Feed training of juvenile giant trahira under different light intensities

Salaro, Ana Lúcia; Tavares, Mateus Moraes; Chaves, William; Campelo, Daniel Abreu Vasconcelos; Zuanon, Jener Alexandre Sampaio; Luz, Ronald Kennedy

doi:10.1590/s1516-35982011001100002

Cited by 9 publications

(12 citation statements)

References 17 publications

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“…Its larviculture has been studied in our laboratory, and high survival rates were registered when Artemia nauplii were used as live food Portella 2002, Luz andPortella 2005a, b). This species does not voluntarily accept formulated feeds (Portella and Dabrowski 2008); however, it is able to accept formulated diet after feed training , Luz 2004, Salaro et al 2011) and, once trained, can be adapted to rearing with commercial diet , Salaro et al 2003, 2006, Nogueira et al 2005, indicating its potential for commercial production.…”

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Effect of prey concentrations and feed training on production of Hoplias lacerdae juvenile

Luz

Portella

2015

An. Acad. Bras. Ciênc.

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The aim of this work was to investigate the effects of daily prey concentration during the first 15 days of active feeding of Hoplias lacerdae larvae, and the juvenile size on the feed training. In the first phase, the larvae received five Artemia nauplii concentrations (P). In the second phase, the juveniles from each treatment were trained to accept formulated diet. Superior growth was related to higher initial daily prey concentrations (900 and 1100 nauplii larvae -1 ). During feed training, the growth tendency was similar to that verified in the first phase. The lowest values of specific growth rate (SGR) were registered after the introduction of the semi-moist diet used in the feed training. However, the values of SGR recovered along the experiment and similar rates were found among the treatments. Survival, mortality and cannibalism were similar in the different treatments at the end of both phases. It can be concluded that: the prey concentration affects growth of H. lacerdae during the first 15 days of active feeding, and feed training can be initialized with juveniles of about 16 mm of total length.

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Effect of prey concentrations and feed training on production of Hoplias lacerdae juvenile

Luz

Portella

2015

An. Acad. Bras. Ciênc.

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“…Saline water was used throughout the experimental period at the concentration of 4 g of common salt L -1 (Cisne ® , Brazilian Industry -390 mg common sodium/g salt, 25 mg of iodine/g of salt) (Salaro et al, 2011). The aquariums for all treatments were covered by a screen of 2 mm in diameter to prevent the escape of fish.…”

Section: Methodsmentioning

confidence: 99%

“…Fish were fed three times a day (06h00, 12h00 and 18h00) to satiety, until the time was not observed over the attack of pellets by the fish. During the feeding of the fish, the aquariums were checked for cannibalism, according to Salaro et al (2011), and dead fish. Every day, at 18h30, 100% of the water volume was exchanged to maintain water quality.…”

Section: Methodsmentioning

confidence: 99%

“…This technique has shown good results for several carnivore species (Kubitza & Losvhisn 1997;Luz et al, 2000;Moura et al, 2000;Salaro et al, 2003;Soares et al, 2007;Salaro et al, 2011) because of the high survival rates, uniformity of size and low rates of cannibalism (Luz et al, 2002;Soares et al, 2007;Feiden et al, 2008;Salaro et al, 2011). This technique requires specialized labor, however, which can make production more expensive.…”

Section: Introductionmentioning

confidence: 99%

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Replacement of moist ingredients in the feed training of carnivorous fish

et al. 2012

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-The study evaluated the replacement of bovine heart by gelatin in the feed training of carnivorous fish, using giant trahira (Hoplias lacerdae) as an experimental model. A completely randomized design with four treatments and five repetitions was employed. The treatments were composed of wet ingredients beef heart (control), gelatin diluted in water, gelatin diluted in beef heart broth, and gelatin diluted in water mixed with fish meal. The fish (3.22±0.03 cm and 0.57±0.01 g) were conditioned to accept industrialized diets by the technique of gradual feed ingredients transition in the diet. Gains in weight and length, efficiency of feed training, specific growth rate, cannibalism, mortality and survival rates were evaluated. There was significant difference in weight and length gains and specific growth rate, whereby the use of bovine heart gave the best results. Greater efficiency of feed training was observed for fish fed diets containing beef heart and gelatin diluted in water mixed with fish meal. The high survival rates and the absence of significant differences among treatments for rates of cannibalism, mortality and survival indicate the feasibility of using gelatin as a moist ingredient in the feed training of carnivorous fish.

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“…During feeding, the tanks were uncovered for a period of 5 minutes, for live fish to be quantified and dead fish, removed. Probable cases of cannibalism (ripped animals) were recorded following the methodology of Salaro et al (2011).…”

Section: Methodsmentioning

confidence: 99%