Loading and transport stress of juvenile matrinxã ( Brycon cephalus, Characidae) at various densities

Loading and transport stress of juvenile matrinxã ( Brycon cephalus, Characidae) at various densities

Physiological responses of matrinxã juveniles were determined after the procedures of capture, loading and 4-h transportation at densities of 83, 125 and 166 g l −1. The experiment was carried out during the regular procedures of the local hatcheries, repeating the real conditions of transportation....

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Bibliographic Details
Published in:Aquaculture Vol. 229; no. 1; pp. 389 - 400
Main Authors: Urbinati, Elisabeth Criscuolo, de Abreu, Janessa Sampaio, da Silva Camargo, Antônio Cleber, Landinez Parra, Miguel Angel
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 12-01-2004
Elsevier Science
Elsevier Sequoia S.A
Subjects:
Animal aquaculture
Animal productions
Aquaculture
Biological and medical sciences
Brycon cephalus
Characidae
Fish
Fish density
Freshwater
Fundamental and applied biological sciences. Psychology
General aspects
Loading
Stress
Transport
Transport
Loading
Fish density
Stress
Vertebrata
Pisces
Population density
Aquaculture
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Summary:Physiological responses of matrinxã juveniles were determined after the procedures of capture, loading and 4-h transportation at densities of 83, 125 and 166 g l −1. The experiment was carried out during the regular procedures of the local hatcheries, repeating the real conditions of transportation. Blood samples were collected from the fish before loading in plastic bags—control (BL), after loading (AL), immediately after 4 h of transport (AT) and additionally 24 and 96 h after transport to assess the recovery period. The physiological indicators of the stress were blood glucose, cortisol and chloride levels, osmolality, hematocrit and red cell counting. Condition factor and mortality were also determined. Blood glucose increased slightly AL and significantly AT, returning to the basal values 24 h after, similarly in all densities. Plasma cortisol levels elevated AL in the plastic bags and AT but not significantly compared to the basal values. These concentrations decreased inversely to the densities. Plasma chloride concentrations were lower AT in all densities. Plasma osmolality increased equally in all densities, becoming different from the initial level at 96 h. In general, fish transported at the two highest densities showed higher values of osmolality. Hematocrit increased AL, maintaining levels slightly high until the end of the experiment. No differences were verified in the number of erythrocytes. Condition factor was higher for fish from all densities at 96 h AT. There was no fish mortality and water quality was kept within acceptable values for matrinxã culture.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0044-8486
1873-5622
DOI:10.1016/S0044-8486(03)00350-8