Effects of delayed first feeding on growth of the silver catfish larvae Rhamdia voulezi (Siluriformes: Heptapteridae)

Lima, Ariane Furtado de; Andrade, Fernanda Freitas; Pini, Suelen Fernanda Ranucci; Makrakis, Sérgio; Makrakis, Maristela Cavicchioli

doi:10.1590/1982-0224-20160027

Cited by 7 publications

(4 citation statements)

References 31 publications

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“…A gradual increase in expression throughout development was also reflected by Mmp2 (Figure ), indicating an increased need for ECM remodeling and tissue morphogenesis, such as needed for muscle growth and swimming physiology (Michelin et al, ), all of which are crucial for survival after hatching. Three genes involved in bone remodeling ( Ets2 , Sparc , and Timp2 ) also increased at the onset of active feeding (Lima, Andrade, Pini, Makrakis, & Makrakis, ). It is worth noting the higher expression of genes involved in skeletogenesis may reflect previous findings suggesting that benthivoros charr embryos tend to allocate more energy toward bone development than do pelagic planktivorous charr embryos (Eiríksson et al, ).…”

Section: Discussionmentioning

confidence: 99%

Gene expression in the phenotypically plastic Arctic charr (Salvelinus alpinus): A focus on growth and ossification at early stages of development

Beck

Räsänen

Ahi

et al. 2018

Evolution and Development

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Gene expression during development shapes the phenotypes of individuals. Although embryonic gene expression can have lasting effects on developmental trajectories, few studies consider the role of maternal effects, such as egg size, on gene expression. Using qPCR, we characterize relative expression of 14 growth and/or skeletal promoting genes across embryonic development in Arctic charr (Salvelinus alpinus). We test to what extent their relative expression is correlated with egg size and size at early life‐stages within the study population. We predict smaller individuals to have higher expression of growth and skeletal promoting genes, due to less maternal resources (i.e., yolk) and prioritization of energy toward ossification. We found expression levels to vary across developmental stages and only three genes (Mmp9, Star, and Sgk1) correlated with individual size at a given developmental stage. Contrary to our hypothesis, expression of Mmp9 and Star showed a non‐linear relationship with size (at post fertilization and hatching, respectively), whilst Sgk1 was higher in larger embryos at hatching. Interestingly, these genes are also associated with craniofacial divergence of Arctic charr morphs. Our results indicate that early life‐stage variation in gene expression, concomitant to maternal effects, can influence developmental plasticity and potentially the evolution of resource polymorphism in fishes.

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Section: Discussionmentioning

confidence: 99%

Gene expression in the phenotypically plastic Arctic charr (Salvelinus alpinus): A focus on growth and ossification at early stages of development

Beck

Räsänen

Ahi

et al. 2018

Evolution and Development

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“…As such, when feed is provided earlier in development (e.g., 30 hph) cannibalism and associated mortality during aquaculture rearing can both be minimized. This is supported by Lima et al [20] who demonstrated that a delay in initial feeding time (i.e., into exogenous feeding stage) increased mortality and retarded growth performance of silver catfish (Rhamdia voulezi) larvae and recommended that initial feeding should commence before complete yolk sac absorption. Baolong et al [35] also confirmed the importance of initial feeding moment on red sea bream (Pagrosomus major) and olive flounder (Paralichthys olivaceus) larvae in that both growth and survival of these fish larvae decreased as initial feeding time increased beyond complete yolk sac absorption (i.e., into exogenous feeding stage).…”

Section: Discussionmentioning

confidence: 79%

“…Cannibalism can be reduced during larviculture if these environmental factors are effectively controlled [18]. Furthermore, a delay in the timing of first feeding can increase mortality in fish larvae due to starvation and, thus, optimal fish larvae performance depends on availability of prey organism when the yolk sac is resorbed and fish larvae switch on exogenous food [19,20].…”

Section: Introductionmentioning

confidence: 99%

Optimized Live Feed Regime Significantly Improves Growth Performance and Survival Rate for Early Life History Stages of Pangasius Catfish (Pangasianodon hypophthalmus)

