Development of trairão (Hoplias lacerdae) fingerlings in darkness - DOI: 10.4025/actascibiolsci.v28i1.1058 / Desenvolvimento de alevinos de trairão (Hoplias lacerdae) na ausência de luz - DOI: 10.4025/actascibiolsci.v28i1.1058
Lúcia Salaro, Ana; Kennedy Luz, Ronald; Alexandre Sampaio Zuanon, Jener; Nardez Sirol, Rodolfo; Sakabe, Róberson; Azis Garcia de Araújo, Wagner; Ferri Souto, Eduardo.
Acta sci., Biol. sci
; 28(1): 47-50, 2006.
Artículo
en Portugués
|
LILACS-Express
| ID: biblio-1460395
Sixty-six trairão (Hoplias lacerdae) fingerlings (average weight of 2.0±0.5 g and total length of 5.8±0.2 cm), trained to accept dry rations, were allotted to six 15-L aquariums, with aeration and controlled temperature (24.0±0.5ºC), in a density of 0.7 juveniles/L, aiming to evaluate the effects of darkness on fish productive performance. The treatments consisted of two photoperiods 12 hours light 12 hours dark (12L12D) and 0 hour light 24 hours dark (0L24D), with three replicates. Fingerlings were fed ad libitum a commercial extruded diet (42% CP), twice a day. The aquariums were cleaned daily for excrement withdrawal through siphoning, exchanging » total volume. At the end of the experiment (30 days), weight gain, feedgain ratio and survival and cannibalism rates were evaluated. The results showed that darkness did not affect the productive performance of trairão juveniles
Biblioteca responsable:
BR68.1
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