Hematological and biochemical characteristics during the transport of dog snapper Lutjanus jocu (Perciformes: Lutjanidae)

Oliveira, Bruno; Souza, Rodrigo Matos de; Filho, J. P. Silva; Gomes, Levy Carvalho; Fernandes, Luiz Fernando Loureiro

doi:10.1590/1982-0224-20170140

Cited by 4 publications

(1 citation statement)

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“…Higher post-transportation lactate levels indicate lactic acid accumulation due to increased physical activity (Barton et al 2002;Dobsikova et al 2009), which is possibly related to capture, handling and confinement stress during transportation (Harmon 2009;Iversen et al 2005;Portz et al 2006). This further stresses the need to use anaerobic metabolism when the aerobic metabolism cannot provide fish with enough energy (Oliveira et al 2018). Additionally, increased unionized ammonia in the water may result from fish agitation (Portz et al 2006), and, consequently, higher lactate levels after transportation.…”

Section: Discussionmentioning

confidence: 99%

Effect of density of fingerling and juvenile pirarucu during transportation on water quality and physiological parameters

et al. 2020

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We assessed the effect of stocking density on physiological parameters (blood lactate, glucose, cortisol, hematocrit), water quality (temperature, dissolved oxygen, pH, unionized ammonia, carbon dioxide), and survival during the transportation of fingerling (24.5 ± 4.7 g) and juvenile (615.8 ± 122.2 g) pirarucu (Arapaima gigas) for six hours in plastic bags. The tested densities were 65, 80, 95, 110 and 125 g L-1 for fingerlings, and 50, 80, 110, 140 and 170 g L-1 for juveniles (three replicates each). Parameters were measured prior to and immediately after transportation, and at 24 and 96 hours recovery after transportation. No mortality was observed, except for fingerlings (< 3%) at densities of 110 and 125 g L-1 during recovery. All the water quality parameters were significantly altered after the transportation of fingerlings and juveniles. Water temperature, dissolved oxygen, carbon dioxide and unionized ammonia increased, but pH decreased. Only carbon dioxide and unionized ammonia differed among densities. Cortisol levels did not increase over time, except for the juveniles at 170 g L-1, which still had high cortisol after 96 hours. Glucose significantly increased after transportation for all the treatments and returned to the initial values during the recovery period. Conversely, the lactate values were still high after 96 hours. Hematocrit was assessed only for juveniles and was significantly lower after transportation. We conclude that fingerling and juvenile pirarucu can be safely transported at densities up to 95 g L-1 and 140 g L-1, respectively.

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