Huynh

2020

Fishes

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This study aimed to determine the optimal live feed regime (i.e., initial feeding moment, density, and frequency) for maximum growth and survival of pangasius catfish (Pangasianodon hypophthalmus) early life history stages. The first experiment assessed the optimal initial feeding moment (30, 36, 42, and 48 h post hatching, hph). The second experiment assessed feeding density (3, 5, 8 and 11 individuals per mL, ind/mL) at the optimal initial feeding moment (30 hph) which was the best result from the first experiment. The third experiment assessed optimal feeding frequency (1, 2, 4, and 6 times per day) at the optimal initial feeding moment (30 hph) and density (8 ind/mL) which was drawn upon from the second experiment. All experiments were conducted in 20 L containers containing 20 hph P. hypophthalmus larvae at a density of 10 ind/L and fed rotifers (Brachionus angularis) for 3 days and then water fleas (Moina macrocopa) for 7 days. The first experiment demonstrated that larvae initially fed at 30 hph exhibited a significantly higher survival rate (24%) than larvae initially fed at 36, 42, and 48 hph (19%, 16%, and 16%), respectively. The second experiment demonstrated that larvae fed at 8 and 11 ind/mL densities exhibited significantly higher survival rates (32% and 32%) than larvae fed at 3 and 5 ind/mL densities (13% and 23%), respectively. The third experiment demonstrated that the highest survival rate (66%) was obtained when larvae were fed 6 times per day. These results provide valuable insights regarding the optimal live feed regime for better growth and survival of P. hypophthalmus larvae, which are commercially important and numerously cultured throughout the Mekong Delta region.

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“…However, it is important to highlight the increase in the number of deaths observed from the eighth day of fasting onwards, which may indicate that for freshwater angelfish at this phase of development, periods of fasting longer than eight days may exceed the limit of energy reserve of individuals that are less adapted to this challenge. Several authors (Xiwu et al 2009, Sun & Li 2014, Lima et al 2017 have reported that there is a critical starvation point, called point-of-no-return (PNR), at which some animals lose the ability to feed and consequently die (Blaxter & Hempel 1963) or even when they manage to feed, fail to resume life-essential metabolic activities and die (Lasker et al 1970). Despite the different interpretation methodologies of PNR, most of them consider that this point is only reached when within a population, 50% of mortality occurs, which did not occur in any of the present experiment treatments.…”

Section: Survival Estimatementioning

confidence: 99%

Effect of fasting on freshwater angelfish Pterophyllum scalare (Lichtenstein; Pisces: Cichlidae) development

Motta

Glória

Souza

et al. 2021

Lat. Am. J. Aquat. Res.

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We tested the effect of fasting on the development of juvenile freshwater angelfish (Pterophyllum scalare). The juveniles were subjected to different fasting periods (0, 3, 6, 9, 12, and 15 days of fasting). Fish from all treatments were fed for 30 days after the fasting period. No difference (P > 0.05) was observed between treatments for final weight and length. There was a significant difference (P < 0.05) in treatments 12 and 15 days fasting for liver and intestine weight. These results may prove that 12 and 15 days of fasting force juveniles to use energy reserves, and these adaptations may also represent a saving energy strategy. The fish subjected to treatments 6, 9, 12, and 15 days of fasting showed different vacuolization in hepatocytes from the ones subjected to 0 and 3 days of fasting (P < 0.05). These results show that during the lack of feeding, juveniles (P. scalare) mobilizes energy stored in the liver. No difference (P > 0.05) was observed between treatments for survival rate. However, the increase in the number of deaths from the eighth day of fasting may indicate that periods with more than 15 days of fasting could be fatal to this species during this life stage. According to our findings, it can be assumed that juvenile freshwater angelfishes have strategies (e.g. a decrease in liver and intestine weight) to resist 15 days of fasting.

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Effects of delayed first feeding on growth of the silver catfish larvae Rhamdia voulezi (Siluriformes: Heptapteridae)

Cited by 7 publications

References 31 publications

Gene expression in the phenotypically plastic Arctic charr (Salvelinus alpinus): A focus on growth and ossification at early stages of development

Gene expression in the phenotypically plastic Arctic charr (Salvelinus alpinus): A focus on growth and ossification at early stages of development

Optimized Live Feed Regime Significantly Improves Growth Performance and Survival Rate for Early Life History Stages of Pangasius Catfish (Pangasianodon hypophthalmus)

Effect of fasting on freshwater angelfish Pterophyllum scalare (Lichtenstein; Pisces: Cichlidae) development

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