Requerimientos de proteínas y lípidos en crías de Petenia splendida (Günther, 1862) (Perciformes: Cichlidae)
The approximate levels of dietary proteins and lipids that would sustain growth and feed efficiency in fingerlings of Bay Snook Petenia splendida (Günther, 1862) were determined in a feeding experiment. The experiment was carried out in a recirculating-water system (RWS) with twelve 40L-glass recipi...
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| Format: | master thesis |
| Status: | Published version |
| Publication Date: | 2010 |
| Country: | México |
| Institution: | Universidad Autónoma Metropolitana |
| Repository: | Repositorio Institucional de la UAM Iztapalapa |
| Language: | Spanish |
| OAI Identifier: | oai:bindani.izt.uam.mx:x633f1200 |
| Online Access: | https://doi.org/10.24275/uami.x633f1200 |
| Access Level: | Open access |
| Keyword: | info:eu-repo/classification/LEM/Acuicultura info:eu-repo/classification/LEM/Petenia splendida info:eu-repo/classification/LEM/Aquaculture info:eu-repo/classification/LEM/Fishes Food info:eu-repo/classification/LEM/Alimentos -- Tecnología info:eu-repo/classification/LEM/Peces -- Alimentación y alimentos info:eu-repo/classification/LEM/Food Technology info:eu-repo/classification/cti/2 |
| Summary: | The approximate levels of dietary proteins and lipids that would sustain growth and feed efficiency in fingerlings of Bay Snook Petenia splendida (Günther, 1862) were determined in a feeding experiment. The experiment was carried out in a recirculating-water system (RWS) with twelve 40L-glass recipients within an initial density of 17 fish per recipient. Six fish-meal and soybean extrudes were formulated to contain three levels of protein (30, 40 and 50%) as well corn and fish oils were used to reach two levels of lipids (6 and 12%), with dietary gross energy ranging from 17.6 to 19.4 MJ kg⁻¹ and digestible energy fluctuating from 13.7 to 16.5 MJ kg⁻¹ . Fishes were fed with the diets for 120 days in duplicates groups in fingerlings of Bay Snook with an average initial weight of 0.18 ± 0.05 g. The results indicated significant differences among the experimental diets. Survival rates (76.5 to 97.1%); average final total weights (0.625 to 0.927 g); gain of average total weights (31.65 to 71.34%); specific growth rate (1.17 to 1.57 % day⁻¹ ); individual feed intakes (0.46 to 0.62 g) and protein efficiency ratio (2.87 to 6.10) were affected by different dietary treatments and condition factor (1.10 to 1.31) and food conversion ratio (0.87 to 1.8) did not present differences between experimental diets. Diet containing 50% of proteins and 12 % lipids had significant differences (P !0.05) and higher mean values of average final total weights, gain of average total weight, specific growth rate, individual feed intake, protein efficiency ratio, and survival rate. The results also indicated that the diet containing 50% of protein and 12% of lipids, 19.3 MJ kg⁻¹ of gross energy and 16.5 MJ kg⁻¹ of digestible energy was suitable for growth and feed efficiency in fingerlings of Bay Snook under the experimental conditions used in this study. |
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