|
|
|
|
|
| Baccarin,Ana Eliza; Camargo,Antonio Fernando Monteiro. |
| The objective of this study was to evaluate the effect of different feed management on the quality of effluent water generated in Nile tilapia (Oreochromis niloticus) culture ponds. Feed was supplied as follows: natural food, and pelleted, extruded or minced ration. The study was conducted during 19 weeks in 12 continuous water exchange ponds of 300 m² each, with a population of male Nile tilapia juveniles, in a density equal to 1.7 fish m-2. Feeds contained 30% crude protein, 3,000 kcal digestible energy, and were supplied twice a day. Natural food consisted of chicken manure. Temperature, dissolved oxygen, pH, total phosphorus, total nitrogen, chlorophyll a and suspended solids were monitored weekly in the supplying and effluent water. Water residence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish culture; Environmental impact; Feed management; Effluent. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100012 |
| |
|
|
| RODRIGUES,Ana Paula Oeda; LIMA,Adriana Ferreira; ANDRADE,Caniggia Lacerda; MEDEIROS,Rafaella Machado dos Santos de. |
| ABSTRACT Pirarucu is one of the main fish species for the development of aquaculture in the Amazon. In this study, the optimal feeding frequency for juvenile pirarucu was assessed based on growth and feed efficiency. Juvenile pirarucu weighing ca. 80 g were fed once, twice, three or four times daily until apparent satiation for 63 days. Fish fed three or four times per day presented higher growth, feed intake, and fat body content than those fed once or twice per day. There was no significant difference for feed conversion ratio, and protein and energy retention rates among treatments, suggesting that increased feeding frequency did not affect feed utilization efficiency. Mean feed intake per meal was higher when fish were fed once per day, possibly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feed management; Feed utilization; Feeding practice; Osteoglossiformes. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000100011 |
| |
|
|
| Fujimoto,Rodrigo Yudi; Santos,Rudã Fernandes Brandão; Dias,Henrique Malta; Ramos,Fabrício Menezes; Silva,Derlan José Ferreira; Honorato,Claucia Aparecida. |
| ABSTRACT: Angelfish (Pterophyllum scalare) is a very important species in Brazil's domestic market, however feeding managements differ from fish breeders to aquarists, so the cost of feed and labor become relevant items when cultivating the species. The objective of this research was to assess feeding frequency and feed deprivation based on growth performance, parasite infestation and cost-benefit in farming this species. The experiment was conducted in a completely randomized design in a 3x2 factorial scheme with 3 daily feeding levels, 4 meals, 2 meals and 1 meal; with and without feed deprivation and two repetitions. Feed deprivation consisted of offering feed 5 days a week only. Feeding twice a day without deprivation and four times a day with or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pterophyllum Scalare; Feed management; Ornamental fish.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000200304 |
| |
|
|
| Oliveira,Ricardo Luís Mendes de; Santos,Leilane Bruna Gomes dos; Silva Neto,Nelson Gomes da; Silva,Scarlatt Paloma Alves da; Silva,Felipe dos Santos; Melatti,Enrique; Cavalli,Ronaldo Olivera. |
| ABSTRACT The effects of feeding rate and feeding frequency on the growth of laboratory-reared common snook (Centropomus undecimalis) were evaluated. Juveniles with mean±SD weight of 2.55±0.48 g and total length of 6.81±0.48 cm were divided into groups of 20 fish and reared in 30 polyethylene tanks of 50 L for 60 days. The experimental design was a 3 × 3 factorial with three feeding frequencies (F2, F4, and F6: two, four, and six daily meals, respectively), three feeding rates (R1, R2.5, and R4: 1.0, 2.5, and 4.0%/day of fish biomass, respectively), and three replicates, totaling nine treatments (F2R1, F2R2.5, F2R4; F4R1, F4R2.5, F4R4; F6R1, F6R2.5, and F6R4). The external control consisted of four meals a day offered to apparent satiety (F4S). Every 15... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Feeding; Feed management; Marine fish farming. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100152 |
| |
|
|
| Cunha,Viviana Lisboa da; Shei,Marcelo Roberto Pereira; Okamoto,Marcelo Hideo; Rodrigues,Ricardo Vieira; Sampaio,Luís André. |
| 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. The tested feeding rates and frequencies did not influence survival. Final weight and length in experiment I were significantly lower in fish fed 4% body weight per day, whereas in experiment II only weight was significantly lower in fish fed 2 and 6... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trachinotus marginatus; Feed management; Marine fish culture. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800023 |
| |
|
|
| Sousa,R.M.R.; Agostinho,C.A.; Oliveira,F.A.; Argentim,D.; Novelli,P.K.; Agostinho,S.M.M.. |
| The performance of Nile tilapia (Oreochromis niloticus) raised in cages furnished with an automatic dispenser, supplied at different frequencies (once per hour and once every two hours) and periods (daytime, nighttime and both) was evaluated. Eighteen 1.0m³ cages were placed into a 2000m² pond, two meters deep with a 5% water exchange. One hundred and seventy tilapias, with initial weight of 16.0±4.9g, were dispersed into each 1m³ cage and the feed ration was adjusted every 21 days with biometry. Data was collected from March to July (autumn and winter). Significant difference to final weight (P<0.05) among treatments was observed. The increase in feeding frequency improves the productive performance of Nile tilapias in cages and permitted better... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Automatic feeding; Cage; Feed management. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000100027 |
| |
|
| |
|
|
|
