Growth and survival of juvenile Pacific fat sleeper Dormitator latifrons (Richardson 1844) fed with diets based on sacha inchi (Plukenetia volubilis L. 1753, Plantae: Euphorbiaceae)
An experimental study was carried out with juveniles of the Pacific fat sleeper Dormitator latifrons in order to evaluate the substitution of fishmeal in a dry feed for sacha inchi cake meal (Plukenetia volubilis) and its effect on growth and survival in intensive cultivation. A total of 360 organis...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | Ecuador |
| Institución: | Universidad Técnica de Manabi |
| Repositorio: | Revista Aquatechnica |
| Idioma: | español |
| OAI Identifier: | oai:ojs2.revistas.utm.edu.ec:article/4115 |
| Acceso en línea: | https://revistas.utm.edu.ec/index.php/aquatechnica/article/view/4115 |
| Access Level: | acceso abierto |
| Palabra clave: | Eleotridae Cultivo de agua dulce Alimento balanceado Freshwater cultivation Balanced food |
| Sumario: | An experimental study was carried out with juveniles of the Pacific fat sleeper Dormitator latifrons in order to evaluate the substitution of fishmeal in a dry feed for sacha inchi cake meal (Plukenetia volubilis) and its effect on growth and survival in intensive cultivation. A total of 360 organisms with an average weight of 49.7 ± 4.42 g were randomly distributed in twelve geomembrane tanks of 2 m in diameter with 2000 L of water/tank, with a sowing density of 15 fish/m3, during 100 days. Four experimental diets with 35% crude protein were used: D1 (50% sacha inchi meal-HSI and 50% fish meal-HP), D2 (75% HSI and 25% HP), D3 (100% HSI) and DC (100% HP), each with three replicates. At the end of the study, there were no significant differences both in survival (> 98,89%) and weight increases of fish among diet treatments, with a high variability of responses (6.9-14.2 g). Furthermore, the total length-weight relationships of the different diets did not show significant variations, suggesting similar physiological conditions. The growth rates in the present study were lower than those reported in previous investigations with commercial feed, where the stocking density was lower (up to half of the used in the present study). The results show that the use of sacha inchi flour is comparable to the use of fishmeal, which suggests the feasibility of using sacha inchi as a substitute for fishmeal in dry feeds, even in high proportions. |
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