Frequência alimentar e taxa de arraçoamento durante o condicionamento alimentar de juvenis de pacamã

Abstract

Resumo -O objetivo deste trabalho foi avaliar a frequência alimentar e a taxa de arraçoamento durante o condicionamento alimentar de juvenis de pacamã. A alimentação de três e quatro vezes ao dia e as taxas de arraçoamento de 50, 75 e 100% da biomassa foram testadas. O manejo alimentar não afetou o crescimento, a sobrevivência, a mortalidade e o canibalismo dos peixes. A ausência de efeito do manejo se manteve quando os animais foram alimentados com ração extrusada, três vezes ao dia, durante 30 dias. A taxa de arraçoamento de 50% da biomassa e a alimentação por três vezes ao dia podem ser utilizadas no condicionamento alimentar de juvenis de pacamã.Termos para indexação: Lophiosilurus alexandri, canibalismo, frequência alimentar, taxa de arraçoamento. Feeding frequency and rate during feed training of Pacamã juvenilesAbstract -The objective of this work was to evaluate feeding frequency and rate during feed training of pacamã juveniles. Feeding for three or four times a day and the feeding rates at 50, 75 and 100% of biomass were tested. Feeding management did not affect fish growth, survival, mortality, and cannibalism. Lack of management effect was kept when animals were fed extruded feed threefold a day, during 30 days. Feeding rate at 50% of biomass and threefold-a-day feeding can be used for the feed training of pacamã juveniles.

Development, nutrition, and rearing practices of relevant catfish species (Siluriformes) at early stages

“…This species is considered vulnerable to extinction, 47 although it has not yet been classified by the IUCN. In this context, efforts have been made to improve the production of fingerlings for restocking programmes in the Rio São Francisco basin, 48‐51 as well as for human consumption 52,53 . No hybrids with other catfish species have been reported.…”

“…Thus, the authors recommended weaning fish (7 specimens L −1 ) by feeding them three times a day (at 9, 13, and 17 h) at a daily feeding rate of 50% SB (survival rates: 56–67%). This feeding strategy in RAS contributed to reducing labour costs associated with tank cleaning and maintenance and minimised water quality problems 52 …”

“…to improve the production of fingerlings for restocking programmes in the Rio São Francisco basin, [48][49][50][51] as well as for human consumption. 52,53 No hybrids with other catfish species have been reported.…”

FREQUí­Å NCIA ALIMENTAR NA CRIAÇÃO DE JUVENIS DE SURUVI <i>Steindachneridion scriptum</i>

“…The effects of feeding frequency on the growth of Brazilian native catfish have been analyzed for the surubim Pseudoplatystoma corruscans (Bogiane et al, 2018), silver catfish Rhamdia quelen (Canton et al, 2007), and pacamã Lophiosilurus alexandri (Silva et al, 2014). These effects were also analyzed for nonnative catfish bred in Brazil, such as the African catfish Clarias gariepinus (Aderolu et al, 2010), channel catfish Ictalurus punctatus (Jarboe and Grant, 1996), and Asian catfish Pangasius hypophthalmus (Hung et al, 2001).…”

<b>Long-term transportation of juvenile pacamãs <i>Lophiosilurus alexandri</i> at different densities

“…Increasingly, the generation of new procedures and equipment has led to a positive effect on transportation of live fish (Takahashi, Abreu, Biller, & Urbinati, 2006;Ribeiro, et al, 2013;Silva, Cordeiro, Costa, Takata, & Luz, 2014;Navarro et al, 2016). According to Grottum, Staurnes and Sigholt (1997), the main factor affecting transportation success requires knowledge of the greatest possible fish density for a small amount of water for successful carriage so that there is no mortality or water quality impairment (temperature, oxygen concentration, and ionic constitution), which are important factors for a successful production chain.…”