Alimentação e comportamento de larvas de pacu, Piaractus mesopotamicus (Holmberg, 1887)

Beerli, Eduardo Lopes; Rosa, Philippe; Freitas, Rilke Tadeu Fonseca de

doi:10.1590/s1413-70542004000100020

Cited by 9 publications

(7 citation statements)

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“…Mouth opening and filling of the swimming bladders occurred simultaneously, as larvae were able to swallow air to inflate the gas bladder (Pinder & Gozlan, 2004). The development of fins facilitates balance and direction in the water column, being also responsible for the swimming behaviour changes in other species (Santos, 1992; Santos & Godinho, 2002; Beerli et al , 2004; Mukai et al , 2010).…”

Section: Discussionmentioning

confidence: 99%

Early development and allometric growth patterns of the grumatã (Prochilodus vimboidesKner, 1859)

Souza

Melo

Caramaschi

et al. 2015

Zygote

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The objective of this study was to characterize the early development and allometric growth of the grumatã (Prochilodus vimboides). We describe a sample of 266 eggs and larvae obtained through induced spawning. The eggs were spherical (mean 3.7 mm diameter), exhibited a yellow yolk and were non-adhesive and pelagic after fertilization and hydration. The time elapsed between the early cleavage and post-flexion stages was considered short (328 hours, 8054 hour-degrees) in regard to the development times of other Neotropical rheophilic species, but time to hatching was considerably longer than in other Prochilodus species. The most notable anatomical changes were observed between the end of the yolk larval stage and the beginning of the pre-flexion stage, when the larvae displayed directed swimming and the digestive system became functional, enabling the transition from endogenous to exogenous feeding. After hatching, the larvae grew from 6.04 to 15.15 mm in total length average. Two growth phases were observed at this stage: a non-linear asymptotic curve in yolk-sac larvae, and a linear constant-rate growth phase after exogenous feeding started. Allometric growth related to standard length was positive for head length, negative for eye diameter, and switched between phases from negative to positive in body depth and head height. Morphological development and allometric growth in different larval phases impose drastic anatomical and physiological changes that are synchronic with habitat changes and the flood cycles during the reproductive period.

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Section: Discussionmentioning

confidence: 99%

Early development and allometric growth patterns of the grumatã (Prochilodus vimboidesKner, 1859)

Souza

Melo

Caramaschi

et al. 2015

Zygote

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“…Apesar das vantagens apresentadas pelo uso de dieta artificial (Dias, 1989), os resultados obtidos para crescimento e ganho de peso de larvas do jundiá, R. quelen, no presente estudo não foram satisfatórios, comparando-se com as diferentes formas de A. salina utilizadas. Isto sugere uma baixa capacidade de larvas do jundiá em digerir alimentos complexos contidos em dietas artificiais, assim como observado para o pacu, Piaractus mesopotamicus, considerando o baixo desenvolvimento alcançado com dieta artificial em relação ao alimento vivo (Beerli et al, 2004).…”

Section: Discussionunclassified

“…No controle do fotoperíodo, a intensidade luminosa foi reduzida para inibir o canibalismo entre larvas do jundiá (Behr et al, 1999), sendo adotado o regime de penumbra com níveis de intensidade luminosa abaixo de 10 lux durante o dia, monitorado por Luximetro (Instrutherm -LD 209), sendo a luz ausente durante a noite.…”

Section: Materiais E Métodosunclassified

Crescimento e sobrevivência de larvas do jundiá, Rhamdia quelen, alimentadas com alimento vivo enriquecido e dieta artificial

Borges¹,

Dutra²,

Ballester³

et al. 2013

RBCV

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O objetivo do presente estudo foi avaliar a utilização de dieta inerte e do alimento vivo Artemia salina durante a larvicultura do jundiá Rhamdia quelen. As larvas foram alimentadas de acordo com os seguintes tratamentos: náuplios de A. salina (T1), metanáuplios (T2), metanáuplios enriquecidos com ácidos graxos (T3), metanáuplios enriquecidos com ácidos graxos e vitamina C (T4) e dieta artificial (T5). O delineamento foi inteiramente casualizado com cinco tratamentos e quatro repetições (5x4). As larvas foram alimentadas quatro vezes ao dia, em densidade de estocagem de 10 larvas por litro. Os parâmetros de desempenho utilizados foram sobrevivência, ganho de peso, crescimento final e desenvolvimento morfológico. Ao fim do experimento, considerando os resultados obtidos, pôde-se concluir que os tratamentos com o uso de A. salina foram satisfatórios, apresentando sobrevivência acima de 80% e bons índices de desempenho, atingindo peso médio final de 0.011 ± 0.004g e comprimento médio final de 7.150 ± 1.02 mm (P<0,05) para o tratamento com náuplios de Artemia. A dieta inerte utilizada não é recomendada para a larvicultura do jundiá, favorecendo o canibalismo e reduzindo significativamente a sobrevivência e crescimento.

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“…Most fish larvae require planktonic organisms as their first feed and record better growth and survival rates when fed these organisms rather than artificial diets [5,10,[23][24][25][26]. Several factors explain these results: the structure and digestibility of the protein, presence of exogenous enzymes, chemical stimuli, adequate size, and slow movements of the prey that facilitate its ingestion and digestion, characteristics that meet the requirements of the larva [27].…”

Section: Introductionmentioning

confidence: 99%

Management of the First Feeding of Dorada Brycon sinuensis with Two Species of Cladocerans

et al. 2021

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The management of the first feeding is a critical stage in the viability of the larvae and fingerling rearing. So far, the first feeding of the bryconids record the best results when fed with forage larvae; thus, the aim was to evaluate two species of cladocerans as live prey in the first feeding of dorada Brycon sinuensis and to evaluate their effects on the control of cannibalism. Larvae (1.2 ± 0.15 mg and 5.9 ± 0.4 mm initial weight and total length) were fed Moina minuta (Mm), Macrothrix elegans (Me) or a mixture (50:50) of cladocerans (Mix) at a rate of 20 prey mL−1, once for 24 h. Another dorada larvae group were fed newly hatched larvae of Piaractus brachypomus (4.5 ± 0.9 mm) as forage larvae (FL) in a ratio of 2:1 (prey: predator). The larvae were stocked to 50 L−1 in aquaria with 5 L of useful volume (12 per treatment). The growth, survival, stress resistance, cannibalism mortality, and the number of prey in the gut contents were analyzed. Dorada larvae fed FL showed higher growth, but those fed Mm showed the highest survival rate (76.1 ± 6.6%) and the lowest cannibalism mortality (16.8 ± 3.7%) (p < 0.05). The use of the cladocerans allowed high survival and stress resistance (95.3 ± 2.4%), and M. minuta proved to be a suitable prey for cannibalism control in the management of the first feeding of dorada larvae.

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Alimentação e comportamento de larvas de pacu, Piaractus mesopotamicus (Holmberg, 1887)

Cited by 9 publications

References 0 publications

Early development and allometric growth patterns of the grumatã (Prochilodus vimboidesKner, 1859)

Early development and allometric growth patterns of the grumatã (Prochilodus vimboidesKner, 1859)

Crescimento e sobrevivência de larvas do jundiá, Rhamdia quelen, alimentadas com alimento vivo enriquecido e dieta artificial

Management of the First Feeding of Dorada Brycon sinuensis with Two Species of Cladocerans

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