Data/hora: 10/06/2024 01:14:33

Provedor de dados: | 36
País: | Brazil
Título: | Effect of density of fingerling and juvenile pirarucu during transportation on water quality and physiological parameters
Autores: | LIMA,Adriana Ferreira; OLIVEIRA,Hyago Jovane Borges de; PEREIRA,André Silvério; SAKAMOTO,Silmara Sanae.
Data: | 2020-09-01
Ano: | 2020
Palavras-chave: | Arapaima gigas; Closed system; Lactate; Cortisol; Glucose.
Resumo: | ABSTRACT 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 (&lt; 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000300223
Editor: | Instituto Nacional de Pesquisas da Amazônia
Relação: | 10.1590/1809-4392202000302
Formato: | text/html
Fonte: | Acta Amazonica  v.50 n.3 2020
Fonte: | info:eu-repo/semantics/openAccess