore, control and regulation mechanisms are activated in order to ensure the maintenance of hydroelectrolytic balance, among them the secretion of neurohypophyseal hormones. Water deprivation in birds is an important stress stimulus that causes an increase in the activity of NPV and NSO neurons, called magnocellular cells, and consequently an increase in water intake behavior in birds. Thus, water deprivation becomes a convenient experimental model for studies of vasotocinergic and mesotocinergic activity, as well as studies of the interaction of these peptides with their respective receptors and their central and systemic action. Thus, the present study investigated the possible correlations between vasotocinergic and mesotocinergic activity in birds with behavioral changes between thirst mechanism and water intake, through an experimental model developed with Japanese quails (Coturnix coturnix japonica), submitting the experimental groups an water deprivation. Male quails of approximately 50 days were used, maintained at a controlled temperature of 26 ± 2ºC, under a photoperiod of 12/12 hours, subdivided into 3 distinct groups (n = 6): Control Group (CTRL), Water Deprivation for 36 hours (PvH) and Water Deprivation for 36 hours with 2 hours of water presentation (IH-2h). We found that water deprivation was able to increase the water intake of the IH-2h group for all observed time intervals when compared to the CTRL group and the IH-2 group before deprivation (IH-2h after deprivation vs CTRL, p IH-2h after deprivation vs IH-2h before deprivation, p <0.0001). The PvH group showed a statistically significant difference when compared to the CTRL group in basal water intake at 120 minutes (PvH 3,56±1,36 vs CTRL 0,79±0,29; p = 0,002). There was a significant reduction in body weight in the PvH and IH-2h groups when considering the variation in weight gain before and after deprivation (PvH after deprivation vs CTRL, p <0.0001 and IH-2h after deprivation vs CTRL, p <0.0001). Thus, the present study was able to demonstrate positive results regarding water ingestive behavior and its possible influences on species body weight gain after water deprivation. Although the results of the plasma parameters evaluated in this study do not allow us to confirm that the vasotocinergic and mesotocinergic neuroendocrine control mechanisms are involved in water deprivation, but we suggest that the action of the hormones AVT and MT is extremely important in the body fluids control. Further studies are needed to elucidate the role of these and other hormones involved in the osmoregulation of Japanese quails.	eng
dc.contributor.advisor1	Reis, Luis Carlos
dc.contributor.advisor1ID	CPF: 484.252.577-00	por
dc.contributor.referee1	Côrtes, Wellington da Silva
dc.contributor.referee2	Mercez, Pedro Leonardo Cedraz
dc.creator.ID	CPF: 136.777.657-06	por
dc.creator.Lattes	http://lattes.cnpq.br/0338512431674922	por
dc.publisher.country	Brasil	por
dc.publisher.department	Instituto de Ciências Biológicas e da Saúde	por
dc.publisher.initials	UFRRJ	por
dc.publisher.program	Programa de Pós-Graduação em Ciências Fisiológicas	por
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dc.subject.cnpq	Fisiologia	por
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dc.originais.uri	https://tede.ufrrj.br/jspui/handle/jspui/5324
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