Polyculture of all-male tilapia hybrids with low densities of Macrobrachium rosenbergii
Policultivo de híbridos machos de tilapia a bajas densidades de Macrobrachium rosenbergii
| dc.creator | ||
| dc.creator | ||
| dc.date | 1987-04-01 | |
| dc.date.accessioned | 2022-11-04T15:30:28Z | |
| dc.date.available | 2022-11-04T15:30:28Z | |
| dc.identifier | https://revistas.upr.edu/index.php/jaupr/article/view/6945 | |
| dc.identifier | 10.46429/jaupr.v71i2.6945 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5123270 | |
| dc.description | Each of six 700-m2 earthen ponds was stocked with all-male hybrid fingerlings (28 g) from the cross of female Tilapia nilotica x male T. hornorum, at a rate of 0.4 fish/m2. Six days later, duplicate ponds were stocked with either 0.5, 1.0 or 1.5 juvenile prawns (Macrobrachium rosenbergii) (2 g) per m2. Initially 32% protein pellets were fed daily at 2.5% of fish biomass; this ratio was decreased to 1.4% by harvest. At the low, medium and high prawn densities, average yields after 20 weeks were 171, 243, and 350 kg/ha lor prawns and 1,404; 1,450; and 1,356 kglha for tilapia, respectively. At these densities, 84.4, 87.7, and 85.4% of the prawns weighed 30 g or more, whereas 75.0, 67.5, and 71.3% weighed 40 g or more, respectively. Average weight of tilapia was 395 g among all ponds, independent of prawn density. | en-US |
| dc.description | En 6 estanques de tierra de 700 m2 cada uno se sembraron alevines machos híbridos de 28 g. de Tilapia nilotica hembra X T. hornorum macho, a razón de 0.4 peces/m2. Estos mismos estanques se sembraron (en duplicado) 6 días después, con 0.5, 1.0, ó 1.5 camarones (Macrobrachium rosenbergii) juveniles de 2 g. por m2, respectivamente. lnicialmente, se les suministró alimento en perdigones que contenían 32% de proteína a 2.5% de la biomasa de pez que se disminuyó diariamente hasta 1.4% al momento de la cosecha. Para la densidad baja, mediana y alta, respectivamente, la producción media de camarones al cabo de 20 semanas fue de 171, 243 y 350 kg./ha. y de 1404, 1450 y 1356 kg./ha. de tilapia por hectárea. A esas mismas densidades, 84.4, 87.7 y 85.4% de los camarones pesaron 30 g. o más, mientras que 75.0, 67.5 y 71.3%, respectivamente, pesaron 40 g. o más al cosechar. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | University of Puerto Rico Mayagüez Campus Agricultural Experiment Station | en-US |
| dc.relation | https://revistas.upr.edu/index.php/jaupr/article/view/6945/5595 | |
| dc.rights | Derechos de autor 2017 Journal of Agriculture of the University of Puerto Rico. | es-ES |
| dc.source | The Journal of Agriculture of the University of Puerto Rico; Vol. 71 No. 2 (1987): Vol. 71, No. 2, April 1987; 225-229 | en-US |
| dc.source | Journal of Agriculture of the University of Puerto Rico; Vol. 71 Núm. 2 (1987): Vol. 71, No. 2, April 1987; 225-229 | es-ES |
| dc.source | 2308-1759 | |
| dc.source | 0041-994X | |
| dc.source | 10.46429/jaupr.v71i2 | |
| dc.subject | Poly-aquaculture | en-US |
| dc.subject | Nile tilapia--Effect of habitat modification on | en-US |
| dc.subject | Macrofrachium rosenbergii--Effect of habitat modification on | en-US |
| dc.title | Polyculture of all-male tilapia hybrids with low densities of Macrobrachium rosenbergii | en-US |
| dc.title | Policultivo de híbridos machos de tilapia a bajas densidades de Macrobrachium rosenbergii | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion |