Abstract:-The objective of this work was to evaluate the ideal feeding rate and frequency for juvenile pompano (Trachinotus marginatus). Two experiments were carried out in a completely randomized design, with three replicates each. In experiment I, 25 fish (4.8±0.6 g and 6.48±0.01 cm) were stocked in 15 tanks (50 L) during 21 days and fed 4, 8, 12, 16, and 20% body weight per day. In experiment II, 20 fish (4.1±0.1 g and 6.6±0.1 cm) were stocked in 15 tanks (40 L) during 28 days and fed 2, 6, 8, and 10 times a day. Th… Show more
“…On the other hand, some studies have shown that increased frequency may lead to a reduction in feed conversion. Cunha et al, () evaluated different frequencies (2, 6, 8 and 10 times a day) and obtained a lower feed conversion using higher feeding frequencies. Kasiri et al, () concluded that an increased feeding frequency resulted in greater food consumption and fish growth; however, inversely proportional, higher frequencies caused a poorer food conversion.…”
Section: Discussionmentioning
confidence: 99%
“…Defining food management should allow for the full manifestation of the species performance, the economic viability of the crop and its environmental sustainability, with a focus on effluent reduction (Cunha, Shei, Okamoto, Rodrigues, & Sampaio, ). Feeding frequency is a component of food management which defines how many times the food will be offered throughout the 24 hours of the day.…”
Section: Introductionmentioning
confidence: 99%
“…Feeding frequency is a component of food management which defines how many times the food will be offered throughout the 24 hours of the day. The use of an optimum feeding frequency promotes better growth, more homogenous batches (lower coefficient of variation), high survival, lower feed conversion, as well as minimizing the release of effluents and contributing to reduce the environmental impact of crops (Cunha et al, ). On the other hand, inadequate feeding frequencies may delay growth, increase intra‐specific aggressions and cannibalism rates, decrease intestinal enzyme activity and reduce hepatic expression, resulting in significant economic losses and reduction in crop profitability (Booth, Tucker, Allan, & Fielder, ; Tian et al, ).…”
Section: Introductionmentioning
confidence: 99%
“…The productive performance of marine fish can be positively influenced when feeding frequency is high (Cunha et al, ; De La Gándara, García‐Gómez, & Jover, ). However, in most studies, the frequencies examined are relatively low and range from once a day to eight times a day, with very few studies examining frequencies >12 times a day.…”
Salt-water recirculation systems using automatic feeders are a new frontier for marine aquaculture. The definition of the feed frequency is fundamental for the correct use of automatic feeders. Different feeding frequencies (1, 3, 6, 12 and 18 times a day) using automatic feeders were evaluated in two experiments on the performance of the dusky grouper (Epinephelus marginatus) in salt-water recirculation system. In the first experiment, three feeding frequencies were evaluated: feeding once a day; three times a day and six times a day. In the second experiment, three feeding frequencies were evaluated: feeding six times a day; 12 times a day and 18 times a day.Waters parameters (temperature, salinity, oxygen level, total ammonia, pH and oxidation-reduction potential) were maintained at specific ranges for the species. Among all the evaluated frequencies, 12 times a day provided the best productive performance, obtaining superior results for final weight, final biomass, specific growth rate and daily weight gain. For juveniles of the dusky grouper, the ideal feeding frequency is regular feedings every 2 hours, which is impractical to run without the use of automatic feeders.
