New findings in the searching of an optimal diet for the axolotl Ambystoma mexicanum: protein levels

• Manjarrez-Alcívar, Itzel ^[1] ; Vega-Villasante, Fernando ^[2] ; Montoya-Martínez, Cynthia E. ^[3] ; López-Félix, Erick F. ^[4] ; Badillo-Zapata, Daniel ^[5] ; Martínez-Cárdenas, Leonardo ^[1]
  1. [1] Universidad Autónoma de Nayarit

     Universidad Autónoma de Nayarit

     México

     
  2. [2] Universidad de Guadalajara

     Universidad de Guadalajara

     México

     
  3. [3] Instituto Politécnico Nacional

     Instituto Politécnico Nacional

     México

     
  4. [4] PIMVS AXOS
  5. [5] CONACyT.

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• Localización: Agro Productividad, ISSN-e 2594-0252, Vol. 15, Nº. 6, 2022 (Ejemplar dedicado a: Junio), págs. 19-28
• Idioma: inglés
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• Resumen

  • Objective: To determine the protein nutritional requirements in juvenile axolotls (Ambystoma mexicanum) based on four isocaloric diets (8% lipids) with 30, 35, 30, and 45% protein.

    Design/methodology/approach: Six axolotls were used per test, during a period of 81 days. The diets were prepared using fishmeal as a protein source and fish oil as a lipid source. The feed was supplied every 48 h with 4% of the weight of the biomass of organisms per experimental reservoir. Four biometrics were performed throughout the experiment and growth parameters were determined: height, weight gained per day, specific growth rate, survival, Fulton’s K, and protein efficiency rate. The digestibility of each of the diets was also determined.

    Results: There were significant differences in the growth and survival of the axolotls, the diet with 45% protein showed the best growth results. Limitations/implications: No more protein levels could be tested, due to the number of organisms available for bioassays.

    Findings/conclusions: Diets for the axolotl (A. mexicanum) containing 45% protein level promote good development and survival. This allows for improved cultivation and management plans for the species.