Uso de sal durante o transporte de juvenis (1kg) de pirarucu (Arapaima gigas)

Abstract

O pirarucu é um peixe nativo da bacia Amazônica cuja criação vem sendo estudada em algumas partes do Brasil. O objetivo desse trabalho foi testar o sal de cozinha como mitigador de estresse durante o transporte de juvenis de pirarucu (1 kg). Para isso, os peixes foram transportados em dois diferentes sistemas: caixas sem adição de oxigênio (transporte aberto) e sacos plásticos com injeção de oxigênio e lacrado (transporte fechado). Nos dois sistemas os peixes foram transportados em três diferentes tratamentos: controle e duas concentrações de sal na água (3 e 6 g.L -1). Após o transporte os peixes foram colocados em viveiros para avaliação da recuperação. Foram analisados parâmetros do metabolismo energético (cortisol, glicose e lactato) e de hematologia (hematócrito). O sal de cozinha não foi eficiente em mitigar as respostas de estresse no transporte em nenhum dos dois sistemas de transporte estudados.PALAVRAS-CHAVE: Pirarucu, Transporte, Estresse, Cortisol, Lactato, Glicose. Use of salt during the transportation of pirarucu juveniles (1kg) (Arapaima gigas) ABSTRACTPirarucu is a native fish of the Amazon basin, widely used in culture systems in some parts of Brazil. The objective of this work was to test table salt as a stress mitigator during transportation of pirarucu juveniles (1kg). Fish were transported by two different systems: boxes without addition of oxygen (open system) and closed oxygen filled plastic bags (closed system). To both systems fish were transported at three different treatments: control and two table salt concentration (3 and 6 g.L -1 ). After transportation, fish were stocked in ponds to monitor recovery. Metabolic (cortisol, glucose and lactate) and hematological (hematocrit) parameters were analyzed. The table salt was not efficient in mitigating stress response during the both tested transport system.

<b>Long-term transportation of juvenile pacamãs <i>Lophiosilurus alexandri</i> at different densities

“…A similar result was reported in a previous study of the same species using juveniles with an average weight of 2.52 g stocked at a density of 54 animals in 5 L of water for 7.5 hours . Moreover, similar results were found by Adamante et al (2008) who recommended 12-hour transportation at a density of 15 g fish L -1 for juvenile S. brasiliensis with an average weight of 0.71 g. The absence of mortality during transportation found in this study was also recorded for pirarucu (Arapaima gigas), but with a shorter transportation time of 3 hours (Brandão, Gomes, Crescêncio, & Carvalho, 2008). Therefore, the present study can contribute to the success of fish farming programmes of juvenile pacamã using long-term transportation.…”

Transporting live silver catfish (Rhamdia quelen) with salt addition does not mitigate fish stress and negatively affects meat quality

“…Reports on the effect of NaCl addition in transport water on cortisol levels in fish are species-dependent. Similarly to the present study, Brandão et al (2008) and Gomes et al (2006) did not found significant differences in plasma cortisol levels in pirarucu (Arapaima gigas) juveniles transported in water containing NaCl. Therefore, these authors did not observe a reduction in transport-induced stress.…”

“…An increase in plasma glucose is a secondary effect to stress response in fish. According to Brandão et al (2008) an immediate increase in glucose in response to stress is caused by the secretion of catecholamines, especially epinephrine, which stimulates glycogenolysis. Catecholamines are the primary cause of elevated plasma glucose, and corticosteroids can contribute to the maintenance of glycemia (Dba et al, 2009), which provides energy for fish to escape, or to respond to other stressful situations (Wendelaar Bonga, 1997).…”

<b>Physiological and hematological responses of Nile tilapia (<i>Oreochromis Niloticus</i>) to different anesthetics during simulated transport conditions

“…These routine procedures can generate various stressors that have the potential to affect the performance and welfare of the fish (Takahashi, Abreu, Biller, & Urbinati, 2006;Vidal et al, 2008;Weber, Peleteiro, Martín, & Aldegunde, 2009;Delbon & Paiva, 2012 physiological functions is, therefore, crucial in maintaining the welfare of the fish throughout the production process (Ueta, Suzuki, Sugimoto, Uchida, & Mashimo, 2007;Brandão, Gomes, Crescêncio, & Carvalho, 2008;Adamante, Nuñer, Barcellos, Soso, & Finco, 2008). The physiological responses of fish to stressors are generally classified as primary and secondary (Gonçalves, Santos, Fernandes, & Takahashi, 2008;Zahl, Kiessling, Samuelsen, & Hansen, 2009), and each of these is associated with alterations in specific hematological or biochemical parameters that may be employed as stress indicators (Barbosa, Moraes, & Inoue, 2007;Morgan & Iwama, 1997).…”