“…On the other hand, some studies have shown that increased frequency may lead to a reduction in feed conversion. Cunha et al, () evaluated different frequencies (2, 6, 8 and 10 times a day) and obtained a lower feed conversion using higher feeding frequencies. Kasiri et al, () concluded that an increased feeding frequency resulted in greater food consumption and fish growth; however, inversely proportional, higher frequencies caused a poorer food conversion.…”
Section: Discussionmentioning
confidence: 99%
“…Defining food management should allow for the full manifestation of the species performance, the economic viability of the crop and its environmental sustainability, with a focus on effluent reduction (Cunha, Shei, Okamoto, Rodrigues, & Sampaio, ). Feeding frequency is a component of food management which defines how many times the food will be offered throughout the 24 hours of the day.…”
Section: Introductionmentioning
confidence: 99%
“…Feeding frequency is a component of food management which defines how many times the food will be offered throughout the 24 hours of the day. The use of an optimum feeding frequency promotes better growth, more homogenous batches (lower coefficient of variation), high survival, lower feed conversion, as well as minimizing the release of effluents and contributing to reduce the environmental impact of crops (Cunha et al, ). On the other hand, inadequate feeding frequencies may delay growth, increase intra‐specific aggressions and cannibalism rates, decrease intestinal enzyme activity and reduce hepatic expression, resulting in significant economic losses and reduction in crop profitability (Booth, Tucker, Allan, & Fielder, ; Tian et al, ).…”
Section: Introductionmentioning
confidence: 99%
“…The productive performance of marine fish can be positively influenced when feeding frequency is high (Cunha et al, ; De La Gándara, García‐Gómez, & Jover, ). However, in most studies, the frequencies examined are relatively low and range from once a day to eight times a day, with very few studies examining frequencies >12 times a day.…”
Salt-water recirculation systems using automatic feeders are a new frontier for marine aquaculture. The definition of the feed frequency is fundamental for the correct use of automatic feeders. Different feeding frequencies (1, 3, 6, 12 and 18 times a day) using automatic feeders were evaluated in two experiments on the performance of the dusky grouper (Epinephelus marginatus) in salt-water recirculation system. In the first experiment, three feeding frequencies were evaluated: feeding once a day; three times a day and six times a day. In the second experiment, three feeding frequencies were evaluated: feeding six times a day; 12 times a day and 18 times a day.Waters parameters (temperature, salinity, oxygen level, total ammonia, pH and oxidation-reduction potential) were maintained at specific ranges for the species. Among all the evaluated frequencies, 12 times a day provided the best productive performance, obtaining superior results for final weight, final biomass, specific growth rate and daily weight gain. For juveniles of the dusky grouper, the ideal feeding frequency is regular feedings every 2 hours, which is impractical to run without the use of automatic feeders.
“…A utilização de dietas para peixes marinhos pode ser limitada pela ausência de informações sobre práticas adequadas de manejo alimentar (Ramos et al, 2012, Sanches et al, 2014. A determinação do protocolo alimentar contribui para reduzir o desperdício de ração e o lançamento de efluentes, elevando o retorno econômico dos cultivos (Cunha et al, 2013).…”
Section: Compensatory Growth and Food Deprivation In Common Snook Grounclassified
Resumo -O objetivo deste trabalho foi avaliar o efeito da privação alimentar e a ocorrência de crescimento compensatório sobre o desempenho produtivo de formas jovens do robalo-flecha (Centropomus undecimalis). O experimento teve duração de 60 dias, em que os peixes -35 indivíduos por tanque -foram divididos nos três seguintes grupos de tratamentos: com alimentação todos os dias (controle); com alimentação cinco dias por semana, seguidos de dois dias de jejum; e com alimentação quatro dias por semana, seguidos de três dias de jejum. Os tratamentos de privação alimentar proporcionaram indicadores de desempenho significativamente inferiores aos do controle. Formas jovens da espécie não devem ser submetidas a períodos de privação alimentar, pelos prejuízos que esta prática acarreta ao desempenho produtivo.Termos para indexação: Centropomus undecimalis, hiperfagia, manejo alimentar, maricultura.
Compensatory growth and food deprivation in common snook growth performanceAbstract -The objective of this work was to evaluate the effect of food deprivation and the occurrence of compensatory growth on the performance of common snook fingerlings (Centropomus undecimalis). The experiment lasted for 60 days, when fish -35 individuals per tank -were divided into three groups of treatments, as follows: daily feeding (control); feeding for five days a week, followed by two days of fast; and feeding for four days a week, followed by three days of fast. The treatments of alimentary restriction provided performance indicators significantly inferior to those of the control. Common snook fingerlings should not be subjected to food restriction because of the damages that this practice entails to productive performance.
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