The effect of dietary n-3 LC-PUFA levels on growth, survival, and feed utilization in juvenile Totoaba macdonaldi
| Autor: | José Pablo Fuentes-Quesada, María Teresa Viana, Juan Pablo Lazo, Gloria Villareal-Rodarte, Benjamín Barón-Sevilla |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
0303 health sciences Fatty acid Percent survival 04 agricultural and veterinary sciences Aquatic Science Biology Proximate composition Body weight Feed conversion ratio Condition factor 03 medical and health sciences Animal science chemistry 040102 fisheries 0401 agriculture forestry and fisheries Juvenile Whole body 030304 developmental biology |
| Zdroj: | Aquaculture. 525:735350 |
| ISSN: | 0044-8486 |
| Popis: | The n-3 LC-PUFAs requirement was evaluated for Totoaba macdonaldi. Four isonitrogenous and isolipidic diets were formulated to contain increasing levels of n-3 LC-PUFAs (0.4, 0.8, 1.0, and 1.4% of the dry diet) and fed to juvenile totoaba (1.5 g initial body weight and 47 mm initial total length) for 56 days. Growth, survival, fish whole body proximate composition, fatty acid profile, feed utilization, and condition factor were evaluated in triplicate groups. Growth in terms of final weight and total length of fish fed diets containing 1.0% n-3 LC-PUFAs resulted in significantly higher values (16.11 ± 0.38 g and 119.62 ± 1.81 mm, respectively) compared to other treatments. However, fish fed diets supplemented with 1.4% n-3 LC-PUFAs resulted in the lowest final weight and total length (12.34 ± 0.49 g and 110.13 ± 0.92 mm, respectively). There were no significant differences in percent survival (all treatments 100%) and condition factor among treatments. The recommended n-3 LC-PUFA level in the diet for juvenile totoaba to attain the highest growth, and survival, as estimated here for 1 g fish, is 0.92% n-3 LC-PUFAs of the diet. Additionally, feed utilization in terms of feed conversion rate was lower in fish fed the diet containing 1.0% n-3 LC-PUFAs compared with the other treatments (0.7 vs. 0.8, P |
| Databáze: | OpenAIRE |
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