| Título: |
Can a small change in the tilapia’s on-going feeding strategy impair its growth? - doi: 10.4025/actascianimsci.v35i3.18290 Can a small change in the tilapia’s on-going feeding strategy impair its growth? - doi: 10.4025/actascianimsci.v35i3.18290 |
| Autores: |
Caldini, Nayara Nunes; Universidade Federal do Ceará Pereira, Nayagra Vidal; Universidade Federal do Ceará Rebouças, Vanessa Tomaz; Universidade Federal do Ceará Sá, Marcelo Vinícius do Carmo e; UFC |
| Fecha: | 2013-07-08 |
| Publicador: | Editora da Universidade Estadual de Maringá |
| Fuente: |
Ver documento |
| Tipo: |
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| Tema: |
feeding schedule; circadian rhythm; feeding management;fish culture Feeding schedule; Circadian rhythm; Feeding management;Fish culture |
| Descripción: |
The aim of the present work was to answer the following question: can a small change in the tilapia’s on-going feeding strategy impair its growth? In the initial phase of the study, fish were evenly distributed and maintained for two weeks in four tanks. In tanks 1 and 2, the ration was given in three equal meals at 8, 12 and 16h or at 9, 13 and 17h, respectively. In tanks 3 and 4, there was only one daily meal at 9 or 10 o’clock, respectively. In the second 8-week phase, fish from tank 1 were distributed into two groups in ten 100-L tanks: the 8-12-16 group, in which fish were always fed at 8, 12 and 16h; and the 8-12-16/9-13-17 group, in which fish were fed at 8, 12 and 16h in the first four weeks and at 9, 13 and 17h in the last four weeks. Fish from tank 2 were allocated into five 100-L tanks and their mealtimes were maintained unchanged. The same procedures were used in tanks 3 and 4. The delay of one hour in the allowance of the artificial diet has significantly reduced fish survival. The aim of the present work was to answer the following question: can a small change inthe tilapia’s on-going feeding strategy impair its growth? In the initial phase of the study, fish were evenlydistributed and maintained for two weeks in four tanks. In tanks 1 and 2, the ration was given in threeequal meals at 8, 12 and 16h or at 9, 13 and 17h, respectively. In tanks 3 and 4, there was only one dailymeal at 9 or 10 o’clock, respectively. In the second 8-week phase, fish from tank 1 were distributed intotwo groups in ten 100-L tanks: the 8-12-16 group, in which fish were always fed at 8, 12 and 16h; and the8-12-16/9-13-17 group, in which fish were fed at 8, 12 and 16h in the first four weeks and at 9, 13 and 17hin the last four weeks. Fish from tank 2 were allocated into five 100-L tanks and their mealtimes weremaintained unchanged. The same procedures were used in tanks 3 and 4. The delay of one hour in theallowance of the artificial diet has significantly reduced fish survival. |
| Idioma: | Inglés |